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Stabilized Nanometer-sized Zirconia Powder Prepared by Hydrolysis of Alkoxide

Dai Jian Wen Tinglian Lu Zhiyi (Shanghai Institute of Ceramics,Academia Sinica,200050)  
8mol% Y_2O_3 stabilized zirconia superfine powder prepared by hydrolysis of alkoxide hasbeen studied.The powder fabricated under various conditions of hydrolysis from mixed solu-tion of zirconium isopropoxide and yttrium nitrate in isopropanol was characterized by TEM,specific area and X-ray diffractometry.Grain growth mechanism and dispersion of powder aswell as some preparation parameters which affect them were discussed.The investigated resultsindicated that the pH and H_2O/Zr values of hydrolysis agent have significant effect on Sol-gelpeoccess.Stabilized zirconia powder which has homogeneous composition and less agglomera-tion with size below 10nm can be obtained by means of co-hydrolysis of zirconium alkoxide andinorganic salt of yttrium in isopropanol with basic medium.
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