Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1997-07-29
1998-10-20
Group, Karl
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C03C 317
Patent
active
058246150
ABSTRACT:
The present invention relates to an optical glass material which can be molded by using metal mold having relatively low price by virtue of lowered glass molding temperature, have improved stick resistance between the mold and the glass material, and thus be able to lengthen the lifespan of the mold used.
According to the present invention, is provided an optical glass composition for precise press molding, which comprises 73.9-81.5% of P.sub.2 O.sub.5, 6.7-8.3% of ZnO, 1.3-7.3% of BaO, 0.9-2.9% of SrO.sub.2, 0.8-1.1% of MgO, 4.9-6.1% of Li.sub.2 O, 1.1-1.4% of K.sub.2 O, 0.4-1.5% of Al.sub.2 O.sub.3 and 0.2-0.3% of Sb.sub.2 O.sub.3, of which the contents are based on oxides calculated from the batch.
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patent: 5173456 (1992-12-01), Hayden et al.
patent: 5526369 (1996-06-01), Hayden et al.
patent: 5607886 (1997-03-01), Onozawa
Group Karl
LG Electronics Inc.
White John P.
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