Laminated glass article and method for forming the same

• US 10,399,304 B2
• Filed: 05/07/2015
• Issued: 09/03/2019
• Est. Priority Date: 05/07/2014
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Cleary, Thomas Michael, Gomez, Sinue, Hu, Guangli, Schaut, Robert Anthony, Smith, Charlene Marie, Venkataraman, Natesan
• Primary Examiner(s): Colgan, Lauren R
• Application Number:
  US15/309,055
• Publication Number:
  US 20170129218A1
• Time in Patent Office: 1,580 Days
• Field of Search: 428426, 428428, 428432, 428688
• 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: B32B 2457/202 LCD, i.e. liquid crystal displays
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 7/027 Thermal properties
• 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: C03B 23/02 Re-forming glass sheets
• CPC Class Codes: C03C 3/083 containing aluminium oxide or an iron compound
• 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: C03C 3/093 containing zinc or zirconium
• CPC Class Codes: C03C 3/097 containing phosphorus, niobium or tantalum
• CPC Class Codes: H05K 1/0306 Inorganic insulating substrates, e.g. ceramic, glass
• CPC Class Codes: H05K 1/092 Dispersed materials, e.g. conductive pastes or inks

Abstract

A glass article includes a glass core layer and a glass cladding layer adjacent to the core layer. An average coefficient of thermal expansion (CTE) of the core layer is greater than an average CTE of the cladding layer. An effective 10^9.9 P temperature of the glass article is at most about 750° C.

Claims

1. A glass article comprising:

a glass core layer; and

a glass cladding layer adjacent to the core layer and comprising a first cladding layer adjacent to a first major surface of the core layer and a second cladding layer adjacent to a second major surface of the core layer opposite the first major surface;

wherein an average coefficient of thermal expansion (CTE) of the core layer is greater than an average CTE of each of the first cladding layer and the second cladding layer, and an effective 10^9.9 P temperature of the glass article is at most about 750°

C.

2. The glass article of claim 1, wherein a degradation rate of the cladding layer in response to exposure to a 5 vol % aqueous HCl solution at 95°

C. for 6 h is at most about 0.018 mg/cm² or at most about 0.009 mg/cm².

3. The glass article of claim 1, wherein a degradation rate of the cladding layer in response to exposure to a 1 M aqueous HNO₃ solution at 95°

C. for 24 h is at most about 0.08 mg/cm² or at most about 0.06 mg/cm².

4. The glass article of claim 1, wherein a degradation rate of the cladding layer in response to exposure to a 0.02 N aqueous H₂SO₄ solution at 95°

C. for 24 h is at most about 0.04 mg/cm² or at most about 0.02 mg/cm².

5. The glass article of claim 1, wherein a ratio of a thickness of the core layer to a thickness of the glass article is at least about 0.7.

6. The glass article of claim 1, further comprising a thickness of about 0.2 mm to about 3 mm.

7. The glass article of claim 1, wherein the effective 10^9.9 P temperature of the glass article is at most about 725°

C.

8. The glass article of claim 1, wherein the glass article is substantially free of a non-glass bonding material disposed between the core layer and the cladding layer.

9. The glass article of claim 1, wherein:

the core layer comprises from about 45 mol % to about 80 mol % SiO₂, from about 5 mol % to about 25 mol % Al₂O₃, and from about 9 mol % to about 16 mol % Na₂O; and

the cladding layer comprises from about 65 mol % to about 80 mol % SiO₂, from about 1 mol % to about 11 mol % Al₂O₃, from about 1 mol % to about 11 mol % Na₂O, and from about 0.1 mol % to about 10 mol % CaO.

10. The glass article of claim 1, wherein:

the core layer comprises from about 70 mol % to about 80 mol % SiO₂, from about 5 mol % to about 10 mol % Al₂O₃, and from about 9 mol % to about 13 mol % Na₂O; and

the cladding layer comprises from about 75 mol % to about 80 mol % SiO₂, from about 1 mol % to about 5 mol % Al₂O₃, from about 9 mol % to about 16 mol % B₂O₃, from about 2 mol % to about 5 mol % Na₂O, and from about 0.1 mol % to about 1 mol % CaO.

11. An automotive glazing, a display, or an architectural panel comprising the glass article of claim 1.

12. The automotive glazing of claim 11, further comprising a conductive pattern printed on a surface thereof, the pattern comprising at least one of an ink or an enamel.

13. The automotive glazing of claim 12, wherein the glass article is a shaped glass article, and the conductive pattern comprises a fired enamel.