Glass envelopes for tungsten-halogen lamps

Details Glass envelopes for tungsten-halogen lamps Glass envelopes for tungsten-halogen lamps

1982-11-12

1983-10-11

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C03C 308

Patent

active

044093373

ABSTRACT:
This invention is directed to glasses especially suitable for use as envelopes in tungsten-halogen lamps, those glasses exhibiting liquidus temperatures no higher than 1125.degree. C., liquidus viscosities of at least 50,000 poises, coefficients of thermal expansion between about 42-46.times.10.sup.-7 /.degree.C., and consisting essentially, in weight percent on the oxide basis of

REFERENCES:
patent: 3496401 (1970-02-01), Dumbaugh, Jr.
patent: 3798491 (1974-03-01), Malm
patent: 3978362 (1976-08-01), Dumbaugh, Jr. et al.
patent: 4060423 (1977-11-01), Thomas
patent: 4255198 (1981-03-01), Danielson et al.
patent: 4302250 (1981-11-01), Danielson

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