Beneficial effect of Ni substitution on the thermoelectric properties in partially filled Ca{sub y}Co{sub 4-x}Ni{sub x}Sb{sub 12} skutterudites

Journal Article · Fri Apr 15 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1868083· OSTI ID:20668316

Puyet, M; Dauscher, A; Lenoir, B; Dehmas, M; Stiewe, C; Mueller, E; Hejtmanek, J ^[1]

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1. Laboratoire de Physique des Materiaux, UMR 7556, Ecole Nationale Superieure des Mines de Nancy, Parc de Saurupt, F-54042 Nancy (France)

We have investigated the influence of nickel doping in a series of n-type CoSb{sub 3} 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}Co{sub 1-x}Ni{sub x}Sb{sub 12} 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.

• OSTI ID: 20668316
• Journal Information: Journal of Applied Physics, Vol. 97, Issue 8; Other Information: DOI: 10.1063/1.1868083; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIMONY ALLOYS
CALCIUM ALLOYS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
COBALT ALLOYS
ELECTRON PROBES
INTERMETALLIC COMPOUNDS
NICKEL
NICKEL ALLOYS
POWDER METALLURGY
POWER FACTOR
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
THERMAL CONDUCTIVITY
THERMOELECTRIC PROPERTIES
X-RAY DIFFRACTION