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Patent Analysis of

Fast ion exchangeable glasses with high indentation threshold

Updated Time 12 June 2019

Patent Registration Data

Publication Number

US10000410

Application Number

US14/543925

Application Date

18 November 2014

Publication Date

19 June 2018

Current Assignee

CORNING INCORPORATED

Original Assignee (Applicant)

CORNING INCORPORATED

International Classification

C03C3/091,C03C4/18,C03C3/097,C03C21/00,C03C3/093

Cooperative Classification

C03C4/18,C03C3/091,C03C3/093,C03C3/097,C03C21/002

Inventor

DEJNEKA, MATTHEW JOHN,MAURO, JOHN CHRISTOPHER

Patent Images

This patent contains figures and images illustrating the invention and its embodiment.

US10000410 Fast ion exchangeable glasses 1 US10000410 Fast ion exchangeable glasses 2
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Abstract

Alkali aluminosilicate glasses that are ion exchangeable to high compressive stresses, have fast ion exchange kinetics, and high intrinsic damage resistance. The glasses achieve all of the above desired properties either with only small amounts of P2O5 (<1 mol %) or without addition of any P2O5.

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Claims

1. A glass, the glass comprising: from 50 mol % to 72 mol % SiO2; from 12 mol % to 22 mol % Al2O3; up to 6.5 mol % B2O3; up to 1 mol % P2O5; from 11 mol % to 21 mol % Na2O; greater than 0.0 to 0.26 mol % K2O; up to 4 mol % MgO; up to 5 mol % ZnO; and up to 2 mol % CaO, wherein Na2O+K2O−Al2O3≤2.0 mol %, B2O3−(Na2O+K2O−Al2O3)>1 mol %, 30.84 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, the glass is substantially free of TiO2, and the glass is ion exchanged and has a Vickers crack indentation threshold of at least 17.5 kgf.

2. The glass of claim 1, wherein the glass is substantially free of at least one of P2O5 and Li2O.

3. The glass of claim 2, wherein the glass is substantially free of Li2O.

4. The glass of claim 1, wherein 56 mol %≤SiO2+B2O3≤75 mol %.

5. The glass of claim 1, wherein the glass has a layer under compressive stress CS of greater than 500 MPa, the layer extending from a surface of the glass to a depth of layer DOL, wherein CS·DOL=44000 MPa·μm.

6. The glass of claim 1, wherein the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 40 μm, and has been ion exchanged for less than four hours.

7. The glass of claim 1, wherein the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 52 μm, and has been ion exchanged for less than eight hours.

8. The glass of claim 1, wherein the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 30 μm, and has been ion exchanged for less than two hours.

9. The glass of claim 1, wherein the glass is substantially free of As2O3 and Sb2O3.

10. The glass of claim 1, wherein the glass further comprises at least one fining agent.

11. The glass of claim 10, wherein the at least one fining agent comprises at least one of SnO2, CeO2, As2O3, Sb2O3, Cl, and F.

12. The glass of claim 11, wherein the at least one fining agent comprises at least one of up to 0.5 mol % SnO2, up to 0.5 mol % As2O3, and up to 0.5 mol % Sb2O3.

13. The glass of claim 1, wherein the glass has a liquidus viscosity of at least 100 kpoise.

14. The glass of claim 13, wherein the glass is down-drawable.

15. The glass of claim 1, wherein the glass has a layer under compressive stress CS, the layer extending from a surface of the glass to a depth of layer DOL, and the DOL is ≥55.27 μm.

16. The glass of claim 1, wherein the glass has a Vickers crack indentation threshold of less than or equal to 50.0 kgf.

17. A glass comprising: from 55 mol % to 62 mol % SiO2; from 16 mol % to 20 mol % Al2O3; from 4 mol % to 6.5 mol % B2O3; from 14 mol % to 18 mol % Na2O; from greater than 0.0 mol % to 0.26 mol % K2O; up to 0.5 mol % MgO; up to 0.5 mol % ZnO; and up to 0.5 mol % CaO, wherein the glass is substantially free of P2O5, Na2O+K2O−Al2O3≤0.5 mol %, B2O3−(Na2O+K2O−Al2O3)>4 mol %, 28 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, the glass is substantially free of TiO2, and the glass is ion exchanged and has a Vickers crack indentation threshold of at least 17.5 kgf.

18. The glass of claim 17, wherein the glass is substantially free of Li2O.

19. The glass of claim 17, wherein 56 mol %≤SiO2+B2O3≤70 mol %.

20. The glass of claim 17, wherein 0 mol %≤Σ[R′O]≤0.5 mol %, where R′ is at least one of Ca, Mg, and Zn.

21. The glass of claim 17, wherein the glass is substantially free of As2O3 and Sb2O3.

22. The glass of claim 17, wherein the glass further comprises at least one fining agent, the fining agent comprising at least one of SnO2, CeO2, As2O3, and Sb2O3, Cl, and F.

23. The glass of claim 22, wherein the at least one fining agent comprises at least one of up to 0.5 mol % SnO2, up to 0.5 mol % As2O3, and up to 0.5 mol % Sb2O3.

24. The glass of claim 17, wherein the glass has a liquidus viscosity of at least 100 kpoise.

25. The glass of claim 24, wherein the glass is down-drawable.

26. The glass of claim 17, wherein the glass has a layer under compressive stress CS of greater than 500 MPa, the layer extending from a surface of the glass to a depth of layer DOL, wherein CS·DOL=44000 MPa·μm.

27. The glass of claim 17, wherein the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 40 μm, and has been ion exchanged for less than four hours.

28. The glass of claim 17, wherein the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 52 μm, and has been ion exchanged for less than eight hours.

29. The glass of claim 17, wherein the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 30 μm, and has been ion exchanged for less than two hours.

30. The glass of claim 17, wherein the glass comprises from 4 mol % to 6.0 mol % B2O3.

31. The glass of claim 17, wherein the glass has a Vickers crack indentation threshold of less than or equal to 50.0 kgf.

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Claim Tree

  • 1
    1. A glass, the glass comprising:
    • from 50 mol % to 72 mol % SiO2
    • from 12 mol % to 22 mol % Al2O3
    • up to 6.5 mol % B2O3
    • up to 1 mol % P2O5
    • from 11 mol % to 21 mol % Na2O
    • greater than 0.0 to 0.26 mol % K2O
    • up to 4 mol % MgO
    • up to 5 mol % ZnO
    • and up to 2 mol % CaO, wherein Na2O+K2O−Al2O3≤2.0 mol %, B2O3−(Na2O+K2O−Al2O3)>1 mol %, 30.84 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, the glass is substantially free of TiO2, and the glass is ion exchanged and has a Vickers crack indentation threshold of at least 17.5 kgf.
    • 2. The glass of claim 1, wherein
      • the glass is substantially free of at least one of P2O5 and Li2O.
    • 4. The glass of claim 1, wherein
      • 56 mol %≤SiO2+B2O3≤75 mol %.
    • 5. The glass of claim 1, wherein
      • the glass has a layer under compressive stress CS of greater than 500 MPa, the layer extending from a surface of the glass to a depth of layer DOL, wherein
    • 6. The glass of claim 1, wherein
      • the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 40 μm, and has been ion exchanged for less than four hours.
    • 7. The glass of claim 1, wherein
      • the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 52 μm, and has been ion exchanged for less than eight hours.
    • 8. The glass of claim 1, wherein
      • the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 30 μm, and has been ion exchanged for less than two hours.
    • 9. The glass of claim 1, wherein
      • the glass is substantially free of As2O3 and Sb2O3.
    • 10. The glass of claim 1, wherein
      • the glass further comprises
    • 13. The glass of claim 1, wherein
      • the glass has a liquidus viscosity of at least 100 kpoise.
    • 15. The glass of claim 1, wherein
      • the glass has a layer under compressive stress CS, the layer extending from a surface of the glass to a depth of layer DOL, and the DOL is ≥55.27 μm.
    • 16. The glass of claim 1, wherein
      • the glass has a Vickers crack indentation threshold of less than or equal to 50.0 kgf.
  • 17
    17. A glass comprising:
    • from 55 mol % to 62 mol % SiO2
    • from 16 mol % to 20 mol % Al2O3
    • from 4 mol % to 6.5 mol % B2O3
    • from 14 mol % to 18 mol % Na2O
    • from greater than 0.0 mol % to 0.26 mol % K2O
    • up to 0.5 mol % MgO
    • up to 0.5 mol % ZnO
    • and up to 0.5 mol % CaO, wherein the glass is substantially free of P2O5, Na2O+K2O−Al2O3≤0.5 mol %, B2O3−(Na2O+K2O−Al2O3)>4 mol %, 28 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, the glass is substantially free of TiO2, and the glass is ion exchanged and has a Vickers crack indentation threshold of at least 17.5 kgf.
    • 18. The glass of claim 17, wherein
      • the glass is substantially free of Li2O.
    • 19. The glass of claim 17, wherein
      • 56 mol %≤SiO2+B2O3≤70 mol %.
    • 20. The glass of claim 17, wherein
      • 0 mol %≤Σ[R′O]≤0.5 mol %, where R′ is at least one of Ca, Mg, and Zn.
    • 21. The glass of claim 17, wherein
      • the glass is substantially free of As2O3 and Sb2O3.
    • 22. The glass of claim 17, wherein
      • the glass further comprises
    • 24. The glass of claim 17, wherein
      • the glass has a liquidus viscosity of at least 100 kpoise.
    • 26. The glass of claim 17, wherein
      • the glass has a layer under compressive stress CS of greater than 500 MPa, the layer extending from a surface of the glass to a depth of layer DOL, wherein
    • 27. The glass of claim 17, wherein
      • the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 40 μm, and has been ion exchanged for less than four hours.
    • 28. The glass of claim 17, wherein
      • the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 52 μm, and has been ion exchanged for less than eight hours.
    • 29. The glass of claim 17, wherein
      • the glass has a compressive stress of greater than 800 MPa and a depth of layer of at least 30 μm, and has been ion exchanged for less than two hours.
    • 30. The glass of claim 17, wherein
      • the glass comprises
    • 31. The glass of claim 17, wherein
      • the glass has a Vickers crack indentation threshold of less than or equal to 50.0 kgf.
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Description

BACKGROUND

The disclosure relates to alkali aluminosilicate glasses that are ion exchangeable to high compressive stresses, have fast ion exchange kinetics, and high intrinsic damage resistance.

SUMMARY

The present disclosure provides alkali aluminosilicate glasses that are ion exchangeable to high compressive stresses, have fast ion exchange kinetics, and high intrinsic damage resistance. The glasses described herein achieve all of the above desired properties either with only small amounts of P2O5 (<1 mol %) or without addition of any P2O5.

Accordingly, one aspect of the disclosure is to provide a glass comprising: from about 50 mol % to about 72 mol % SiO2; from about 12 mol % to about 22 mol % Al2O3; up to about 6.5 mol % B2O3; up to about 1 mol % P2O5; from about 11 mol % to about 21 mol % Na2O; up to about 0.95 mol % K2O; up to about 4 mol % MgO; up to about 5 mol % ZnO; and up to about 2 mol % CaO. In some embodiments, Na2O+K2O−Al2O3≤2.0 mol. In some embodiments, B2O3−(Na2O+K2O−Al2O3)>1 mol %. In some embodiments, B2O3−(Na2O+K2O−Al2O3)>1 mol %. In some embodiments, 24 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag.

A second aspect of the disclosure is to provide a glass comprising from about 55 mol % to about 62 mol % SiO2; from about 16 mol % to about 20 mol % Al2O3; from about 4 mol % to about 6.5 mol % B2O3; from about 14 mol % to about 18 mol % Na2O; from about 0.2 mol % to about 0.75 mol % K2O; up to about 0.5 mol % MgO; up to about 0.5 mol % ZnO; and up to about 0.5 mol % CaO, wherein the glass is substantially free of P2O5. In some embodiments, Na2O+K2O−Al2O3≤0.5 mol %. In some embodiments, B2O3−(Na2O+K2O−Al2O3)>4 mol %. In some embodiments, 28 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag. In some embodiments, the glasses are substantially free of TiO2.

Another aspect is to provide a method of ion exchanging a glass. The method comprises ion exchanging an alkali aluminosilicate glass for up to about eight hours in an ion exchange bath at a temperature of about 410° C. or less. The ion exchange bath comprises a potassium salt and the alkali aluminosilicate glass comprising: from about 50 mol % to about 72 mol % SiO2; from about 12 mol % to about 22 mol % Al2O3; up to about 6.5 mol % B2O3; up to about 1 mol % P2O5; from about 11 mol % to about 21 mol % Na2O; up to about 0.95 mol % K2O; up to about 4 mol % MgO; up to about 5 mol % ZnO; and up to about 1 mol % CaO. The ion exchanged alkali aluminosilicate glass has a compressive layer extending from a surface to a depth of layer DOL, the compressive layer having a compressive stress CS of at least about 500 MPa. In some embodiments, the glasses are substantially free of TiO2.

These and other aspects, advantages, and salient features will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view of an ion exchanged glass article.

DETAILED DESCRIPTION

In the following description, like reference characters designate like or corresponding parts throughout the several views shown in the FIGURES. It is also understood that, unless otherwise specified, terms such as “top,”“bottom,”“outward,”“inward,” and the like are words of convenience and are not to be construed as limiting terms. In addition, whenever a group is described as comprising at least one of a group of elements and combinations thereof, it is understood that the group may comprise, consist essentially of, or consist of any number of those elements recited, either individually or in combination with each other. Similarly, whenever a group is described as consisting of at least one of a group of elements or combinations thereof, it is understood that the group may consist of any number of those elements recited, either individually or in combination with each other. Unless otherwise specified, a range of values, when recited, includes both the upper and lower limits of the range as well as any ranges therebetween. As used herein, the indefinite articles “a,”“an,” and the corresponding definite article “the” mean “at least one” or “one or more,” unless otherwise specified. It also is understood that the various features disclosed in the specification and the drawings can be used in any and all combinations.

As used herein, the terms “glass article” and “glass articles” are used in their broadest sense to include any object made wholly or partly of glass. Unless otherwise specified, all compositions are expressed in terms of mole percent (mol %). Coefficients of thermal expansion (CTE) are expressed in terms of 10−7/° C. and represent a value measured over a temperature range from about 20° C. to about 300° C., unless otherwise specified.

As used herein, the term “anneal point,” refers to the temperature at which a glass has a viscosity of 1013.2 poise, the term “strain point” refers to the temperature at which a glass has a viscosity of 1014.7 poise, and the term “softening point” refers to the temperature at which glass visibly softens under its own weight.

It is noted that the terms “substantially” and “about” may be utilized herein to represent the inherent degree of uncertainty that may be attributed to any quantitative comparison, value, measurement, or other representation. These terms are also utilized herein to represent the degree by which a quantitative representation may vary from a stated reference without resulting in a change in the basic function of the subject matter at issue. Thus, a glass that is “substantially free of MgO” is one in which MgO is not actively added or batched into the glass, but may be present in very small amounts as a contaminant.

