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

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

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Kurzfassung

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.

Dokumentart:Zeitschriftenbeitrag
Titel:Composites of Higher Manganese Silicides and Nanostructured Secondary Phases and Their Thermoelectric Properties
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
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
Datum:21 April 2009
Erschienen in:Journal of Electronic Materials
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:38
DOI :10.1007/s11664-009-0774-7
Seitenbereich:Seiten 1072-1077
ISSN:1543-186X
Status:veröffentlicht
Stichwörter:Higher manganese silicides (HMS) - hot-pressing - thermoelectric properties - composites
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - Fahrzeugenergiesysteme (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Thermoelektrische Materialien und Systeme
Hinterlegt von: Dr. Knud Zabrocki
Hinterlegt am:24 Nov 2009 16:43
Letzte Änderung:07 Feb 2013 20:30

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