Reversible light sensitive glass

Details Reversible light sensitive glass Reversible light sensitive glass

1974-04-02

1977-01-04

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106DIG6, C03C 308

Patent

active

040010198

ABSTRACT:
A reversible light sensitive glass comprising 100 parts of a base glass, 0.15 to 1.0 parts of Ag and an amount of halogen corresponding to or more than to the chemical equivalence of Ag, in which the base glass consists of, by weight %, SiO.sub.2 48 to 62, Al.sub.2 O.sub.3 7 to 15, B.sub.2 O.sub.3 17 to 26, R.sub.2 O (where R represents Na, Li or K) 6 to 16, BaO 0.5 to 5, (BaO/R.sub.2 O 0.05 to 0.40), TiO.sub.2 0 to 10, ZrO.sub.2 0 to 10, Nb.sub.2 O.sub.5 0 to 5, TiO.sub.2 +ZrO.sub.2 +Nb.sub.2 O.sub.5 0.5 to 15, AS.sub.2 O.sub.3 0 to 2.0, and Sb.sub.2 O.sub.3 0 to 2.0 (AS.sub.2 O.sub.3 +Sb.sub.2 O.sub.3 <2.0).

REFERENCES:
patent: 3208860 (1965-09-01), Armistead et al.
patent: 3306833 (1967-02-01), O'Leary
patent: 3419370 (1968-12-01), Cramer et al.
patent: 3540793 (1970-11-01), Araujo et al.
patent: 3784386 (1974-01-01), Araujo et al.
patent: 3833511 (1975-08-01), Yamashita et al.

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