Vickers crack initiation thresholds described herein are determined by applying and then removing an indentation load to the glass surface at a rate of 0.2 mm/min. The maximum indentation load is held for 10 seconds. The indentation cracking threshold is defined at the indentation load at which 50% of 10 indents exhibit any number of radial/median cracks emanating from the corners of the indent impression. The maximum load is increased until the threshold is met for a given glass composition. All indentation measurements are performed at room temperature in 50% relative humidity.

Compressive stress and depth of layer are measured using those means known in the art. Such means include, but are not limited to, measurement of surface stress (FSM) using commercially available instruments such as the FSM-6000, manufactured by Luceo Co., Ltd. (Tokyo, Japan), or the like, and methods of measuring compressive stress and depth of layer are described in ASTM 1422C-99, entitled “Standard Specification for Chemically Strengthened Flat Glass,” and ASTM 1279.19779 “Standard Test Method for Non-Destructive Photoelastic Measurement of Edge and Surface Stresses in Annealed, Heat-Strengthened, and Fully-Tempered Flat Glass,” the contents of which are incorporated herein by reference in their entirety. Surface stress measurements rely upon the accurate measurement of the stress optical coefficient (SOC), which is related to the birefringence of the glass. SOC in turn is measured by those methods that are known in the art, such as fiber and four point bend methods, both of which are described in ASTM standard C770-98 (2008), entitled “Standard Test Method for Measurement of Glass Stress-Optical Coefficient,” the contents of which are incorporated herein by reference in their entirety, and a bulk cylinder method.

Referring to the drawings in general and to FIG. 1 in particular, it will be understood that the illustrations are for the purpose of describing particular embodiments and are not intended to limit the disclosure or appended claims thereto. The drawings are not necessarily to scale, and certain features and certain views of the drawings may be shown exaggerated in scale or in schematic in the interest of clarity and conciseness.

Disclosed herein are alkali aluminosilicate glasses that are ion exchangeable to high compressive stresses, have fast ion exchange kinetics, and high intrinsic damage resistance. Previously, glasses exhibiting all three of these features contain large amounts of P2O5. The glasses described herein achieve all of the above desired properties either with only small amounts of P2O5 (<1 mol %) or without addition of any P2O5.

Ion exchange is commonly used to chemically strengthen glasses. In one particular example, alkali cations within a source of such cations (e.g., a molten salt, or “ion exchange,” bath) are exchanged with smaller alkali cations within the glass to achieve a layer that is under a compressive stress (CS) near the surface of the glass. For example, potassium ions from the cation source are often exchanged with sodium ions within the glass. Alternatively, other monovalent cations such as, Ag+, Cu+, Tl+, or the like may be introduced into the glass via such ion exchange. The compressive layer extends from the surface to a depth of layer (DOL) within the glass.

A cross-sectional schematic view of a planar ion exchanged glass article is shown in FIG. 1. Glass article 100 has a thickness t, first surface 110, and second surface 112. While the embodiment shown in FIG. 1 depicts glass article 100 as a flat planar sheet or plate, glass article may have other configurations, such as three dimensional shapes or non-planar configurations. Glass article 100 has a first compressive layer 120 extending from first surface 110 to a depth of layer d1 into the bulk of the glass article 100. In the embodiment shown in FIG. 1, glass article 100 also has a second compressive layer 122 extending from second surface 112 to a second depth of layer d2. Glass article also has a central region 130 that extends from d1 to d2. Central region 130 is under a tensile stress or central tension (CT), which balances or counteracts the compressive stresses of layers 120 and 122. The depth d1, d2 of first and second compressive layers 120, 122 protects the glass article 100 from the propagation of flaws introduced by sharp impact to first and second surfaces 110, 112 of glass article 100, while the compressive stress minimizes the likelihood of a flaw penetrating through the depth d1, d2 of first and second compressive layers 120, 122.

The high amounts of Al2O3 (12 mol % to 22 mol %) and Na2O (11 mol % to 21 mol %) in the glasses described herein enable the glass to be ion exchanged to achieve high levels of compressive stress CS. In some embodiments, the glasses described herein may be ion exchanged to produce compressive layers 120, 122 having a compressive stress CS of at least about 500 MPa; in some embodiments, at least about 700 MPa; in other embodiments, at least about 800 MPa; in other embodiments, at least about 900 MPa; in other embodiments, at least about 1000 MPa; and, in still other embodiments, at least about 1100 MPa. In some embodiments, the glasses described herein may be ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 52 μm within eight hours ion exchange time. In other embodiments, the glasses described herein may be ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 40 μm within four hours ion exchange time. In still other embodiments, the glasses described herein may be ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 30 μm within two hours ion exchange time. In some embodiments, the compressive stress is in a range from about 700 MPa to about 1200 MPa; in other embodiments, from about 800 MPa to about 1200 MPa; in still other embodiments, from about 900 MPa to about 1200 MPa.

When ion exchanged, the glasses described herein exhibit intrinsic damage resistance, as reflected by Vickers indentation threshold measurements, described hereinabove. When the value of the expression B2O3−(Na2O+K2O−Al2O3) is high (>1 mol %) and the value of (Na2O+K2O−Al2O3) is low 0.5 mol %), the lass exhibits high levels of damage resistance. In some embodiments, the ion exchanged glass has a Vickers crack indentation threshold of at least about 9.5 kgf; in some embodiments, at least about 17.5 kgf; in other embodiments, at least about 22.5 kgf; in other embodiments, at least about 32.5 kgf; and, in still other embodiments, at least about 40 kgf.

High rates of ion exchange are attributable to the combination of several compositional factors, including high concentrations of Al2O3 (12 mol % to 22 mol %) and RAlO4 (24 mol % to 45 mol %); a non-zero K2O concentration (up to about 0.95 mol % K2O); and low concentration (0 mol % to 5 mol %) of divalent metal oxides RO (R′ is at least one of Ca. Mg, and Zn). In some embodiments, the glasses described herein are ion exchangeable at a rate to achieve a CS·DOL product of at least 44000 MPa·μm within less than about 8 hours.

The glasses described herein, in some embodiments, have a liquidus viscosity of at least about 100 kiloPoise (kpoise), which enables them to be made using down-draw techniques known in the art, such as fusion draw and slot draw methods. In particular, these glasses are compatible (i.e., do not substantially react with or degrade) with alumina hardware, such as isopipes) used in the fusion draw process.

In some embodiments, the glasses described herein consist essentially of or comprise: from about 50 mol % to about 72 mol % SiO2 (i.e., 50 mol %≤SiO2≤72 mol %); from about 12 mol % to about 22 mol % Al2O3 (i.e., 12 mol %≤Al2O3≤22 mol %); up to about 6.5 mol % B2O3 (i.e., 0 mol %≤B2O3≤6.5 mol %); up to about 1 mol % P2O5 (i.e., 0 mol %≤P2O5≤1 mol %); from about 11 mol % to about 21 mol % Na2O (i.e., 11 mol %≤Na2O≤21 mol %); up to about 0.95 mol % K2O (i.e., 0 mol %≤K2O≤0.95 mol %); up to about 4 mol % MgO (i.e., 0 mol %≤MgO≤4 mol %); up to about 5 mol % ZnO (i.e., 0 mol %≤ZnO≤4 mol %); and up to about 2 mol % CaO (i.e., 0 mol %≤CaO≤2 mol %). In some embodiments, Na2O+K2O−Al2O3≤2.0 mol % and, in some embodiments, B2O3−(Na2O+K2O−Al2O3)>1 mol %. In some embodiments, 24 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag. In some embodiments, 56 mol %≤SiO2+B2O3≤78 mol % and, in some embodiments, 0 mol %≤Σ[R′O]≤5 mol %, where R′ is at least one of Ca. Mg, and Zn. In some embodiments, 2 mol %≤B2O3+P2O5≤7.5 mol %. In some embodiments, the glasses described herein are substantially free of TiO2.

In certain embodiments, the glass is substantially free of, or contains 0 mol %, P2O5. The glass, in some embodiments, is substantially free of, or contains 0 mol %, Li2O. In some embodiments, the glass is substantially free of As2O3 and Sb2O5.

In some embodiments, the glass may further include at least one fining agent such as SnO2, CeO2, As2O3, Sb2O5, Cl, F, or the like. In some embodiments, the glass may include up to about 0.5 mol % SnO2 (i.e., 0 mol %≤SnO2≤0.5 mol %); up to about 0.5 mol % Sb2O5, (i.e., 0 mol %≤CeO2≤0.5 mol %); and/or up to about 0.5 mol % As2O3 (i.e., 0 mol %≤As2O3≤0.5 mol %.

In particular embodiments, the glasses consist essentially of or comprise: from about 55 mol % to about 62 mol % SiO2 (i.e., 55 mol %≤SiO2≤62 mol %); from about 16 mol % to about 20 mol % Al2O3 (i.e., 16 mol %<Al2O3≤20 mol %); from about 2 mol % to about 6.5 mol % B2O3 (i.e., 2 mol %≤B2O3≤6.5 mol %); up to about 1 mol % P2O5 (i.e., 0 mol %≤P2O5≤1 mol %); from about 14 mol % to about 18 mol % Na2O (i.e., 14 mol %≤Na2O≤18 mol %); from about 0.2 mol % to about 0.75 mol % K2O (i.e., 0.2 mol %≤K2O≤0.95 mol %); up to about 0.5 mol % MgO (i.e., 0 mol %≤MgO≤0.5 mol %); up to about 0.5 mol % ZnO (i.e., 0 mol %≤ZnO≤0.5 mol %); and up to about 0.5 mol % CaO (i.e., 0 mol %≤CaO≤0.5 mol %). In some embodiments, Na2O+K2O−Al2O3≤0.5 mol % and, in some embodiments, B2O3−(Na2O+K2O−Al2O3)>4 mol %. In some embodiments, 24 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag. In some embodiments, 56 mol %≤SiO2+B2O3≤75 mol % and, in some embodiments, 0 mol %≤Σ[R′O]≤0.5 mol %, where R′ is at least one of Ca. Mg, and Zn. In some embodiments, K2O≤0.5 (Na2O+K2O). In embodiments, the glass is substantially free, or contains 0 mol %, of TiO2. In certain embodiments, the glass is substantially free of, or contains 0 mol %, P2O5. The glass, in some embodiments, is substantially free of, or contains 0 mol %, Li2O. In other embodiments, the glass is substantially free, or contains 0 mol %, of As2O3 and Sb2O5.

In embodiments, the glass may further include at least one fining agent such as SnO2, CeO2, As2O3, Sb2O5, Cl, F, or the like. In some embodiments, the glass may include up to about 0.5 mol % SnO2 (i.e., 0 mol %≤SnO2≤0.5 mol %); up to about 0.5 mol % Sb2O5, (i.e., 0 mol %≤CeO2≤0.5 mol %); and/or up to about 0.5 mol % As2O3 (i.e., 0 mol %≤As2O3≤0.5 mol %.

In still other embodiments, the glasses described herein consist essentially of or comprise: from about 55 mol % to about 62 mol % SiO2 (i.e., 55 mol %≤SiO2≤62 mol %); from about 16 mol % to about 20 mol % Al2O3 (i.e., 16 mol %<Al2O3≤20 mol %); from about 4 mol % to about 6.5 mol % B2O3 (i.e., 4 mol %≤B2O3≤6.5 mol %); from about 14 mol % to about 18 mol % Na2O (i.e., 14 mol %≤Na2O≤18 mol %); from about 0.2 mol % to about 0.75 mol % K2O (i.e., 0.2 mol %≤K2O≤4 mol %); up to about 0.5 mol % MgO (i.e., 0 mol %≤MgO≤0.5 mol %); up to about 0.5 mol % ZnO (i.e., 0 mol %≤ZnO≤0.5 mol %); up to about 0.5 mol % CaO (i.e., 0 mol %≤CaO≤0.5 mol %); and are substantially free of, or contain 0 mol %, P2O5. In some embodiments, Na2O+K2O−Al2O3≤0.5 mol % and, in some embodiments, B2O3−(Na2O+K2O−Al2O3)>4 mol %. In some embodiments, 28 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag. In some embodiments, 56 mol %≤SiO2+B2O3≤70 mol % and, in some embodiments, 0 mol %≤Σ[R′O]≤0.5 mol %, where R′ is at least one of Ca. Mg, and Zn. In some embodiments, K2O≤0.25 (Na2O+K2O). In embodiments, the glass is substantially free of TiO2. In certain embodiments, the glass is substantially free of, or contains 0 mol %, Li2O. In some embodiments, the glass is substantially free of, or contains 0 mol %, As2O3 and Sb2O5.

In some embodiments, the glass may further include at least one fining agent such as SnO2, CeO2, As2O3, Sb2O5, Cl, F, or the like. In some embodiments, the glass may include up to about 0.5 mol % SnO2 (i.e., 0 mol %≤SnO2≤0.5 mol %); up to about 0.5 mol % Sb2O5, (i.e., 0 mol %≤CeO2≤0.5 mol %); and/or up to about 0.5 mol % As2O3 (i.e., 0 mol %≤As2O3≤0.5 mol %.

Compositions and non-limiting examples of these glasses that comprise P2O5 are listed in Table 1. Compositions and non-limiting examples of these glasses that are substantially free of P2O5 are listed in Table 2. Each of the oxide components of these glasses serves a function. Silica (SiO2), for example, is the primary glass forming oxide, and forms the network backbone for the molten glass. Pure SiO2 has a low CTE and is alkali metal-free. Due to its extremely high melting temperature, however, pure SiO2 is incompatible with the fusion draw process. The viscosity curve is also much too high to match with any core glass in a laminate structure. In some embodiments, the amount of SiO2 in the glasses described herein ranges from about 50 mol % to about 72 mol %. In other embodiments, the SiO2 concentration ranges from about 55 mol % to about 62 mol %.

In addition to silica, the glasses described herein comprise the network formers Al2O3 and B2O3 to achieve stable glass formation, low CTE, low Young's modulus, low shear modulus, and to facilitate melting and/or forming. By mixing all three of these network formers in appropriate concentrations, it is possible achieve stable bulk glass formation while minimizing the need for network modifiers such as alkali or alkaline earth oxides, which act to increase CTE and modulus. Like SiO2, Al2O3 contributes to the rigidity to the glass network. Alumina may exist in the glass in either fourfold or fivefold coordination. In some embodiments, the glasses described herein comprise from about 12 mol % to about 22 mol % Al2O3 and, in particular embodiments, from about 16 mol % to about 20 mol % Al2O3.

