Method of preparing cerium-activated yttriumaluminate phosphor o

Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides

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C09K 1146

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040703010

ABSTRACT:
A cerium-activated yttriumaluminate phosphor such as YA10.sub.3 :Ce featuring an enhanced luminous intensity is produced by adding a barium compound exemplified by BaO, BaCO.sub.3, Ba(OH).sub.2 and BaF.sub.3 to a mixture of source materials of the host material and the activator and baking the resulting mixture at a usual temperature ranging from 1000.degree. to 1400.degree. C. The barium compound preferably amounts to 0.001-8 mol% of the yttriumaluminate and may alternatively be introduced into a preliminarily baked and pulverized mixture of the source materials.

REFERENCES:
patent: 2590411 (1952-03-01), Isenberg
patent: 3623994 (1971-11-01), Martin
Koga I "Chem. Abstracts", vol. 81, 1974, 97027.
Koga II "Chem. Abstracts", vol. 81, 1974, 97664c.

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