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采用硝酸铈为原料,聚乙烯吡咯烷酮为添加剂水热法合成CeO_2前驱体,所得前驱体在不同温度下煅烧制备CeO_2抛光粉,研究了煅烧温度对产品物性和抛光性能的影响。结果表明:水热合成的前驱体为直径~100 nm的类球形均匀颗粒;随煅烧温度的升高,产品结晶度提高,粒度逐渐增大,对K9玻璃的材料去除率先增大而后降低,在1050℃达到极大值。为此,确定了合成中位粒径在200~400 nm之间的CeO_2高效抛光粉的最佳条件。
CeO_2 precursor was prepared by hydrothermal method using cerous nitrate as raw material and polyvinylpyrrolidone as additive. The obtained precursor was calcined at different temperatures to prepare CeO_2 polishing powder. The effect of calcination temperature on physical properties and polishing performance was studied. The results show that the hydrothermally synthesized precursors are spherical and uniform particles with a diameter of ~ 100 nm. With the calcination temperature increasing, the crystallinity of the product increases and the particle size gradually increases. The material removal rate of K9 glass first increases and then decreases. 1050 ℃ reach the maximum value. For this purpose, the optimal conditions for the synthesis of CeO 2 high efficiency polishing powders with a median diameter between 200 and 400 nm were determined.