Boron oxide (B2O3) is also a glass-forming oxide that is used to reduce viscosity and thus improve the ability to melt and form glass. B2O3 may exist in either threefold or fourfold coordination in the glass network. Threefold coordinated B2O3 is the most effective oxide for reducing the Young's modulus and shear modulus, thus improving the intrinsic damage resistance of the glass. Accordingly, the glasses described herein, in some embodiments, comprise from about 0 mol % up to about 6.5 mol % B2O3, in other embodiments, from about 2 mol % to about 6.5 mol % B2O3, and in still other embodiments, from about 4 mol % to about 6.0 mol % B2O3. In some embodiments, 56 mol %≤SiO2+B2O3≤78 mol % and, in other embodiments, 66 mol %≤SiO2+B2O3≤75 mol %. In certain embodiments, B2O3≤Al2O3.

The alkali oxides Na2O and K2O are used to achieve chemical strengthening of the glass by ion exchange. In some embodiments, the glass includes Na2O, which can be exchanged for potassium in a salt bath containing, for example, KNO3. In some embodiments, 0 mol %≤K2O≤0.95 mol %, and, in certain embodiments, 0.2 mol %≤K2O≤0.75 mol %. In some embodiments, 11 mol %≤Na2O≤21 mol %, in other embodiments, 14 mol %≤Na2O≤18 mol % In other embodiments, 1 mol %≤Li2O≤15 mol %, and, in certain embodiments, 6 mol %≤Li20≤13 mol %. The glasses described herein are substantially free of Li2O, or comprise 0 mol % Li2O. %). In some embodiments, Na2O+K2O−Al2O3 2.0 mol % and, in other embodiments, Na2O+K2O−Al2O3≤0.5 mol %. In some embodiments, B2O3−(Na2O+K2O−Al2O3)>1 mol % and, in other embodiments, B2O3−(Na2O+K2O−Al2O3)>4 mol %. In some embodiments, 24 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, and, in other embodiments, 24 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag.

Like B2O3, alkaline earth oxides such as MgO and CaO, and other divalent oxides such as ZnO also improve the melting behavior of the glass. However, they also act to increase CTE and Young's and shear moduli. In some embodiments, the glasses described herein comprise up to about 4 mol % MgO, up to about 1 mol % CaO, and up to about 4 mol % ZnO. In other embodiments, these glasses may comprise up to about 0.5 mol % MgO, up to about 0.5 mol % CaO, and up to about 0.5 mol % ZnO. In some embodiments, 0 mol %≤Σ[R′O]≤5 mol % and, in other embodiments, 0 mol %≤Σ[R′O]≤0.5 mol %, where R′ is at least one of Ca. Mg, and Zn.

TiO2 is commonly used to lower the coefficient of thermal expansion is glasses. However, TiO2 may negatively impact the light transmitting properties of the glass, such as by absorbing and transmitting light that otherwise would not be absorbed or transmitted by the glass. Accordingly, in embodiments, the glass is substantially free of, or contains 0 mol %, TiO2.

In order to ensure that the vast majority of B2O3 in the glass is in the threefold coordinated state and thereby obtain a high native scratch resistance, Na2O+K2O−Al2O3≤2.0 mol % and, in some embodiments, Na2O+K2O−Al2O3≤0.5 mol %. In some embodiments, B2O3−(Na2O+K2O−Al2O3)>1 mol % and, and, in some embodiments, B2O3−(Na2O+K2O−Al2O3)>4 mol %.

The glass may also include at least one fining agent such as SnO2, CeO2, As2O3, Sb2O5, Cl, F, or the like in small concentrations to aid in the elimination of gaseous inclusions during melting. In some embodiments, the glass may comprise up to about 0.5 mol % SnO2, up to about 0.5 mol % As2O3, and/or up to about 0.5 mol % Sb2O3. However, As2O3 and Sb2O3 may have adverse affects on the environment and health. Therefore, in some embodiments, the glass is substantially free of, or contains 0 mol %, As2O3 and Sb2O5.

Non-limiting examples of compositions and their selected physical properties (strain, anneal and softening points, density, CTE, liquidus temperatures, modulus, refractive index, and stress optical coefficient (SOC)) of the glasses described herein comprising up to about 1 mol % P2O5 are listed in Table 1. Non-limiting examples of compositions and their selected physical properties of the glasses described herein that do not contain P2O5 are listed in Table 2.

In another aspect, a method of ion exchanging the alkali aluminosilicate glasses described herein above is provided. The method comprises ion exchanging the glass at temperatures of up to about 410° C. for up to about eight hours in an ion exchange bath comprising a potassium salt to form a compressive layer having a compressive stress CS of at least 500 MPa and extending from a surface to a depth of layer DOL. In some embodiments, the glasses described herein may be ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 52 μm within eight hours ion exchange time. In other embodiments, the glasses described herein may be ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 40 μm within four hours ion exchange time. In still other embodiments, the glasses described herein may be ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 30 μm within two hours ion exchange time. In some embodiments, CS·DOL=44000 MPa·μm.


TABLE 1
Compositions and selected physical properties of the glasses described
herein comprising up to about 1 mol % P2O5.
Glass (mol %)
A
B
C
D
E
SiO2
63.53
64.65
63.58
64.55
64.63
Al2O3
14.98
14
14
13.97
14.38
B2O3
6.046
6.937
6.983
7.015
6.016
Na2O
13.76
12.74
13.75
13.73
13.76
K2O
0.503
0.496
0.501
0.005
0.501
MgO
0.039
0.037
0.037
0.042
0.02
CaO
0.07
0.07
0.068
0.068
0.064
ZnO
0
0
0
0
0
P2O5
0.97
0.97
0.97
0.51
0.497
SnO2
0.1
0.1
0.101
0.099
0.099
[Na2O] + [K2O]− [Al2O3]
−0.71
−0.76
0.242
−0.23
−0.12
[B2O3]− ([Na2O] + [K2O]− [Al2O3])
6.76
7.701
6.741
7.244
6.135
Strain Pt. (° C.)
590
575
559
576
570
Anneal Pt. (° C.)
649
634
613
633
629
Soft Pt. (° C.)
935
906
879
914
919
CTE (107° C.−1)
80.6
77.3
80.5
78
80.3
Density (g/cm3)
2.374
2.361
2.374
2.367
2.378
E Mod (Mpsi)
9.26
9.14
9.239
9.165
9.357
G Mod (Mpsi)
3.816
3.764
3.788
3.778
3.864
ν (Poisson's ratio)
0.213
0.214
0.219
0.213
0.211
Indentation Threshold (kgf)
30
27.5
25
30
32.5
CS1 (MPa)
803.4
724.9
733.1
782.1
792.5
DOL1 (μm)
70.09
64.23
60.75
58.71
62.94
1Glass fusion drawn/fictivated and ion exchanged at 410° C. for 8 hours in KNO3 molten salt bath.


