Gray body colored zinc sulfide activated with copper

Details Gray body colored zinc sulfide activated with copper Gray body colored zinc sulfide activated with copper

1985-07-09

1987-07-21

Doll, John

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428690, 2523016S, 106302, 106304, 106308B, 106293, B32B 900

Patent

active

046818073

ABSTRACT:
A catholuminescent material consisting essentially of particles of copper-activated zinc sulfide cathodoluminescent phosphor having at least a partial coating of a mixture of a blue pigment of cobalt aluminate and a red pigment of iron oxide wherein the weight ratio of said blue pigment to said red pigment is from about 3.5:1 to about 4.5:1 and the weight percent of said pigments are from about 0.2% to about 2% by weight of catholuminescent phosphor. A process for producing said pigmented phosphor comprises forming the appropriate aqueous slurries by proper pH control and then by the addition of colloidal silica, the pigment is coated onto the phosphor particles.

REFERENCES:
patent: 3522071 (1966-08-01), Yokota et al.
patent: 3657142 (1972-04-01), Poss
patent: 3875449 (1975-04-01), Byler et al.
patent: 4103069 (1978-07-01), Schulze et al.
patent: 4208461 (1980-05-01), Vanderpool
patent: 4544605 (1985-10-01), Miazaki et al.

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