Preparation of mixed powders

Details Preparation of mixed powders Preparation of mixed powders

C - Chemistry, Metallurgy

04

B

C04B 35/48 (2006.01) B02C 23/18 (2006.01) C04B 35/486 (2006.01) C04B 41/85 (2006.01)

Patent

CA 2113596

ABSTRACT OF THE DISCLOSURE PREPARATION OF MIXED POWDER A method of preparing a mixture of zirconia and a stabilising agent for the zirconia comprises milling an aqueous suspension of particulate zirconia andparticulate stabilising agent in a bead mill for at least 2 minutes in the presence of a particulate mixing medium having an average particle size from 0 2 mm to 3 mm. Preferred stabilising agents are oxides of yttrium, cerium, calcium or magnesium. Surprisingly, ceramics prepared from the product mixture are more resistant to degradation by attack from water above 100°C than are ceramics prepared from coprecipitated powders.

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