Method of preparing cerium-activated yttrium silicate phosphor

Details Method of preparing cerium-activated yttrium silicate phosphor Method of preparing cerium-activated yttrium silicate phosphor

1976-06-07

1977-10-04

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1146

Patent

active

040523292

ABSTRACT:
In the firing of a cerium-activated Y.sub.2 O.sub.3 -SiO.sub.2 system phosphor such as Y.sub.2 SiO.sub.5 :Ce and Y.sub.2 Si.sub.2 O.sub.7 :Ce, the improvement of adding BaF.sub.2 in a mol ratio of BaF.sub.2 /Y.sub.2 O.sub.3 of 0.01-0.1 is disclosed which increases the luminosity, emission intensity or both of the phosphor. Phosphors having improved properties are conveniently prepared according to the disclosed process.

REFERENCES:
patent: 2975143 (1961-03-01), Hoekstra
patent: 3157602 (1964-11-01), Ropp
patent: 3523091 (1970-08-01), McAllister
patent: 3814967 (1974-06-01), Takata et al.
Bondar et al., "Isv. Akad. Nauk SSSR, Ser. Fiz", 33(6) pp. 1057-1061, 1969.
Morozova et al., "Chem. Abstracts", vol. 71, 1969, p. 65732a.
Fukuda et al., "Chem. Abstracts", vol. 81, 1974, p. 179786h.

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