Patent ID: 11964907
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A glass comprising components, the glass having a composition of the components comprising:
greater than or equal to 40.5 mol. % and less than or equal to 53.0 mol. % SiO2,
greater than or equal to 23.0 mol. % and less than or equal to 43.0 mol. % MgO,
greater than or equal to 8.0 mol. % and less than or equal to 12.1 mol. % Al2O3,
greater than or equal to 2.2 mol. % and less than or equal to 4.4 mol. % ZrO2,
greater than or equal to 0.0 mol. % and less than or equal to 7.0 mol. % Y2O3,
greater than or equal to 0.2 mol. % and less than or equal to 2.1 mol. % TiO2,
greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % K2O,
greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % ZnO,
greater than or equal to 0.0 mol. % and less than or equal to 7.5 mol. % FeO,
greater than or equal to 0.0 mol. % and less than or equal to 7.0 mol. % BaO,
greater than or equal to 0.0 mol. % and less than or equal to 4.4 mol. % Na2O,
greater than or equal to 0.0 mol. % and less than or equal to 1.5 mol. % SrO,
greater than or equal to 0.0 mol. % and less than or equal to 1.5 mol. % Y2O3,
greater than or equal to 0.0 mol. % and less than or equal to 2.0 mol. % Ta2O5,
greater than or equal to 0 mol. % and less than or equal to 0.45 mol. % P2O5,
greater than or equal to 0.0 at. % and less than or equal to 1.0 at. % F,
a sum of CaO+SrO greater than or equal to 0 mol. % and less than or equal to 1.45 mol. %, and
a sum of ZrO2+HfO2+TiO2 is greater than or equal to 1.5 mol. % and less than or equal to 9.0 mol. %, and
wherein the composition of the components is substantially free of B2O3; and
wherein the glass satisfies the conditions:

R2O-Al2O3[in mol. %]≤9.0;

SiO2-Al2O3-R2O[in mol. %]≤38.5; and

MgO/RO[in mol. %]≥0.72,, where R2O is a total of monovalent metal oxides and RO is a total of divalent metal oxides.