Preparation and characterization of nanocrystalline alpha-Fe2O3 by a sol-gel process

被引：160

作者：

Liu, XQ

Tao, SW

Shen, YS

机构：

[1] Dept. of Mat. Sci. and Engineering, Univ. of Sci. and Technol. of China, Hefei

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1997年 / 40卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

nanocrystalline materials; sol-gel process; gas-sensing properties; alpha Fe2O3;

D O I：

10.1016/S0925-4005(97)80256-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

alpha-Fe2O3 ultra-fine powder with an average particle size of 6-26nm has been prepared by a sol-gel process. Thermal analysis, X-ray diffraction and transmission electron microscope were used to study its formation process and micro-structure. The temperature dependence of the electric conductance of the elements made of nanocrystalline alpha-Fe2O3 shows that the gas-sensing properties are strongly related to its surface. The elements exhibited good sensitivity and selectivity to ethyl alcohol, indicating it is a promising alcohol-sensing material. (C) 1997 Elsevier Science S.A.

引用

页码：161 / 165

页数：5

共 13 条

[1]

CANTALINI C, 1993, SENSOR ACTUAT B-CHEM, V15, P293

[2] H-2 SENSORS USING FE2O3-BASED THIN-FILM [J].