Red pigment-coated phosphor and method of producing the same

Details Red pigment-coated phosphor and method of producing the same Red pigment-coated phosphor and method of producing the same

1978-11-16

1980-06-24

Cooper, Jack

Stock material or miscellaneous articles

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

Particulate matter

427218, 2523014S, 313468, H01J 2928, H01J 2920, C09K 1146

Patent

active

042095670

ABSTRACT:
A red emitting phosphor having a low luminous reflectance, comprising a rare earth element-based phosphor body activated by europium and a red pigment coated on the phosphor body, is disclosed, the pigment being formed of indium sulfide or of a combination of indium sulfide and an alkali metal sulfate. The phosphor is produced by coating the phosphor body with a complex compound containing of indium sulfide and an alkali metal sulfide, followed by baking in an oxygen containing atmosphere at 400.degree. to 600.degree. C. so as to convert the complex compound into a red pigment consisting of indium sulfide and an alkali metal sulfate.

REFERENCES:
patent: 2858234 (1958-10-01), Ishler et al.
patent: 3114065 (1963-12-01), Kaplan
patent: 3308326 (1967-03-01), Kaplan
patent: 4021588 (1977-05-01), Royce et al.
patent: 4081398 (1978-03-01), Hase et al.

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