Antiblurring glass

Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...

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2523014P, 501 79, 501905, C03C 316

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active

043057578

ABSTRACT:
A glass for use as an optical glass having an anti-blurring property, water resistance and hardness and decreased liquidus temperature, said glass consisting essentially of, in mol. %, 47 to 65% P.sub.2 O.sub.5, 0.5 to 12% SiO.sub.2, 0.5 to 10% B.sub.2 O.sub.3, 6 to 15% SiO.sub.2 +B.sub.2 O.sub.3, 0 to 30% alkali metal oxide, 5 to 35% alkaline earth metal oxide, 20 to 45% alkali metal oxide+alkaline earth metal oxide, 0 to 5% Al.sub.2 O.sub.3, 0 to 10% ZnO, and no PbO. Oxides of Ce, Nd and Er may also be present.

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