溶胶-凝胶法制备纳米Y_2O_3粉体  

Preparation of nano-sized Y_2O_3 powders by sol-gel method

作　　者：徐国纲[1] 张旭东[1] 何文[1] 李红[1] 孟霞[1] 

机构地区：[1]山东轻工业学院材料科学与工程系,济南250100

出　　处：《材料科学与工艺》2008年第2期247-249,共3页Materials Science and Technology

基　　金：山东省自然科学基金资助项目(Y2003F02)

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2h可直接生成立方相的Y2O3,煅烧至1000℃保温2h得到了结晶度高、分散性好、平均粒径为50nm、近球形的YO纳米粉体;三乙醇胺的加入有利于提高YO粉体的分散性.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 2h 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 

分 类 号：TQ174[化学工程—陶瓷工业]