摘要
以普通La2O3,硝酸,聚乙二醇为原料,利用溶胶-凝胶法制备了纳米La2O3粉体,利用TG-DTA,XRD,TEM等各种测试方法对干凝胶300℃灼烧所得前驱体粉末的分解过程及最终形成的纳米氧化镧粉体进行了分析和表征,并研究了浓度、搅拌和分散剂聚乙二醇(PEG)添加量等因素的改变对La2O3 粉体的粒径、形态的影响。实验结果表明,在适当工艺参数下,可以制得平均粒径小于50 nm 的La2O3粉体。
Nanocrystalline La2O3 was prepared by sol-gel process using common La2O3, HNO3 and PEG The decomposition process of the precursor powder and the calcened nanocrystalline La2O3 formed at the end were charactered with various techniques: TG-DTA, XRD and TEM and the effects of some factors such as pH value of the solution, stirring rate and the amount of the PEG in the solution on the particle size and morphology are investigated. The result shows that the nanocrystalline La2O3 can be obtained with particle diameter of 30 nm similar to 50 mn under appropriate conditions.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第3期425-428,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(50071043)
关键词
纳米La2O3
溶胶
凝胶法
稀土
nanocrystalline
La2O(3)
method of sol-gel
rare earths
