摘要：对溶胶 -凝胶法进行改性 ,使凝胶聚沉为沉淀物 ,进而可以成功地合成ZrO₂(9%Y₂O₃)纳米粉体。采用热重 -差热(TG -DTA)分析、粒度分布分析、透射电子显微镜(TEM)和X射线衍射(XRD)测试法对粉料制备工艺过程进行了研究。结果表明 ,改性的溶胶 -凝胶法在聚沉前加入分子量大小不同的表面活性剂 ,聚沉后采用无水乙醇超声分散 ,可以有效地消除团聚现象。沉淀产物在450℃以下可以完全分解为ZrO₂（Y₂O₃）粉体 ,600℃煅烧颗粒晶粒度为14nm。

关键词： 溶胶-凝胶法；氧化锆；纳米晶粉体

Abstract: ZrO₂（9mol％ Y₂O₃） nano-crystal powders is prepared by modified sol－gel method massing the gel to precipitate before being dried．The characteristic of powders is analyzed using TG－DTA granulometer CILASTEM and XRD．The results show that the dispersibility of particles can be improved effectively using disperser of different molecular weight before massing and ultrasonic washing with absolute ethyl alcohol after massing．The synthesized precipitate decomposed completely to ZrO₂（Y₂O₃） powders below 450℃ and the crystal size of produced powders calcined at600℃ is14nm．

Keywords:sol－gel method；zirconia；nano-crystal powders