Control of thermoelectric properties in ZrO2/CoSb3 nano-dispersed composites
2007 (English)In: Materialwissenschaft und Werkstofftechnik, ISSN 0933-5137, E-ISSN 1521-4052, Vol. 38, no 9, 773-776 p.Article in journal (Refereed) Published
Nano-dispersed ZrO2/CoSb3 composites of various composition were prepared by uniaxial hot pressing of nano-sized powders of thermoelectric CoSb3 intermixed with ceramic nano-powders. The phase purity, the niicrostructure, and the temperature dependent transport parameters of the composites were investigated. Non-dispersed samples from nano-sized CoSb3 powders show higher electrical conductivity compared to melt-grown material which is attributed to the presence of a small excess of metallic Sb, but they exhibit lower thermal conductivity due to the fine-grained structure. Addition of 5 at.-% ZrO2 enhances the ratio of electrical to thermal conductivity, whereas hardly affects the See-beck coefficient. In this manner the nano-dispersion method provides an effective approach to improving the materials thermoelectric performance.
Place, publisher, year, edition, pages
2007. Vol. 38, no 9, 773-776 p.
nanocomposites, thermoelectric properties, ZrO2, CoSb3, transport-properties, cosb3, skutterudites, scattering
IdentifiersURN: urn:nbn:se:kth:diva-16966DOI: 10.1002/mawe.200700192ISI: 000249643500016ScopusID: 2-s2.0-34748867301OAI: oai:DiVA.org:kth-16966DiVA: diva2:335009
QC 201005252010-08-052010-08-05Bibliographically approved