Quartz to metal seal

Details Quartz to metal seal Quartz to metal seal

1982-12-17

1985-09-03

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

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

313636, 313315, 501 21, 501 49, H01J 536, H01J 6136, H01K 138

Patent

active

045395098

ABSTRACT:
A lead-free sealing glass consisting essentially of, in parts by weight, 8-25 BaO, 20-35 B.sub.2 O.sub.3, and 45-72 Sb.sub.2 O.sub.3 except for incidental impurities, residual fluxes and refining agents provides an improved molten sealing action especially useful for high temperature electric lamp envelopes and other electrical devices. More particularly, a protective molten seal utilizing said sealing glass is formed between a refractory metal inlead which extends into a larger sized opening of a fused quartz member by filling the free space between said opening in the fused quartz member and the refractory metal inlead with the aforementioned sealing glass composition and thereafter converting the sealing glass to a molten condition during device operation.

REFERENCES:
patent: 3211826 (1965-10-01), Holcomb et al.
patent: 3446637 (1969-05-01), Earl
patent: 3588315 (1971-06-01), Levand, Jr. et al.
patent: 3868528 (1975-02-01), Lake et al.
patent: 4105826 (1978-08-01), Thomas
patent: 4277285 (1981-07-01), Boudot
patent: 4441051 (1984-04-01), Thomas

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