Process of preparing tantalate X-ray intensifying phosphors with

Details Process of preparing tantalate X-ray intensifying phosphors with Process of preparing tantalate X-ray intensifying phosphors with

1990-12-17

1992-08-25

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

2504831, C09K 1178

Patent

active

051416735

ABSTRACT:
A process for preparing X-ray intensifying M' monoclinic tantalate phosphors by firing precursor oxides in a novel flux mixture of alkali metal sulfate/alkali metal or alkaline earth chloride/alkali metal metasilicate. Tantalate phosphors made in this manner have improved X-ray to light conversion efficiency. X-ray intensifying screens made from these phosphors have improved speed and can be used with good results with a plurality of X-ray film elements.

REFERENCES:
patent: 3650975 (1972-03-01), Yale
patent: 4225653 (1980-09-01), Brixner
patent: 4929384 (1990-05-01), Reddy
patent: 4938890 (1990-07-01), Reddy
patent: 4959174 (1990-09-01), Nakajima et al.
patent: 4970024 (1990-11-01), Reddy, II

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