Process for producing phosphor

Details Process for producing phosphor Process for producing phosphor

1990-11-23

1991-09-24

Cooper, Jack

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

2523016P, C09K 1162

Patent

active

050512030

ABSTRACT:
A phosphor producing process capable of providing a phosphor of good quality in a reduced period of time. A Li compound acting as a doping agent is added prior to primary calcination so that it may also act as a flux and removed by washing prior to secondary calcination. A ZnO.Ga.sub.2 O.sub.3 solid solution thus obtained is activated in the secondary calcination using an atmosphere in which reducing gas and Zn gas are mixed. Thus, a ZnO.Ga.sub.2 O.sub.3 :Li, P phosphor is which the molar ratio between Zn and Ga.sub.2 O.sub.3 is 1:1 and of which crystals exhibit good surface conditions can be produced in a reduced period of time.

REFERENCES:
patent: 4100454 (1978-07-01), Hase et al.
patent: 4791336 (1988-12-01), Morimoto et al.

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