| 摘要 |
An alkali-free glass consisting essentially of from 60 to 73 mol % of SiO2, from 5 to 16 mol % of Al2O3, from 5 to 12 mol % of B2O3, from 0 to 6 mol % of MgO, from 0 to 9 mol % of CaO, from 1 to 9 mol % of SrO, from 0 to less than 1 mol % of BaO, and from 7 to 18 mol % of MgO+CaO+SrO+BaO and having a strain point of at least 640 DEG C.
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