Thermoelectric Properties of p-Type Tl-Filled Skutterudites: TlxFe1.5Co2.5Sb12

Polycrystalline samples of Tl-filled p -type skutterudites Tl x Fe 1.5 Co 2.5 Sb 12 ( x  = 0, 0.2, 0.4, 0.5, 0.6, and 0.7) were prepared and their high-temperature thermoelectric properties were examined from room temperature to 773 K. The samples with x  = 0.5 and 0.6 approximated to the skutterudi...

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Bibliographic Details
Published in:Journal of electronic materials 2014-12, Vol.44 (6), p.1743-1749
Main Authors: Choi, Seongho, Kurosaki, Ken, Yusufu, Aikebaier, Ohishi, Yuji, Muta, Hiroaki, Yamanaka, Shinsuke
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electronics and Microelectronics
Instrumentation
Materials Science
Optical and Electronic Materials
Solid State Physics
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Summary:Polycrystalline samples of Tl-filled p -type skutterudites Tl x Fe 1.5 Co 2.5 Sb 12 ( x  = 0, 0.2, 0.4, 0.5, 0.6, and 0.7) were prepared and their high-temperature thermoelectric properties were examined from room temperature to 773 K. The samples with x  = 0.5 and 0.6 approximated to the skutterudite single phase, although all samples contained some secondary phases. On the other hand, all samples showed a positive Seebeck coefficient, and the Tl-filled samples exhibited definitely low thermal conductivity in comparison with the non-filled one. The sample with x  = 0.4 yielded the highest dimensionless figure of merit of 0.30 at 724 K.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-014-3539-x