NONCONVENTIONAL SYNTHESES OF BETA-ALUMINA POWDERS

被引：15

作者：

COLUCCI, G

NEGRO, A

VISCONTE, E

PIJOLAT, C

LALAUZE, R

机构：

[1] Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, 1029 Torino

[2] Departement de Chimie-Physique des Processus Industriels, Ecole Nationale Supérieure des Mines de Saint-Etienne, 42023 Saint-Etienne Cédex 02, 158, Cours Fauriel

来源：

CERAMICS INTERNATIONAL | 1990年 / 16卷 / 04期

关键词：

D O I：

10.1016/0272-8842(90)90070-V

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：

Because of its high ionic conductivity β-alumina is currently used as a solid electrolyte for gas sensors. In order to control the morphological properties and sodium contents of powder used in such applications, it has been produced by two types of synthesis: by thermal denitrification and by the use of a gel. The various β-alumina crystallization mechanisms have been characterized. They illustrate the role played by certain precursors which, when present, are capable of affecting the ratio of β and β″ phases. Electrical conductivity measurements by AC technique at 300-500°C were carried out. Ageing tests confirmed the much higher stability of the gel-prepared products. © 1990.

引用

页码：225 / 229

页数：5