Preparation and thermoelectric properties of high-performance Sb additional Yb{sub 0.2}Co{sub 4}Sb{sub 12+y} bulk materials with nanostructure

Journal Article · Mon May 19 00:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2936277· OSTI ID:21102025

Han, Li; Xinfeng, Tang; Xianli, Su; Qingjie, Zhang ^[1]

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1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (China)

High-performance Sb excess Yb{sub 0.2}Co{sub 4}Sb{sub 12+y} (y=0,0.3,0.6,1.0) bulk materials with nanostructure have been prepared by combining melt spinning technique with spark plasma sintering. Average grain size of the bulk samples is about 150 nm when y=0 and 0.3, and the grain size increases with the increase of y. Moderately superfluous Sb may improve the electrical transport properties effectively and the thermal conductivity of the bulk samples decreases markedly due to the nanostructure. The thermoelectric performance of the samples is significantly improved, and the maximum figure of the merit reaches 1.26 for the Yb{sub 0.2}Co{sub 4}Sb{sub 12.3} compound at 800 K.

• OSTI ID: 21102025
• Journal Information: Applied Physics Letters, Vol. 92, Issue 20; Other Information: DOI: 10.1063/1.2936277; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIMONY ALLOYS
CHARGE TRANSPORT
COBALT ALLOYS
GRAIN SIZE
NANOSTRUCTURES
PERFORMANCE
PLASMA
SINTERING
THERMAL CONDUCTIVITY
THERMOELECTRIC PROPERTIES
THERMOELECTRICITY
YTTERBIUM ALLOYS