Process for the production of electroluminescent powders for dis

Details Process for the production of electroluminescent powders for dis Process for the production of electroluminescent powders for dis

1979-06-25

1981-04-21

Cooper, Jack

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 66, 427 68, 427215, 2523016S, B05D 506, C09K 1130, C09K 1150

Patent

active

042633397

ABSTRACT:
A process is provided for producing electroluminescent powders for use in information display panels of the type in which a monoparticle layer of electroluminescent powder is embedded in a high dielectric constant resin between two electrodes. The powders are zinc sulfide powders coactivated with aluminum and capable of emitting white light, as well as light of various colors. In the production of these powders they are treated to form an impermeable inorganic surface coating on the powder particles. The coating may be zinc phosphate or glass.

REFERENCES:
patent: 2704726 (1955-03-01), Markoski
patent: 2782168 (1957-02-01), Fetters
patent: 2874128 (1959-02-01), Wachtel
patent: 3076767 (1963-02-01), Farv et al.
patent: 3984586 (1976-10-01), Kawarada et al.

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