Enhanced thermoelectric performance of skutterudites via orthogonal experimental design

JOURNAL OF ALLOYS AND COMPOUNDS

卷:695

Article

Deng, L.¹  Qin, J. M.¹  Jia, X. P.²  Guo, X.¹ 

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

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

关键词: Skutterudite;    Thermoelectric properties;    HPHT;    Seebeck coefficient;   

DOI  :  10.1016/j.jallcom.2016.11.332

来源: Elsevier

【 摘 要 】

A novel chemical alloying method of high-pressure and high-temperature (HPHT) has been used for the synthesis of bulk-skutterudite Te-doped CoSb3. Because the thermoelectric properties of skutterudites could be effectively optimized by changing synthetic pressure and temperature, and doping concentration, the orthogonal experimental design method has been applied. The Seebeck coefficient, electrical resistivity and thermal conductivity of CoSb3 were all performed in the temperature range of 371-710 K. The figure of merit, ZTs, increase with the increasing synthesis pressures until 2.3 GPa, and thereafter they decrease; the thermal conductivity decrease with the increasing synthesis pressures until 2.3 GPa, and thereafter they increase. At last, the maximum ZT value of sample Co4Sb11.5Te0.5 prepared at 2.3 GPa reached 1.03 at 710 K due to its lower thermal conductivity and higher power factor. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free