本文以水解法、沉淀法,水热法等三种方法制备了Y_2O_3稳定的ZrO_2超微粉末(UFP),对三种化学方法作了综合比较,并确定了制备Y_2O_3稳定的ZrO_2UFP工艺流程。作者认为,水解法较为适宜,在800℃灼烧,粒度较小,结晶度较高。透射电镜观测到该法合成的粉末粒度<0.1μm,XRD分析结果证明Y_2O_3稳定的ZrO_2UFP属立方晶系。 In this paper, Y2O3 stabilized ZrO2 powder (UFP) was prepared by hydrolysis, precipitation and hydrothermal methods. The three chemical methods were compared comprehensively, and the process of preparing Y2O3 stable ZrO2-UFP was confirmed. The authors believe that the hydrolysis method is more appropriate, burning at 800 ℃, smaller particle size, higher crystallinity. The particle size of the powder synthesized by the method was less than 0.1μm by TEM. The results of XRD showed that the Y_2O_3-stabilized ZrO_2UFP belongs to the cubic system.