Phosphate optical glass

Details Phosphate optical glass Phosphate optical glass

1983-09-12

1984-10-09

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 44, 501 74, 501903, C03C 316

Patent

active

044762330

ABSTRACT:
A phosphate optical glass comprises P.sub.2 O.sub.5 of 40-55 weight percents, R.sub.2 O of 20-40 weight percents (wherein R is an alkali metal or a mixture of alkali metals selected from the group consisting of Li, Na and K), TiO.sub.2 of 8-20 weight percents, WO.sub.3 of 1-12 weight percents (providing that the WO.sub.3 content be less than TiO.sub.2), As.sub.2 O.sub.3 of 0.1-4 weight percents, MgO of 0-7, CaO of 0-11, BaO of 0-12, ZnO of 0-12 PbO of 0-18, Nb.sub.2 O.sub.5 of 0-20, Ta.sub.2 O.sub.5 of 0-10, SiO.sub.2 of 0-3, ZrO.sub.2 of 0-3, La.sub.2 O.sub.3 of 0-3, Y.sub.2 O.sub.3 of 0-3 and F of 0-5.

REFERENCES:
patent: 3068108 (1962-12-01), Geffcken
patent: 3836375 (1974-09-01), Broemer et al.
patent: 4108673 (1978-08-01), Toratani et al.
patent: 4261751 (1981-04-01), Nakamura et al.

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