TABLE 2
Compositions and selected physical properties of the glasses described herein that do not contain P2O5.
Glass (mol %)
1
2
3
4
5
6
SiO2
64.05
63.98
64.02
63.96
61.44
62.02
Al2O3
13.59
16.35
15.86
16.41
16.87
16.53
B2O3
8.11
4.00
3.98
2.13
5.40
4.95
Na2O
13.54
14.40
14.87
16.25
15.59
15.99
K2O
0.51
1.02
1.02
1.01
0.51
0.51
MgO
0.02
0.02
0.02
0.02
0.02
0.01
CaO
0.07
0.13
0.13
0.13
0.07
0.07
ZnO
P2O5
SnO2
0.10
0.10
0.10
0.10
0.09
0.10
[Na2O] + [K2O]− [Al2O3]
0.46
−0.93
0.02
0.85
−0.77
−0.04
[B2O3]− ([Na2O] +
7.65
4.94
3.96
1.28
6.17
4.99
[K2O]− [Al2O3])
Strain Pt. (° C.)
542
623
599
620
600.8
591.3
Anneal Pt. (° C.)
594
684
657
679
659.7
649.2
Soft Pt. (° C.)
856
980
950
969
949
CTE (107° C.−1)
79
84.6
86.3
89.3
Density (g/cm3)
2.368
2.406
2.408
2.433
2.398
E Mod (Mpsi)
9.332
9.871
9.879
G Mod (Mpsi)
3.807
4.044
4.042
ν (Poisson's ratio)
0.226
0.221
0.222
Indentation Threshold (kgf)
40
17.5
17.5
11.5
42.5
27.5
CS (MPa)1
945.98
934.91
936.13
CS (MPa)1 (SOC corrected)
904.22
950.37
DOL (μm)1
75.87
74.66
73.94
73.65
72.07
CS (MPa)2
598.55
1025.88
1031.55
1048.43
CS (MPa)2 (SOC corrected)
978.33
1069.76
DOL (μm)2
45.97
56.41
57.43
60.06
59.41
56.14
Glass (mol %)
7
8
9
10
11
12
SiO2
58.05
59.94
62.02
61.92
64.41
66.99
Al2O3
17.66
16.49
16.53
16.85
14.95
13.31
B2O3
6.08
6.63
5.03
5.04
6.04
5.79
Na2O
17.49
16.20
15.91
15.67
13.89
13.74
K2O
0.50
0.51
0.51
0.51
0.52
0.01
MgO
0.02
0.02
0.01
0.02
0.02
0.02
CaO
0.08
0.08
0.07
0.08
0.06
0.02
ZnO
P2O5
SnO2
0.10
0.10
0.09
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.33
0.22
−0.11
−0.66
−0.55
0.44
[B2O3]− ([Na2O] +
5.75
6.41
5.14
5.70
6.59
5.35
[K2O]− [Al2O3])
Strain Pt. (° C.)
594
588
591
602.6
603
594
Anneal Pt. (° C.)
648
644
649.4
661.4
662
653
Soft Pt. (° C.)
907
905
946
942
CTE (107° C.−1)
90.8
87.4
80.4
75.3
Density (g/cm3)
2.412
2.399
2.381
2.365
E Mod (Mpsi)
9.52
9.418
9.438
9.309
G Mod (Mpsi)
3.877
3.83
3.865
3.848
ν (Poisson's ratio)
0.228
0.229
0.221
0.21
Indentation Threshold (kgf)
22.5
32.5
27.5
35
50
32.5
CS (MPa)1
982.26
887.12
836.34
770.78
CS (MPa)1 (SOC corrected)
838.10
951.64
992.14
786.73
709.43
DOL (μm)1
71.23
70.91
70.87
69.64
69.48
69.26
CS (MPa)2
1134.74
1090.05
940.56
920.95
CS (MPa)2 (SOC corrected)
1029.81
1033.00
884.78
847.65
DOL (μm)2
53.67
51.20
58.58
53.11
50.07
Glass (mol %)
13
14
15
16
17
18
SiO2
67.14
67.11
60.31
61.66
67.08
66.96
Al2O3
13.21
13.23
16.46
16.22
13.23
13.33
B2O3
5.77
5.76
6.50
5.09
5.77
5.79
Na2O
13.42
13.42
16.04
16.33
13.46
13.75
K2O
0.26
0.26
0.51
0.51
0.26
0.01
MgO
0.02
0.02
0.02
0.02
0.02
0.02
CaO
0.05
0.05
0.07
0.07
0.05
0.02
ZnO
P2O5
SnO2
0.10
0.10
0.09
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.47
0.45
0.09
0.62
0.49
0.43
[B2O3]− ([Na2O] +
5.30
5.30
6.41
4.46
5.27
5.36
[K2O]− [Al2O3])
Strain Pt. (° C.)
593
592
569.4
569.5
591
594
Anneal Pt. (° C.)
651
650
624.4
622.9
649
652
Soft Pt. (° C.)
931
938
935
942
CTE (107° C.−1)
76.8
76.5
76.3
75.6
Density (g/cm3)
2.369
2.37
2.396
2.408
2.368
2.369
E Mod (Mpsi)
9.412
9.453
9.502
9.34
G Mod (Mpsi)
3.873
3.865
3.845
3.849
ν (Poisson's ratio)
0.215
0.223
0.236
0.213
Indentation Threshold (kgf)
27.5
>25
47.5
17.5
17.5
27.5
CS (MPa)1
763.00
767.19
757.38
783.96
CS (MPa)1 (SOC corrected)
707.18
711.69
833.11
885.94
701.16
726.19
DOL (μm)1
69.24
69.17
68.85
68.79
68.70
67.82
CS (MPa)2
901.59
901.02
899.76
928.71
CS (MPa)2 (SOC corrected)
835.64
835.84
958.06
1000.30
832.97
860.27
DOL (μm)2
49.25
50.41
54.45
50.89
52.33
48.49
Glass (mol %)
19
20
21
22
23
24
SiO2
62.38
67.14
65.66
62.86
57.41
56.99
Al2O3
15.71
13.23
13.71
15.30
19.20
19.12
B2O3
5.05
5.72
6.26
5.14
5.33
5.44
Na2O
16.17
13.42
13.91
16.01
17.65
17.97
K2O
0.51
0.26
0.26
0.51
0.25
0.26
MgO
0.02
0.02
0.02
0.02
0.02
0.05
CaO
0.06
0.05
0.05
0.06
0.04
0.06
ZnO
0.00
P2O5
SnO2
0.10
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.97
0.45
0.46
1.22
−1.30
−0.89
[B2O3]− ([Na2O] +
4.08
5.26
5.80
3.92
6.63
6.33
[K2O]− [Al2O3])
Strain Pt. (° C.)
565
590
586
559.6
627
623
Anneal Pt. (° C.)
617.1
649
644
610.4
683
678
Soft Pt. (° C.)
883.5
936
928
941
928
CTE (107° C.−1)
86.2
76
77.6
88.2
92.6
Density (g/cm3)
2.408
2.367
2.37
2.421
2.426
E Mod (Mpsi)
9.421
9.35
9.705
9.603
G Mod (Mpsi)
3.858
3.828
3.967
3.942
ν (Poisson's ratio)
0.221
0.221
0.223
0.218
Indentation Threshold (kgf)
10
32.5
22.5
10
35
50
CS (MPa)1
770.06
775.41
1049.21
1009.69
CS (MPa)1 (SOC corrected)
819.65
712.06
715.97
787.79
1029.47
999.95
DOL (μm)1
67.18
66.93
66.93
66.49
66.43
66.37
CS (MPa)2
893.63
913.97
1211.52
1153.86
CS (MPa) (SOC corrected)
951.03
826.33
843.91
931.00
1188.72
1142.72
DOL (μm)2
53.03
52.27
50.32
50.09
49.38
50.35
Glass (mol %)
25
26
27
28
29
30
SiO2
65.34
65.86
64.11
62.89
64.06
65.45
Al2O3
13.84
13.08
14.01
14.67
14.86
13.85
B2O3
6.41
6.96
7.15
6.90
6.01
6.29
Na2O
14.24
11.72
13.03
14.31
13.81
14.23
K2O
0.01
2.01
1.50
0.99
1.01
0.01
MgO
0.02
0.02
0.01
0.02
0.02
0.02
CaO
0.02
0.24
0.07
0.11
0.12
0.02
ZnO
P2O5
SnO2
0.10
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.41
0.66
0.53
0.62
−0.03
0.38
[B2O3]− ([Na2O] +
6.00
6.30
6.62
6.28
6.05
5.91
[K2O]− [Al2O3])
Strain Pt. (° C.)
589
540
560
548
570
590
Anneal Pt. (° C.)
646
592
613
599.9
627
646
Soft Pt. (° C.)
928
851
810
920
927
CTE (107° C.−1)
77.8
81.9
82.7
82
78.5
Density (g/cm3)
2.371
2.379
2.382
2.385
2.388
2.372
E Mod (Mpsi)
9.255
9.653
9.467
9.635
9.286
G Mod (Mpsi)
3.812
3.936
3.874
3.913
3.846
v (Poisson's ratio)
0.214
0.226
0.222
0.231
0.207
Indentation Threshold (kgf)
27.5
17.5
47.5
37.5
47.5
37.5
CS (MPa)1
792.17
644.93
731.96
844.33
808.31
CS (MPa)1 (SOC corrected)
728.06
688.85
734.27
746.13
DOL (μm)1
66.10
65.87
65.35
65.12
65.00
64.89
CS (MPa)2
920.31
738.35
842.29
935.14
960.00
CS (MPa)2 (SOC corrected)
845.84
792.68
844.88
886.15
DOL (μm)2
50.82
52.26
49.62
50.30
49.86
47.59
Glass (mol %)
31
32
33
34
35
36
SiO2
64.19
57.07
66.06
65.84
62.87
63.72
Al2O3
15.36
18.78
13.22
13.18
14.96
14.96
B2O3
5.95
5.31
6.98
6.99
6.96
7.05
Na2O
13.22
18.35
13.04
12.73
14.52
13.57
K2O
1.02
0.26
0.51
1.01
0.51
0.50
MgO
0.02
0.05
0.02
0.02
0.02
0.02
CaO
0.13
0.05
0.07
0.12
0.07
0.06
ZnO
0.00
P2O5
SnO2
0.10
0.10
0.10
0.10
0.09
0.10
[Na2O] + [K2O]− [Al2O3]
−1.12
−0.17
0.33
0.56
0.07
−0.88
[B2O3]− ([Na2O] +
7.07
5.48
6.65
6.43
6.88
7.93
[K2O]− [Al2O3])
Strain Pt. (° C.)
586
612
550
545
559.9
592
Anneal Pt. (° C.)
646
667
604
598
615.7
651
Soft Pt. (° C.)
943
921
869
866
933
CTE (107° C.−1)
77.7
94.2
78.4
80.1
78.4
Density (g/cm3)
2.386
2.43
2.372
2.377
2.376
E Mod (Mpsi)
9.572
9.728
9.461
9.55
9.268
G Mod (Mpsi)
3.938
3.928
3.873
3.883
3.806
ν (Poisson's ratio)
0.215
0.238
0.222
0.23
0.218
Indentation Threshold (kgf)
42.5
30
17.5
17.5
42.5
50
CS (MPa)1
851.23
954.36
692.07
701.60
809.55
CS (MPa)1 (SOC corrected)
941.04
779.63
759.29
DOL (μm)1
64.72
63.88
63.57
63.16
62.91
62.89
CS (MPa)2
920.57
1152.17
814.65
810.37
919.37
CS (MPa)2 (SOC corrected)
1136.09
885.76
862.29
DOL (μm)2
45.33
51.17
48.31
46.04
47.18
47.57
Glass (mol %)
37
38
39
40
41
42
SiO2
65.35
63.07
65.83
62.85
65.71
65.86
Al2O3
14.00
15.40
13.59
15.42
13.57
13.56
B2O3
6.11
6.67
5.12
7.02
5.74
5.25
Na2O
13.84
14.18
14.45
14.02
13.97
14.32
K2O
0.51
0.51
0.10
0.51
0.10
0.10
MgO
0.01
0.02
0.77
0.02
0.76
0.76
CaO
0.06
0.07
0.05
0.07
0.04
0.04
ZnO
0.00
0.00
0.00
P2O5
SnO2
0.10
0.09
0.10
0.09
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.34
−0.71
0.96
−0.90
0.51
0.86
[B2O3]− ([Na2O] +
5.76
7.38
4.16
7.92
5.24
4.40
[K2O]− [Al2O3])
Strain Pt. (° C.)
580
573.1
584
575.1
586
584
Anneal Pt. (° C.)
636
631.6
638
633.3
641
639
Soft Pt. (° C.)
908
907
915
911
CTE (107° C.−1)
79.5
78.5
76.4
77.7
Density (g/cm3)
2.382
2.39
2.373
2.379
2.388
E Mod (Mpsi)
9.614
9.704
9.558
9.609
G Mod (Mpsi)
3.887
4.007
3.912
3.98
ν (Poisson's ratio)
0.237
0.211
0.222
0.207
Indentation Threshold (kgf)
32.5
47.5
27.5
47.5
32.5
40
CS (MPa)1
796.55
809.68
803.88
811.46
CS (MPa)1 (SOC corrected)
749.86
780.71
784.04
800.99
764.68
778.88
DOL (μm)1
62.80
62.50
62.42
62.41
62.01
61.95
CS (MPa)2
911.57
1000.28
946.44
985.28
CS (MPa)2 (SOC corrected)
858.13
881.96
968.60
897.79
900.29
945.72
DOL (μm)2
47.90
47.00
44.25
46.57
49.35
45.17
Glass (mol %)
43
44
45
46
47
48
SiO2
64.57
64.78
50.50
65.61
65.52
65.74
Al2O3
13.85
13.66
21.09
13.58
13.59
13.57
B2O3
7.04
7.03
7.04
5.59
5.62
5.63
Na2O
13.84
13.83
20.12
14.21
14.25
14.05
K2O
0.51
0.51
0.98
0.10
0.10
0.10
MgO
0.02
0.02
0.02
0.76
0.77
0.77
CaO
0.07
0.07
0.13
0.04
0.04
0.04
ZnO
0.00
0.00
0.00
P2O5
SnO2
0.10
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.50
0.68
0.01
0.73
0.76
0.58
[B2O3]− ([Na2O] +
6.54
6.35
7.03
4.86
4.85
5.05
[K2O]− [Al2O3])
Strain Pt. (° C.)
550
549.5
569
581
581
584
Anneal Pt. (° C.)
603
601.5
620
637
635
639
Soft Pt. (° C.)
867.5
864
906
906
913
CTE (107° C.−1)
77.7
79.3
100.9
77.6
76.7
76.6
Density (g/cm3)
2.38
2.373
2.444
2.385
2.384
2.382
E Mod (Mpsi)
9.506
9.669
9.663
9.608
9.651
G Mod (Mpsi)
3.896
3.906
3.948
3.942
3.92
ν (Poisson's ratio)
0.22
0.238
0.224
0.219
0.231
Indentation Threshold (kgf)
37.5
37.5
12.5
37.5
32.5
40
CS (MPa)1
741.35
987.93
802.89
801.35
810.58
CS (MPa)1 (SOC corrected)
689.48
976.87
766.03
767.10
763.97
DOL (μm)1
61.64
61.50
61.36
61.31
61.11
60.80
CS (MPa)2
1137.60
983.29
965.09
971.14
CS (MPa)2 (SOC corrected)
775.20
1124.87
938.15
923.84
915.30
DOL (μm)2
50.44
45.76
44.62
46.39
46.48
Glass (mol %)
49
50
51
52
53
54
SiO2
65.45
56.88
64.49
59.77
64.44
56.55
Al2O3
13.98
18.36
14.18
16.19
13.99
18.28
B2O3
7.06
5.41
7.02
7.04
7.04
6.55
Na2O
12.81
18.88
13.61
16.28
13.83
17.37
K2O
0.50
0.26
0.51
0.51
0.51
0.99
MgO
0.01
0.04
0.01
0.02
0.01
0.02
CaO
0.06
0.06
0.06
0.07
0.06
0.12
ZnO
0.00
0.00
P2O5
SnO2
0.10
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
−0.67
0.77
−0.06
0.60
0.35
0.07
[B2O3]− ([Na2O] +
7.73
4.64
7.08
6.44
6.69
6.47
[K2O]− [Al2O3])
Strain Pt. (° C.)
588
586
578
552.1
571
562
Anneal Pt. (° C.)
648
640
634
602.8
628
616
Soft Pt. (° C.)
943
892
914
858.6
887
867
CTE (107° C.−1)
75.4
97.2
79.5
79
93.7
Density (g/cm3)
2.363
2.435
2.372
2.399
2.375
2.42
E Mod (Mpsi)
9.182
9.82
9.297
9.333
9.547
G Mod (Mpsi)
3.83
3.975
3.825
3.835
3.871
ν (Poisson's ratio)
0.199
0.235
0.215
0.217
0.233
Indentation Threshold (kgf)
20
12.5
37.5
42.5
37.5
27.5
CS (MPa)1
754.06
907.31
795.79
734.76
923.25
CS (MPa)1 (SOC corrected)
691.64
904.75
741.57
789.38
679.62
899.49
DOL (μm)1
60.63
60.58
60.38
60.07
59.90
59.68
CS (MPa)2
865.34
1077.34
906.33
880.03
1042.81
CS (MPa)2 (SOC corrected)
793.71
1074.30
844.58
930.97
813.99
1015.97
DOL (μm)2
45.17
46.13
46.55
44.63
46.09
45.26
Glass (mol %)
55
56
57
58
59
60
SiO2
57.32
63.79
67.18
64.29
55.42
56.81
Al2O3
19.10
14.44
12.78
13.95
18.46
18.34
B2O3
4.37
5.66
5.65
6.94
