Preparation of nanometer ZrO2-8% Y2O3 powders by azeotropic distillation processing

被引：0
|
作者：
Yin, BY [1 ]
Wang, LS [1 ]
Zhang, JS [1 ]
Huan, Y [1 ]
Yang, Y [1 ]
Ling, JL [1 ]
机构：
[1] Cent S Univ Technol, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 1999年 / 9卷 / 01期
关键词：
ZrO2-8% Y2O3; nanometer powder; chemical coprecipitation; method azeotropic distillation; hard agglomerate;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Gels of Zr(OH)(4) and Y(OH)(3), prepared by the chemical coprecipitation method, were effectively dehydrated by the azeotropic distillation processing. Because of the removal of interparticle free water, replacement of surface hydroxyl groups with butoxy groups and steric effects of n-butanol, colse approach of gel particles and Zr-O-Zr chemical bond formation between them were prevented. Nanometer ZrO2-8 % (mole fraction, %)Y2O3 powders prepared by this processing, with the average particle size of 16 nm, can be sintered to 98.5 % TD at 1450 degrees C for 2 h with an average grain size of ceramic of 0.3 mu m.
引用
收藏
页码：44 / 47
页数：4
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