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Neutron diffraction and thermoelectric properties of indium filled InxCo4Sb12 (x = 0.05, 0.2) and indium cerium filled Ce0.05In0.1Co4Sb12 skutterudites

Sesselmann, Andreas J. and Klobes, Benedikt and Dasgupta, Titas and Gourdon, Oliver and Hermann, Raphael P. and Müller, Eckhard (2015) Neutron diffraction and thermoelectric properties of indium filled InxCo4Sb12 (x = 0.05, 0.2) and indium cerium filled Ce0.05In0.1Co4Sb12 skutterudites. Physica Status Solidi (A) - Applications and Materials Science. Wiley. DOI: 10.1002/pssa.201532589 ISSN 1862-6300

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Abstract

The thermoelectric properties on polycrystalline single (In) and double filled (Ce, In) skutterudites are characterized between 300 and 700 K. Powder neutron diffraction measurements of the skutterudite compositions InxCo4Sb12 (x = 0.05, 0.2) and Ce0.05In0.1Co4Sb12 as a function of temperature (12–300 K) were carried out, which gives more insight into the structural data of single and double-filled skutterudites. Results show that due to the annealing treatment, a Sb deficiency is detectable and thus verifies defects at the Sb lattice site of the skutterudite. Furthermore, we show by electron microprobe analysis that a considerable amount of indium is lost during synthesis and post-processing for the single indium filled samples, but not for the double cerium and indium skutterudite sample. In our experiments, the double-filled skutterudite is superior to the single-filled skutterudite composition due to a higher charge carrier density, a comparable lattice thermal resistivity, and a higher density of states effective mass. Furthermore, we obtained a significantly higher Einstein temperature for the double-filled skutterudite composition in comparison to the single-filled species, which reflects the high sensitivity due to filling of the void lattice position within the skutterudite crystal.

Item URL in elib:https://elib.dlr.de/100148/
Document Type:Article
Title:Neutron diffraction and thermoelectric properties of indium filled InxCo4Sb12 (x = 0.05, 0.2) and indium cerium filled Ce0.05In0.1Co4Sb12 skutterudites
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sesselmann, Andreas J.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Klobes, BenediktJuelich Centre for Neutron Science und P. Gruenberg Inst. PGI, JARA-FIT, FZ Juelich, 52425UNSPECIFIED
Dasgupta, TitasDepartment of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, IndiaUNSPECIFIED
Gourdon, OliverLos Alamos National Laboratory, LANSCE, New Mexico 87545, USAUNSPECIFIED
Hermann, Raphael P.Peter Grünberg Institut and Jülich Centre for Neutron Science, JARA-FIT, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany and Faculte des Sciences, Universite de Liege, B-4000, Liege, BelgiumUNSPECIFIED
Müller, EckhardGerman Aerospace Center, Institute of Materials Research, Köln, Germany and Justus Liebig University Giessen, Institute of Inorganic and Analytical Chemistry, 35392 Giessen, GermanyUNSPECIFIED
Date:15 October 2015
Journal or Publication Title:Physica Status Solidi (A) - Applications and Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1002/pssa.201532589
Publisher:Wiley
ISSN:1862-6300
Status:Published
Keywords:neutron diffraction; Sb deficiency; skutterudites; thermoelectrics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Zabrocki, Dr. Knud
Deposited On:30 Nov 2015 09:36
Last Modified:06 Sep 2019 15:29

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