Intermediate to high CTE glasses and glass articles comprising the same

• US 10,112,865 B2
• Filed: 04/22/2016
• Issued: 10/30/2018
• Est. Priority Date: 08/15/2013
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Kiczenski, Timothy James, Mauro, John Christopher, Pierson-Stull, Michelle Diane, Schaut, Robert Anthony, Venkataraman, Natesan
• Primary Examiner(s): Bolden, Elizabeth A.
• Application Number:
  US15/136,189
• Publication Number:
  US 20160236972A1
• Time in Patent Office: 921 Days
• CPC Class Codes: B32B 17/00 Layered products essentially comprising sheet glass, or glass, slag, or like fibres
• 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: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• 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: C03C 13/046 Multicomponent glass compositions
• CPC Class Codes: C03C 3/085 containing an oxide of a divalent metal
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/091 containing aluminium
• 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:

about 60 mol % to about 75 mol % SiO₂,

8 mol % to 11 mol % Al₂O₃,

8 mol % to 10 mol % B₂O₃,

0 mol % to about 1 mol % Na₂O,

about 1 mol % to about 18 mol % K₂O,

0 mol % to about 7 mol % MgO,

0 mol % to about 9 mol % CaO,

about 1 mol % to about 8 mol % SrO,

0 mol % to about 4 mol % BaO, and

about 3 mol % to about 16 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:

about 65 mol % to about 75 mol % SiO₂,

8 mol % to 11 mol % Al₂O₃,

8 mol % to 10 mol % B₂O₃,

0 mol % to about 0.5 mol % Na₂O,

about 2 mol % to about 13 mol % K₂O,

0 mol % to about 7 mol % MgO,

0 mol % to about 9 mol % CaO,

about 2 mol % to about 6 mol % SrO,

0 mol % to about 1 mol % BaO, and

about 3 mol % to about 16 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO,

SrO, and BaO in the composition.

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

about 65 mol % to about 73 mol % SiO₂,

8 mol % to 11 mol % Al₂O₃,

8 mol % to 10 mol % B₂O₃,

>

0 mol % to about 0.5 mol % Na₂O,

about 2 mol % to about 13 mol % K₂O,

0 mol % to about 7 mol % MgO,

>

0 mol % to about 9 mol % CaO,

about 2 mol % to about 6 mol % SrO,

>

0 mol % to about 1 mol % BaO, and

about 5 mol % to about 16 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO,

SrO, and BaO in the composition.

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

about 60 mol % to about 75 mol % SiO₂,

8 mol % to 11 mol % Al₂O₃,

8 mol % to 10 mol % B₂O₃,

0 mol % to about 1 mol % Na₂O,

greater than 8 mol % to about 14 mol % K₂O,

0 mol % to about 7 mol % MgO,

0 mol % to about 9 mol % CaO,

about 1 mol % to about 8 mol % SrO,

0 mol % to about 4 mol % BaO, and

about 3 mol % to about 16 mol % R′

O,

wherein R′

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

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

about 60 mol % to about 75 mol % SiO₂,

8 mol % to 11 mol % Al₂O₃,

8 mol % to 10 mol % B₂O₃,

0 mol % to about 1 mol % Na₂O,

about 1 mol % to about 18 mol % K₂O,

0 mol % to about 7 mol % MgO,

0 mol % to about 9 mol % CaO,

about 1 mol % to about 8 mol % SrO,

0 mol % to about 4 mol % BaO, and

about 3 mol % to about less than 9 mol % R′

O,

wherein R′

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

6. 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 %.

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

about 62 mol % to about 73 mol % SiO₂,

8 mol % to 11 mol % Al₂O₃,

8 mol % to 10 mol % B₂O₃,

>

0 mol % to about 0.5 mol % Na₂O,

about 2 mol % to about 13 mol % K₂O,

0 mol % to about 7 mol % MgO,

>

0 mol % to about 9 mol % CaO,

about 2 mol % to about 6 mol % SrO,

>

0 mol % to about 1 mol % BaO,

about 3 mol % to about 16 mol % R′

O, wherein R′

O comprises the mol % of MgO, CaO,

SrO, and BaO in the composition,

wherein the amount of each of SnO₂, Fe₂O₃, or ZrO₂ is from greater than 0 to about 3 mol %, and

from 0 to about 3 mol % of TiO₂, MnO, ZnO, Nb₂O₅, MoO₃, Ta₂O₅, WO₃, Y₂O₃, La₂O₃, HfO₂, CdO, CeO₂, F⁻

, Cl⁻

, Br⁻

, I⁻

, or combinations thereof.

8. The glass composition of claim 1, wherein the CTE is from about 55×

10<sup>−

7</sup>/°

C. to about 120×

10<sup>−

7</sup>/°

C. in a range from 20°

C. to 300°

C.

9. The glass composition of claim 1, wherein the liquidus viscosity is greater than or equal to about 100 kPoise.

10. The glass composition of claim 9, wherein the liquidus viscosity is greater than or equal to about 250 kPoise.

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

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

13. A device comprising the glass composition or glass laminate of claim 1 as a cover glass or glass backplane in a consumer or commercial electronic device, including LCD and LED displays, computer monitors, automated teller machines (ATMs), for touch screen or touch sensor applications, for portable electronic devices including mobile telephones, personal media players, and tablet computers, for photovoltaic applications, for architectural glass applications, for automotive or vehicular glass applications, or for commercial or household appliance applications.