NiO Sensing Electrode for NO sub(x) Detection at High Temperature

Mixed-potential-type N02 sensor based on yttria-stabilized zirconia(YSZ) with NiO sensing electrode was prepared by the screen-printing technique and its physical characteristics were studied by the X-ray diffraction and scanning electron microscope. The response of electromotive force (EMF) and com...

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Bibliographic Details
Published in:Key engineering materials 2013-03, Vol.544, p.76-80
Main Authors: Feng, Tao, Xia, Jin Feng, Nian, Mono Qiang, Huang, De Xin, Xu, Hai Fang, Li, Yu Lin, Xu, Bing, Jiang, Dang Yu
Format: Article
Language:English
Subjects:
Detection
Electrodes
EMF
Impedance
Nitrogen dioxide
Scanning electron microscopy
Sensors
Yttria stabilized zirconia
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Summary:Mixed-potential-type N02 sensor based on yttria-stabilized zirconia(YSZ) with NiO sensing electrode was prepared by the screen-printing technique and its physical characteristics were studied by the X-ray diffraction and scanning electron microscope. The response of electromotive force (EMF) and complex impedance of the sensor were tested under different NO2 concentrations and temperatures. The results show that, at the range of 550-750 [degrees]C, the EMF values are negative and almost linear to the logarithm of NO2 concentration. But the sensitivity of the sensor and the amplitude of the EMF response to NO2 concentration both obviously decrease with the increase of the work temperature. In addition, the semicircular arcs of the complex impedance spectra shrink regularly with a raise of NO2 concentration at 600 [degrees]C.
ISSN:1013-9826
DOI:10.4028/www.scientific.net/KEM.544.76