Importance

Loading Importance Indicators...

Abstract

A method of preparing colloidal zirconium oxide sols having substantially uniformly spherical particles in the size range of from about 0.01 to about 2.0 microns is described. The process comprises the steps of (A) preparing a liquid mixture comprising at least one zirconium salt and a compatible liquid vehicle; (B) contacting said liquid mixture with an anion exchange resin for a period of time sufficient to form a zirconium hydrate sol having a pH of at least about 5.0; and (C) recovering the zirconium hydrate sol from the resin. Colloidal size zirconium oxide powders can be prepared from the colloidal zirconium oxide sols by drying and calcining the sols at an elevated temperature. The zirconium oxide powders obtained in accordance with the present invention can be stabilized by the incorporation of certain stabilizers such as yttrium oxide, lanthanum oxide, cerium oxide, calcium oxide and magnesium oxide.

Loading the Abstract Image...

First Claim