Glass composition

Details Glass composition Glass composition

1997-12-01

1999-11-02

Marcheschi, Michael

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 67, 501 68, 501 69, 501 70, 501 72, 501 64, 313480, 313493, 313636, 313315, 313317, H01K 126, H01K 128, C03C 3085, C03C 3091

Patent

active

059770015

ABSTRACT:
The invention relates to a glass composition for electric lamps which glass composition comprises SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, Li.sub.2 O, B.sub.2 O.sub.3, BaO and SrO and optionally CaO, MgO, ZnO, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3, TiO.sub.2, MnO.sub.2, Fe.sub.2 O.sub.3 and/or CeO.sub.2. The composition according to the invention has a B.sub.2 O.sub.3 content of 1 to 2.8 mass %, a SrO content of 2.1 to 4.5 mass %, a BaO content of 3 to 6 mass % and of the components being present optionally, the amount of CaO is maximum 1 mass %, that of MgO is maximum 2.4 mass % and that of ZnO is maximum 3 mass %, on the condition that the total amount of SrO and B.sub.2 O.sub.3 is at least 3.6 mass %, the total amount of CaO and MgO is maximum 2.4 mass % and the total amount of MgO and ZnO is maximum 4.5 mass %.

REFERENCES:
patent: 3885182 (1975-05-01), Chu
patent: 4521524 (1985-06-01), Yamashita
patent: 4562161 (1985-12-01), Mennemann et al.
patent: 5391523 (1995-02-01), Marlor
patent: 5525553 (1996-06-01), Brocheton et al.

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