Yttrium tantalate x-ray phosphors with increased luminance and p

Details Yttrium tantalate x-ray phosphors with increased luminance and p Yttrium tantalate x-ray phosphors with increased luminance and p

1997-08-01

1998-06-09

Bonner, Melissa

Compositions

Inorganic luminescent compositions

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

2523014R, C09K 1178

Patent

active

057628270

ABSTRACT:
A monoclinic M' yttrium tantalate x-ray phosphor containing a dopant selected from silicon or germanium to increase phosphor particle size and/or brightness. The phosphor is made by adding a silicon- or germanium-containing compound and a flux to the mixture of raw materials formulated to make the phosphor and then firing the doped mixture at a temperature and for a time sufficient to make the phosphor.

REFERENCES:
patent: 4225653 (1980-09-01), Brixner
patent: 4925702 (1990-05-01), Reddy
patent: 4959174 (1990-09-01), Nakajima et al.
patent: 5009807 (1991-04-01), Reddy
patent: 5112524 (1992-05-01), Reddy et al.
patent: 5380463 (1995-01-01), Reddy et al.

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