Lattice thermal conductivity of self-assembled PbTe-Sb2Te 3 composites with nanometer lamellae

Teruyuki Ikeda*, Eric S. Toberer, Vilupanur A. Ravi, Sossina M. Haile, G. Jeffrey Snyder

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

In the system of PbTe and Sb2Te3, a metastable compound Pb2Sb6Te11 appears by solidification processing. It has been reported that heat treatments decomposes this compound into two immiscible thermoelectric materials forming nanosized lamellar structure. The fraction transformed and the interlamellar 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 deccreasing inter-lamellar spacing. This is considered to be due to the coarsening of the microstructure.

Original languageEnglish (US)
Title of host publicationProceedings ICT'07 - 26th International Conference on Thermoelectrics
Pages1-4
Number of pages4
DOIs
StatePublished - 2007
EventICT'07 - 26th International Conference on Thermoelectrics - Jeju, Korea, Republic of
Duration: Jun 3 2007Jun 7 2007

Publication series

NameInternational Conference on Thermoelectrics, ICT, Proceedings

Other

OtherICT'07 - 26th International Conference on Thermoelectrics
CountryKorea, Republic of
CityJeju
Period6/3/076/7/07

ASJC Scopus subject areas

  • Engineering(all)

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