Title :
Thermoelectric properties of the new skutterudites (Ce-Yb)yFe4-x(Co/Ni)xSb12
Author :
Bérardan, D. ; Alleno, E. ; Godart, Claude ; Puyet, M. ; Lenoir, B. ; Dauscher, A. ; Ravot, D. ; Bauer, E.
Author_Institution :
Lab. de Chimie Metallurgique des Terres-Rares, ISCSA UPR 209, Thiais, France
Abstract :
Polycrystalline p-type and n-type skutterudites belonging to the family (Ce-Yb)yFe4-x(Co/Ni)xSb12 have been synthesized using a standard arc-melting method and subsequent annealing. They have been characterized using X-ray diffraction (XRD) and electron probe microanalysis (EPMA). Yb valence state was estimated using X-ray absorption spectroscopy (XAS) at the Yb L3 edge which evidences an evolution of the Yb mixed valence state in the various series. Thermoelectric properties have been investigated between 120K and 800K by mean of thermopower and electrical conductivity measurements.
Keywords :
X-ray absorption spectra; X-ray diffraction; cerium compounds; cobalt compounds; crystal structure; electrical conductivity; electron probe analysis; iron compounds; mixed valence compounds; nickel compounds; thermal conductivity; thermoelectricity; ytterbium compounds; (Ce-Yb)yFe4-x(Co/Ni)xSb12; (CeYb)yFe4-x(CoNi)xSb12; 120 to 800 K; X-ray absorption spectroscopy; X-ray diffraction; Yb valence state; annealing; arc-melting method; electrical conductivity; electron probe microanalysis; mixed valence state; skutterudites; thermoelectric properties; thermopower; Annealing; Electromagnetic wave absorption; Electrons; Iron; Probes; Spectroscopy; State estimation; Thermoelectricity; X-ray diffraction; X-ray scattering;
Conference_Titel :
Thermoelectrics, 2003 Twenty-Second International Conference on - ICT
Print_ISBN :
0-7803-8301-X
DOI :
10.1109/ICT.2003.1287450
