Preparation method of rare earth activated alkaline earth...

Details Preparation method of rare earth activated alkaline earth... Preparation method of rare earth activated alkaline earth...

2006-01-31

2008-09-09

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

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

Reexamination Certificate

active

07422705

ABSTRACT:
A preparation method of a precursor of a rare earth activated alkaline earth metal fluorohalide stimulable phosphor is disclosed, comprising (A) adding an aqueous solution of an inorganic fluoride into a mother liquor containing a barium halide to form a reaction mixture containing a precipitate of a precursor of the stimulable phosphor, and (B) removing a solvent from the reaction mixture to obtain a concentrated reaction mixture, wherein the steps (A) and (B) are concurrently performed over periods of a and b, respectively, and meeting the following requirement:in-line-formulae description="In-line Formulae" end="lead"?0.25<a/b<0.95.in-line-formulae description="In-line Formulae" end="tail"?A preparation method of the stimulable phosphor and a radiation image conversion panel using the stimulable phosphor are also disclosed.

REFERENCES:
patent: 6168730 (2001-01-01), Nabeta et al.
patent: 6383412 (2002-05-01), Hasegawa
patent: 6638447 (2003-10-01), Wakamatsu et al.
patent: 11-29324 (1999-02-01), None
patent: 2003-268369 (2003-09-01), None
Translation for JP 11-29324.
Translation for JP 2003-268369, claims and spec.

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