PREPARATION OF NANOMETER ZrO2-8%Y2O3 POWDERS BY AZEOTROPIC DISTILLATION PROCESSING
来源期刊：中国有色金属学报(英文版)1999年第1期
论文作者：Yin Bangyao Wang Lingsen Zhang Jinshen Huan Yi Yang Yong Ling Jianliang
文章页码：44 - 47
Key words：ZrO2-8%Y2O3; nanometer powder; chemical coprecipitation method; azeotropic distillation hard agglomerate
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.
