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Chen, Nancy und Gascoin, Frank und Müller, Eckhard und Karpinski, Gabriele und Stiewe, Christian und Snyder, Jeffrey G. (2005) Macroscopic Thermoelectric Inhomogeneities in (AgSbTe<sub>2</sub>)<sub>x</sub>(PbTe)<sub>1-x</sub> materials. Applied Physics Letters, 87, 171903-1-171903-3. American Institute of Physics. doi: 10.1063/1.2056590.
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Offizielle URL: http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=APPLAB000087000017171903000001&idtype=cvips
Kurzfassung
Exceptionally high thermoelectric figure of merit (zT>2), has been reported for (Ag<sub>1-y</sub>SbTe<sub>2</sub>)<sub>0.05</sub>(PbTe)<sub>0.95</sub>, which may involve the nanoscale microstructure. However, conflicting reports on the same materials claim only zT of 1 or less. Here we show that (Ag<sub>1-y</sub>SbTe<sub>2</sub>)<sub>0.05</sub>(PbTe)<sub>0.95</sub> materials are multiphase on the scale of millimeters despite appearing homogeneous by x-ray diffraction and routine electron microscopy. Using a scanning Seebeck microprobe, we find significant variation of Seebeck coefficient (including both n-type and p-type behavior in the same sample) that can explain the discrepancy in reported zT. More homogeneous samples can be prepared with faster cooling rates.
| elib-URL des Eintrags: | https://elib.dlr.de/21453/ | ||||||||||||||||||||||||||||
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| Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||
| Titel: | Macroscopic Thermoelectric Inhomogeneities in (AgSbTe<sub>2</sub>)<sub>x</sub>(PbTe)<sub>1-x</sub> materials | ||||||||||||||||||||||||||||
| Autoren: |
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| Datum: | 17 Oktober 2005 | ||||||||||||||||||||||||||||
| Erschienen in: | Applied Physics Letters | ||||||||||||||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||||||||||||||
| Open Access: | Nein | ||||||||||||||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||||||||||||||
| In SCOPUS: | Nein | ||||||||||||||||||||||||||||
| In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||
| Band: | 87 | ||||||||||||||||||||||||||||
| DOI: | 10.1063/1.2056590 | ||||||||||||||||||||||||||||
| Seitenbereich: | 171903-1-171903-3 | ||||||||||||||||||||||||||||
| Verlag: | American Institute of Physics | ||||||||||||||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||||||||||||||
| Stichwörter: | thermoelectric materials, tellurides, thermoelectric properties, figure of merit, Seebeck coefficient, inhomogeneity, Seebeck microprobe | ||||||||||||||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||
| HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||
| HGF - Programmthema: | Antriebe (alt) | ||||||||||||||||||||||||||||
| DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||
| DLR - Forschungsgebiet: | L ER - Antriebsforschung | ||||||||||||||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtuelles Triebwerk und Validierungsmethoden (alt) | ||||||||||||||||||||||||||||
| Standort: | Köln-Porz | ||||||||||||||||||||||||||||
| Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Keramische Struktur- und Funktionswerkstoffe | ||||||||||||||||||||||||||||
| Hinterlegt von: | Müller, Dr.phys. Wolf Eckhard | ||||||||||||||||||||||||||||
| Hinterlegt am: | 03 Sep 2007 | ||||||||||||||||||||||||||||
| Letzte Änderung: | 24 Apr 2024 19:03 |
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