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中文摘要：
以Ce（NO3）3·6H2O和草酸二甲酯（DMO）为原料，采用均相沉淀法制备超细CeO2粉体。借助TEM、SEM、XRD及DTA-TG等测试手段，观察分析并研究了初生、反应30min及反应2h的CeO2前驱体，干燥并500℃焙烧得到的最终产物——超细CeO2粉体的制备过程。结果表明：CeO2前驱体Ce2（C2O4）3·10H2O的形成与最终产物CeO2在形状上相似，说明形貌有一定的遗传继承性，故可通过控制反应条件来控制前驱体的形貌及大小，达到控制最终产物的目的。制备了块状的、分散均匀良好的，粒径大小约为1μm的超细CeO2粉体。
英文摘要：
Ultra-fine CeO2 powder was prepared by using Ce （NO3 ）2 ·6H2O as a source and dimethyl oxalate （DMO） as an intei＇nal precipitator. The precursor suspension at different reaction time and subsequent calcination powders were analyzed by XRD, TEM, ED and SEM. The results show that calcined cerium powders are similar in the size and morphology to the precursors Ce2 （C2O4 ）3·10H2O·Namely, the size and morphology of CeO2 inherit the precursors. Accordingly, it＇ s possible to control the reaction condition so as to dominate the final outcomes. In this way, the particle morphology of prepared CeO2 powders is block-like with the size of about 1 p.m and dispersed equably.
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