Zinc sulfide phosphor coactivated with copper and aluminum

Details Zinc sulfide phosphor coactivated with copper and aluminum Zinc sulfide phosphor coactivated with copper and aluminum

1976-06-17

1978-05-09

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Screen

313470, H01J 2920, H01J 3120

Patent

active

040889211

ABSTRACT:
A green emitting ZnS: Cu, Al cathodoluminescent phosphor having x and y coordinate values of from 0.250 to 0.280 and 0.560 to 0.615 respectively, is produced by a critical firing schedule exemplified by slow heating to about 1000.degree. C, soaking at this temperature for about 1 hour, followed by slow cooling at about 3.degree. C per minute to 700.degree. C, followed by air quenching. The phosphor is useful for example, in tri-color television color television cathode ray tubes.

REFERENCES:
patent: 2623858 (1952-12-01), Kroger
patent: 2743240 (1956-04-01), Froelich
patent: 3595804 (1971-07-01), Martin
"Optical Characteristics of Cathode Ray Tube Screens," JEDEO publication No. 16-B; p. 16 cited.

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