Phosphor which emits light by the excitation of X-ray

Details Phosphor which emits light by the excitation of X-ray Phosphor which emits light by the excitation of X-ray

1989-03-16

1990-09-25

Cooper, Jack

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

2523014R, C09K 1178

Patent

active

049591746

ABSTRACT:
The phosphor and the X-ray intensifying screen according to the present invention emit light by the excitation of X-rays and they are used for medical and industrial radiography. In addition to the conventional contents of rare earth tantalate and/or rare earth niobate, the phosphor according to the present invention contains a determined quantity of divalent metal. This divalent metal content can make the improvement of the afterglow characteristic and the light emission characteristic of the phosphor.
The phosphor according to the present invention is represented by the general formula (I)

REFERENCES:
patent: 3459674 (1969-08-01), Emoto et al.
patent: 3758486 (1973-09-01), Ropp
patent: 4032471 (1977-06-01), Luckey
patent: 4225653 (1980-09-01), Brixner
patent: 4473513 (1984-09-01), Cusano et al.

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