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 .
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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.
|Title:||Composites of Higher Manganese Silicides and Nanostructured Secondary Phases and Their Thermoelectric Properties|
|Date:||21 April 2009|
|Journal or Publication Title:||Journal of Electronic Materials|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1072-1077|
|Keywords:||Higher manganese silicides (HMS) - hot-pressing - thermoelectric properties - composites|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Transport|
|HGF - Program Themes:||V BF - Bodengebundene Fahrzeuge|
|DLR - Research area:||Transport|
|DLR - Program:||V BF - Bodengebundene Fahrzeuge|
|DLR - Research theme (Project):||V - Fahrzeugenergiesysteme (old)|
|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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