| 摘要 |
PROBLEM TO BE SOLVED: To provide nonalkali glass having low specific gravity, low coefficient of expansion and excellent acid resistance. SOLUTION: The non alkali glass consists of, by mol%, 64 to 74 SiO2, 5 to 14 Al2O3, 5 to 16 B2O3, 1 to 16.5 MgO, 0 to 14 CaO, 0 to 6 SrO and 0 to 2 BaO, preferably satisfying MgO/(MgO+CaO+SrO+BaO)>=0.1.
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