Patent ID: 11905209
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A glass composition comprising:
greater than or equal to 55.0 mol % and less than or equal to 65.0 mol % SiO2;
greater than or equal to 14.0 mol % and than or equal to 20.0 mol % Al2O3;
greater than or equal to 0.0 mol % and less than or equal to 3.0 mol % P2O3;
greater than or equal to 1.0 mol % and less than or equal to 7.0 mol % B2O3;
greater than or equal to 5.0 mol % and less than or equal to 10.0 mol % Li2O;
greater than or equal to 5.0 mol % and less than or equal to 10.0 mol % Na2O; and
greater than or equal to 0.0 mol % and less than or equal to 1.0 mol % K2O,
wherein:
R2O is in the range from greater than or equal to 13.0 mol % to less than or equal to 20.0 mol %, wherein R2O is the sum of alkali metal oxides in the glass composition;
Al2O3+R2O is in the range from greater than or equal to 28.0 mol % to less than or equal to 40.0 mol %; and
−0.1≤(Al2O3—(R2O+RO))/Li2O≤0.3, wherein RO is the sum of alkaline earth metal oxides in the glass composition,, wherein the glass composition has a softening point in the range from greater than or equal to 650.0° C. to less than or equal to 850.0° C.