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Extremely Low Thermal Conductivity Substances as Novel Thermoelectric Materials

Published online by Cambridge University Press:  01 February 2011

Shinsuke Yamanaka ,
Ken Kurosaki ,
Atsuko Kosuga ,
Keita Goto  and
Hiroaki Muta
Shinsuke Yamanaka
Affiliation:
[email protected], Japan
Ken Kurosaki
Affiliation:
[email protected], Japan
Atsuko Kosuga
Affiliation:
[email protected], Japan
Keita Goto
Affiliation:
[email protected], Japan
Hiroaki Muta
Affiliation:
[email protected], Japan
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Abstract

We have prepared polycrystalline bulk samples of various thallium compounds and measured their thermoelectric properties. The most remarkable point of the thermoelectric properties of the thallium compounds is the extremely low thermal conductivity. The state-of-the-art thermoelectric materials such as Bi2Te3 and TAGS materials indicate relatively low the thermal conductivity, around 1.5 W/m/K. However, the thermal conductivity of the thallium compounds is below 0.5 W/m/K; especially that of silver thallium tellurides is around 0.25 W/m/K at room temperature. This extremely low thermal conductivity leads a great advantage for an enhancement of the thermoelectric performance. In this paper, we report on the properties of some thallium compounds selected for study as novel thermoelectric materials. One of these compounds seems to have a thermoelectric figure of merit comparable to those of state-of-the-art materials.

Keywords

Tlthermoelectricitythermal conductivity
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-F09-05
Copyright
Copyright © Materials Research Society 2006

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References

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