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Composites of Higher Manganese Silicides and Nanostructured Secondary Phases and Their Thermoelectric Properties

Zhou, A. J. and Zhao, X. B. and Zhu, T. J. and Cao, Y. Q. and Stiewe, C. and Haßdorf, R. and Müller, E. (2009) Composites of Higher Manganese Silicides and Nanostructured Secondary Phases and Their Thermoelectric Properties. Journal of Electronic Materials, 38 (7), pp. 1072-1077. DOI: 10.1007/s11664-009-0774-7. ISSN 1543-186X .

Full text not available from this repository.

Abstract

Composites of higher manganese silicides (HMS) and hydrothermally synthesized nanostructured Ag2Te or PbTe powders were fabricated by mechanical mixing and hot-pressing. A reduction of the thermal conductivity and an increase of the Seebeck coefficient were obtained for the Ag2Te/HMS composite, while the Seebeck coefficient of the PbTe/HMS composite was less influenced and its thermal conductivity decreased too. However, both composites showed a considerably reduced electrical conductivity, which degraded the figure of merit. The lattice contribution was found to be the main part of the thermal conductivity for all the samples. The present results indicate that introducing a secondary phase into a matrix material could be an effective way to reduce the thermal conductivity. On the other hand, a more detailed design of the microstructures and the distribution of the secondary phases is still needed with respect to the effect on the electrical properties.

Document Type:Article
Title:Composites of Higher Manganese Silicides and Nanostructured Secondary Phases and Their Thermoelectric Properties
Authors:
AuthorsInstitution or Email of Authors
Zhou, A. J.ajzhou.zju@gmail.com
Zhao, X. B.State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
Zhu, T. J.State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
Cao, Y. Q.State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
Stiewe, C.German Aerospace Center, Institute of Materials Research, Köln, Germany
Haßdorf, R.German Aerospace Center, Institute of Materials Research, Köln, Germany
Müller, E.German Aerospace Center, Institute of Materials Research, Köln, Germany
Date:21 April 2009
Journal or Publication Title:Journal of Electronic Materials
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:38
DOI:10.1007/s11664-009-0774-7
Page Range:pp. 1072-1077
ISSN:1543-186X
Status:Published
Keywords:Higher manganese silicides (HMS) - hot-pressing - thermoelectric properties - composites
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Fahrzeugenergiesysteme (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Dr. Knud Zabrocki
Deposited On:24 Nov 2009 16:43
Last Modified:07 Feb 2013 20:30

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