Patent ID: 11932577
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A glass comprising:
from greater than 57 mol % to 67 mol % SiO2;
from 9 mol % to 18 mol % Al2O3;
from 4 mol % to 8 mol % P2O5;
from 13 mol % to 16 mol % Na2O;
from greater than 1 mol % to 5 mol % K2O; and
ZnO,
wherein (R2O(mol %)+R′O(mol %))−(Al2O3(mol %)+P2O5(mol %))<0, R2O=Li2O+Na2O+K2O+Rb2O+Cs2O, and P′O=ZnO+MgO+CaO+SrO+BaO, and
wherein the glass is substantially free of lithium.