MICROSTRUCTURE AND HUMIDITY-SENSITIVE CHARACTERISTICS OF ALPHA-FE2O3 CERAMIC SENSOR

被引：92

作者：

CANTALINI, C

PELINO, M

机构：

[1] Dipartimento di Chimica, Ingegneria Chimica e Materiali, Università de L'Aquila, L'Aquila

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 03期

关键词：

D O I：

10.1111/j.1151-2916.1992.tb07840.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：

The microstructure and humidity-sensitive characteristics of alpha-Fe2O3 porous ceramic were investigated. Microporous alpha-Fe2O3 powders were obtained by controlling the topotactic decomposition reaction of alpha-FeOOH. Water vapor adsorption thermogravimetrical experiments were carried out in the relative humidity (rh) range 0% to 95% on the alpha-Fe2O3 powder and the 900-degrees-C sintered compact. The microstructure was investigated by SEM, TEM, Hg intrusion, and N2 adsorption porosimetry techniques. The humidity sensitivity was investigated by the impedance measurements technique in 0% to 95% rh on the compacts sintered at 50-degrees-C steps in the 850-degrees to 1100-degrees-C range. Humidity response was found to be affected by the microstructure, i.e., the characteristics of the precursor powders and sintering temperatures.

引用

页码：546 / 551

页数：6

共 27 条

[1] ELECTRICAL CONDUCTIVITY OF SILICA GEL IN PRESENCE OF ADSORBED WATER [J].