Nano Archive

Nano ZrO2/CoSb3 composites with improved thermoelectric figure of merit

He, Zeming and Stiewe, Christian and Platzek, Dieter and Karpinski, Gabriele and Mueller, Eckhard and Li, Shanghua and Toprak, Muhammet and Muhammed, Mamoun (2007) Nano ZrO2/CoSb3 composites with improved thermoelectric figure of merit. NANOTECHNOLOGY, 18 (23).

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Nano ZrO2/CoSb3 composites with different ZrO2 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.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
ID Code:6367
Deposited By:IoN
Deposited On:28 Sep 2009 11:03
Last Modified:28 Sep 2009 11:03

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