The thermoelectric properties of BaxIn0.2-x Co4Sb11.5Te0.5 synthesized at different pressure

JOURNAL OF ALLOYS AND COMPOUNDS

卷:691

Article

Wang, L. B.¹  Ni, J.²  Jia, X. P.³  Qin, J. M.¹  Guo, X.¹  Deng, L.¹ 

[1] Changchun Univ Sci & Technol, Dept Mat Sci & Engn, Changchun 130022, Peoples R China

[2] FAW Volkswagen Automot Co Ltd, Changchun 130011, Peoples R China

[3] Jinlin Univ, Natl Lab Superhard Mat, Changchun 130012, Peoples R China

关键词: Thermoelectric properties;    Skutterudite;    HPHT;    Thermal conductivity;   

DOI  :  10.1016/j.jallcom.2016.08.256

来源: Elsevier

【 摘 要 】

A series of skutterudite compounds BaxIn0.2-x Co4Sb11.5Te0.5 (x - 0.05, 0.1, 0.15) have been prepared successfully by high pressure and high temperature (HPHT) method and then characterized with X-ray diffraction and electron microprobe analysis. The thermoelectric properties including Seebeck coefficient alpha, electrical resistivity rho and thermal conductivity kappa were measured at room temperature. As expected, with the synthetic pressure increased, the Seebeck coefficient and thermal conductivity of BaxIn0.2-xCo4Sb11.5Te0.5 both improved significantly. Moreover, the lattice thermal conductivity decreased distinctly with pressure increasing, which was mainly due to the abundant grain boundaries, which could enhance the phonon scattering effectively at grain boundaries. The test results suggest that the HPHT technique is a superior method to optimize thermoelectric properties of thermoelectric materials. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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