Sol-gel synthesis of Na+ beta-Al2O3 powders

被引：26

作者：

Sartori, S ^{[1
]}

Martucci, A ^{[1
]}

Muffato, A ^{[1
]}

Guglielmi, M ^{[1
]}

机构：

[1] Univ Padua, Dipartimento Ingn Meccan S Mat, I-35131 Padua, Italy

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2004年 / 24卷 / 06期

关键词：

Na+ beta-Al2O3; ionic conductivity; sintering; sol-gel process; x-ray methods;

D O I：

10.1016/S0955-2219(03)00513-2

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：

Powders of general formula Na1+xAl11O17+x/2 with x 0, 0.2 and 0.57 have been obtained by hydrolysis and condensation of metal alkoxides. X-ray diffraction investigations showed the crystallization of beta-alumina peaks at 1100 degreesC, confirmed by DTA/TG measurements. The same phase was revealed for pellets sintered in air at 1400 degreesC. Densities up to 97% of the theoretical value were reached. Electrical performances of pellets of x=0.2 and 0.57 compositions were investigated by Dielectric Analyzer (DEA) at various frequencies. The measured values confirmed the good conductivity and activation energy performances of the material. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：911 / 914

页数：4

共 16 条

[1] TEMPERATURE-DEPENDENCE OF THE AC CONDUCTIVITY OF NA BETA-ALUMINA [J].