Article (Scientific journals)
Neutron diffraction and thermoelectric properties of indium filled InxCo4Sb12 (x = 0.05, 0.2) and indium cerium filled Ce0.05In0.1Co4Sb12 skutterudites
Sesselmann, A.; Klobes, B.; Dasgupta, T. et al.
2016In Physica Status Solidi A. Applications and Materials Science, 213 (3), p. 766-773
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Keywords :
Sb deficiency; Cerium; Electron probe microanalysis; Indium; Microanalysis; Neutron diffraction; Neutrons; Thermoelectric equipment; Annealing treatments; Einstein temperature; Filled skutterudites; Filled-skutterudite; High sensitivity; Powder neutron diffraction; Thermoelectric properties; Thermoelectrics; Skutterudites
Abstract :
[en] 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. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Disciplines :
Chemistry
Author, co-author :
Sesselmann, A.;  Institute of Materials Research, German Aerospace Center (DLR), Linder Hoehe, Köln, Germany
Klobes, B.;  Jülich Centre for Neutron Science JCNS, Peter Grünberg Institute PGI, JARA-FIT, Forschungszentrum Jülich GmbH, Jülich, Germany
Dasgupta, T.;  Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Mumbai, India
Gourdon, O.;  Los Alamos National Laboratory, LANSCE, Los Alamos, NM, United States
Hermann, Raphaël ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Mueller, E.;  Institute of Materials Research, German Aerospace Center (DLR), Linder Hoehe, Köln, Germany, Institute of Inorganic and Analytical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 58, Giessen, Germany
Language :
English
Title :
Neutron diffraction and thermoelectric properties of indium filled InxCo4Sb12 (x = 0.05, 0.2) and indium cerium filled Ce0.05In0.1Co4Sb12 skutterudites
Publication date :
2016
Journal title :
Physica Status Solidi A. Applications and Materials Science
ISSN :
1862-6300
eISSN :
1862-6319
Publisher :
Wiley - VCH Verlag, Weinheim, Germany
Volume :
213
Issue :
3
Pages :
766-773
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
VH NG-407 “Lattice dynamics in emerging functional materials.”; DFG priority program SPP-1386 “Nanostructured Thermoelectrics”
Funders :
VH NG-407 “Lattice dynamics in emerging functional materials.”
DOE - United States. Department of Energy [US-OR]
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