Annealing Effect on the Thermoelectric Properties of Undoped CoSb3

Il Ho Kim; Jung Il Lee; Soon Chul Ur; Kyung Wook Jang; Good Sun Choi; Joon Soo Kim

doi:10.4028/www.scientific.net/SSP.118.565

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HomeSolid State PhenomenaSolid State Phenomena Vol. 118Annealing Effect on the Thermoelectric Properties...

Annealing Effect on the Thermoelectric Properties of Undoped CoSb₃

Abstract:

Binary skutterudite CoSb3 compounds were prepared by the arc melting and hot pressing processes and their thermoelectric properties were investigated at 300K-600K. Annealing effect was examined and it was correlated to phase transformation and homogenization. Thermoelectric properties of the arc-melted and hot-pressed CoSb3 were discussed and compared. Undoped CoSb3 prepared by the arc melting showed p-type conduction and metallic behavior at all temperatures examined. However, hot pressed specimens showed n-type conduction, possibly due to Sb evaporation. Thermoelectric properties were remarkably improved by annealing in vacuum and they were closely related to phase transitions.

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Periodical:

Solid State Phenomena (Volume 118)

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565-570

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.118.565

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Online since:

December 2006

Authors:

Il Ho Kim, Jung Il Lee, Soon Chul Ur, Kyung Wook Jang, Good Sun Choi, Joon Soo Kim

Keywords:

Annealing, Arc-Melting, Hot-Pressing, Skutterudite, Thermoelectric

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