Study on Phases and Thermoelectric Properties of Bulk FexCo4-xSb12 Sintered by MM-SPS

Ke Gao Liu; Shi Lei

doi:10.4028/www.scientific.net/AMR.179-180.294

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 179-180Study on Phases and Thermoelectric Properties of...

Study on Phases and Thermoelectric Properties of Bulk Fe_xCo_4-xSb₁₂ Sintered by MM-SPS

Abstract:

Bulk FexCo4-xSb12 with x varies from 0.1 to 2.0 were prepared by mechanical milling (MM) and spark plasma sintering (SPS). The phases of the products were characterized by X-ray diffraction (XRD) and their thermoelectric properties were tested by electric constant instrument and laser thermal constant instrument. Experimental results show that, the major phases of bulk FexCo4-xSb12 are skutterudite. The electrical resistivities of the products increase first and then decrease. The Seebeck coefficients ( ) are negative when x=0.1 at 100 °C and 200 °C while positive at 300~500 °C. The products with x=0.5~2.0 at 100~500 °C are P type semiconducting materials due to their positive values. The thermal conductivities of most samples increase first and then decrease with x increasing and the maximum is up to 0.39 Wm-1K-1 when x=1.0. The ZT values at 200~500 °C increase first and then decrease with x increasing when x=0.1~1.0 and x=1.0~2.0 respectively and the maximum ZT value is 0.196 when x=1.5 at 400 °C.

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Advanced Materials Research (Volumes 179-180)

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294-297

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https://doi.org/10.4028/www.scientific.net/AMR.179-180.294

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Online since:

January 2011

Authors:

Ke Gao Liu, Shi Lei

Keywords:

Skutterudite, Spark Plasma Sintering (SPS), Thermoelectric Property

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