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Author Bertini, L. ♦ Billquist, K. ♦ Christensen, M. ♦ Gatti, C. ♦ Holmgren, L. ♦ Iversen, B. ♦ Mueller, E. ♦ Muhammed, M. ♦ Noriega, G. ♦ Palmqvist, A. ♦ Platzek, D. ♦ Rowe, D.M. ♦ Saramat, A. ♦ Stiewe, C. ♦ Toprak, M. ♦ Williams, S.G. ♦ Zhang, Y.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2003
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Thermoelectricity ♦ Thermal conductivity ♦ Grain boundaries ♦ Scattering ♦ Chemicals ♦ Heat treatment ♦ Temperature ♦ Powders ♦ Resistance heating ♦ Phonons
Abstract CoSb/sub 3/ skutterudites have been prepared by a new chemical method of co-precipitating the constituents from an aqueous solution and subsequent heat treatment at comparably low temperature, resulting in nano-grained powder and thus in a very high concentration of grain boundaries. Under certain conditions grain boundary scattering is expected to be more effective on heat carrying phonons than on charge carriers, causing an increased ratio of electrical to thermal conductivity (/spl sigma///spl kappa/ ratio). Furthermore to overcome the expected reduction of the electrical conductivity by the grain boundary scattering skutterudites with various substitution of Co by Ni and of Sb by Te as well as combined substitutions have been prepared. Their structural and thermoelectric properties have been investigated, i.e. electrical and thermal conductivity as well as Seebeck coefficient and figure of merit. ZT values up to 0.67 at 680 K have been found for these samples.
Description Author affiliation: Ist. di Sci. e Tecnologie Molecolari, Milano, Italy (Bertini, L.)
ISBN 078038301X
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2003-08-17
Publisher Place France
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 284.24 kB
Page Count 4
Starting Page 48
Ending Page 51

Source: IEEE Xplore Digital Library