溶胶-凝胶法制备纳米Y2O3粉体
Preparation of nano-sized Y2O3 powders by sol-gel method
徐国纲 1张旭东 1何文 1李红 1孟霞1
作者信息
- 1. 山东轻工业学院,材料科学与工程系,济南,250100
- 折叠
摘要
为了改善Y2O3粉体的分散性,提高其烧结活性,试验以三乙醇胺和氨水为凝胶剂,利用溶胶-凝胶方法合成了纳米级Y2O3粉体,采用差热/热重、X射线衍射、透射电镜研究了前驱体的组成、前驱体在不同的煅烧温度下的物相变化以及煅烧粉体的分散性.结果表明,前驱体的组成为Y2(OH)5.14(NO3)0.86H2O,在500℃保温2 h可直接生成立方相的Y2O3,煅烧至1000℃保温2 h得到了结晶度高、分散性好、平均粒径为50 nm、近球形的Y2O3纳米粉体;三乙醇胺的加入有利于提高Y2O3粉体的分散性.
Abstract
In order to improve the dispersion of Y2O3 powders, nano-sized Y2O3 powders were prepared through the sol-gel reaction method using triethanolamine and ammonia water as gel. The composition of Y2O3 precursor, the phase formation process of Y2O3 and the properties of the calcined powders were investigated by DTA/TG, XRD and TEM. The result shows of the precursor is Y2(OH)5.14(NO3)0.86H2O. Cubic crystalline Y2O3 powders were prepared at 500℃ for 2 h directly. Highly crystalline, well dispersed and nearly spherical nano-sized Y2O3 powders were prepared at 1000℃ for 2 h. The average particle size of the powder is about 50 nm, and triethanolamine is beneficial for the dispersion of the calcined product.
关键词
氧化钇/纳米粉/溶胶-凝胶法/表面活性剂/分散Key words
yttria/nano-powders/sol-gel reaction method/surfactant/dispersion引用本文复制引用
出版年
2008
NETL
NSTL
维普
万方数据