纳米微反应器法制备球形超细氧化锆粉体

以水/环已烷/曲拉通-100/正己醇四元油包水微乳体系中的微乳液滴为纳米微反应器,通过微反应器中增溶的锆盐和沉淀剂发生反应,制备球形超细氧化锆粉体.实验结果表明,微乳体系中的锆盐浓度、水与表面活性剂的摩尔比以及煅烧温度等对粉体的最终特性有较大影响.对获得的粉体采用激光散射法粒度测试、BET法比表面积分析、XRD物相分析、SEM、TEM形貌观察等方法进行表征.

Preparation of Ultrafine Zirconia Spherical Powder by Nano-reactor of Microemulsion

The water droplets in the microemulsion system of water/cyclohexane/hexyl alcohol/ Triton-100 can be seen as the naono reactors which solubilize zirconium oxychloride and ammonia separately. The precipitation reactions will take place in the confined spaces determined by the droplets size. The minute original reactors help us obtain ultrafine spherical zirconia powder with uniform diameter distribution and good calcination activity. A variety of synthesis parameters for the preparation process were investigated. The results show that the concentration of zirconium oxychloride, molar ratio of water to surfactant (W) and calcination temperature are the predominant factors to determine powder's performance.