Coated phosphors, method for producing same and articles employi

Details Coated phosphors, method for producing same and articles employi Coated phosphors, method for producing same and articles employi

1982-02-12

1984-09-25

Silverberg, Sam

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

427 64, 427 68, 428404, 313466, 430271, 430 28, B05D 506

Patent

active

044736347

ABSTRACT:
The red and blue color cathode ray tube phosphors for color television are pigmented with a coating of an aqueous-insoluble silicate-based glass matrix containing pigment particles. When incorporated into a tridot color cathode ray tube, the contrast of the tube is improved. The coated particles are formed by dispersing the particles in a slurry with a silicate, the pigment particles and an optional wetting agent, and evaporating the slurry to dryness. The dried coated particles are then heated in order to insolubilize the glass matrix, and soluble ions are then removed by washing.

REFERENCES:
patent: 3544354 (1970-12-01), Kachel
patent: 4020231 (1977-04-01), Hedler
patent: 4128674 (1978-12-01), Hedler
patent: 4287229 (1982-09-01), Watanabe

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