| 摘要 |
PROBLEM TO BE SOLVED: To obtain a glass having a high specific Young's modulus. SOLUTION: In the glass composition, ranges of the main components are specified to >=65 wt.% and <=80 wt.% of SiO2, >=3 wt.% and <=15 wt.% of Al2O3, >=3 wt.% and <=15 wt.% of Li2O, >=0.2 wt.% and <=5 wt.% of P2O5, and >=2.5 wt.% and <=12 wt.% of ZrO2.
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