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Thermoelectric Properties of La-doped BaSi2 and (Ba,Sr)Si2 Solid Solutions

Published online by Cambridge University Press:  01 February 2011

Kohsuke Hashimoto ,
Ken Kurosaki ,
Hiroaki Muta  and
Shinsuke Yamanaka
Kohsuke Hashimoto
Affiliation:
hashimoto@ms.see.eng.osaka-u.ac.jp, Osaka University, Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Yamadaoka 2-1, Suita, 565-0871, Japan, +81-6-6879-7905, +81-6-6879-7889
Ken Kurosaki
Affiliation:
kurosaki@see.eng.osaka-u.ac.jp, Osaka University, Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Yamadaoka 2-1, Suita, 565-0871, Japan
Hiroaki Muta
Affiliation:
muta@see.eng.osaka-u.ac.jp, Osaka University, Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Yamadaoka 2-1, Suita, 565-0871, Japan
Shinsuke Yamanaka
Affiliation:
yamanaka@see.eng.osaka-u.ac.jp, Osaka University, Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Yamadaoka 2-1, Suita, 565-0871, Japan
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Abstract

We studied the thermoelectric properties of BaSi2 and SrSi2. The polycrystalline samples were prepared by spark plasma sintering (SPS). The electrical resistivity (ρ), Seebeck coefficient (S), and thermal conductivity (κ) were measured above room temperature. The maximum values of the dimensionless figure of merit (ZT) were 0.01 at 954 K for BaSi2 and 0.09 at 417 K for SrSi2. We tried to enhance the ZT values of BaSi2 and SrSi2 by prepareing and characterizing La-doped BaSi2 and (Ba,Sr)Si2 solid solution.

Keywords

thermoelectricityelectrical propertiesthermal conductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U06-12
Copyright
Copyright © Materials Research Society 2008

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