Reversible light-sensitive glass

Details Reversible light-sensitive glass Reversible light-sensitive glass

1974-07-31

1976-12-21

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106DIG6, C03C 326, C03C 308

Patent

active

039986470

ABSTRACT:
A reversible light-sensitive glass comprising 100 parts of a base glass composition consisting, in weight percent, of 48 to 62% SiO.sub.2, 15 to 22% B.sub.2 O.sub.3, 0 to 7% Al.sub.2 O.sub.3, 0 to 10% ZrO.sub.2, 6<Al.sub.2 O.sub.3 + ZrO.sub.2 <12%, 6 to 16% R.sub.2 O where R represents Li, Na or K, 0.5 to 7% BaO, BaO/R.sub.2 O 0.035 to 0.65, 0 to 2% TiO.sub.2, and 0.002 to 0.03% CuO, and as light-sensitive components, 0.15 to 1.0 part of Ag and more than the chemical Ag equivalent of halogens selected from the group consisting of Cl, Br and I.

REFERENCES:
patent: 3540793 (1970-11-01), Araujo
patent: 3833511 (1974-09-01), Yamashita et al.
Yohota, R., "Phototropic Glass," Kotai Butsuri, 1968 3(5)265-269, in Chem. Abstract vol. 69, 1968, 72798p.

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