Preparation of mono-sized zirconia powders

Details Preparation of mono-sized zirconia powders Preparation of mono-sized zirconia powders

C - Chemistry, Metallurgy

01

G

23/252

C01G 25/02 (2006.01)

Patent

CA 1256674

PREPARATION OF MONO-SIZED ZIRCONIA POWDERS ABSTRACT OF THE INVENTION Substantially spherical mono-sized particles of zirconia can be prepared by the forced hydrolysis of an aqueous solution of zirconyl chloride. A zirconyl chloride solution having a molarity up to about 0.4 is heated for at least 72 hours at a temperature of at least 95°C to generate suspended particles of hydrated zirconium oxide, which are recovered and calcined to provide the mono-sized zirconia powders. In preferred embodiments, mono-sized powders of a mixture of zirconia with one or more of its stabilizing metal oxides is prepared by precipitating the metal in the form of its hydroxide onto pre-formed zirconium-containing particles.

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