Dispersion of nano-sized 7-alumnina powder in non-polar solvents

被引：74

作者：

Liu, JC

Jean, JH ^{[1
]}

Li, CC

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

[2] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei, Taiwan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2006年 / 89卷 / 03期

关键词：

D O I：

10.1111/j.1551-2916.2005.00858.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：

To disperse nano-sized gamma-alumina powders in non-polar solvents, the surface of gamma-alumina has to be modified with unsaturated oleic acid, which forms aluminum-oleate on the surface. This changes the surface characteristics of gamma-alumina powders from hydrophilic to hydrophobic in nature. A colloidally stable gamma-alumina non-polar suspension is obtained when a critical amount of aluminum-oleate compound is formed on the surface. This is also evidenced by the results of adsorption and theoretical calculation of potential energies, which confirm the colloidal stability of organic gamma-alumina suspension caused by the steric repulsion mechanism.

引用

页码：882 / 887

页数：6

共 28 条

[1] Interaction of carboxylic acids with the oxyhydroxide surface of aluminium: poly(acrylic acid), acetic acid and propionic acid on pseudoboehmite [J].