Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1990-06-27
1991-02-05
Cooper, Jack
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C09K 1167
Patent
active
049902822
ABSTRACT:
An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing scandium ions or scandium ions in combination with neodymium ions. Scandium increases speed while reducing afterglow while the further addition of neodymium allows afterglow to be eliminated. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
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RPA-1 Bryan et al. U.S. Ser. No. 305,222, filed Feb. 3, 1989, titled X-Ray Intensifying Screen, Phosphor Composition, and Process of Phosphor Preparation.
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Bryan Philip S.
Jarrold Gregory S.
Lambert Patrick M.
Towers Christine M.
Cooper Jack
Eastman Kodak Company
Thomas Carl O.
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