微波辅助溶胶-凝胶法制备CeO_2粉体及其生长机制研究  

Preparation and growth mechanism of CeO_2 particles with controlled morphology via microwave assisted sol-gel method

作　　者：王芬[1] 杨彦青[1] 薛绪平[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2013年第3期33-36,共4页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51072109)

摘　　要：稀土氧化物CeO2粉体是极具应用前景的轻稀土材料,其新的用途不仅与其化学组成、纯度有关,而且与CeO2粒子的大小、形貌、分散性等指标密切相关,这对CeO2粉体制备过程的控制提出更高的要求.以六水硝酸铈为铈源,选择柠檬酸作为配体,采用微波辅助法通过对制备条件的控制得到了不同形貌的CeO2粉体,并应用X射线分析(XRD)、扫描电镜分析(SEM)等表征方法对产物的结构进行了分析,对不同形貌的CeO2粉体的形成机理进行了研究.Cerium oxide as a kind of important light rare earths product have become a materi- al with the great application prospect. Its high-performance not only has something to do with its chemistry constitute and pure degree, but also with the index of size, morphologies and decentrality of Ce02 particles, that bring forward the higher request to control the prepa- ration process of CeO2 particles . In this paper, the CeO2 particles with different morpholo- gies were obtained by controlling the preparation condition using nitric acid cerium as a raw material and choosing citric acid as a ligand by microwave assisted method. The structure and performance of products were studied by means of XRD, SEM and so on. The formation mechanism of the CeO2 particles with different morphologies were studied as well.

关 键 词：微波辅助法 溶胶-凝胶法 二氧化铈 生长机制 

分 类 号：O614[理学—无机化学]