摘要
Yb(NO3)3·6H2O的差热和热重分析表明,Yb(NO3)3·6H2O经脱水和热分解在460℃以上完全分解为Yb2O3。在此基础上,以Yb(NO3)3·6H2O为前驱体采用喷雾热分解法制备出粒度为050～150μm的单相立方晶系球形Yb2O3粉末。本喷雾热分解法同样适用于其他稀土超细粉末的制备,粒子粒径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.This study used spray pyrolysis process to prepare Yb 2O 3 ultrafine powders.First,the thermal properties of precursor Yb(NO 3) 3·6H 2O were determined by DTA and TG.It was indicated that Yb(NO 3) 3·6H 2O was fully decomposed into Yb 2O 3 above 460℃ at a heating rate 20℃/min.Based on the thermal analysis results,pure cubic phase Yb 2O 3 powders with uniform size of 0.50～1.50μm were prepared by spray pyrolysis from aqueous solution of Yb(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.This spray pyrolysis process can also be adapted to prepare other kinds of rare earth powders.
出处
《稀土》
EI
CAS
CSCD
北大核心
2000年第1期8-10,共3页
Chinese Rare Earths
基金
国家自然科学基金!资助课题 ( 2 96 76 0 0 9
2 96 3 6 0 10 )
