Fabrication and Thermoelectric Properties of Al-Doped (ZnO)₅In₂O₃ by Microwave Heating

Abstract:

Various (ZnO)₅In₂O₃ ceramics were fabricated by microwave heating. Density, XRD pattern and microstructure were examined and those of Al-doped (ZnO)₅In₂O₃ were almost the same as Al-free one. Highly textured (ZnO)₅In₂O₃ ceramic was also fabricated by reactive templated grain growth (RTGG) method. The electrical conductivity was not improved by Al-doping; however it was improved slightly by microwave heating compared with conventional heating and especially improved by texturing using RTGG method. On the other hand, the absolute Seebeck coefficient in microwave heating was improved about 25% by Al-doped. Maximum electric power factor of textured specimen fabricated by RTGG method along ab-plane showed 5.76×10^-4 WK^-2m^-1 (at 873K), which was attributed to high electrical conductivity.

• Periodical: Materials Science Forum (Volume 761)
• Pages: 27-31
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.761.27
• Online since: July 2013
• Authors: Tomoyuki Endo, Yamato Hayashi, Jun Fukushima, Hirotsugu Takizawa
• Keywords: Indium Oxide, Layer-Structured Oxide Material, Microwave Heating, Textured Ceramics, Thermoelectric Material, Zinc Oxide (ZnO)

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