期刊
SOLID-STATE ELECTRONICS
卷 49, 期 6, 页码 1029-1033出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sse.2005.03.022
关键词
NiFe2O4; chemical co-precipitation; calcining temperature; gas-sensing properties; toluene
The gas-sensing materials, NiFe2O4, were prepared by inverse titrating chemical co-precipitation. After calcinations at 350-700 degrees C for 1 h, respectively, p-type semiconductor gas-sensing materials with inverse spinel structure were obtained. Effects of the calcining temperature on the phase constituents and microstructure were studied and characterized by simultaneous differential scanning calorimetry and thermogravimetry analysis (DSC-TGA), X-ray diffraction (XRD) and transmission electron microscopy (TEM). NiFe2O4 used as sensitive materials of indirect heating structure sensors were fabricated on an alumna tube with Au electrodes and platinum wires. The gas-sensing properties were determined for using reducing gases. The results demonstrated that the sensors based on NiFe2O4 had good sensitivity and good selectivity to toluene. The difference in response for various tested gases might be attributed to absorption of reducing gases and reaction between these gases and the absorbed oxygen. (c) 2005 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据