7.24
5.64
Na2O
17.73
15.42
13.70
14.13
18.45
18.74
K2O
0.25
0.50
0.00
0.51
0.25
0.25
MgO
1.06
0.01
0.54
0.02
0.01
0.04
CaO
0.05
0.06
0.02
0.07
0.05
0.06
ZnO
0.00
0.00
P2O5
SnO2
0.10
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
−1.11
1.49
0.92
0.68
0.24
0.66
[B2O3]− ([Na2O] +
5.48
4.17
4.73
6.25
7.00
4.98
[K2O]− [Al2O3])
Strain Pt. (° C.)
625
553.3
579
550.4
569
577
Anneal Pt. (° C.)
678
602.1
633
602.9
621
630
Soft Pt. (° C.)
934
904
870.7
858
893
CTE (107° C.−1)
88.7
75.5
79.4
94.3
95.6
Density (g/cm3)
2.438
2.376
2.375
2.424
2.434
E Mod (Mpsi)
9.855
9.547
9.57
9.703
G Mod (Mpsi)
4.018
3.925
3.864
3.98
ν (Poisson's ratio)
0.227
0.216
0.238
0.219
Indentation Threshold (kgf)
15
10
17.5
37.5
32.5
12.5
CS (MPa)1
1087.72
747.21
936.43
913.84
CS (MPa)1 (SOC corrected)
1097.38
745.92
718.15
910.69
DOL (μm)1
59.34
59.32
58.98
58.69
58.60
58.58
CS (MPa)2
1214.15
910.00
1081.85
CS (MPa)2 (SOC corrected)
1224.94
899.51
805.33
DOL (μm)2
45.38
44.62
42.89
47.80
45.12
Glass (mol %)
61
62
63
64
65
66
SiO2
64.36
61.56
63.81
64.14
64.42
57.15
Al2O3
14.49
15.77
14.64
14.77
13.94
18.43
B2O3
7.10
6.04
5.13
7.25
8.06
5.27
Na2O
13.85
15.91
15.74
13.51
12.87
18.97
K2O
0.01
0.52
0.50
0.20
0.52
0.01
MgO
0.01
0.02
0.02
0.01
0.01
0.05
CaO
0.06
0.08
0.06
0.03
0.06
0.02
ZnO
0.00
P2O5
SnO2
0.10
0.10
0.10
0.07
0.10
0.09
[Na2O] + [K2O]− [Al2O3]
−0.63
0.66
1.60
−1.06
−0.55
0.55
[B2O3]− ([Na2O] +
7.73
5.38
3.53
8.31
8.61
4.72
[K2O]− [Al2O3])
Strain Pt. (° C.)
591
565
553.8
590
574
580.2195
Anneal Pt. (° C.)
650
617
602.8
648
631
633.1365
Soft Pt. (° C.)
934
888
850
934
916
CTE (107° C.−1)
76.6
88
75.4
75.2
Density (g/cm3)
2.37
2.411
2.408
2.368
2.36
E Mod (Mpsi)
9.315
9.563
9.257
9.148
G Mod (Mpsi)
3.758
3.919
3.803
3.742
ν (Poisson's ratio)
0.239
0.22
0.217
0.222
Indentation Threshold (kgf)
42.5
12.5
10
37.5
20
12.5
CS (MPa)1
807.46
926.79
790.43
743.00
971.44
CS (MPa)1 (SOC corrected)
731.13
758.52
718.78
660.54
965.67
DOL (μm)1
58.50
58.25
57.92
57.90
57.68
57.60
CS (MPa)2
917.91
1054.95
930.21
849.33
1097.45
CS (MPa)2 (SOC corrected)
831.14
893.72
845.89
755.07
1090.93
DOL (μm)2
43.65
44.97
46.87
43.69
43.40
45.43
Glass (mol %)
67
68
69
70
71
72
SiO2
56.23
64.65
62.83
59.76
58.19
56.21
Al2O3
17.64
13.94
14.92
17.11
17.20
18.31
B2O3
8.05
6.98
6.94
5.40
7.06
6.14
Na2O
16.78
14.20
14.63
17.54
16.29
18.87
K2O
0.99
0.10
0.51
0.02
0.99
0.26
MgO
0.05
0.01
0.01
0.05
0.02
0.05
CaO
0.14
0.02
0.06
0.03
0.12
0.06
ZnO
0.00
0.00
P2O5
SnO2
0.10
0.07
0.09
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.13
0.36
0.22
0.45
0.08
0.83
[B2O3]− ([Na2O] +
7.92
6.62
6.72
4.95
6.98
5.31
[K2O]− [Al2O3])
Strain Pt. (° C.)
557
571
558.9
579.1148
557
572
Anneal Pt. (° C.)
608
622
613.1
631.8197
610
622
Soft Pt. (° C.)
850
885
866
864
CTE (107° C.−1)
92
79.7
90.5
95.1
Density (g/cm3)
2.411
2.375
2.41
2.432
E Mod (Mpsi)
9.405
9.368
9.489
9.695
G Mod (Mpsi)
3.83
3.814
3.877
3.946
ν (Poisson's ratio)
0.228
0.228
0.224
0.228
Indentation Threshold (kgf)
25
42.5
37.5
27.5
40
15
CS (MPa)1
859.86
804.16
929.92
885.30
905.74
CS (MPa)1 (SOC corrected)
819.03
798.84
914.11
848.48
889.52
DOL (μm)1
57.60
57.38
57.26
57.20
57.11
56.82
CS (MPa)2
1035.22
950.12
1059.78
989.53
1074.72
CS (MPa)2 (SOC corrected)
986.07
902.29
1041.76
948.37
1055.47
DOL (μm)2
44.40
44.00
42.70
45.24
47.57
44.47
Glass (mol %)
73
74
75
76
77
78
SiO2
65.76
64.18
64.53
65.77
57.42
61.99
Al2O3
13.87
14.01
13.99
13.21
18.59
14.65
B2O3
5.15
6.23
6.60
7.04
5.35
6.05
Na2O
13.91
13.90
13.71
13.84
17.17
14.67
K2O
0.11
1.49
0.50
0.01
0.26
0.52
MgO
1.08
0.01
0.49
0.01
1.06
0.02
CaO
0.03
0.06
0.06
0.01
0.05
0.08
ZnO
0.00
P2O5
SnO2
0.07
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.15
1.38
0.22
0.65
−1.16
0.55
[B2O3]− ([Na2O] +
5.00
4.86
6.38
6.40
6.51
5.50
[K2O]− [Al2O3])
Strain Pt. (° C.)
589
557
570
553
607
610
Anneal Pt. (° C.)
644
607
623
606
661
666
Soft Pt. (° C.)
918
847
890
873
917
919
CTE (107° C.−1)
77.2
84.2
80.4
77.2
86.8
80.5
Density (g/cm3)
2.389
2.402
2.383
2.375
2.429
2.44
E Mod (Mpsi)
9.675
9.809
9.457
9.477
10.009
9.805
G Mod (Mpsi)
3.993
4.044
3.891
3.87
4.1
3.983
ν (Poisson's ratio)
0.212
0.213
0.215
0.225
0.221
0.231
Indentation Threshold (kgf)
50
27.5
32.5
22.5
>25
13.75
CS (MPa)1
827.18
722.71
765.12
735.80
1042.17
928.11
CS (MPa)1 (SOC corrected)
789.68
701.96
718.79
1030.82
DOL (μm)1
56.82
56.75
56.73
56.65
56.63
56.53
CS (MPa)2
978.88
863.59
897.56
843.06
1188.56
1121.22
CS (MPa)2 (SOC corrected)
934.50
838.80
843.20
1175.63
DOL (μm)2
42.65
46.22
44.17
42.42
43.49
41.84
Glass (mol %)
79
80
81
82
83
84
SiO2
54.37
62.36
64.29
60.92
60.08
64.56
Al2O3
19.19
15.59
13.95
16.47
16.62
13.90
B2O3
6.98
5.79
7.65
5.83
6.34
7.03
Na2O
18.19
16.07
13.90
16.40
16.80
14.31
K2O
0.99
0.03
0.01
0.07
0.07
0.01
MgO
0.02
0.04
0.01
0.29
0.08
0.01
CaO
0.12
0.02
0.06
0.03
0.03
0.06
ZnO
P2O5
SnO2
0.10
0.10
0.10
0.08
0.08
0.10
[Na2O] + [K2O]− [Al2O3]
0.00
0.50
−0.04
0.00
0.25
0.41
[B2O3]− ([Na2O] +
6.99
5.29
7.69
5.83
6.09
6.62
[K2O]− [Al2O3])
Strain Pt. (° C.)
561
571.5756
572
573.7447
564.3761
574
Anneal Pt. (° C.)
613
623.9441
629
628.2527
618.0616
627
Soft Pt. (° C.)
862
899
891
CTE (107° C.−1)
96.2
78.5
78.9
Density (g/cm3)
2.428
2.367
2.378
E Mod (Mpsi)
9.573
9.288
9.373
G Mod (Mpsi)
3.896
3.752
3.832
ν (Poisson's ratio)
0.229
0.238
0.223
Indentation Threshold (kgf)
25
37.5
32.5
42.5
37.5
42.5
CS (MPa)1
948.59
878.64
774.46
782.10
CS (MPa)1 (SOC corrected)
929.87
852.11
696.88
903.79
853.09
723.20
DOL (μm)1
56.43
55.87
55.70
55.34
55.27
55.22
CS (MPa)2
1072.69
992.79
903.52
918.78
CS (MPa)2 (SOC corrected)
1051.53
962.82
813.01
1004.83
974.01
849.58
DOL (μm)2
47.43
43.98
42.06
43.04
44.03
41.80
Glass (mol %)
79
80
81
82
83
84
SiO2
54.37
62.36
64.29
60.92
60.08
64.56
Al2O3
19.19
15.59
13.95
16.47
16.62
13.90
B2O3
6.98
5.79
7.65
5.83
6.34
7.03
Na2O
18.19
16.07
13.90
16.40
16.80
14.31
K2O
0.99
0.03
0.01
0.07
0.07
0.01
MgO
0.02
0.04
0.01
0.29
0.08
0.01
CaO
0.12
0.02
0.06
0.03
0.03
0.06
ZnO
P2O5
SnO2
0.10
0.10
0.10
0.08
0.08
0.10
[Na2O] + [K2O]− [Al2O3]
0.00
0.50
−0.04
0.00
0.25
0.41
[B2O3]− ([Na2O] +
6.99
5.29
7.69
5.83
6.09
6.62
[K2O]− [Al2O3])
Strain Pt. (° C.)
561
571.5756
572
573.7447
564.3761
574
Anneal Pt. (° C.)
613
623.9441
629
628.2527
618.0616
627
Soft Pt. (° C.)
862
899
891
CTE (107° C.−1)
96.2
78.5
78.9
Density (g/cm3)
2.428
2.367
2.378
E Mod (Mpsi)
9.573
9.288
9.373
G Mod (Mpsi)
3.896
3.752
3.832
ν (Poisson's ratio)
0.229
0.238
0.223
Indentation Threshold (kgf)
25
37.5
32.5
42.5
37.5
42.5
CS (MPa)1
948.59
878.64
774.46
782.10
CS (MPa)1 (SOC corrected)
929.87
852.11
696.88
903.79
853.09
723.20
DOL (μm)1
56.43
55.87
55.70
55.34
55.27
55.22
CS (MPa)2
1072.69
992.79
903.52
918.78
CS (MPa)2 (SOC corrected)
1051.53
962.82
813.01
1004.83
974.01
849.58
DOL (μm)2
47.43
43.98
42.06
43.04
44.03
41.80
Glass (mol %)
85
86
87
88
89
90
SiO2
55.11
64.31
64.34
64.34
65.71
63.41
Al2O3
18.41
13.68
14.72
14.00
13.90
13.96
B2O3
7.58
7.01
6.18
5.99
5.15
7.07
Na2O
18.47
14.29
13.43
14.06
13.42
13.89
K2O
0.25
0.50
0.20
0.51
0.11
1.49
MgO
0.01
0.02
1.01
0.01
1.60
0.01
CaO
0.04
0.06
0.02
0.06
0.04
0.06
ZnO
0.00
0.00
0.91
P2O5
SnO2
0.10
0.10
0.07
0.10
0.07
0.10
[Na2O] + [K2O]− [Al2O3]
0.31
1.11
−1.09
0.57
−0.37
1.42
[B2O3]− ([Na2O] +
7.28
5.90
7.28
5.42
5.52
5.65
[K2O]− [Al2O3])
Strain Pt. (° C.)
562
545.1
596
568
594
549
Anneal Pt. (° C.)
611
594.9
653
623
649
596
Soft Pt. (° C.)
857
929
890
928
823
CTE (107° C.−1)
93.2
76
79.8
75.1
86.2
Density (g/cm3)
2.421
2.381
2.404
2.388
2.4
E Mod (Mpsi)
9.468
9.593
9.576
10.005
9.712
G Mod (Mpsi)
3.846
3.91
3.952
4.123
3.993
ν (Poisson's ratio)
0.231
0.227
0.211
0.213
0.216
Indentation Threshold (kgf)
27.5
27.5
32.5
32.5
42.5
27.5
CS (MPa)1
871.28
824.73
807.70
826.35
741.59
CS (MPa)1 (SOC corrected)
715.55
773.18
782.00
788.89
717.44
DOL (μm)1
55.06
55.00
54.74
54.74
54.51
54.45
CS (MPa)2
1067.00
960.72
950.41
961.11
847.99
CS (MPa)2 (SOC corrected)
855.74
900.68
920.17
917.54
820.39
DOL (μm)2
43.78
41.97
41.27
41.71
40.97
41.98
Glass (mol %)
91
92
93
94
95
96
SiO2
60.04
64.59
61.91
64.26
64.77
70.65
Al2O3
16.54
13.88
13.94
13.96
13.87
12.35
B2O3
6.43
7.02
6.07
7.14
6.51
3.95
Na2O
16.71
13.80
15.46
13.93
14.14
12.35
K2O
0.07
0.50
0.52
0.52
0.52
0.51
MgO
0.11
0.02
0.02
0.01
0.01
0.02
CaO
0.03
0.06
0.08
0.06
0.06
0.07
ZnO
P2O5
SnO2
0.07
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.24
0.41
2.03
0.49
0.78
0.51
[B2O3]− ([Na2O] +
6.19
6.61
4.04
6.65
5.73
3.44
[K20]− [Al2O3])
Strain Pt. (° C.)
566.277
557
593
565
567
582
Anneal Pt. (° C.)
619.0794
610
646
617
617
640
Soft Pt. (° C.)
879
883
885
874
869
949
CTE (107° C.−1)
89.1
79.4
84.4
81
80.5
71.2
Density (g/cm3)
2.399
2.379
2.449
2.379
2.388
2.374
E Mod (Mpsi)
9.607
9.451
9.842
9.443
9.531
9.784
G Mod (Mpsi)
3.925
3.864
4.02
3.858
3.941
4.047
ν (Poisson's ratio)
0.224
0.223
0.224
0.224
0.209
0.209
Indentation Threshold (kgf)
37.5
35
11.75
42.5
37.5
22.5
CS (MPa)1
782.47
931.17
786.03
782.17
754.58
CS (MPa)1 (SOC corrected)
853.81
724.59
737.12
749.86
DOL (μm)1
54.45
54.33
54.21
54.15
54.02
53.97
CS (MPa)2
871.70
1147.76
889.71
888.55
861.31
CS (MPa)2 (SOC corrected)
971.19
807.23
834.35
851.85
DOL (μm)2
43.91
41.57
39.13
44.73
42.96
49.11
Glass (mol %)
97
98
99
100
101
102
SiO2
64.32
62.77
64.75
59.99
54.58
64.48
Al2O3
14.00
14.55
13.91
16.55
18.38
14.03
B2O3
6.15
7.11
7.14
6.44
8.14
5.97
Na2O
13.82
14.87
13.99
16.85
18.47
13.81
K2O
0.51
0.51
0.01
0.07
0.26
0.50
MgO
1.01
0.03
0.01
0.07
0.01
1.03
CaO
0.06
0.07
0.06
0.03
0.05
0.07
ZnO
0.00
0.00
P2O5
SnO2
0.10
0.09
0.10
0.08
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.33
0.82
0.09
0.37
0.34
0.27
[B2O3]− ([Na2O] +
5.83
6.29
7.05
6.07
7.80
5.70
[K2O]− [Al2O3])
Strain Pt. (° C.)
572
546.8
577
560.9948
559
572
Anneal Pt. (° C.)
626
597.4
631
613.35
608
625
Soft Pt. (° C.)
889
854.5
913
872.8
846
893
CTE (107° C.−1)
79.4
78.1
89
94.4
79.6
Density (g/cm3)
2.391
2.384
2.371
2.4
2.42
2.389
E Mod (Mpsi)
9.579
9.264
9.56
9.458
9.645
G Mod (Mpsi)
3.955
3.791
3.891
3.836
3.938
ν (Poisson's ratio)
0.211
0.222
0.228
0.233
0.225
Indentation Threshold (kgf)
37.5
32
37.5
42.5
42.5
40
CS (MPa)1
769.54
801.86
861.80
830.03
CS (MPa)1 (SOC corrected)
733.99
748.04
730.95
838.22
799.49
DOL (μm)1
53.95
53.90
53.75
53.58
53.55
53.55
CS (MPa)2
905.70
918.13
1080.27
939.81
CS (MPa)2 (SOC corrected)
863.86
851.32
836.94
967.98
905.22
DOL (μm)2
40.24
43.64
43.41
42.77
42.36
40.85
Glass (mol %)
103
104
105
106
107
108
SiO2
65.01
64.02
64.37
64.27
65.59
65.08
Al2O3
14.23
13.70
13.96
13.94
13.90
13.22
B2O3
5.75
6.96
7.02
7.04
5.12
6.31
Na2O
14.75
14.63
13.97
13.12
15.15
13.19
K2O
0.08
0.50
0.01
0.52
0.11
0.51
MgO
0.04
0.02
0.01
0.01
0.01
1.50
CaO
0.03
0.06
