Granular lanthanum/cerium/terbium/mixer phoshates having charact

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

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423263, C09K 1183

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active

057469440

ABSTRACT:
Monodisperse particulates of lanthanum/cerium/terbium phosphates, the average particle size of which ranging from 1 to 15 -microns and preferably from 2 to 6 microns, and having a dispersion index of less than 0.5, preferably less than 0.4, are well suited as green luminophors displaying enhanced brilliance or precursors thereof, and are prepared via precipitation with phosphate ions at a substantially constant pH below 2, from LaCeTb solutions.

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