CPC C03C 3/097 (2013.01) [C03C 4/18 (2013.01); C03C 21/002 (2013.01); H05K 5/0017 (2013.01); H05K 5/0217 (2013.01); C03C 2204/00 (2013.01)] | 19 Claims |
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.
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