Production of spherical ceramic powders

Details Production of spherical ceramic powders Production of spherical ceramic powders

B - Operations, Transporting

01

J

134/53

B01J 13/00 (2006.01)

Patent

CA 2016285

ABSTRACT OF THE DISCLOSURE A sol-gel method is employed to produce ceramic oxide spheres from precursors thereto. An alkanol of the sol precursor(s) is introduced to an immiscible hydrophilic liquid phase to cause spheroidizing of the sol. Moisture, which initially may be present in the immiscible liquid or may subsequently be added, is employed to effect hydrolysis of the precursor to oxide form. The ceramic oxide spheres are recovered from the liquid phase and calcined to their final form.

Utilisation d'une méthode sol-gel pour l'obtention de sphères d'oxyde céramique à partir de leurs précurseurs. Un alcanol du ou des précurseurs de sol est introduit dans une phase liquide hydrophile non miscible pour la sphéroïdisation du sol. L'humidité, qui peut être présente initialement dans le liquide non miscible ou qui peut être ajoutée ultérieurement, sert à hydrolyser le précurseur en oxyde. Les sphères d'oxyde céramique sont récupérées à partir de la phase liquide et calcinées pour l'obtention de la forme finale.

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