Falkenbach, Oliver und Loeh, Marc O. und Wiegand, Christoph W. und Schmitz, Andreas und Hartung, David und Koch, Guenter und Klar, Peter J. und Müller, Eckhard und Schlecht, Sabine (2017) Structural and Thermoelectric Properties of Nanostructured Nominally Stoichiometric Pb1−xBixTe Prepared by Mechanical Alloying. Journal of Electronic Materials. Springer. doi: 10.1007/s11664-017-5607-5. ISSN 0361-5235.
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Kurzfassung
We have investigated the influence of substituting bismuth for lead in lead telluride. The material was nanostructured by mechanical alloying and compacted via short-term sintering or hot pressing. Synthesis of samples with substitution up to 6 at.% bismuth was carried out twice to ensure reproducibility. All relevant thermoelectric transport parameters were measured in a wide temperature range from 123 K or 173 K to 773 K. Two different techniques for measuring the electrical conductivity and Seebeck coefficient were used, one at low and the other at high temperature. Higher bismuth content of 4 at.% to 6 at.% was found to result in the best thermoelectric properties, with maximum ZT value of about 0.7 at 723 K for 4.0 at.% bismuth. The structure was examined in detail via x-ray diffraction analysis, Raman spectroscopy, and transmission electron microscopy. A key feature of the microstructure was the inhomogeneous distribution of bismuth in the lead telluride matrix and the occurrence of bismuth-rich regions on the nanoscale, related to remarkably increased carrier concentration and mobility.
elib-URL des Eintrags: | https://elib.dlr.de/115154/ | ||||||||||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||||||||||
Titel: | Structural and Thermoelectric Properties of Nanostructured Nominally Stoichiometric Pb1−xBixTe Prepared by Mechanical Alloying | ||||||||||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 31 Mai 2017 | ||||||||||||||||||||||||||||||||||||||||
Erschienen in: | Journal of Electronic Materials | ||||||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1007/s11664-017-5607-5 | ||||||||||||||||||||||||||||||||||||||||
Verlag: | Springer | ||||||||||||||||||||||||||||||||||||||||
ISSN: | 0361-5235 | ||||||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||||||
Stichwörter: | Thermoelectric materials, Compacting methods, Temperature Treatment, Raman spectroscopy | ||||||||||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||||||||||||||||||
HGF - Programm: | Speicher und vernetzte Infrastrukturen | ||||||||||||||||||||||||||||||||||||||||
HGF - Programmthema: | Thermische Energiespeicher | ||||||||||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SP - Energiespeicher | ||||||||||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Thermochemische Prozesse (Speicher) (alt) | ||||||||||||||||||||||||||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Thermoelektrische Materialien und Systeme | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt von: | Yasseri, Mohammad | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt am: | 22 Nov 2017 10:22 | ||||||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 02 Nov 2023 14:38 |
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