Nano ZrO2/CoSb3 composites with improved thermoelectric figure of merit
2007 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 18, no 23, 235602- p.Article in journal (Refereed) Published
Nano ZrO2/CoSb3 composites with different ZrO 2 contents were prepared using hot pressing. The phase purity, the microstructure and the temperature-dependent transport parameters of the composites were investigated. The dimensionless figure of merit (ZT) of 0.18 of the non-dispersed CoSb3 preponderates the maximal value (0.17) of pure CoSb3 reported in the literature, which is attributed to the prepared sample having higher electrical conductivity due to the existence of a small amount of metallic Sb and lower thermal conductivity due to the fine-grained structure. Compared to non-dispersed CoSb3, a further improvement of 11% on ZT (0.20) was achieved in the composite with 0.05ZrO 2 inclusions, which resulted from the enhanced ratio of electrical conductivity to thermal conductivity and the Seebeck coefficient. The nanodispersion method provides an effective approach to improving a material's thermoelectric properties and performance.
Place, publisher, year, edition, pages
2007. Vol. 18, no 23, 235602- p.
Cobalt compounds, Electric conductivity, Hot pressing, Seebeck coefficient, Thermal conductivity, Zirconia
IdentifiersURN: urn:nbn:se:kth:diva-8686DOI: 10.1088/0957-4484/18/23/235602ISI: 000246590700010ScopusID: 2-s2.0-34249097404OAI: oai:DiVA.org:kth-8686DiVA: diva2:14072
QC 201009232008-06-042008-06-042010-09-23Bibliographically approved