Improvement of thermoelectric properties of WO3 ceramics by NiO addition

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• 作者：Xiang Dong ; Yingjie Gan ; Liang Dong…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2013
• 出版时间：November 2013
• 年：2013
• 卷：24
• 期：11
• 页码：4316-4320
• 全文大小：569KB
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• 作者单位：Xiang Dong (1)
  Yingjie Gan (2)
  Liang Dong (1)
  Shujie Peng (2)
  Yu Wang (1)
  
  1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China
  2. School of Material Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China
  
• ISSN：1573-482X

文摘

The thermoelectric properties of tungsten trioxide (WO3) ceramics doped with nickel oxide (NiO) were investigated from 323 up to 1,023?K. The results revealed that doping WO3 with NiO could promote the grain growth and the density. There was a second phase (NiWO4) segregation at the grain boundaries in the samples containing more than 1.0?mol% NiO, which inhibited the further grain growth. The magnitude of the electrical conductivity (σ) and the absolute value of the Seebeck coefficient (|S|) depended strongly on the NiO content. As for the power factor (σS 2 ), the 1.0?mol% sample has the maximum value of the power factor which is 0.55?μW?m??K? at 1,023?K.