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Transport Behavior and Thermal Conductivity Reduction in the Composite System PbTe-Pb-Sb

Published online by Cambridge University Press:  01 February 2011

Joseph Sootsman
Affiliation:
[email protected], Northwestern University, Chemistry, 2145 Sheridan Rd., Evanston, IL, 60208, United States
Huijun Kong
Affiliation:
[email protected], University of Michigan, Department of Physics, Ann Arbor, MI, 48109, United States
Ctirad Uher
Affiliation:
[email protected], University of Michigan, Department of Physics, Ann Arbor, MI, 48109, United States
Adam Downey
Affiliation:
[email protected], Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Jonathan James D'Angelo
Affiliation:
[email protected], Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Chun-I Wu
Affiliation:
[email protected], Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Timothy Hogan
Affiliation:
[email protected], Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Thierry Caillat
Affiliation:
[email protected], California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA, 91109, United States
Mercouri Kanatzidis
Affiliation:
[email protected], Northwestern University, Department of Chemistry, 2145 Sheridan Rd., Evanston, IL, 60208, United States
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Abstract

We report the synthesis of nanostructured composite PbTe with excess Pb and Sb metal inclusions. Scanning and transmission electron microscopy reveal these inclusions in both the nano- and macroscales. The electrical conductivity and Seebeck coefficient dependence on temperature show unusual trends which depend on the inclusion Pb/Sb ratio. Several ratios showed marked enhancements in power factor at 700 K. The thermal conductivity of these composites is reported.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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