Paper Title:

High-Temperature Transport Properties of Indium Added Cobalt-Antimonide Based Skutterudites Processed by Current Assisted Short-Term Sintering

Periodical Advances in Science and Technology (Volume 74)
Main Theme 5th FORUM ON NEW MATERIALS PART C
Edited by Pietro VINCENZINI, Kunihito KOUMOTO, Nicola ROMEO and Mark MEHOS
Pages 54-59
DOI 10.4028/www.scientific.net/AST.74.54
Citation Andreas Sesselmann et al., 2010, Advances in Science and Technology, 74, 54
Online since October 2010
Authors Andreas Sesselmann, Ralf Hassdorf, Sebastian Zastrow, Eckhard Müller
Keywords Filling, Skutterudites, Substitution, Thermoelectric Energy Conversion, Transport Property
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For more than a decade, skutterudites such as cobalt antimonides have been widely studied as a promising thermoelectric (TE) material for high-temperature applications. High thermoelectric figure of merit (ZT) in this material system can be achieved by suitable doping or by filling the interstitial voids with guest atoms. One of the best improvements in ZT is reported when indium (In) is used as additive to cobalt-antimonide skutterudites, as has been done in this study. Compaction of the grinded powders was carried out by a current-assisted short-term sintering device, which significantly reduces the process time in comparison to conventional hot pressing. Phase homogeneity of the bulk material has been probed by X-ray powder diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX). TE properties (i.e. electrical conductivity, Seebeck coefficient and thermal conductivity) have been analyzed in the temperature range from 300 K to 700 K. The functional homogeneity of the samples was screened by the Potential & Seebeck Microprobe (PSM). Adapted from these results the effect of indium addition to short-term sintered cobalt-antimonide based skutterudites with absence of impurity phases will be discussed.

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