Borosilicate glass for electronic flash lamps

Details Borosilicate glass for electronic flash lamps Borosilicate glass for electronic flash lamps

1991-04-17

1993-01-26

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 67, C03C 3091, C03C 3093

Patent

active

051822377

ABSTRACT:
A borosilicate glass is described of the composition on oxide basis in % by weight of 50-75 SiO.sub.2, 11-18 B.sub.2 O.sub.3, 1-5 Al.sub.2 O.sub.3, 0-3 Li.sub.2 O, 0-3 Na.sub.2 O, 0-2 K.sub.2 O, 9-22 Cs.sub.2 O, 0-2 ZnO, 0-2 MgO, 0-3 CaO, 0-3 SrO, 0-3 BaO, provided that the sum of the alkali oxides, apart from Cs.sub.2 O, is at most 5 and the sum of the alkaline-earth oxides plus ZnO is at most 6. The glass is especially suitable for the production of electronic flash lamps, which with this glass reach a multiple of the service life of electronic flash lamps made from the conventional glass.

REFERENCES:
patent: 3208860 (1965-09-01), Armistead et al.
patent: 3306833 (1967-02-01), O'Leary
patent: 4001019 (1977-01-01), Yamashita et al.
patent: 4396720 (1983-08-01), Beall et al.
patent: 4550087 (1985-10-01), Kerko et al.
patent: 4665039 (1987-05-01), Kokubu et al.
patent: 4944784 (1990-07-01), Kohli et al.
patent: 5017521 (1991-05-01), Yale et al.

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