| 摘要 |
PROBLEM TO BE SOLVED: To provide glass for a substrate having the composition excellent in weather resistance without chemical reinforcement treatment. SOLUTION: The composition of the glass consists of, by mass%, 40 to 59 SiO2, 5 to 20 Al2O3, 0 to 8 B2O3, 0 to 10 MgO, 0 to 12 CaO, 2 to 17 SrO, 0 to 2 BaO, 0 to 4 ZnO, 0 to 2 Li2O, 0 to 10 Na2O, 0 to 12 K2O, 0 to 10 TiO2 and 0 to 5 ZrO2, satisfying MgO+CaO+SrO+BaO>=15 and Al2O3+TiO2>=11. |
