Fast response photosensitive opal glasses

Details Fast response photosensitive opal glasses Fast response photosensitive opal glasses

C - Chemistry, Metallurgy

03

C

261/19, 96/76

C03C 4/04 (2006.01) C03C 3/118 (2006.01)

Patent

CA 2020882

Abstract of the Disclosure This invention is directed to photosensitivity opacifi- able glasses requiring very short exposures to ultraviolet radiation to effect the development of opacity therein during a subsequent heat treatment thereof. The glasses consist essentially, expressed in terms of weight percent on the oxide basis, of about 14 18% Na2O, 0-6% ZnO, 6-12% Al2O3, 0-5% B2O3, 65-72% SiO2, and 0-0.2% Sb2O3, and 0.007-0.04% Ag, 0.008-0.05% Ceo2, 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.

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