Process of preparing tantalate X-ray intensifying phosphors with

Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides

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2504581, 428690, C09K 1167

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active

056119607

ABSTRACT:
The delayed fluorescence observable with tantalate phosphors is decreased by the use of a flux composition consisting essentially of 2-95% by weight KCl, 5-98% by weight of at least one lithium salt chosen from a group consisting of LiCl and Li.sub.2 SO.sub.4 and 0-50% by weight of SrCl.sub.2.

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Brixner, L.H. et al., "On the Structural and Luminescent Properties of the M'LnTaO.sub.4 Rare Earth Tantalates," Chemical Etching Characteristics, vol. 130, No. 12, pp. 2435-2443, Dec. 1983.

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