Method for producing a terbium activated cerium magnesium alumin

Details Method for producing a terbium activated cerium magnesium alumin Method for producing a terbium activated cerium magnesium alumin

1988-11-23

1989-06-20

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1180

Patent

active

048407470

ABSTRACT:
A method is disclosed for producing a terbium activated cerium magnesium aluminate phosphor which comprises forming a uniform powder blend consisting essentially of in percent by weight from about 73 to about 74 aluminum oxide wherein the aluminum oxide can be alpha aluminum oxide or gamma aluminum oxide or combinations thereof, from about 12 to about 14 cerium oxide, from about 2 to about 3 magnesium, from about 0.3 to about 0.7 fluoride, and from about 6 to about 9 terbium, firing the blend in a non-oxidizing atmosphere at a temperature of from about 1500.degree. C. to about 1800.degree. C. for a sufficient time to produce the phosphor wherein the particle size is no greater than about 5 micrometers in diameter. The phosphor is then cooled and deagglomerated.

REFERENCES:
patent: 4088922 (1978-05-01), Wolfe
patent: 4150321 (1979-04-01), Schetters et al.
patent: 4153572 (1979-05-01), Wolfe
patent: 4631144 (1986-12-01), Beers et al.

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