Process for preparing BaFBr:Eu phosphors

Details Process for preparing BaFBr:Eu phosphors Process for preparing BaFBr:Eu phosphors

Filed on

1991-12-24

Date issued

1994-01-18

Examiner

Cooper, Jack

Patent Class

Compositions

SubClass

Inorganic luminescent compositions

SubSubClass

Compositions containing halogen; e.g., halides and oxyhalides

Other Related Categories

C09K 1161

Type

Patent

Status

active

Patent number

052797651

Description

ABSTRACT:
A process for producing BaFBr:Eu phosphors in which a slurry of an Eu halide, BaFBr and BaBr.sub.2 is spray dried to produce spherical agglomerates which are then fired and cooled by an inert atmosphere, washed to remove unreacted BaBr.sub.2 and dried to produce a powder.

REFERENCES:
patent: 4076897 (1978-02-01), Joiner, Jr.
patent: 4157981 (1979-06-01), Stevels et al.
patent: 4524016 (1985-06-01), Ferretti
patent: 4532071 (1985-07-01), Nakamura et al.
patent: 4535237 (1985-08-01), Takahashi et al.
Stevels et al., Phillips Research Report, vol. 30(5), pp. 277-290 (1975).

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