文献类型：期刊文献

中文题名：喷雾热解制备稀土超细粉末(Ⅰ)——氧化钇粒子形态与形成机理

英文题名：Synthesis of Rare Earth Ultrafine Powders by Spray Pyrolysis (Ⅰ) Particle Morphology and Formation Mechanism of Y 2O 3 Powder

作者：赵新宇[1];张煜[1];古宏晨[1];高玮[1]

机构：[1]华东理工大学技术化学物理研究所

年份：1998

卷号：19

期号：4

起止页码：507

中文期刊名：高等学校化学学报

外文期刊名：Chemical Journal of Chinese Universities

收录：CSTPCD;;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金

语种：中文

中文关键词：喷雾热解;超细粉末;稀土;氧化钇粒子;制备

外文关键词：Spray pyrolysis, Y 2O 3, Ultrafine powders, Rare earth

摘要：对Ｙ（ＮＯ３）３·６Ｈ２Ｏ的差热和热重分析表明，Ｙ（ＮＯ３）３·６Ｈ２Ｏ经脱水和热分解在５８０℃以上完全分解为Ｙ２Ｏ３．在此基础上，以Ｙ（ＮＯ３）３·６Ｈ２Ｏ为前驱体，采用喷雾热解过程制备出粒度为０．５０～１．５０μｍ的立方相球形Ｙ２Ｏ３粉末．通过对产物粒子粒度的理论计算与实验结果的比较，推测Ｙ２Ｏ３粒子形成机理符合液滴－粒子转变机理（Ｏｎｅ－Ｄｒｏｐｌｅｔ－Ｏｎｅ－Ｐａｒｔｉｃｌｅｍｅｃｈａｎｉｓｍ）．本喷雾热解过程同样适用于其它稀土超细粉末的制备，粒子粒度可以通过调节液滴尺寸和溶液浓度等操作条件进行控制．
Spray pyrolysis is a promising process for mass production of high quality ultrafine powder. However, studies for preparation of rare earth powder by spray pyrolysis are relatively few until now. In this study the spray pyrolysis process was used to prepare Y 2O 3 ultrafine powder. First, the thermal properties of precursor Y(NO 3) 3·6H 2O were determined by DTA and TG. It was indicated that Y(NO 3) 3·6H 2O was fully decomposed into Y 2O 3 above 580 ℃ at a heating rate 20 ℃/min. Based on the thermal analysis results, pure cubic phase Y 2O 3 powders with uniform size of 0.50～1.50 μm were prepared by spray pyrolysis from aqueous solution of Y(NO 3) 3·6H 2O. The particle size can be adjusted by controlling the operation parameters such as droplet size and concentration of precursor solution. It was proposed that the formation mechanism of Y 2O 3 powders conforms with One Droplet One Particle mechanism(ODOP). This spray pyrolysis process can also be adapted to prepare other kinds of rare earth powders.