Patent ID: 10351466

Abstract:
A glass of the present invention includes as a glass composition, in terms of mass %, 50% to 65% of SiO2, 15% to 26% of Al2O3, 0% to 5% of B2O3, 0% to 5% of MgO, 0% to 10% of CaO, 0% to 10% of SrO, 0% to 15% of BaO, and 0.01% to 15% of P2O5, has a molar ratio (MgO+CaO+SrO+BaO)/Al2O3 of from 0.5 to 1.5, and satisfies a relationship of {[B2O3]+3×[P2O5]}≤18.5 mol %.