0.06
0.06
0.03
0.08
ZnO
0.48
0.92
P2O5
SnO2
0.10
0.10
0.10
0.10
0.07
0.10
[Na2O] + [K2O]− [Al2O3]
0.60
1.43
0.02
−0.30
1.36
0.48
[B2O3]− ([Na2O] +
5.15
5.53
7.00
7.34
3.76
5.83
[K2O]− [Al2O3])
Strain Pt. (° C.)
566.5828
543.7
571
569
571
550
Anneal Pt. (° C.)
620.1886
591.9
627
624
621
603
Soft Pt. (° C.)
895
907
859
CTE (107° C.−1)
76
75.3
82.3
77
Density (g/cm3)
2.389
2.381
2.39
2.403
2.39
E Mod (Mpsi)
9.322
9.46
9.868
9.746
G Mod (Mpsi)
3.814
3.849
4.074
3.99
ν (Poisson's ratio)
0.222
0.229
0.211
0.221
Indentation Threshold (kgf)
37.5
(Ann)
22.5
27.5
32.5
17.5
37.5
CS (MPa)1
816.21
809.37
783.77
755.16
751.10
CS (MPa)1 (SOC corrected)
780.61
706.79
752.35
725.48
737.30
DOL (μm)1
53.47
53.29
53.26
53.12
53.06
53.00
CS (MPa)2
930.06
943.17
950.90
CS (MPa)2 (SOC corrected)
889.50
827.26
876.73
928.42
DOL (μm)2
42.92
41.77
39.99
41.16
Glass (mol %)
109
110
111
112
113
114
SiO2
64.48
63.80
63.21
64.47
66.65
62.81
Al2O3
13.96
13.95
13.99
14.01
13.03
14.61
B2O3
6.04
6.58
8.14
7.01
5.69
6.94
Na2O
13.21
14.97
13.96
13.78
12.32
14.95
K2O
0.10
0.50
0.50
0.00
1.01
0.51
MgO
2.10
0.02
0.02
0.53
1.06
0.02
CaO
0.03
0.06
0.06
0.07
0.13
0.06
ZnO
0.00
P2O5
SnO2
0.07
0.10
0.10
0.10
0.10
0.09
[Na2O] + [K2O]− [Al2O3]
−0.64
1.52
0.47
−0.22
0.30
0.85
[B2O3]− ([Na2O] +
6.69
5.06
7.67
7.24
5.39
6.08
[K2O]− [Al2O3])
Strain Pt. (° C.)
583
546
556
574
559.3
548.2
Anneal Pt. (° C.)
637
594
608
630
614.1
598.5
Soft Pt. (° C.)
899
856
906
899.7
CTE (107° C.−1)
74.7
80.6
75.7
75.8
Density (g/cm3)
2.387
2.375
2.372
2.375
E Mod (Mpsi)
9.746
9.276
9.305
G Mod (Mpsi)
3.957
3.807
3.825
ν (Poisson's ratio)
0.232
0.218
0.216
Indentation Threshold (kgf)
42.5
22.5
37.5
42.5
37.5
35
CS (MPa)1
811.03
748.11
812.57
CS (MPa)1 (SOC corrected)
710.94
685.39
757.32
741.11
752.91
DOL (μm)1
52.89
52.79
52.77
52.74
52.73
52.66
CS (MPa)2
953.71
876.23
926.46
CS (MPa)2 (SOC corrected)
833.02
802.77
863.47
804.99
856.01
DOL (μm)2
37.37
45.00
41.62
41.21
43.35
44.04
Glass (mol %)
115
116
117
118
119
120
SiO2
53.46
64.53
64.76
64.21
65.13
66.06
Al2O3
18.42
13.91
13.97
14.68
13.10
13.66
B2O3
9.13
6.61
5.57
5.73
6.07
5.74
Na2O
18.56
13.72
13.56
13.51
12.97
14.29
K2O
0.26
0.10
0.50
0.20
0.51
0.07
MgO
0.01
1.02
1.45
1.54
2.03
0.04
CaO
0.05
0.02
0.06
0.03
0.08
0.03
ZnO
0.00
0.00
0.00
0.00
P2O5
SnO2
0.10
0.07
0.10
0.07
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.39
−0.09
0.09
−0.97
0.38
0.70
[B2O3]− ([Na2O] +
8.74
6.70
5.48
6.71
5.70
5.04
[K2O]− [Al2O3])
Strain Pt. (° C.)
556
578
577
598
553
563.1957
Anneal Pt. (° C.)
606
632
632
654
606
616.3392
Soft Pt. (° C.)
828
906
895
926
CTE (107° C.−1)
93.1
76.6
79
76.8
76.7
Density (g/cm3)
2.414
2.38
2.395
2.388
2.391
E Mod (Mpsi)
9.292
9.544
9.605
9.664
9.822
G Mod (Mpsi)
3.767
3.902
4.006
3.975
4.02
ν (Poisson's ratio)
0.233
0.223
0.199
0.215
0.222
Indentation Threshold (kgf)
42.5
47.5
42.5
37.5
37.5
37.5
(Ann)
CS (MPa)1
824.51
820.08
791.46
840.55
740.40
789.01
CS (MPa)1 (SOC corrected)
762.22
795.76
753.01
DOL (μm)1
52.65
52.62
52.57
52.47
52.47
51.98
CS (MPa)2
1001.44
966.08
900.76
974.09
905.41
CS (MPa)2 (SOC corrected)
867.48
922.18
864.11
DOL (μm)2
41.74
40.47
41.52
40.15
41.55
Glass (mol %)
121
122
123
124
125
126
SiO2
67.63
62.14
64.53
66.44
66.45
66.42
Al2O3
12.84
15.58
13.98
13.46
13.10
13.04
B2O3
6.03
5.50
5.06
5.15
5.11
5.11
Na2O
12.81
15.76
13.74
12.63
13.00
13.10
K2O
0.51
0.06
0.51
0.20
0.20
0.20
MgO
0.01
0.92
2.00
2.01
2.01
2.01
CaO
0.07
0.04
0.06
0.03
0.03
0.03
ZnO
0.00
0.00
0.00
0.00
P2O5
SnO2
0.10
0.08
0.10
0.07
0.07
0.07
[Na2O] + [K2O]− [Al2O3]
0.48
0.24
0.28
−0.63
0.10
0.26
[B2O3]− ([Na2O] +
5.54
5.25
4.78
5.78
5.01
4.85
[K2O]− [Al2O3])
Strain Pt. (° C.)
558
567.7924
581
597
587
585
Anneal Pt. (° C.)
612
620.85
634
654
642
639
Soft Pt. (° C.)
888
885
902
927
911
909
CTE (107° C.−1)
76.7
84.8
79.7
73.2
75
75.9
Density (g/cm3)
2.374
2.401
2.383
2.386
2.387
E Mod (Mpsi)
9.544
9.703
9.776
9.698
9.764
9.799
G Mod (Mpsi)
3.942
3.967
4.042
4.038
4.013
4.029
ν (Poisson's ratio)
0.211
0.223
0.209
0.201
0.216
0.216
Indentation Threshold (kgf)
17.5
37.5
35
35
40
40
CS (MPa)1
804.54
796.84
807.95
802.46
799.16
CS (MPa)1 (SOC corrected)
869.82
776.81
772.02
766.77
764.54
DOL (μm)1
51.82
51.71
51.63
51.59
51.59
51.32
CS (MPa)2
873.09
914.88
926.42
935.89
936.31
CS (MPa)2 (SOC corrected)
978.41
891.88
885.22
894.27
895.75
DOL (μm)2
42.02
40.62
40.07
39.96
39.90
40.19
Glass (mol %)
127
128
129
130
131
132
SiO2
65.17
64.57
65.24
66.44
64.33
67.77
Al2O3
13.40
14.03
12.91
13.69
14.01
13.01
B2O3
6.56
7.00
5.47
5.15
4.58
3.49
Na2O
12.77
12.71
12.67
12.37
13.82
12.74
K2O
1.01
0.49
0.51
0.20
0.51
0.10
MgO
0.87
1.01
3.01
2.03
2.57
2.76
CaO
0.12
0.07
0.09
0.02
0.06
0.04
ZnO
0.00
0.00
P2O5
SnO2
0.10
0.10
0.10
0.07
0.10
0.07
[Na2O] + [K2O]− [Al2O3]
0.38
−0.83
0.27
−1.12
0.33
−0.17
[B2O3]− ([Na2O] +
6.17
7.83
5.20
6.28
4.24
3.66
[K2O]− [Al2O3])
Strain Pt. (° C.)
549.7
576
561
604
588
604
Anneal Pt. (° C.)
603.3
631
613
661
640
660
Soft Pt. (° C.)
878.4
913
939
899
942
CTE (107° C.−1)
74.9
74.7
71.2
78.2
73.9
Density (g/cm3)
2.375
2.372
2.397
2.382
2.407
2.393
E Mod (Mpsi)
9.425
9.964
9.803
9.885
9.945
G Mod (Mpsi)
3.851
4.077
4.038
4.089
4.118
ν (Poisson's ratio)
0.224
0.222
0.214
0.209
0.208
Indentation Threshold (kgf)
37.5
35
37.5
42.5
35
22.5
CS (MPa)1
792.11
732.63
801.36
806.89
825.18
CS (MPa)1 (SOC corrected)
712.77
728.85
710.62
762.74
794.90
811.15
DOL (μm)1
51.27
51.08
51.03
50.74
50.41
50.38
CS (MPa)2
899.49
920.82
928.73
940.49
CS (MPa)2 (SOC corrected)
789.12
827.65
876.44
914.92
924.50
DOL (μm)2
39.35
40.29
38.95
39.34
38.92
Glass (mol %)
133
134
135
136
137
138
SiO2
64.46
56.17
63.39
65.74
63.39
65.08
Al2O3
13.96
16.64
14.00
13.87
14.04
12.96
B2O3
6.01
10.14
6.91
5.08
7.02
5.78
Na2O
14.86
15.77
14.08
12.94
13.84
13.00
K2O
0.51
0.98
0.51
0.11
0.50
0.51
MgO
0.01
0.05
0.01
2.13
1.03
2.49
CaO
0.06
0.13
0.06
0.04
0.07
0.09
ZnO
0.92
P2O5
SnO2
0.10
0.10
0.10
0.07
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
1.42
0.12
0.60
−0.82
0.29
0.55
[B2O3]− ([Na2O] +
4.59
10.02
6.31
5.90
6.73
5.23
[K2O]− [Al2O3])
Strain Pt. (° C.)
562
535
555
597
562
554
Anneal Pt. (° C.)
611
584
606
653
614
607
Soft Pt. (° C.)
852
821
861
928
875
CTE (107° C.−1)
82.4
89.1
79.5
72.3
80.8
76.8
Density (g/cm3)
2.404
2.392
2.401
2.388
2.384
2.396
E Mod (Mpsi)
9.812
9.233
9.497
9.835
9.546
9.897
G Mod (Mpsi)
4.033
3.72
3.903
4.033
3.897
4.051
ν (Poisson's ratio)
0.216
0.241
0.217
0.219
0.225
0.222
Indentation Threshold (kgf)
17.5
27.5
32.5
32.5
42.5
37.5
CS (MPa)1
769.17
753.37
789.68
815.47
801.66
752.16
CS (MPa)1 (SOC corrected)
750.06
697.75
758.32
779.91
773.92
730.45
DOL1 (μm)
50.34
50.19
50.06
49.91
49.66
49.62
CS (MPa)2
905.17
926.36
930.69
931.65
927.02
CS (MPa)2 (SOC corrected)
882.69
857.96
893.73
891.02
894.94
DOL (μm)2
39.37
39.87
38.28
38.80
38.61
Glass (mol %)
139
140
141
142
143
144
SiO2
64.85
61.79
64.05
62.84
62.54
65.69
Al2O3
13.01
16.47
14.24
13.97
13.89
13.68
B2O3
6.81
5.04
5.91
8.37
8.83
6.28
Na2O
13.09
16.00
12.00
11.12
11.06
13.90
K2O
0.51
0.51
3.32
3.23
3.22
0.25
MgO
1.53
0.02
0.02
0.02
0.02
0.02
CaO
0.08
0.07
0.36
0.35
0.35
0.05
ZnO
P2O5
SnO2
0.10
0.10
0.10
0.10
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.59
0.04
1.08
0.39
0.38
0.47
[B2O3]− ([Na2O] +
6.22
4.99
4.83
7.99
8.44
5.81
[K2O]− [Al2O3])
Strain Pt. (° C.)
547
586.1
542
525
521
585
Anneal Pt. (° C.)
599
643.6
593
578
573
641
Soft Pt. (° C.)
857
926.5
841
834
826
925
CTE (107° C.−1)
76.4
88
85.2
83.6
78.4
Density (g/cm3)
2.388
2.401
2.408
2.38
2.377
2.372
E Mod (Mpsi)
9.712
9.876
9.389
9.349
9.369
G Mod (Mpsi)
3.981
4.074
3.848
3.768
3.854
ν (Poisson's ratio)
0.22
0.212
0.22
0.241
0.216
Indentation Threshold (kgf)
37.5
22.5
22.5
(Ann)
22.5
(Ann)
27.5
(Ann)
37.5
CS (MPa)1
722.07
CS (MPa)1 (SOC corrected)
DOL (μm)1
49.44
CS (MPa)2
849.69
801.14
703.76
693.72
930.58
CS (MPa)2 (SOC corrected)
981.12
859.49
DOL (μm)2
36.69
62.27
54.02
53.07
50.85
49.26
Glass (mol %)
145
146
147
148
149
150
SiO2
62.21
63.18
61.99
62.37
63.24
62.10
Al2O3
13.82
13.45
13.78
13.86
13.45
13.48
B2O3
9.32
9.03
8.87
8.33
8.93
9.99
Na2O
11.00
13.23
11.71
11.75
13.26
13.31
K2O
3.20
0.94
3.19
3.21
0.94
0.95
MgO
0.01
0.01
0.02
0.02
0.01
0.01
CaO
0.34
0.02
0.34
0.34
0.02
0.02
ZnO
P2O5
SnO2
0.10
0.11
0.10
0.10
0.12
0.12
[Na2O] + [K2O]− [Al2O3]
0.38
0.71
1.13
1.11
0.76
0.78
[B2O3]− ([Na2O] +
8.95
8.32
7.74
7.23
8.17
9.21
[K2O]− [Al2O3])
Strain Pt. (° C.)
518
548
518
523
550
Anneal Pt. (° C.)
570
601
566
571
602
Soft Pt. (° C.)
824
850
797
808
841
CTE (107° C.−1)
84
79.7
85.6
85.2
79.6
Density (g/cm3)
2.374
2.359
2.389
2.393
2.363
E Mod (Mpsi)
9.245
9.14
9.524
9.596
G Mod (Mpsi)
3.799
3.736
3.902
3.935
ν (Poisson's ratio)
0.217
0.223
0.221
0.219
Indentation Threshold (kgf)
32.5
(Ann)
32
(Ann)
22.5
(Ann)
17.5
(Ann)
35
(Ann)
32.5
(Ann)
CS (MPa)1
CS (MPa)1 (SOC corrected)
DOL (μm)1
CS (MPa)2
688.61
861.02
719.85
726.49
865.32
820.65
CS (MPa)2 (SOC corrected)
784.54
788.46
DOL (μm)2
48.85
48.13
47.96
47.80
47.30
47.09
Glass (mol %)
151
152
153
154
155
156
SiO2
62.70
64.44
68.60
64.26
64.88
64.24
Al2O3
13.94
12.27
12.86
12.73
13.71
12.45
B2O3
7.89
10.01
5.08
8.97
7.98
9.47
Na2O
11.79
12.16
12.75
12.93
12.27
12.73
K2O
3.21
0.95
0.52
0.94
1.02
0.94
MgO
0.02
0.01
0.01
0.01
0.01
0.01
CaO
0.35
0.02
0.07
0.02
0.01
0.02
ZnO
P2O5
SnO2
0.10
0.12
0.10
0.12
0.12
0.12
[Na2O] + [K2O]− [Al2O3]
1.05
0.84
0.41
1.14
−0.43
1.22
[B2O3]− ([Na2O] +
6.84
9.17
4.67
7.84
8.40
8.25
[K2O]− [Al2O3])
Strain Pt. (° C.)
531
536
571
543
550
540
Anneal Pt. (° C.)
579
588
628
594
609
589
Soft Pt. (° C.)
808
835
917
833
897
828
CTE (107° C.−1)
86.9
78
75.7
76.1
77.6
Density (g/cm3)
2.396
2.346
2.377
2.363
2.361
2.358
E Mod (Mpsi)
9.678
8.982
9.654
9.22
9.14
G Mod (Mpsi)
3.971
3.69
3.987
3.781
3.767
ν (Poisson's ratio)
0.219
0.217
0.211
0.219
0.213
Indentation Threshold (kgf)
22.5
32.5
32.5
32.5
32.5
32.5
CS (MPa)1
762.53
CS (MPa)1 (SOC corrected)
DOL (μm)1
48.26
CS (MPa)2
760.22
715.21
880.90
820.69
774.93
789.60
CS (MPa)2 (SOC corrected)
DOL (μm)2
47.06
46.76
46.44
46.23
46.10
45.68
Glass (mol %)
157
158
159
160
161
162
SiO2
51.33
62.37
62.08
55.91
64.96
62.21
Al2O3
20.21
13.46
14.39
18.37
14.21
14.18
B2O3
7.03
9.78
9.02
6.62
6.97
8.97
Na2O
19.17
13.26
13.37
18.66
12.72
13.51
K2O
0.97
0.95
1.02
0.26
0.98
1.01
MgO
1.03
0.01
0.00
0.02
0.01
0.01
CaO
0.13
0.02
0.02
0.05
0.01
0.02
ZnO
0.00
P2O5
SnO2
0.10
0.12
0.10
0.10
0.12
0.10
[Na2O] + [K2O]− [Al2O3]
−0.07
0.74
0.00
0.55
−0.50
0.33
[B2O3]− ([Na2O] +
7.10
9.04
9.02
6.07
7.47
8.64
[K2O]− [Al2O3])
Strain Pt. (° C.)
564
540
538
575
567
532
Anneal Pt. (° C.)
615
593
593
626
627
584
Soft Pt. (° C.)
851
840
868
866
921
841
CTE (107° C.−1)
97.2
80.6
81.2
91.5
