Process for the preparation of an yttrium and rare earth...

Details Process for the preparation of an yttrium and rare earth... Process for the preparation of an yttrium and rare earth...

C - Chemistry, Metallurgy

09

K

C09K 11/78 (2006.01)

Patent

CA 2693928

The invention concerns a process for the preparation of an yttrium and at least one rare earth mixed oxide which comprises the following steps: (a) mixing a precursor of the yttrium and at least one rare earth mixed oxide with a flux comprising a barium halide and a boron compound; (b) calcining the mixture of step (a) to obtain said mixed oxide. This mixed oxide may be used as a phosphor in the manufacture of coloured fluorescent lamps, cathode ray tubes (CRT) and plasma display panels (PDP).

L'invention porte sur un procédé de préparation d'un oxyde mixte d'yttrium et d'au moins une terre rare. Ce procédé comprend les étapes suivantes: a. mélange d'un précurseur de l'oxyde mixte d'yttrium et d'au moins une terre rare avec un fondant comprenant un halogénure de baryum et un composé du bore; b. calcination du mélange de l'étape a pour obtenir ledit oxyde mixte. Cet oxyde mixte peut être utilisé comme matière luminescente dans la fabrication de lampes à fluorescence colorée, de tubes à rayons cathodiques et de panneaux d'affichage plasma.

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