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US 2024/0190756 A1Published application
Low-modulus ion-exchangeable glass compositions
AssigneeCorning Incorporated
InventorsTIMOTHY MICHAEL GROSS, JINGSHI WU
Life of this patent
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Abstract
A glass composition includes from 40 mol % to 56.5 mol % SiO2; from 10 mol % to 25 mol % Al2O3; from 12 mol % to 35 mol % B2O3; from 9 mol % to 14.75 mol % Na2O; from 0 mol % to 5 mol % K2O; and from 0 mol % to 3 mol % Li2O. The sum of Na2O, K2O, and Li2O (i.e., R2O) in the glass composition may be from 9 mol % to 19 mol %. (R2O—Al2O3)/B2O3 in the glass composition may be less than or equal to 0.25. R2O/Al2O3 in the glass composition may be from 0.8 to 1.5.
Claims20
A glass composition comprising:
- greater than or equal to 40 mol % and less than or equal to 56.5 mol % SiO2;
- greater than or equal to 10 mol % and less than or equal to 25 mol % Al2O3;
- greater than or equal to 12 mol % and less than or equal to 35 mol % B2O3;
- greater than or equal to 9 mol % and less than or equal to 14.75 mol % Na2O;
- greater than or equal to 0 mol % and less than or equal to 5 mol % K2O;
- and
- greater than or equal to 0 mol % and less than or equal to 3 mol % Li2O, wherein
- R2O is greater than or equal to 9 mol % and less than or equal to 19 mol %, wherein R2O is the sum of Na2O, K2O, and Li2O;
- (R2O—Al2O3)/B2O3 is less than or equal to 0.25;
- and
- R2O/Al2O3 is greater than or equal to 0.8 and less than or equal to 1.5.
8 more elements
An ion-exchanged glass article comprising:
- greater than or equal to 40 mol % and less than or equal to 56.5 mol % SiO2;
- greater than or equal to 10 mol % and less than or equal to 25 mol % Al2O3;
- greater than or equal to 12 mol % and less than or equal to 35 mol % B2O3;
- greater than or equal to 9 mol % and less than or equal to 14.75 mol % Na2O;
- greater than or equal to 0 mol % and less than or equal to 5 mol % K2O;
- and
- greater than or equal to 0 mol % and less than or equal to 3 mol % Li2O, wherein
- R2O is greater than or equal to 9 mol % and less than or equal to 19 mol %, wherein R2O is the sum of Na2O, K2O, and Li2O;
- (R2O—Al2O3)/B2O3 is less than or equal to 0.25;
- R2O/Al2O3 is greater than or equal to 0.8 and less than or equal to 1.5;
- and
- a Young's modulus of the glass article, before being ion-exchanged, is greater than or equal to 40 GPa and less than or equal to 70 GPa.
9 more elements
A method of strengthening a glass article, the method comprising:
- immersing the glass article in an ion-exchange solution, the glass article comprising:
- greater than or equal to 40 mol % and less than or equal to 56.5 mol % SiO2;
- greater than or equal to 10 mol % and less than or equal to 25 mol % Al2O3;
- greater than or equal to 12 mol % and less than or equal to 35 mol % B2O3;
- greater than or equal to 9 mol % and less than or equal to 14.75 mol % Na2O;
- greater than or equal to 0 mol % and less than or equal to 5 mol % K2O;
- and
- greater than or equal to 0 mol % and less than or equal to 3 mol % Li2O, wherein
- R2O is greater than or equal to 9 mol % and less than or equal to 19 mol %, wherein R2O is the sum of Na2O, K2O, and Li2O;
- (R2O—Al2O3)/B2O3 is less than or equal to 0.25;
- and
- R2O/Al2O3 is greater than or equal to 0.8 and less than or equal to 1.5;
- ion-exchanging the glass article in the ion-exchange solution for a time period greater than or equal to 1 hour and less than or equal to 24 hours at a temperature greater than or equal to 350° C. and less than or equal to 480° C. to achieve a compressive stress layer extending from a surface of the glass article to a depth of compression and comprising a peak compressive stress value in a range of 400 MPa to 900 MPa.
10 more elements
Dependencies are inferred from the claim text.