Process for the preparation of phosphor

Details Process for the preparation of phosphor Process for the preparation of phosphor

1983-08-22

1985-07-30

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 11465

Patent

active

045320713

ABSTRACT:
A process for the preparation of a divalent europium activated alkaline earth metal fluorohalide phosphor containing a metal oxide, which comprises firing a mixture of starting materials comprising an alkaline earth metal halide, a trivalent europium compound and a metal oxide source, characterized in that said firing is carried out in at least two stages, and at least a portion of said metal oxide source is added to the fired product obtained after the first firing stage.

REFERENCES:
patent: 4157981 (1979-06-01), Stevels et al.

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