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Dasgupta, Titas und Stiewe, Christian und de Boor, Johannes und Müller, Eckhard (2014) Influence of power factor enhancement on the thermoelectric figure of merit in Mg2Si0.4Sn0.6 based materials. Physica Status Solidi (A) - Applications and Materials Science, 211 (6), Seiten 1250-1254. Wiley. doi: 10.1002/pssa.201300196. ISSN 1862-6300.
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Kurzfassung
The influence of power factor enhancement on the superior thermoelectric (TE) performance of Mg2(Si,Sn) is studied based on a comparison with Mg2Si. Doped compounds with compositions of Mg2(Si0.4Sn0.6) are synthesized and the TE properties measured between room temperature and 773 K. Carrier concentration and hall mobilities at room temperature are measured on selected samples. Enhancement of the density-of-states effective mass and mobilities comparable to Mg2Si indicate band convergence in the solid solutions to be the cause of the power factor enhancement. Microstructural analysis shows the presence of secondary Si rich phases while the matrix corresponds to Mg2(Si0.3Sn0.7). A doped compound with this composition is synthesized and exhibits superior ZT values (compared to the Mg2(Si0.4Sn0.6) specimens) with a ZTmax ∼1.3 at 773 K.
| elib-URL des Eintrags: | https://elib.dlr.de/92542/ | ||||||||||||||||||||
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| Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
| Titel: | Influence of power factor enhancement on the thermoelectric figure of merit in Mg2Si0.4Sn0.6 based materials | ||||||||||||||||||||
| Autoren: |
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| Datum: | 21 Mai 2014 | ||||||||||||||||||||
| Erschienen in: | Physica Status Solidi (A) - Applications and Materials Science | ||||||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||||||
| Open Access: | Nein | ||||||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||||||
| In SCOPUS: | Ja | ||||||||||||||||||||
| In ISI Web of Science: | Ja | ||||||||||||||||||||
| Band: | 211 | ||||||||||||||||||||
| DOI: | 10.1002/pssa.201300196 | ||||||||||||||||||||
| Seitenbereich: | Seiten 1250-1254 | ||||||||||||||||||||
| Verlag: | Wiley | ||||||||||||||||||||
| ISSN: | 1862-6300 | ||||||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||||||
| Stichwörter: | magnesium silicide; microstructure; thermoelectric; transport properties | ||||||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
| HGF - Programm: | Verkehr | ||||||||||||||||||||
| HGF - Programmthema: | Bodengebundener Verkehr (alt) | ||||||||||||||||||||
| DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||
| DLR - Forschungsgebiet: | V BF - Bodengebundene Fahrzeuge | ||||||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | V - Fahrzeugenergiesystem III (alt) | ||||||||||||||||||||
| Standort: | Köln-Porz | ||||||||||||||||||||
| Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Thermoelektrische Materialien und Systeme | ||||||||||||||||||||
| Hinterlegt von: | Zabrocki, Dr. Knud | ||||||||||||||||||||
| Hinterlegt am: | 01 Dez 2014 10:37 | ||||||||||||||||||||
| Letzte Änderung: | 06 Nov 2023 14:21 |
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