PREPARATION OF MONODISPERSE, SPHERICAL ALUMINA POWDERS FROM ALKOXIDES

被引：81

作者：

OGIHARA, T ^{[1
]}

NAKAJIMA, H ^{[1
]}

YANAGAWA, T ^{[1
]}

OGATA, N ^{[1
]}

YOSHIDA, K ^{[1
]}

MATSUSHITA, N ^{[1
]}

机构：

[1] TAKEFU FINE CHEM CO LTD,TAKEFU,FUKUI 915,JAPAN

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 09期

关键词：

D O I：

10.1111/j.1151-2916.1991.tb08294.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Monodisperse, spherical alumina powders were prepared by the controlled hydrolysis of aluminum alkoxide in a dilute solution consisting of octanol and acetonitrile. The reagent concentration influenced the particle size distribution, morphology, and state of agglomeration. The addition of acetonitrile and octanol affected both particle shape and the state of agglomeration and prevented gelation during hydrolysis. Sub-micrometer-sized alumina particles grew to 10-mu-m with increased concentration of hydroxypropylcellulose dispersant. As-prepared amorphous powders crystallized to gamma-alumina at 1000-degrees-C and converted to alpha-alumina at 1150-degrees-C without intermediate phases. The particle morphology was retained after crystallization to gamma-alumina.

引用

页码：2263 / 2269

页数：7

共 30 条

[11] PREPARATION OF UNIFORM COLLOIDAL DISPERSIONS BY CHEMICAL-REACTIONS IN AEROSOLS .2. SPHERICAL-PARTICLES OF ALUMINUM HYDROUS OXIDE [J].