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Supervisor：Jiangxi University Of Science And Technology
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Jiangxi Nonferrous Metals Society
ISSN：1674-9669
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CODEN YJKYA9
Volume 7 Issue 2
Apr.  2016
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LI Haozhe, GONG Shuchu, YANG Bao, ZHANG Jia, ZHANG Hong. Electrical conductivity and temperature sensitivity of W/F-modified CuO-based ceramics[J]. Nonferrous Metals Science and Engineering, 2016, 7(2): 54-59. DOI: 10.13264/j.cnki.ysjskx.2016.02.010
Citation: LI Haozhe, GONG Shuchu, YANG Bao, ZHANG Jia, ZHANG Hong. Electrical conductivity and temperature sensitivity of W/F-modified CuO-based ceramics[J]. Nonferrous Metals Science and Engineering, 2016, 7(2): 54-59. DOI: 10.13264/j.cnki.ysjskx.2016.02.010
shu

Electrical conductivity and temperature sensitivity of W/F-modified CuO-based ceramics

  • 1.

    Zhounan High School, Changsha 410005, China

  • 2.

    School of Materials Science and Engineering, Central South University, Changsha 410083, China

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  • Received Date: February 08, 2016
  • Published Date: April 29, 2016
    Graphical Abstract
    • Abstract
  • >In order to develop new system of thermal sensitive ceramics with negative temperature coefficient (NTC) of resistivity, W/F modified CuO-based ceramics (Cu1-yWyO:Fx, xranges 0.01~0.07 and yranges 0~0.006)were prepared by using a wet-chemical synthesis method. The phase component, microstructure, electrical conductivity and resistivity-temperature characteristics of the ceramics were analyzed by using X-Ray diffraction, scanning electron microscope, resistance-temperature measurement and electrochemical impedance spectrum, respectively. The results show that the room temperature resistivities of the CuO ceramics can be adjusted obviously by doping with F ions, and the W/F-doped CuO ceramics have excellent NTC feature with the highest materials constant of 5084 K. The electrical conductivity and NTC characteristics of the W/F modified CuO ceramics are co-resulted from the grain effect (bulk effect) and grain-boundary effect. Both the band conduction and electron-hopping models are proposed for the conduction mechanisms in the W/F modified CuO ceramics.
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    • References (23)
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