Green-luminescing zinc sulphide and cathode ray tube provided wi

Details Green-luminescing zinc sulphide and cathode ray tube provided wi Green-luminescing zinc sulphide and cathode ray tube provided wi

1994-09-22

1996-09-24

Bonner, Melissa

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

25230145, C09K 1156, C09K 1154

Patent

active

055588174

ABSTRACT:
The invention relates to a luminescent zinc sulphide of cubic structure (sphalerite) which is so activated by aluminum and copper that a green-emitting luminescent material is created. In a simple manufacturing process, high x-values of the colour point and high luminous efficacy values are achieved in that copper is added in a quantity of 200 to 450 mole ppm and aluminum in a quantity of 700 to 2000 mole ppm.

REFERENCES:
patent: 4038205 (1977-07-01), Minnier et al.
patent: 4740728 (1988-04-01), Uchida et al.
patent: 4925593 (1990-05-01), Borchardt et al.

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