Method of preparing high brightness, small particle red-emitting

Details Method of preparing high brightness, small particle red-emitting Method of preparing high brightness, small particle red-emitting

1998-01-22

2000-03-28

Koslow, C. Melissa

Compositions

Inorganic luminescent compositions

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

C09K 1163, C09K 1177

Patent

active

060427477

ABSTRACT:
Improved yttrium, gadolinium borate phosphor particles are produced by thermal decomposition of gels/solutions comprising yttrium, gadolinium and europium salts in the form of gels or solutions and an organic precursor such as trimethyl borate at a temperature well below the normal temperature of solid state reaction. The phosphor of the present invention has the empirical formula:

REFERENCES:
patent: 4202794 (1980-05-01), Lehmann
patent: 5776368 (1998-07-01), Chau
M. Kotaisamy et al.; On the Formation of Flux Grown Y.sub.2 O.sub.2 S:Eu.sup.3+ Red Phosphor; J. Electrochem. Soc., 142 3205, Sep. 1995.
R.P. Rao; Preparation and Characterization of Fine-Grain Yttrium-Based Phosphors by Sol-Gel Process; J. Electrochem. Soc., 143 189, Jan. 1996.
T.R.N. Kutty et al.; Luminescence of Eu2+ In Stronium Aluminates Prepared by the Hydro-thermal Method; Mat. Res. Bull., 25 (1990) 1355.

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