Microwave sintering of ZnO nanopowders and characterization for gas sensing

被引：7
|
作者：
Bai, Zikui [2 ]
Xie, Changsheng [1 ]
Zhang, Shunping [1 ]
Xu, Weilin [2 ]
Xu, Jie [2 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
[2] Wuhan Text Univ, Minist Educ, Key Lab Green Proc & Functionalizat New Text Mat, Wuhan 430073, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2011年 / 176卷 / 02期
关键词：
Microwave sintering; ZnO; Gas sensor; Impedance spectroscopy; THICK-FILM; CO; SENSOR; TEMPERATURE; SENSITIVITY; IMPROVEMENT; STABILITY; GROWTH;
D O I：
10.1016/j.mseb.2010.11.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thick film gas sensors based on ZnO nanopowders were fabricated by using microwave sintering. The surface and cross section morphologies were characterized by field-emission scanning electron microscopy (FE-SEM). The stability of the microstructure was studied by impedance spectroscopy. The results showed that the shape of the nanoparticles was not changed through microwave sintering, and the thick films had the more dense microstructures than that by muffle oven sintering. The resistance-temperature characteristic and the responses to toluene, methanol and formaldehyde revealed that the microwave sintering technique could effectively control the growth of ZnO nanoparticles, realize the uniform sintering of thick film, gain the stable microstructure and improve the response of sensor. In addition, the formative mechanism of the thick film microstructure was proposed according to microwave sintering mechanism. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：181 / 186
页数：6
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