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Thermal conductivity control of ZnO thermoelectric ceramics using hot-pressing method

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4 Author(s)
Fujishiro, Y. ; Synergy Mater. Res. Center, Nat. Inst. of Adv. Ind. Sci. & Technol. (AIST), Nagoya, Japan ; Awano, M. ; Moon, J. ; Maeda, K.

Nanostructural ZnO ceramics was prepared using Al doped ZnO nano-powders by low-temperature HPing at 950°C for 3h. Al-doped ZnO nano-powders was obtained by chemical processing of both co-precipitation and spray drying at 120°C. Power factor of the prepared ZnO ceramics is 5.0×10-4 Wm-1K-2, which increased ca. 20% by HP sintering at 950°C. The prepared nanostructural ZnO ceramics showed lower thermal conductivity than that of normal sintered ceramics at the lower temperature range.

Published in:

Thermoelectrics, 2002. Proceedings ICT '02. Twenty-First International Conference on

Date of Conference:

25-29 Aug. 2002