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High-temperature Thermoelectric Properties of the Ca1-xBixMnO3 System

Published online by Cambridge University Press:  31 January 2011

Gaojie Xu ,
Ryoji Funahashi ,
Ichiro Matsubara ,
Masahiro Shikano  and
Yuqin Zhou
Gaojie Xu
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–8-31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
Ryoji Funahashi*
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–8-31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
Ichiro Matsubara
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–8-31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
Masahiro Shikano
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–8-31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
Yuqin Zhou
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–8-31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
*
a)Address all correspondence to this author. e-mail: funahashi-r@aist.go.jp
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Extract

Polycrystalline samples of Ca1-xBixMnO3 (0.02 ≤ x ≤ 0.20) were studied by means of x-ray diffraction, electrical resistivity (ρ), thermoelectric power (S), and thermal conductivity (κ) at high temperature. Bi doping leads to the lattice parameters a, b, and c increasing. And the ρ and the absolute value of S decrease rapidly with Bi doping. The largest power factor, S2/ρ, is obtained in the x = 0.04 sample, which is 3.6×10−4 Wm−1 K−2 at 400 K. The figures of merit (Z = S2/ρκ) for this sample and 1.0×10−4 and 0.86 × 10−4 K−1 at 600 and 1000 K, respectively.

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Articles
Information
Journal of Materials Research , Volume 17 , Issue 5 , May 2002 , pp. 1092 - 1095
Copyright
Copyright © Materials Research Society 2002

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