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Synthesis and Thermoelectric Properties of Y Doped SrTiO3 by Modified Pechini's Method

Published online by Cambridge University Press:  01 February 2011

Hirofumi Takenouchi ,
Tomohiro Imai ,
Hideo Mae ,
Masakatsu Fujimoto ,
Tohru Kineri ,
Tsutomu Iida ,
Noriaki Hamada ,
Tsuneo Watanabe  and
Keishi Nishio
Hirofumi Takenouchi
Affiliation:
[email protected], Tokyo University of Science, Department of Materials Science and Technology, 2641 Yamazaki, Noda-shi, 278-8510, Japan
Tomohiro Imai
Affiliation:
[email protected], Tokyo University of Science, Department of Physics, 2641 Yamazaki, Noda-shi, 278-8510, Japan
Hideo Mae
Affiliation:
[email protected], Yamaguchi Prefectural Industrial Technology Institute, 4-1-1 Asutopia, Ube-shi, 755-0195, Japan
Masakatsu Fujimoto
Affiliation:
[email protected], Yamaguchi Prefectural Industrial Technology Institute, 4-1-1 Asutopia, Ube-shi, 755-0195, Japan
Tohru Kineri
Affiliation:
[email protected], Tokyo University of Science, Yamaguchi, Department of Materials Science and Environmental Engineering, 1-1-1 Daigaku-Dori, Sanyoonoda-shi, 756-0884, Japan
Tsutomu Iida
Affiliation:
[email protected], Tokyo University of Science, Department of Materials Science and Technology, 2641 Yamazaki, Noda-shi, 278-8510, Japan
Noriaki Hamada
Affiliation:
[email protected], Tokyo University of Science, Department of Physics, 2641 Yamazaki, Noda-shi, 278-8510, Japan
Tsuneo Watanabe
Affiliation:
[email protected], Tokyo University of Science, Department of Applied Electronics, 2641 Yamazaki, Noda-shi, 278-8510, Japan
Keishi Nishio
Affiliation:
[email protected], Tokyo University of Science, Department of Materials Science and Technology, 2641 Yamazaki, Noda-shi, 278-8510, Japan
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Abstract

Thermoelectric properties of Sr1-xYxTiO3 (x = 0-0.08) were calculated using a virtual crystal method. Using a Pechini's method, Sr1-xYxTiO3 (x = 0-0.06) precursor powder was prepared. Using this method, we prepared pure SrTiO3 at a lower temperature than would be using the conventional solid-state reaction method. The precursor solution was heated at 823 K for 5 h after drying at 353 K for 8 h to produce the precursor powder. The powder was sintered using a hot pressing technique. The relative densities of ceramics were more than 98%. The Seebeck coefficient and electrical conductivity of the samples were measured using the standard four-probe method in a flowing He gas atmosphere in a temperature range of 323 to 923 K. The conductivities of SrTiO3, Sr0.97Y0.03TiO3, and Sr0.94Y0.06TiO3 at room temperature were 6.61 × 102, 5.61 × 103, and 1.58 × 104 S/m, respectively. The Seebeck coefficients of SrTiO3, Sr0.97Y0.03TiO3, and Sr0.94Y0.06TiO3 at room temperature were -548, -264, and -196 μV/K, respectively.

Keywords

thermoelectricitythermal conductivityelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U06-11
Copyright
Copyright © Materials Research Society 2008

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