Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1991-07-24
1993-08-17
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
501 12, 501 54, 501152, 65 321, 65DIG1, 65DIG8, 423 211, 428426, 428446, C03C 306, C03C 3095
Patent
active
052368769
ABSTRACT:
A body of cerium-doped quartz glass is manufactured by melting together silicon oxide and a cerium (III) silicate compound, preferably Ce.sub.2 Si.sub.2 O.sub.7, in a reducing atmosphere. The invention provides a method of manufacturing said cerium-silicate compound having a tetragonal crystal structure. The quartz glass manufactured can be suitably used in a lamp envelope of UV-absorbing quartz glass, the water content in the quartz glass being less than 1 ppm.
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patent: 3764286 (1973-10-01), Antczak et al.
patent: 4361779 (1982-11-01), van der Steen et al.
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patent: 4814105 (1989-03-01), Oversluizen et al.
Chemical Abstracts, No. 154204x vol. 104, No. 18, May 5, 1986 Kh. A. Cherches et al., "Preparation of Cerium Silicates", p. 330.
Chemical Abstract No. 70771h, vol. 73, No. 14, 1970, Yu. I. Smolin et al. "Structural Types of Rare-Earth Element Diortho(pyro)silicates".
Aerts Renatus
Papanikolau Emmanuel
Van Hal Henricus A. M.
Bell Mark L.
Marcheschi Michael A.
Spain Norman N.
U.S. Philips Corporation
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