Glass compositions and methods with steam treatment haze resistance

Patent metadata

Field	Value
Publication number	US-11767255-B2
Application number	US-202217975818-A
Country	US
Kind code	B2
Filing date	Oct 28, 2022
Priority date	May 16, 2019
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

Glass-based articles that include a compressive stress layer extending from a surface of the glass-based article to a depth of compression are formed by exposing glass-based substrates to water vapor containing environments. The glass-based substrates have compositions selected to avoid the formation of haze during the treatment process. The methods of forming the glass-based articles may include elevated pressures and/or multiple exposures to water vapor containing environments selected to avoid the formation of haze during the treatment process.

First claim

What is claimed is:

1. A glass configured for strengthening by steam treatment, the glass comprising:
greater than or equal to 55 mol % to less than or equal to 70 mol % SiO 2 ,
greater than or equal to 3 mol % to less than or equal to 17 mol % Al 2 O 3 ,
greater than or equal to 3 mol % to less than or equal to 15 mol % P 2 O 5 ,
greater than or equal to 1 mol % to less than or equal to 7 mol % Li 2 O, and
greater than or equal to 5 mol % to less than or equal to 20 mol % K 2 O.

2. The glass of claim 1 , further comprising greater than or equal to 0 mol % to less than or equal to 1 mol % Na 2 O.

3. The glass of claim 1 , further comprising greater than or equal to 0 mol % to less than or equal to 0.5 mol % SnO 2 .

4. The glass of claim 1 , comprising a 200 P temperature of less than or equal to 1715° C.

5. The glass of claim 1 , comprising a liquidus viscosity of greater than or equal to 10 kP.

6. The glass of claim 1 , comprising a Young's modulus of greater than or equal to 50 GPa.

7. A glass configured for strengthening by steam treatment, the glass comprising:
greater than or equal to 57 mol % to less than or equal to 68 mol % SiO 2 ,
greater than or equal to 5 mol % to less than or equal to 15 mol % Al 2 O 3 ,
greater than or equal to 3 mol % to less than or equal to 12 mol % P 2 O 5 ,
greater than or equal to 1 mol % to less than or equal to 4 mol % Li 2 O, and
greater than or equal to 5 mol % to less than or equal to 20 mol % K 2 O.

8. The glass of claim 7 , comprising greater than or equal to 59 mol % to less than or equal to 63 mol % SiO 2 .

9. The glass of claim 7 , comprising greater than or equal to 9 mol % to less than or equal to 14 mol % Al 2 O 3 .

10. The glass of claim 7 , further comprising a positive amount of Na 2 O.

11. A glass configured for strengthening by steam treatment, the glass comprising:
greater than or equal to 59 mol % to less than or equal to 63 mol % SiO 2 ,
greater than or equal to 9 mol % to less than or equal to 14 mol % Al 2 O 3 ,
greater than or equal to 3 mol % to less than or equal to 12 mol % P 2 O 5 ,
greater than or equal to 1 mol % to less than or equal to 4 mol % Li 2 O,
greater than or equal to 5 mol % to less than or equal to 20 mol % K 2 O,
greater than 0 mol % Na 2 O.

12. The glass of claim 11 , comprising less than or equal to 1 mol % Na 2 O.

13. The glass of claim 11 , further comprising greater than or equal to 0 mol % to less than or equal to 0.5 mol % SnO 2 .

14. The glass of claim 11 , comprising a 200 P temperature of less than or equal to 1715° C.

15. The glass of claim 11 , comprising a liquidus viscosity of greater than or equal to 10 kP.

16. The glass of claim 11 , comprising a Young's modulus of greater than or equal to 50 GPa.

Assignees

• Corning Inc

Inventors

• Gross Timothy Michael
• Wu Jingshi

Classifications

• C03C3/097 Primary

  containing phosphorus, niobium or tantalum · CPC title

• C03C4/18

  for ion-sensitive glass · CPC title

• C03C21/007

  in gaseous phase · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03B27/04

  using gas · CPC title