Glass for tungsten-halogen lamps

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

1984-10-24

1986-08-12

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 30, 501904, C03C 306

Patent

active

046056327

ABSTRACT:
This invention relates to the production of transparent, high silica glass envelopes for tungsten-halogen lamps consisting essentially, by weight, of 1-2.5% Al.sub.2 O.sub.3, 0.25-1% CaO, 0.1-0.25 Na.sub.2 O and/or K.sub.2 O, 2.5-3.5% B.sub.2 O.sub.3, 0.15-0.3% F, and the remainder SiO.sub.2.

REFERENCES:
patent: 2106744 (1934-03-01), Hood et al.
patent: 2221709 (1940-11-01), Hood et al.
patent: 3258351 (1966-06-01), Paymal
patent: 3258352 (1966-06-01), Paymal

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