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Thermoelectric Properties of Ag-Tl-Te Ternary System

Published online by Cambridge University Press:  01 February 2011

Ken Kurosaki ,
Atsuko Kosuga ,
Keita Goto ,
Hiroaki Muta  and
Shinsuke Yamanaka
Ken Kurosaki
Affiliation:
kurosaki@nucl.eng.osaka-u.ac.jp, Osaka University, Division of Sustainable Energy and Environmental Engineering, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
Atsuko Kosuga
Affiliation:
kosuga@nucl.eng.osaka-u.ac.jp
Keita Goto
Affiliation:
k-goto@nucl.eng.osaka-u.ac.jp
Hiroaki Muta
Affiliation:
muta@nucl.eng.osaka-u.ac.jp
Shinsuke Yamanaka
Affiliation:
yamanaka@nucl.eng.osaka-u.ac.jp
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Abstract

We have studied the thermoelectric properties of thallium compounds as novel thermoelectric materials. Especially, we focus on the Ag-Tl-Te ternary system, in which we found that Ag9TlTe5 exhibits an excellent thermoelectric figure of merit (ZT= 1.23) because of its extremely low thermal conductivity (around 0.22 Wm−1K−1). In this paper, we studied the thermal conductivity of four kinds of ternary silver thallium tellurides: AgTl3Te2, AgTlTe, Ag8Tl2Te5 and Ag9TlTe5, for which we found room temperature values of 0.39, 0.26, 0.14 and 0.21 Wm−1K−1, respectively. In order to understand the extremely low thermal conductivity, we performed an ultrasonic pulse echo measurement and evaluated some thermophysical properties.

Keywords

thermal conductivitythermoelectricityTl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 886: Symposium F – Materials and Technologies fore Direct Thermal-to-Electric Energy Conversion , 2005 , 0886-F09-07
Copyright
Copyright © Materials Research Society 2006

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References

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