Thallium-containing optical glass

Details Thallium-containing optical glass Thallium-containing optical glass

1982-05-11

1985-01-22

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 60, 501 61, 501 62, 501 63, 501 64, 501 65, 501 66, 501 67, 501 68, 501 69, 501 70, 501 72, 501 73, 501 74, 501 75, 501 76, 501 77, 501 78, 501 79, 501900, 501903, 350413, C03C 304, C03C 308, C03C 310, C03C 330

Patent

active

044952988

ABSTRACT:
A thallium-containing optical glass composition which comprises the following oxides in the indicated proportions in mole %: SiO.sub.2 35-80, Tl.sub.2 O 1-30, Tl.sub.2 O+R.sub.2 O (R being an alkali metal) 1-35, ZnO 0-35, GeO.sub.2 0-30, BaO 0-25, TiO.sub.2 0-20, MgO 0-20, B.sub.2 O.sub.3 0-less than 10, ZrO.sub.2 0-2, Al.sub.2 O.sub.3 0-8, SnO 0-5, CaO 0-10, SrO 0-10, PbO 0-10, La.sub.2 O.sub.3 0-5, Bi.sub.2 O.sub.3 0-8, and Ta.sub.2 O.sub.5 0-2, and satisfies the following relations:

REFERENCES:
patent: 3843228 (1974-10-01), Yoshiyagawa et al.
patent: 3859103 (1975-01-01), Yoshiyagawa et al.
patent: 3941474 (1976-03-01), Kitano et al.
patent: 4177319 (1979-12-01), Jahn

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