Stiewe, Christian und Bertini, Luca und Toprak, Muhammed und Platzek, Dieter und Williams, Simon und Gatti, Carlo und Müller, Eckhard und Muhammed, Mamoun und Rowe, Michael (2005) Nanostructured Co<sub>1-x</sub>Ni<sub>x</sub>(Sb<sub>1-y</sub>Te<sub>y</sub>)<sub>3</sub> Skutterudites: Theoretical Modelling, Synthesis and Thermoelectric Properties. Journal of Applied Physics, 97 (4), 044317-1-044317-7. American Institute of Physics. doi: 10.1063/1.1852072. ISSN 0021-8979.
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Kurzfassung
The properties of Te-doped Co(Sb<sub>1-y</sub>Te<sub>y</sub>)<sub>3</sub> and Te-Ni double-doped Co<sub>1-x</sub>Ni<sub>x</sub>(Sb<sub>1-y</sub>Te<sub>y</sub>)<sub>3</sub> nanostructured skutterudites were evaluated by means of x-ray powder diffraction, and transport properties measured on the synthesized samples have been compared with ab initio theoretical modeling. Theoretical optimal dopant contents have been evaluated according to the maximum value of the power factor, calculating the electronic transport properties from the ab initio material band structure using semiclassical Boltzmann transport theory. The samples have been synthesized by chemical alloying with Te substitution for Sb up to 2.5 at.% and Ni substitution for Co up to 2.0 at.%. X-ray powder diffraction has been performed on all samples to reveal information about phase purity and Rietveld refinement was performed for the phase composition and cell parameter. The thermoelectric properties of the resulting consolidates were investigated in a temperature range from 300 to 723 K using various measurement facilities. A standardization and round robin program was started among the participating evaluation laboratories in order to ensure reliability of the data obtained. The significant reduction in thermal conductivity, when compared to highly annealed CoSb<sub>3</sub>, could be proved which is caused by the nanostructuring, resulting in a high concentration of grain boundaries. A combination of substitution levels for Ni and Te has been found resulting in the largest ZT value of 0.65 at 680 K among unfilled skutterudite materials.
elib-URL des Eintrags: | https://elib.dlr.de/21435/ | ||||||||||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||||||||||
Titel: | Nanostructured Co<sub>1-x</sub>Ni<sub>x</sub>(Sb<sub>1-y</sub>Te<sub>y</sub>)<sub>3</sub> Skutterudites: Theoretical Modelling, Synthesis and Thermoelectric Properties | ||||||||||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 28 Januar 2005 | ||||||||||||||||||||||||||||||||||||||||
Erschienen in: | Journal of Applied Physics | ||||||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||||||||||
Band: | 97 | ||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1063/1.1852072 | ||||||||||||||||||||||||||||||||||||||||
Seitenbereich: | 044317-1-044317-7 | ||||||||||||||||||||||||||||||||||||||||
Verlag: | American Institute of Physics | ||||||||||||||||||||||||||||||||||||||||
ISSN: | 0021-8979 | ||||||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||||||
Stichwörter: | thermoelectric materials, Skutterudites, doping, thermoelectric properties, Seebeck coefficient, electrical conductivity, thermal conductivity | ||||||||||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||||||||||||||||||||||||||||||||||
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: | 04 Sep 2007 | ||||||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 27 Apr 2009 04:55 |
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