采用非线性加热法煅烧锆、钇的草酸盐前驱体, 制备了8%Y2O3(摩尔分数)稳定ZrO2(8YSZ)超细粉末. 研究了金属离子与草酸的摩尔比及热处理方法对8YSZ的晶体结构、晶粒大小、形貌、比表面积、粒子团聚的影响. 通过改变不同温度范围的加热速度来优化草酸盐前驱体热分解工艺. 采用优化前驱体热分解工艺即非线性加热法, 于600～700.℃煅烧得到的粉末为等轴晶形, 粒子大小在90～100.nm之间, 粒子间仅有较弱的软团聚. 煅烧过程晶粒生长动力学的研究表明: 当煅烧温度高于700.℃时, 晶粒生长的质量传输受晶粒扩散过程控制; 低于700.℃时, 晶粒生长的质量传输由表面扩散过程控制.
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