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以自制Ｚｒ（ＯＣ３Ｈ７）４和Ｙ（ＣＨ３ＣＯＯ）３为原料，应用溶胶－凝胶法（Ｓｏｌ－Ｇｅｌ）制备了ＹＳＺ（ＺｒＯ２－９ｍｏｌ％Ｙ２Ｏ３）凝胶和超细粉末．研究了Ｓｏｌ－Ｇｅｌ形成机理以及ｐＨ值对胶凝时间和凝胶结构的影响．通过ＴＧ－ＤＴＡ、ＸＲＤ等分析手段，研究了从干凝胶到ＹＳＺ超细粉末过程中的反应机理．实验证明：反应可分为３个阶段，钇稳定立方相ＺｒＯ２的合成温度在４７０℃左右
YSZ (ZrO2-9mol% Y2O3) gel and ultrafine powders were prepared by sol-gel method using Zr (OC3H7) 4 and Y (CH3COO) 3 as raw materials. The formation mechanism of Sol-Gel and the influence of pH value on the gel time and gel structure were studied. The reaction mechanism from dry gel to YSZ ultrafine powder was studied by means of TG-DTA and XRD. The experimental results show that the reaction can be divided into three stages. The synthesis temperature of ZrO 3 is about 470 ℃