纳米La_2O_3粉晶的制备及其表征  

Preparation and Characterization of Nanocrystalline La_2O_3

作　　者：姚丽珠[1,2] 田彦文[1] 储刚[3] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [3]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001

出　　处：《稀土》2009年第6期35-38,共4页Chinese Rare Earths

基　　金：国家高技术研究发展计划项目资助(2005AA001510)

摘　　要：以La(NO3)3.6H2O、NH4HCO3和聚乙二醇为原料,利用沉淀法制备了纳米La2O3粉体,利用XRD,TG-DTA和TEM等测试方法对干凝胶热分解过程及最终形成的纳米La2O3粉体进行了分析和表征,XRD法考察了前驱体在不同热处理条件下产物物相和晶粒度的变化情况,实验结果表明,在适当工艺参数下,前驱体经720℃,1h焙烧所得产物为平均粒径小于50nm的La2O3粉体。Nanocrystalline La2O3 was prepared by chemical precipitation process using La（NO3）3·6H2O,NH4HCO3 and PEG.The decomposition process of xerogels powder and the calcened nanocrystalline La2O3 formed at the end were characterized by XRD,TG-DTA and TEM.The component and size of the product were characterized by X-ray diffraction（XRD） under different conditions of heat treatment.The result shows that the nanocrystalline La2O3 can be obtained with average particle diameter of 50nm under appropriate conditions.

关 键 词：纳米晶 LA2O3 沉淀法 晶粒度 

分 类 号：O614.33[理学—无机化学]