Method of preparing storage phosphors from dedicated precursors

Details Method of preparing storage phosphors from dedicated precursors Method of preparing storage phosphors from dedicated precursors

2008-04-01

2008-04-01

Meeks, Timothy (Department: 1792)

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

C427S069000

Reexamination Certificate

active

11015504

ABSTRACT:
A method for producing CsX:Eu stimulable phosphors and screens or panels provided with said phosphors as powder phosphors or vapor deposited needle-shaped phosphors suitable for use in image forming methods for recording and reproducing images of objects made by high energy radiation, wherein said CsX:Eu stimulable phosphors are essentially free from oxygen in their crystal structure, and wherein X represents a halide selected from the group consisting of Br, Cl and combinations thereof, and wherein the method further comprises the steps of mixing CsX with a compound or combinations of precursor compounds having as a composition CsxEuyX′x+αy, wherein the ratio of x to y exceeds a value of 0.25, wherein α≧2 and wherein X′ is a halide selected from the group consisting of Cl, Br and I and combinations thereof; heating said mixture at a temperature above 450° C.; cooling said mixture, and optionally annealing and recovering said CsX:Eu phosphor.

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Patent Abstracts of Japan, Publication No. 2003-201119, published Jul. 15, 2003.
Patent Abstracts of Japan, Publication No. 06-230198, published Aug. 19, 1994.

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