前驱体固相法制备纳米ZrO_2(4Y)粉体

Characterization and Preparation of Nanometer ZrO_2(4Y) Powder by Precursor Solid Phase Reaction

采用共结晶的方法制备出氯化钇和氯氧化锆的复合晶体作为反应物，机械固相法合成出前驱体ZrOC2O4（4Y），在不同条件下煅烧，得到纳米ZrO2（4Y）粉体，研究前驱体中引入Y对前驱体的热分解过程和ZrO2粉体的晶相影响。结果表明，600℃煅烧2h的可以得到粒度分布均匀、纯度高、类球形结构、晶相稳定的ZrO2（4Y）粉体，晶粒尺寸15-30hm，Y的引入对稳定ZrO2的四方相有很重要的作用。固相反应合成法具有操作简便、资源可循环利用、对环境污染小等优点，是一种绿色合成方法。

The precursor ZrOC2O4（4.0mol% Y） is synthesized by mechanical solid-phase reaction, the reactant is the complex crystalline prepared by cocrystallization of YCl3 and ZrOCl2. Nanometer ZrO2（4Y） powder is obtained by calcined the precursor in different condition. The effect of Y introduction to the precursor on the process of thermal decomposition and system of ZrO2 powder is systematically investigated. The results show that the stable, well particle size distribution and spherical ZrO2（4Y） powder with high purity is achieved by 600℃ sintering for2h, the mean diameter of the product is about 15-30nm, the introduction of Y is very important to the stability of tetragonal. Compared to the traditional chemical methods, this method is a clean method with convenient for operation, source recycle and a few environmental pollutions.