Colored photosensitive opal glasses

Details Colored photosensitive opal glasses Colored photosensitive opal glasses

1989-11-13

1991-05-28

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 32, C03C 404, C03C 1400

Patent

active

050195387

ABSTRACT:
This invention is directed to photosensitively opacifiable glasses consisting essentially, in weight percent, of about 14-18% Na.sub.2 O, 0-6% Zno, 6-12% Al.sub.2 O.sub.3, 0-5% B.sub.2 O.sub.3, 0-0.2% Sb.sub.2 O.sub.3, 0-0.1% SnO, 65-72% SiO.sub.2, and 0.007-0.04% Ag, 0.008-0.05% CeO.sub.2, 0.7-1.25% Br, and 1.5-2.5% F as analyzed in the glass, the sum of those components constituting at least 90% of the total composition, which, through an exposure to ultraviolet radiation, followed by a three-step heat treatment, and then a re-exposure to ultraviolet radiation at an elevated temperature, can be converted into a colored opal glass.

REFERENCES:
patent: 2651145 (1953-09-01), Stookey
patent: 2684911 (1954-07-01), Stookey
patent: 4017318 (1977-04-01), Pierson et al.
patent: 4092139 (1978-05-01), Ference
patent: 4118214 (1978-10-01), Wedding
patent: 4130680 (1978-12-01), Ference et al.

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