Method of making terbium activated yttrium aluminate phosphor

Details Method of making terbium activated yttrium aluminate phosphor Method of making terbium activated yttrium aluminate phosphor

1987-07-23

1988-08-09

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1180

Patent

active

047626399

ABSTRACT:
A Y.sub.3 Al.sub.5 O.sub.12 :Tb and method for producing the phosphor are disclosed. The method invloves forming a uniform mixture of source materials for Y.sub.3 Al.sub.5 O.sub.12 :Tb phosphor and barium fluoride with the barium fluoride being present in the mixture at a level of from about 0.254 to about 7.61 weight percent, and firing the mixture at an elevated temperature to react the source material to form the phosphor. The phosphor has an improved brightness of at least about 75% over a phosphor of the same type produced without the barium fluorides.

REFERENCES:
patent: 4469619 (1984-09-01), Ohno et al.
Ohno et al., II, "J. Electrochem. Soc.", 1986, vol. 133, No. 3, pp. 638-643.

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