Ion exchange-strengthened silicate glass filter for ultraviolet

Details Ion exchange-strengthened silicate glass filter for ultraviolet Ion exchange-strengthened silicate glass filter for ultraviolet

1975-09-05

1977-05-10

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

65 30E, C03C 330, C03C 304, C03C 2100

Patent

active

040226280

ABSTRACT:
There is provided by the process of the invention a silicate glass which provides protection against mechanical hazards and short and long wavelength ultraviolet radiation while at the same time high transmission of light in the visible range of the spectrum is maintained. By the process of the invention, the incorporation of cerium oxide into the glass followed by ion exchange strengthening using a mixture of potassium salt and silver nitrate provide a synergistic reduction in transmission of light in the ultraviolet range of the spectrum not heretofore obtainable by the use of either cerium oxide or silver staining of the glass alone.

REFERENCES:
patent: 2647068 (1953-07-01), Patai et al.
patent: 3424567 (1969-01-01), Smith
patent: 3495963 (1970-02-01), Buckley et al.
patent: 3533888 (1970-10-01), Eppler et al.
patent: 3790260 (1974-02-01), Boyd et al.
patent: 3898693 (1975-08-01), Faulstrich et al.
patent: 3899315 (1975-08-01), Seigmund
patent: 3923486 (1975-12-01), Kitano et al.

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