Method of making YTaO.sub.4 :Nb phosphor with improved brightnes

Details Method of making YTaO.sub.4 :Nb phosphor with improved brightnes Method of making YTaO.sub.4 :Nb phosphor with improved brightnes

1990-02-20

1990-07-03

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1178

Patent

active

049388908

ABSTRACT:
A method of making a niobium activated yttrium tantalate x-ray phosphor using a lithium chloride-lithium sulfate eutectic flux is disclosed. The mole ratio of the flux is 46.5 mole percent lithium chloride to 53.5 mole percent lithium sulfate. Use of this flux improves phosphor brightness by up to 18%, reducing the x-ray dosage to the patient.

REFERENCES:
patent: 3758486 (1973-09-01), Ropp
patent: 4225653 (1980-09-01), Brixner

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