77.6
82.2
Density (g/cm3)
2.443
2.359
2.367
2.427
2.371
2.365
E Mod (Mpsi)
9.786
9.116
9.557
9.354
9.282
G Mod (Mpsi)
3.945
3.727
3.903
3.854
3.761
ν (Poisson's ratio)
0.24
0.223
0.224
0.214
0.234
Indentation Threshold (kgf)
12.5
32.5
32.5
32.5
32.5
32.5
CS (MPa)1
1020.56
CS (MPa)1 (SOC corrected)
977.84
DOL (μm)1
49.18
CS (MPa)2
1083.22
834.56
809.46
1069.90
934.83
792.98
CS (MPa)2 (SOC corrected)
1037.89
DOL (μm)2
45.55
45.52
45.37
45.24
45.19
44.83
Glass (mol %)
163
164
165
166
167
168
SiO2
61.74
65.30
62.13
64.46
65.29
62.12
Al2O3
13.71
13.87
14.33
13.94
13.96
13.92
B2O3
9.29
6.25
8.13
6.97
6.25
9.02
Na2O
11.63
13.83
14.32
13.87
14.00
13.81
K2O
3.17
0.50
0.98
0.51
0.24
1.00
MgO
0.02
0.01
0.01
0.01
0.01
0.01
CaO
0.34
0.07
0.02
0.06
0.06
0.02
ZnO
P2O5
SnO2
0.10
0.12
0.10
0.12
0.12
0.10
[Na2O] + [K2O]− [Al2O3]
1.09
0.46
0.97
0.44
0.29
0.89
[B2O3]− ([Na2O] +
8.19
5.79
7.16
6.54
5.96
8.13
[K2O]− [Al2O3])
Strain Pt. (° C.)
514
574
536
566
579
530
Anneal Pt. (° C.)
563
628
585
620
635
581
Soft Pt. (° C.)
789
894
827
893
908
824
CTE (107° C.−1)
84.4
79.2
84.2
79.8
78.7
82.4
Density (g/cm3)
2.386
2.384
2.39
2.379
2.381
2.377
E Mod (Mpsi)
9.486
9.556
9.495
9.454
9.463
9.381
G Mod (Mpsi)
3.881
3.906
3.902
3.843
3.873
3.81
ν (Poisson's ratio)
0.222
0.223
0.217
0.23
0.222
0.231
Indentation Threshold (kgf)
22.5
32.5
32.5
32.5
32.5
32.5
CS (MPa)1
CS (MPa)1 (SOC corrected)
DOL (μm)1
CS (MPa)2
704.31
934.16
845.92
915.32
946.70
805.04
CS (MPa)2 (SOC corrected)
875.26
859.38
875.65
DOL (μm)2
44.05
43.95
43.71
43.15
42.95
42.68
Glass (mol %)
169
170
171
172
173
174
SiO2
62.09
64.23
65.29
62.19
62.83
64.24
Al2O3
14.10
12.01
13.88
13.85
13.16
12.46
B2O3
8.59
10.01
6.24
9.00
9.92
9.44
Na2O
14.09
11.70
14.07
13.81
12.98
12.74
K2O
1.01
1.91
0.26
1.02
0.99
0.94
MgO
0.01
0.00
0.01
0.01
0.00
0.01
CaO
0.02
0.02
0.06
0.02
0.02
0.02
ZnO
P2O5
SnO2
0.10
0.12
0.12
0.10
0.10
0.12
[Na2O] + [K2O]− [Al2O3]
1.01
1.60
0.45
0.97
0.81
1.22
[B2O3]− ([Na2O] +
7.58
8.41
5.79
8.03
9.11
8.22
[K2O]− [Al2O3])
Strain Pt. (° C.)
529
514
576
526
520
Anneal Pt. (° C.)
578
561
630
575
570
Soft Pt. (° C.)
808
783
897
816
808
CTE (107° C.−1)
83.4
77.5
79.5
83
79.2
Density (g/cm3)
2.387
2.367
2.383
2.379
2.363
E Mod (Mpsi)
9.436
9.365
9.425
9.319
9.202
G Mod (Mpsi)
3.884
3.833
3.931
3.838
3.742
ν (Poisson's ratio)
0.215
0.222
0.199
0.214
0.23
Indentation Threshold (kgf)
32.5
32.5
32.5
32.5
32.5
32.5
CS (MPa)1
CS (MPa)1 (SOC corrected)
DOL (μm)1
CS (MPa)2
816.97
649.74
945.67
786.16
717.94
818.76
CS (MPa)2 (SOC corrected)
883.18
DOL (μm)2
42.18
42.17
41.94
41.82
41.74
41.73
Glass (mol %)
175
176
177
178
179
180
SiO2
64.38
63.93
65.07
66.09
64.40
64.14
Al2O3
12.02
13.83
13.92
13.08
13.44
13.42
B2O3
9.80
8.09
6.31
6.97
8.95
7.15
Na2O
12.69
13.44
14.45
13.17
12.13
14.11
K2O
0.93
0.51
0.01
0.51
0.96
1.04
MgO
0.01
0.02
0.01
0.01
0.00
0.00
CaO
0.02
0.07
0.06
0.07
0.01
0.02
ZnO
P2O5
SnO2
0.12
0.10
0.12
0.10
0.10
0.12
[Na2O] + [K2O]− [Al2O3]
1.60
0.12
0.54
0.61
−0.35
1.74
[B2O3]− ([Na2O] +
8.21
7.97
5.78
6.37
9.30
5.41
[K2O]− [Al2O3])
Strain Pt. (° C.)
535
541
576
551
539
539
Anneal Pt. (° C.)
583
597
629
605
595
586
Soft Pt. (° C.)
807
881
894
879
878
810
CTE (107° C.−1)
78.5
78.4
77.9
73.5
82.1
Density (g/cm3)
2.36
2.368
2.385
2.373
2.354
2.398
E Mod (Mpsi)
9.257
9.257
9.432
9.46
9.027
9.836
G Mod (Mpsi)
3.799
3.777
3.887
3.874
3.725
4.031
ν (Poisson's ratio)
0.219
0.225
0.213
0.221
0.212
0.22
Indentation Threshold (kgf)
32.5
(Ann)
>25
32.5
22.5
35
(Ann)
17.5
(Ann)
CS (MPa)1
CS (MPa)1 (SOC corrected)
DOL (μm)1
CS (MPa)2
788.63
863.11
955.90
862.03
763.13
836.58
CS (MPa)2 (SOC corrected)
888.56
DOL (μm)2
41.43
41.31
41.12
41.12
40.69
40.65
Glass (mol %)
181
182
183
184
185
186
SiO2
62.13
61.38
64.41
64.67
60.98
65.38
Al2O3
13.59
13.64
12.94
13.50
13.80
12.94
B2O3
9.50
9.79
10.07
8.97
10.16
7.10
Na2O
13.64
11.58
11.38
12.73
13.92
13.88
K2O
1.01
3.15
1.04
0.02
1.01
0.51
MgO
0.00
0.02
0.01
0.01
0.01
0.01
CaO
0.02
0.34
0.03
0.01
0.02
0.06
ZnO
P2O5
SnO2
0.10
0.10
0.12
0.08
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
1.06
1.09
−0.52
−0.75
1.13
1.44
[B2O3]− ([Na2O] +
8.44
8.70
10.59
9.72
9.04
5.66
[K2O]− [Al2O3])
Strain Pt. (° C.)
522
512
529
569
517
554
Anneal Pt. (° C.)
571
560
586
628
565
602
Soft Pt. (° C.)
799
792
876
909
786
836
CTE (107° C.−1)
81.8
85.3
73.9
69.8
83.9
79.3
Density (g/cm3)
2.375
2.384
2.343
2.345
2.375
2.388
E Mod (Mpsi)
9.319
9.472
8.962
9.01
9.32
9.677
G Mod (Mpsi)
3.819
3.859
3.658
3.697
3.804
3.981
ν (Poisson's ratio)
0.22
0.227
0.225
0.219
0.225
0.215
Indentation Threshold (kgf)
32.5
32.5
32.5
32.5
22.5
25
CS (MPa)1
729.73
CS (MPa)1 (SOC corrected)
695.30
DOL (μm)1
48.21
CS (MPa)2
742.96
716.14
684.53
808.33
757.92
857.10
CS (MPa)2 (SOC corrected)
816.65
DOL (μm)2
40.65
40.59
40.52
40.46
39.98
39.86
Glass (mol %)
187
188
189
190
191
192
SiO2
64.48
64.56
62.26
65.09
61.29
64.50
Al2O3
12.48
13.14
13.68
13.81
13.54
13.00
B2O3
10.05
9.02
8.99
6.24
10.24
7.98
Na2O
11.81
12.05
13.95
14.60
13.73
13.39
K2O
1.03
1.09
1.00
0.01
1.07
0.99
MgO
0.01
0.01
0.00
0.01
0.01
0.01
CaO
0.02
0.01
0.02
0.06
0.02
0.01
ZnO
P2O5
SnO2
0.12
0.12
0.10
0.12
0.10
0.12
[Na2O] + [K2O]− [Al2O3]
0.37
0.01
1.26
0.80
1.26
1.37
[B2O3]− ([Na2O] +
9.68
9.01
7.73
5.44
8.98
6.61
[K2O]− [Al2O3])
Strain Pt. (° C.)
522
530
527
570
518
533
Anneal Pt. (° C.)
576
586
574
621
566
582
Soft Pt. (° C.)
835
867
803
879
780
819
CTE (107° C.−1)
75.5
76.6
82.2
78.8
82.1
79.7
Density (g/cm3)
2.349
2.355
2.383
2.388
2.378
2.383
E Mod (Mpsi)
9.007
9.09
9.621
9.355
9.342
9.568
G Mod (Mpsi)
3.713
3.742
3.868
3.857
3.809
3.949
ν (Poisson's ratio)
0.213
0.215
0.244
0.213
0.226
0.211
Indentation Threshold (kgf)
32.5
32.5
17.5
32.5
32.5
17
CS (MPa)1
CS (MPa)1 (SOC corrected)
DOL (μm)1
CS (MPa)2
683.02
755.13
799.44
946.67
746.92
792.49
CS (MPa)2 (SOC corrected)
872.33
DOL (μm)2
39.53
39.51
39.43
39.31
38.99
38.97
Glass (mol %)
193
194
195
196
197
198
SiO2
65.43
64.11
64.72
62.40
67.63
61.87
Al2O3
13.23
14.71
13.33
13.17
13.22
13.30
B2O3
5.91
5.22
8.00
10.40
3.45
10.22
Na2O
12.33
13.55
13.26
12.90
12.61
13.46
K2O
1.01
0.20
0.51
0.99
0.10
1.04
MgO
2.13
2.10
0.01
0.01
2.87
0.01
CaO
0.14
0.03
0.07
0.02
0.04
0.02
ZnO
0.00
P2O5
SnO2
0.10
0.07
0.10
0.10
0.07
0.10
[Na2O] + [K2O]− [Al2O3]
0.12
−0.96
0.44
0.72
−0.52
1.20
[B2O3]− ([Na2O] +
5.79
6.18
7.56
9.68
3.96
9.02
[K2O]− [Al2O3])
Strain Pt. (° C.)
557.1
598
539
518
610
517
Anneal Pt. (° C.)
610.8
652
590
568
665
566
Soft Pt. (° C.)
922
861
798
935
787
CTE (107° C.−1)
76.7
79.3
77.5
71.2
81.5
Density (g/cm3)
2.396
2.37
2.361
2.392
2.373
E Mod (Mpsi)
9.861
9.329
9.119
9.969
9.34
G Mod (Mpsi)
4.031
3.819
3.722
4.142
3.799
ν (Poisson's ratio)
0.223
0.221
0.225
0.203
0.229
Indentation Threshold (kgf)
32.5
47.5
17.5
32.5
22.5
32.5
CS (MPa)1
859.15
829.12
CS (MPa)1(SOC corrected)
739.27
829.92
815.28
DOL (μm)1
48.95
47.87
49.41
CS (MPa)2
985.85
862.47
722.43
937.28
753.27
CS (MPa)2 (SOC corrected)
790.05
952.31
921.63
DOL (μm)2
38.96
38.91
38.86
38.76
38.73
38.71
Glass (mol %)
199
200
201
202
203
204
SiO2
61.93
64.35
64.46
63.06
66.86
63.31
Al2O3
13.32
13.43
12.99
12.87
13.54
14.01
B2O3
10.21
8.44
7.12
10.01
3.41
7.11
Na2O
13.39
13.63
13.76
12.91
13.47
14.87
K2O
1.03
0.02
1.48
1.02
0.00
0.51
MgO
0.00
0.01
0.01
0.01
2.57
0.01
CaO
0.02
0.01
0.06
0.02
0.04
0.06
ZnO
P2O5
SnO2
0.10
0.10
0.10
0.10
0.08
0.10
[Na2O] + [K2O]− [Al2O3]
1.10
0.21
2.25
1.07
−0.07
1.37
[B2O3]− ([Na2O] +
9.12
8.23
4.87
8.94
3.47
5.74
[K2O]− [Al2O3])
Strain Pt. (° C.)
518
547
544
517
596.8418
557
Anneal Pt. (° C.)
566
600
590
567
651.925
604
Soft Pt. (° C.)
815
867
803
796
930
838
CTE (107° C.−1)
81.5
75.7
83.4
79.7
74.4
82.8
Density (g/cm3)
2.372
2.362
2.405
2.364
2.397
E Mod (Mpsi)
9.252
9.09
9.882
9.261
10.046
9.668
G Mod (Mpsi)
3.787
3.767
4.092
3.781
4.115
3.962
ν (Poisson's ratio)
0.222
0.207
0.208
0.225
0.221
0.22
Indentation Threshold (kgf)
32.5
33.5
22.5
32.5
17.5
17.5
CS (MPa)1
675.85
758.41
CS (MPa)1 (SOC corrected)
663.13
873.85
735.51
DOL (μm)1
47.67
47.97
47.46
CS (MPa)2
735.23
850.10
812.89
739.90
905.98
CS (MPa)2 (SOC corrected)
797.59
951.73
878.63
DOL (μm)2
38.58
38.51
38.48
38.47
38.37
38.19
Glass (mol %)
205
206
207
208
209
210
SiO2
64.19
63.98
68.73
67.78
67.53
57.08
Al2O3
12.66
14.65
13.23
13.46
13.77
18.53
B2O3
10.08
4.65
3.44
3.46
3.43
4.99
Na2O
11.86
13.71
12.01
12.28
12.68
18.69
K2O
1.05
0.21
0.00
0.10
0.00
0.49
MgO
0.01
2.68
2.46
2.79
2.47
0.01
CaO
0.02
0.03
0.04
0.04
0.04
0.07
ZnO
0.00
P2O5
SnO2
0.12
0.07
0.06
0.07
0.07
0.10
[Na2O] + [K2O]− [Al2O3]
0.26
−0.73
−1.22
−1.09
−1.09
0.65
[B2O3]− ([Na2O] +
9.82
5.38
4.66
4.55
4.52
4.34
[K2O]− [Al2O3])
Strain Pt. (° C.)
522
602
611.8241
618
609.9735
599
Anneal Pt. (° C.)
576
656
669.7462
674
667.3236
654
Soft Pt. (° C.)
846
917
961
952
961.4
922
CTE (107° C.−1)
75.3
76.7
69.4
70.6
72
95.3
Density (g/cm3)
2.346
2.403
2.391
2.388
2.429
E Mod (Mpsi)
8.96
9.998
10.076
10.021
10.04
9.774
G Mod (Mpsi)
3.691
4.087
4.154
4.136
4.161
3.949
ν (Poisson's ratio)
0.214
0.223
0.213
0.211
0.206
0.237
Indentation Threshold (kgf)
32.5
42.5
32.5
22.5
32.5
12.5
CS (MPa)1
871.17
826.03
CS (MPa)1 (SOC corrected)
854.51
794.15
808.24
842.19
DOL (μm)1
48.40
46.13
47.58
47.27
CS (MPa)2
716.98
996.31
922.73
CS (MPa)2 (SOC corrected)
977.26
865.74
902.86
915.68
DOL (μm) 2
38.18
38.17
38.04
38.02
38.01
Glass (mol %)
211
212
213
214
215
216
217
SiO2
57.03
57.09
61.20
61.13
60.43
59.37
58.52
Al2O3
18.70
18.63
16.86
16.99
17.36
17.50
17.52
B2O3
5.03
5.09
5.16
5.10
5.06
5.78
6.63
Na2O
18.52
18.47
15.22
14.52
14.45
14.42
14.39
K2O
0.49
0.49
1.42
2.19
2.65
2.88
2.89
MgO
0.02
0.02
0.11
0.03
0.01
0.01
0.01
CaO
0.07
0.08
0.02
0.02
0.02
0.02
0.02
ZnO
P2O5
SnO2
0.10
0.10
[Na2O] + [K2O]− [Al2O3]
0.31
0.34
−0.22
−0.27
−0.26
−0.19
−0.23
[B2O3]− ([Na2O] +
4.72
4.75
5.37
5.37
5.32
5.97
6.87
[K2O]− [Al2O3])
Strain Pt. (° C.)
612
609
596
594
595
585
572
Anneal Pt. (° C.)
667
664
654
654
654
641
629
Soft Pt. (° C.)
927
928
940.1
943.9
940.9
927.1
911.7
CTE (107° C.−1)
94.5
87.7
90
92.3
93.5
93.8
Density (g/cm3)
2.426
2.427
2.412
2.412
2.415
2.414
2.41
E Mod (Mpsi)
9.683
9.687
9.807
9.616
9.664
9.693
9.631
G Mod (Mpsi)
3.935
3.964
3.984
4.016
4.007
3.932
3.878
ν (Poisson's ratio)
0.23
0.222
0.231
0.197
0.206
0.233
0.242
Indentation Threshold (kgf)
20
25
27.5
27.5
27.5
32.5
27.5
CS (MPa)1
CS (MPa)1 (SOC corrected)
DOL (μm)1
CS (MPa)2
CS (MPa)2 (SOC corrected)
1122.4
(16 hr)
1093.3
(16 hr)
1125.70
1102.90
1066.30
DOL (μm)2
77.1
(16 hr)
83.4
(16 hr)
61.50
60.50
56.40
1Glass is fusion drawn/fictivated and ion exchanged at 410° C. for 8 hours in KNO3 molten salt bath.
2Glass annealed and ion exchanged at 410° C. for 8 hours in KNO3 molten salt bath.

