Glass compositions and methods for strengthening via steam treatment
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 methods of forming the glass-based articles may include elevated pressures and/or multiple exposures to water vapor containing environments.
1. A glass, comprising:
greater than or equal to 47 mol % to less than or equal to 70 mol % SiO 2 ;
greater than or equal to 5 mol % to less than or equal to 17 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ; and
greater than 12 mol % to less than or equal to 23 mol % K 2 O.
2. The glass of claim 1 , wherein the SiO 2 is from greater than or equal to 52 mol % to less than or equal to 65 mol %.
3. The glass of claim 2 , wherein the SiO 2 is from greater than or equal to 55 mol % to less than or equal to 62 mol %.
4. The glass of claim 2 , wherein the Al 2 O 3 in from greater than or equal to 7 mol % to less than or equal to 16 mol %.
5. The glass of claim 1 , wherein the Al 2 O 3 in from greater than or equal to 8 mol % to less than or equal to 15 mol %.
6. The glass of claim 1 , wherein the P 2 O 5 is less than 14 mol %.
7. The glass of claim 1 , wherein the P 2 O 5 is less than 12 mol %.
8. The glass of claim 1 , wherein the P 2 O 5 is less than 10 mol %.
9. The glass of claim 1 , wherein the K 2 O is less than 18 mol %.
10. The glass of claim 1 , wherein the K 2 O is less than 14 mol %.
11. The glass of claim 1 , further comprising greater than 0 mol % to less than 19 mol % Na 2 O.
12. The glass of claim 11 , wherein the Na 2 O is less than 15 mol %.
13. The glass of claim 11 , wherein the Na 2 O is greater than 5 mol %.
14. The glass of claim 11 , wherein the Na 2 O is greater than 8 mol %.
15. The glass of claim 1 , further comprising
greater than or equal to 0 mol % to less than or equal to 5 mol Li 2 O;
greater than or equal to 0 mol % to less than or equal to 2 mol % Rb 2 O; and
greater than or equal to 0 mol % to less than or equal to 10 mol % Cs 2 O.
16. The glass of claim 1 , wherein the glass is substantially free of Li 2 O such that Li 2 O is optionally present in very small amounts but where Li 2 O, if present, is in amounts of less than 0.1 mol %.
17. The glass of claim 1 , wherein the glass is substantially free of Li 2 O, Na 2 O, Cs 2 O and Rb 2 O.
18. A glass, comprising:
greater than or equal to 47 mol % to less than or equal to 70 mol % SiO 2 ;
greater than or equal to 2.5 mol % to less than or equal to 17 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ; and
greater than 12 mol % to less than or equal to 23 mol % K 2 O.
19. The glass of claim 18 , wherein the glass is substantially free of Li 2 O, Na 2 O, Cs 2 O and Rb 2 O.
20. A glass, comprising:
greater than or equal to 52 mol % to less than or equal to 65 mol % SiO 2 ;
greater than or equal to 11 mol % to less than or equal to 17 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 12 mol % P 2 O 5 ; and
greater than or equal to 4.5 mol % to less than or equal to 14 mol % K 2 O.
21. A glass, comprising:
greater than or equal to 50 mol % to less than or equal to 67 mol % SiO 2 ;
greater than or equal to 11 mol % to less than or equal to 17 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 12 mol % P 2 O 5 ;
greater than 5 mol % to less than or equal to 23 mol % K 2 O; and
greater than 5 mol % to less than or equal to 19 mol % Na 2 O.
22. A glass, comprising:
greater than or equal to 52 mol % to less than or equal to 65 mol % SiO 2 ;
greater than or equal to 11 mol % to less than or equal to 17 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ;
greater than or equal to 4.5 mol % to less than or equal to 23 mol % K 2 O; and
greater than 0 mol % to less than or equal to 19 mol % Na 2 O.
23. The glass of claim 22 , wherein the K 2 O is greater than 5 mol %.
24. The glass of claim 23 , wherein the Na 2 O is greater than 5 mol %.
25. A glass, comprising:
greater than or equal to 52 mol % to less than or equal to 65 mol % SiO 2 ;
greater than or equal to 5 mol % to less than or equal to 17 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 12 mol % P 2 O 5 ; and
greater than 12 mol % to less than or equal to 23 mol % K 2 O.
26. The glass of claim 25 , wherein the K 2 O is greater than 13 mol %.