| 摘要 |
An optical glass suitable for high-precision lenses moldable at a low temperature, and having a transformation temperature (Tg) of 340° C.-430° C. and excellent chemical durability, is provided by compositions that include Na2O, ZnO, P2O5, and Sb2O3, and optionally include K2O, CaO, BaO, SrO, and MgO-each within a specified wt % range.
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