INTERMEDIATE CTE GLASSES AND GLASS ARTICLES COMPRISING THE SAME

• US 20170226000A1
• Filed: 08/13/2014
• Published: 08/10/2017
• Est. Priority Date: 08/13/2014
• Status: Abandoned Application

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: KICZENSKI, TIMOTHY JAMES, PIERSON-STULL, MICHELLE DIANE
• Application Number:
  US15/503,221
• Publication Number:
  US 20170226000A1
• Time in Patent Office: Days
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: C03B 17/02 Forming molten glass coated with coloured layers; Forming molten glass of different compositions or layers; Forming molten glass comprising reinforcements or inserts
• CPC Class Codes: C03B 17/064 by the overflow downdraw fusion process; Isopipes therefor
• CPC Class Codes: C03C 3/093 containing zinc or zirconium
• CPC Class Codes: Y02P 40/57 Improving the yield, e-g- reduction of reject rates

Abstract

Intermediate to high CTE glass compositions and laminates formed from the same are described. The glasses described herein have properties, such as liquidus viscosity or liquidus temperature, which make them particularly well suited for use in fusion forming processes, such as the fusion down draw process and/or the fusion lamination process. Further, the glass composition may be used in a laminated glass article, such as a laminated glass article formed by a fusion laminate process, to provide strengthened laminates via clad compression as a result of CTE mismatch between the core glass and clad glass.

Claims

1. A glass composition comprising:

60 mol % to 70 mol % SiO₂

4 mol % to 12 mol % Al₂O₃

1 mol % to 10 mol % B₂O₃

0 mol % to 8 mol % MgO

>

0 mol % to 15 mol % CaO

>

0 mol % to 15 mol % SrO,

>

0 mol % to 15 mol % BaO, and

16 mol % to 28 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition.

2. The glass composition of claim 1, wherein the composition comprises:

60 mol % to 68 mol % SiO₂

5 mol % to 10 mol % Al₂O₃

4 mol % to 10 mol % B₂O₃

>

0 mol % to 7 mol % MgO

4 mol % to 10 mol % CaO

4 mol % to 10 mol % SrO,

2 mol % to 10 mol % BaO, and

18 mol % to 25 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition.

3. The glass composition of claim 1, wherein the glass is essentially free of K₂O.

4. The glass composition of claim 1, wherein the glass is essentially free of alkali oxides.

5. The glass composition of claim 1, consisting essentially of:

60 mol % to 70 mol % SiO₂

4 mol % to 12 mol % Al₂O₃

1 mol % to 10 mol % B₂O₃

0 mol % to 8 mol % MgO

>

0 mol % to 15 mol % CaO

>

0 mol % to 15 mol % SrO,

>

0 mol % to 15 mol % BaO, and

16 mol % to 28 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition.

7. The glass composition of claim 2, consisting essentially of:

60 mol % to 68 mol % SiO₂

5 mol % to 10 mol % Al₂O₃

4 mol % to 10 mol % B₂O₃

>

0 mol % to 7 mol % MgO

4 mol % to 10 mol % CaO

4 mol % to 10 mol % SrO,

2 mol % to 10 mol % BaO, and

18 mol % to 25 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition.

9. The glass composition of claim 1, further comprising one or more of:

1.5≦

R′

O/Al₂O₃≦

4;

0≦

MgO/R′

O≦

0.5;

0.2≦

CaO/R′

O≦

0.8;

0.2≦

SrO/R′

O≦

0.8;

or

0.08≦

BaO/R′

O≦

0.8.

10. The glass composition of claim 1, further comprising one or more of:

2.25≦

R′

O/Al₂O₃≦

3.25;

0≦

MgO/R′

O≦

0.2;

0.2≦

CaO/R′

O≦

0.5;

0.2≦

SrO/R′

O≦

0.35;

or

0.1≦

BaO/R′

O≦

0.4.

23. A glass laminate comprising a glass core and at least one glass clad, wherein the glass core comprises any one of the glass compositions in claim 1.

25. The glass composition of claim 1, further comprising one or more of SnO₂, Fe₂O₃, or ZrO₂, wherein when present, the amount of each of SnO₂, Fe₂O₃, or ZrO₂ is from greater than 0 to about 3 mol %.

26. The glass composition of claim 1, wherein the CTE is from about 45×

10<sup>−

7</sup>/°

C. to about 65×

10<sup>−

7</sup>/°

C. in a range from 20°

C. to 300°

C.

27. A glass laminate comprising a glass core and at least one glass clad, wherein the glass core comprises the glass composition of claim 1.

6. (canceled)

8. (canceled)

11. A glass composition comprising:

60 mol % to 70 mol % SiO₂

4 mol % to 12 mol % Al₂O₃

1 mol % to 10 mol % B₂O₃

0 mol % to 8 mol % MgO

>

0 mol % to 15 mol % CaO

>

0 mol % to 15 mol % SrO,

>

0 mol % to 15 mol % BaO, and

10 mol % to 28 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition, and the glass composition is essentially free of K₂O.

12. The glass composition of claim 11, wherein the composition comprises:

60 mol % to 68 mol % SiO₂

5 mol % to 10 mol % Al₂O₃

4 mol % to 10 mol % B₂O₃

>

0 mol % to 7 mol % MgO

4 mol % to 10 mol % CaO

4 mol % to 10 mol % SrO,

2 mol % to 10 mol % BaO, and

18 mol % to 25 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition, and the glass composition is essentially free of K₂O.

13. The glass composition of claim 11, wherein the glass is essentially free of alkali oxides.

14. The glass composition of claim 11, consisting essentially of:

60 mol % to 70 mol % SiO₂

4 mol % to 12 mol % Al₂O₃

1 mol % to 10 mol % B₂O₃

0 mol % to 8 mol % MgO

>

0 mol % to 15 mol % CaO

>

0 mol % to 15 mol % SrO,

>

0 mol % to 15 mol % BaO, and

16 mol % to 28 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition.

16. The glass composition of claim 12, consisting essentially of:

60 mol % to 68 mol % SiO₂

5 mol % to 10 mol % Al₂O₃

4 mol % to 10 mol % B₂O₃

>

0 mol % to 7 mol % MgO

4 mol % to 10 mol % CaO

4 mol % to 10 mol % SrO,

2 mol % to 10 mol % BaO, and

18 mol % to 25 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO, SrO, and BaO in the composition.

18. The glass composition of claim 11, further comprising one or more of:

1.5≦

R′

O/Al₂O₃≦

4;

≦

MgO/R′

O≦

0.5;

0.2≦

CaO/R′

O≦

0.8;

0.2≦

SrO/R′

O≦

0.8;

or

0.08≦

BaO/R′

O≦

0.8.

19. The glass composition of claim 11, further comprising one or more of:

2.25≦

R′

O/Al₂O₃≦

3.25;

0≦

MgO/R′

O≦

0.2;

0.2≦

CaO/R′

O≦

0.5;

0.2≦

SrO/R′

O≦

0.35;

or

0.1≦

BaO/R′

O≦

0.4

wherein the CTE is from about 45×

10<sup>−

7</sup>/°

C. to about 65×

10<sup>−

7</sup>/°

C. in a range from 20°

C. to 300°

C.

20. The glass composition of claim 11, further comprising one or more of SnO₂, Fe₂O₃, or ZrO₂, wherein when present, the amount of each of SnO₂, Fe₂O₃, or ZrO₂ is from greater than 0 to 3 mol %.

15. (canceled)

17. (canceled)

21. (canceled)

22. (canceled)

24. (canceled)