Process of making tantalate X-ray phosphors

Details Process of making tantalate X-ray phosphors Process of making tantalate X-ray phosphors

1992-12-16

1994-05-10

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1167

Patent

active

053105052

ABSTRACT:
An improved flux for use in preparing X-ray phosphors comprises an alkali metal sulfate, an alkali metal metaborate and, optionally 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

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