In a first aspect a glass comprises: from about 50 mol % to about 72 mol % SiO2; from about 12 mol % to about 22 mol % Al2O3; up to about 6.5 mol % B2O3; up to about 1 mol % P2O5; from about 11 mol % to about 21 mol % Na2O; up to about 0.95 mol % K2O; up to about 4 mol % MgO; up to about 5 mol % ZnO; and up to about 2 mol % CaO. In the glass of the first aspect Na2O+K2O−Al2O3≤2.0 mol, B2O3−(Na2O+K2O−Al2O3)>1 mol %, 24 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, and the glass is substantially free of TiO2.

A second aspect includes the glass of the first aspect wherein the glass is substantially free of at least one of P2O5 and Li2O.

A third aspect includes the glass of the second aspect wherein the glass is substantially free of Li2O.

A fourth aspect includes the glass of the first aspect wherein 56 mol %≤SiO2+B2O3≤75 mol %.

A fifth aspect includes the glass of the first aspect wherein 2 mol %≤B2O3+P2O5≤7.5 mol %.

A sixth aspect includes the glass of the first aspect wherein the glass is ion exchanged and has a Vickers crack indentation threshold of at least about 9.5 kgf.

A seventh aspect includes the glass of the sixth aspect wherein the glass has a layer under compressive stress CS of greater than about 500 MPa, the layer extending from a surface of the glass to a depth of layer DOL, wherein CS·DOL=44000 MPa·μm.

An eighth aspect includes the glass of the sixth aspect wherein the glass has a compressive stress of greater than about 800 MPa and a depth of layer of at least about 40 μm, and has been ion exchanged for less than about four hours.

A ninth aspect includes the glass of the sixth aspect wherein the glass has a compressive stress of greater than about 800 MPa and a depth of layer of at least about 52 μm, and has been ion exchanged for less than about eight hours.

A tenth aspect includes the glass of the sixth aspect The glass of claim 6, wherein the glass has a compressive stress of greater than about 800 MPa and a depth of layer of at least about 30 μm, and has been ion exchanged for less than about two hours.

An eleventh aspect includes the glass of the first aspect wherein the glass is substantially free of As2O3 and Sb2O5.

A twelfth aspect includes the glass of the first aspect wherein the glass further comprises at least one fining agent.

A thirteenth aspect includes the glass of the twelfth aspect wherein the at least one fining agent comprises at least one of SnO2, CeO2, As2O3, Sb2O5, Cl, and F.

A fourteenth aspect includes the glass of the thirteenth aspect wherein the at least one fining agent comprises at least one of up to about 0.5 mol % SnO2, up to about 0.5 mol % As2O3, and up to about 0.5 mol % Sb2O3.

A fifteenth aspect includes the glass of the first aspect wherein the glass comprises: from about 55 mol % to about 62 mol % SiO2; from about 16 mol % to about 20 mol % Al2O3; from about 2 mol % to about 6.5 mol % B2O3; up to about 1 mol % P2O5; from about 14 mol % to about 18 mol % Na2O; from about 0.2 mol % to about 0.75 mol % K2O; up to about 0.5 mol % MgO; up to about 0.5 mol % ZnO; and up to about 0.5 mol % CaO.

A sixteenth aspect includes the glass of the fifteenth aspect wherein Na2O+K2O−Al2O3≤0.5 mol %.

A seventeenth aspect includes the glass of the fifteenth aspect wherein B2O3−(Na2O+K2O−Al2O3)>4 mol %.

An eighteenth aspect includes the glass of the fifteenth aspect wherein the glass comprises from about 4 mol % to about 6.5 mol % B2O3.

A nineteenth aspect includes the glass of the fifteenth aspect wherein the glass has a liquidus viscosity of at least 100 kpoise.

A twentieth aspect includes the glass of the nineteenth aspect wherein the glass is down-drawable.

In a twenty-first aspect a glass comprises: from about 55 mol % to about 62 mol % SiO2; from about 16 mol % to about 20 mol % Al2O3; from about 4 mol % to about 6.5 mol % B2O3; from about 14 mol % to about 18 mol % Na2O; from about 0.2 mol % to about 0.75 mol % K2O; up to about 0.5 mol % MgO; up to about 0.5 mol % ZnO; and up to about 0.5 mol % CaO. In the glass of the twenty-first aspect the glass is substantially free of P2O5, Na2O+K2O−Al2O3≤0.5 mol %, B2O3−(Na2O+K2O−Al2O3)>4 mol %, 28 mol %≤RAlO4≤45 mol %, where R is at least one of Na, K, and Ag, and the glass is substantially free of TiO2.

A twenty-second aspect includes the glass of the twenty-first aspect wherein the glass is substantially free of Li2O.

A twenty-third aspect includes the glass of the twenty-first aspect wherein 56 mol %≤SiO2+B2O3≤70 mol %.

A twenty-fourth aspect includes the glass of the twenty-first aspect wherein 0 mol %≤Σ[R′O]≤0.5 mol %, where R′ is at least one of Ca, Mg, and Zn.

A twenty-fifth aspect includes the glass of the twenty-first aspect wherein K2O≤0.25 (Na2O+K2O).

A twenty-sixth aspect includes the glass of the twenty-first aspect wherein the glass is substantially free of As2O3 and Sb2O3.

A twenty-seventh aspect includes the glass of the twenty-first aspect wherein the glass further comprises at least one fining agent, the fining agent comprising at least one of SnO2, CeO2, As2O3, and Sb2O5, Cl, and F.

A twenty-eighth aspect includes the glass of the twenty-seventh aspect wherein the at least one fining agent comprises at least one of up to about 0.5 mol % SnO2, up to about 0.5 mol % As2O3, and up to about 0.5 mol % Sb2O3.

A twenty-ninth aspect includes the glass of the twenty-first aspect wherein the glass has a liquidus viscosity of at least 100 kpoise.

A thirtieth aspect includes the glass of the twenty-ninth aspect wherein the glass is down-drawable.

A thirty-first aspect includes the glass of the twenty-first aspect wherein the glass is ion exchanged and has a Vickers crack indentation threshold of at least about 9.5 kgf.

A thirty-second aspect includes the glass of the thirty-first aspect wherein the glass has a layer under compressive stress CS of greater than 500 MPa, the layer extending from a surface of the glass to a depth of layer DOL, wherein CS·DOL=44000 MPa·μm.

A thirty-third aspect includes the glass of the thirty-first aspect wherein the glass has a compressive stress of greater than about 800 MPa and a depth of layer of at least about 40 μm, and has been ion exchanged for less than about four hours.

A thirty-fourth aspect includes the glass of the thirty-first aspect wherein the glass has a compressive stress of greater than about 800 MPa and a depth of layer of at least about 52 μm, and has been ion exchanged for less than about eight hours.

A thirty-fifth aspect includes the glass of the thirty-first aspect wherein the glass has a compressive stress of greater than about 800 MPa and a depth of layer of at least about 30 μm, and has been ion exchanged for less than about two hours.

In a thirty-sixth aspect a method of ion exchanging a glass comprises ion exchanging an alkali aluminosilicate glass for up to about eight hours in an ion exchange bath at a temperature of about 410° C. or less, the ion exchange bath comprising a potassium salt and the alkali aluminosilicate glass comprising: from about 50 mol % to about 72 mol % SiO2; from about 12 mol % to about 22 mol % Al2O3; up to about 6.5 mol % B2O3; up to about 1 mol % P2O5; from about 11 mol % to about 21 mol % Na2O; up to about 0.95 mol % K2O; up to about 4 mol % MgO; up to about 5 mol % ZnO; and up to about 1 mol % CaO. The ion exchanged alkali aluminosilicate glass has a compressive layer extending from a surface to a depth of layer DOL, the compressive layer having a compressive stress CS of at least 500 MPa, and the glass is substantially free of TiO2.

A thirty-seventh aspect includes the glass of the thirty-sixth aspect wherein CS·DOL=44000 MPa·μm.

A thirty-eighth aspect includes the glass of the thirty-sixth aspect wherein the glass is ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 52 μm within eight hours ion exchange time.

A thirty-ninth aspect includes the glass of the thirty-sixth aspect wherein the glass is ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 40 μm within four hours ion exchange time.

A fortieth aspect includes the glass of the thirty-sixth aspect wherein the glass is ion exchanged to achieve a compressive stress of at least about 800 MPa and a depth of layer of at least about 30 μm within two hours ion exchange time.

While typical embodiments have been set forth for the purpose of illustration, the foregoing description should not be deemed to be a limitation on the scope of the disclosure or appended claims. Accordingly, various modifications, adaptations, and alternatives may occur to one skilled in the art without departing from the spirit and scope of the present disclosure or appended claims.

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25.0/100 Score

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69.0/100 Score

Assignee Score

It takes the R&D behavior of the company itself into account that results in IP. During the invention phase, larger companies are considered to assign a higher R&D budget on a certain technology field, these companies have a better influence on their market, on what is marketable and what might lead to a standard.

19.0/100 Score

Legal Score

It shows the legal strength of IP in terms of its degree of protecting effect. Here we look into claim scope, claim breadth, claim quality, stability and priority.

Citation

Patents Cited in This Cited by
Title Current Assignee Application Date Publication Date
Method of making semicrystalline ceramic bodies and the composition thereof CORNING GLASS WORKS 23 November 1959 25 August 1964
Ion exchangeable glass with high compressive stress CORNING INCORPORATED 26 June 2012 03 January 2013
Development tool for comparing netlists GLOBALFOUNDRIES INC. 18 August 2009 24 February 2011
Ion exchangeable glasses CORNING INCORPORATED 27 May 2010 01 December 2011
Ion exchangable glass with deep compressive layer and high damage threshold CORNING INCORPORATED 28 November 2011 31 May 2012
See full citation <>

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US10000410 Fast ion exchangeable glasses 1 US10000410 Fast ion exchangeable glasses 2