METHOD FOR MANUFACTURING STABILIZED ZIRCONIA POWDER AND PRECURSOR THEREOF

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PROBLEM TO BE SOLVED : To provide a method for inexpensively manufacturing stabilized zirconium powder having excellent sinterability in a low temperature range and stable quality and a precursor thereof, using an acidic aqueous solution as a starting material. SOLUTION : A compound containing one or two or more stabilizing elements selected from the group consisting of a rare earth element, magnesium and aluminium and a compound containing a sulfate ion are dissolved in an aqueous solution having a mole ratio of Zr/Cl adjusted by dissolving a zirconium carbonate in an aqueous solution in which zirconium oxychloride is dissolved. The obtained aqueous solution is heated to deposit a basic sulfate of zirconium, and then the sulfate ion of the deposit of the basic sulfate of zirconium is substituted with a hydroxyl ion to produce a hydroxide of zirconium. A hydroxide of the stabilizing element and the hydroxide of zirconium are subjected to coprecipitation to obtain a precursor of stabilized zirconia powder, which is burned to obtain stabilized zirconium powder. COPYRIGHT : (C)2014, JPO&INPIT