| 摘要 |
PROBLEM TO BE SOLVED: To obtain a glass for substrates and glass substrate each with high weatherability even without being subjected to additional treatments including chemically reinforcing treatment. SOLUTION: This glass for substrates is composed of 40-59 wt.% SiO2, 5-20 wt.% Al2O3, 0-8 wt.% B2O3, 0-10 wt.% MgO, 0-12 wt.% CaO, 2-20 wt.% SrO, 0-2 wt.% BaO, 0-10 wt.% Na2O, 0-12 wt.% K2O, 0-10 wt.% TiO2, and 0-5 wt.% ZrO2; wherein MgO+CaO+SrO+BaO>=15 wt.%. |
