Electric lamp and glass composition

Details Electric lamp and glass composition Electric lamp and glass composition

1985-09-03

1987-09-01

Bell, Mark L.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

501 67, 501 79, C03C 3093, C03C 3066, H01J 1718, H01J 6136

Patent

active

046911421

ABSTRACT:
The invention relates to a glass composition which can be used as an intermediate glass for sealing tunsten current supply wires in borosilicate glass, for example, for use in discharge lamps. The intermediate glass has a coefficient of expansion of from 38 to 44.10.sup.-7 K.sup.-1 and does not contain any sodium oxide, potassium oxide and lead oxide. Favorable thermal properties are obtained if the composition of the intermediate glass is kept within narrow limits.
The invention also relates to an electric lamp in which the intermediate glass is used.

REFERENCES:
patent: 4152282 (1979-05-01), Baudry et al
patent: 4323652 (1982-04-01), Baudry et al.
patent: 4385127 (1983-05-01), Chyung

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