Flux for phosphor particle size control

Details Flux for phosphor particle size control Flux for phosphor particle size control

1994-02-07

1995-03-07

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1178

Patent

active

053955544

ABSTRACT:
An improved flux for use in preparing X-ray phosphors comprises an alkali metal sulfate, an alkali metal metaborate and, a strontium halide. By varying the concentration of the metaborate and strontium halide in the flux composition, the size and dry bulk density of the phosphor particles and the speed of the phosphor, respectively, can be controlled. Also disclosed is a process of making phosphors using the above flux, and X-ray intensifying screens containing such phosphors.

REFERENCES:
patent: 4883970 (1989-11-01), Page
patent: 4929386 (1990-05-01), Reddy
patent: 4938890 (1990-07-01), Reddy
patent: 5064729 (1991-11-01), Zegarski
patent: 5132192 (1992-07-01), Sieber et al.
patent: 5141673 (1992-08-01), Zegarski
Bergman et al, Ternary system of lithium and sodium metaborates and sulfates, Chem. Abstructs, vol. 71, 16463e, 1969 no month.
Che et al, Phase diagrams of pseudobinary systems lithium sulfate-lithium borate, Chem. Abstructs, vol. 95, 226562h, 1981 mo month.

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