以碳酸铈为前驱体制备超细氧化铈及其抛光性能

Preparation and Polishing Property of Ultra Fine Ceria Using Hydrate Cerium Carbonate as Precursor

研究了以水合碳酸铈为前驱体，采用直接球磨和煅烧的方法制备了中位粒径小于3μm的超细氧化铈。结果表明：所得产物均具有立方萤石型结构，随着煅烧温度的升高，产物粒径呈下降趋势，粒度分布也越来越窄，结晶度提高。但对三种不同玻璃的抛光能力均在900℃～1000℃之间呈现出极大值。因此认为抛光过程中玻璃表面物质的去除速率受抛光粉粒度、结晶度和表面活性的影响较大。

Ultra fine ceria with medium particle size less than 3μm was prepared directly by milling and calcining hydrate cerium carbonate. It was found that all the ceria obtained possesses cubic fluorite structure, and the crystallinity was improved with pyrolysis temperature increasing, which results in the decrease of particle size and narrower grain size distribution. However, the polishing ability for three different optical glasses all displayed an maximurn value between 900℃～1000℃. These facts indicate that the material removal rate on glass surface was influenced comprehensively by particle size, erystalinity and the surface activity.