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Beneficial effect of Ni substitution on the thermoelectric properties in Ca<sub>y</sub>Co<sub>4-x</sub>Ni<sub>x</sub>Sb<sub>12</sub> skutterudites

Puyet, Matthieu and Dauscher, Anne and Lenoir, Bertrand and Dehmas, Michel and Stiewe, Christian and Müller, Eckhard and Hejtmanek, Jiri (2005) Beneficial effect of Ni substitution on the thermoelectric properties in Ca<sub>y</sub>Co<sub>4-x</sub>Ni<sub>x</sub>Sb<sub>12</sub> skutterudites. Journal of Applied Physics, 97 (8), 083712-1-083712-4. American Institute of Physics. DOI: 10.1063/1.1868083 ISSN 0021-8979

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Official URL: http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000097000008083712000001&idtype=cvips

Abstract

We have investigated the influence of nickel doping in a series of n-type CoSb<sub>3</sub> skutterudite materials partially filled with Ca. The electrical resistivity, thermopower, and thermal conductivity have been measured in the 300–800 K temperature range on Ca<sub>y</sub>Co<sub>4-x</sub>Ni<sub>x</sub>Sb<sub>12</sub> compounds prepared by a powder metallurgy route. The chemical composition and structure have been analyzed by electron probe microanalyses and X-ray diffraction, respectively. It was found that the presence of nickel substantially decreases the electrical resistivity without any detrimental effect on the thermopower, resulting in an improvement of the power factor. The dimensionless thermoelectric figure ZT increases with increasing temperature and reaches a maximum value of 1 at 800 K.

Item URL in elib:https://elib.dlr.de/21434/
Document Type:Article
Title:Beneficial effect of Ni substitution on the thermoelectric properties in Ca<sub>y</sub>Co<sub>4-x</sub>Ni<sub>x</sub>Sb<sub>12</sub> skutterudites
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Puyet, MatthieuINPL, Ecole des Mines, Nancy, FRUNSPECIFIED
Dauscher, AnneINPL, Ecole des Mines, Nancy, FRUNSPECIFIED
Lenoir, BertrandINPL, Ecole des Mines, Nancy, FRUNSPECIFIED
Dehmas, MichelINPL, Ecole des Mines, Nancy, FRUNSPECIFIED
Stiewe, ChristianUNSPECIFIEDUNSPECIFIED
Müller, EckhardUNSPECIFIEDUNSPECIFIED
Hejtmanek, JiriCzech Academy of Science, PragueUNSPECIFIED
Date:11 April 2005
Journal or Publication Title:Journal of Applied Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:97
DOI :10.1063/1.1868083
Page Range:083712-1-083712-4
Publisher: American Institute of Physics
ISSN:0021-8979
Status:Published
Keywords:thermoelectric materials, Skutterudites, doping, thermoelectric properties, Seebeck coefficient, electrical conductivity, thermal conductivity
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Structural and Functional Ceramics
Deposited By: Müller, Dr.phys. Wolf Eckhard
Deposited On:04 Sep 2007
Last Modified:27 Apr 2009 04:55

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