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Lattice thermal conductivity of self-assembled PbTe-Sb2Te3 composites with nanometer lamellae

Ikeda, Teruyuki and Toberer, Eric S. and Ravi, Vilupanur and Haile, Sossina M. and Snyder, G. Jeffrey (2007) Lattice thermal conductivity of self-assembled PbTe-Sb2Te3 composites with nanometer lamellae. Proceedings of the International Conference on Thermoelectrics, 26 . pp. 1-4. ISSN 1094-2734. (In Press)

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In the system of PbTe and Sb2Te3, a metastable compound Pb2Sb6Te11 appears by solidification processing. It has been reported that this compound is decomposed into the two immiscible thermoelectric materials forming nanosized lamellar structure by heat treatments. The fraction transformed and the inter-lamellar spacing was systematically investigated. In this work, the thermal conductivities and the electrical resistivities have been measured as functions of annealing time through the transformation and the coarsening processes to clarify the effect of the fraction transformed and the inter-lamellar spacing. The thermal conductivity of Pb2Sb6Te11 is lower than that after the decomposition. The lattice part of the thermal conductivity of PbTe/Sb2Te3 lamellar samples decreases with decreasing inter-lamellar spacing. This is considered to be due to the coarsening of the microstructure.

Item Type:Article
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URLURL TypeDescription
Haile, Sossina M.0000-0002-5293-6252
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2008 IEEE. This work was supported by the Office of Naval Research and Jet Propulsion Laboratory.
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Office of Naval Research (ONR)UNSPECIFIED
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INSPEC Accession Number10089534
Record Number:CaltechAUTHORS:IKEict07
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Official Citation:T. Ikeda, E. S. Toberer, S. M. Haile, V. A Ravi and G. J. Snyder "Lattice thermal conductivity of self-assembled PbTe-Sb2Te3 composites with nanometer lamellae" 26th International Conference on Thermoelectrics. Proceedings, ICT'07 (IEEE, 2007)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10345
Deposited By: Jeff Snyder
Deposited On:01 May 2008
Last Modified:16 Sep 2015 01:25

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