PREPARATION OF NANOMETER ZrO2-8%Y2O3POWDERS BY AZEOTROPIC DISTILLATION PROCESSING①|Yin Bangyao, Wang Lingsen, Zhang Jinshen, Huan Yi, Yang Yong and Ling JianliangState Key Laboratoryfor Powder Metallurgy,-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 9 No. 1 March 1999

PREPARATION OF NANOMETER ZrO₂-8%Y₂O3POWDERS BY AZEOTROPIC DISTILLATION PROCESSING①

Yin Bangyao, Wang Lingsen, Zhang Jinshen, Huan Yi, Yang Yong and Ling Jianliang
State Key Laboratoryfor Powder Metallurgy,

（Central South University of Technology, Changsha 410083, P. R. China）

Abstract:Gels of Zr(OH)₄and 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, %)Y₂O₃powders prepared by this processing, with the average particle size of 16 nm, can be sintered to 98.5% TD at 1 450℃for 2 h with an average grain size of ceramic of 0.3μm.

Key words: ZrO₂-8%Y₂O₃　nanometer powder　chemical coprecipitation method　azeotropic distillation hard agglomerate

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW