Method for preparing ultrafine-yttria stable zirconia powder

The invention relates to a method for preparing ultrafine-yttria stable zirconia powder. The method comprises the steps: (1) adding an alkaline reagent into a solution containing Zr and Y, carrying out thorough stirring, and carrying out heating for 36 to 48 hours at the temperature of 100 DEG C to 120 DEG C so as to form white precipitates in the solution; (2) carrying out heat preservation on the white precipitates prepared in the step (1) for 24 to 48 hours at the temperature of 150 DEG C to 180 DEG C; and (3) cleaning the white precipitates subjected to heat preservation treatment in the step (2), and then, carrying out calcination at the temperature of 900 DEG C to 1,200 DEG C, thereby obtaining the yttria stable zirconia powder. 本发明涉及种超细氧化钇稳定氧化锆粉体的制备方法，所述方法包括：1）向含有Zr、Y的溶液中加入碱性试剂，充分搅拌并在100～120℃加热36～48小时，溶液中形成白色沉淀；2）将步骤1）制备的白色沉淀在150℃～180℃下保温24～48小时；3）将步骤2）中经保温处理的白色沉淀洗净后，在900～1200℃下煅烧得到氧化钇稳定氧化锆粉体。