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.
出处
《稀土》
EI
CAS
CSCD
北大核心
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)
关键词
纳米晶
LA2O3
沉淀法
晶粒度
nanocrystalline La2O3 chemical precipitation grain size
作者简介
姚丽珠（1963-），女，辽宁抚顺人，博士研究生，副教授，研究方向：冶金物理化学。
