Synthesis and thermoelectric properties of Nd-single filled p-type skutterudites

doi:10.1088/1674-1056/27/4/047203

Abstract

We report the synthesis of Nd-filled and Fe substituted p-type Nd_xFe_3.2Co_0.8Sb₁₂ (x=0.5, 0.6, 0.7, 0.8, and 0.9) skutterudites by the solid-state reaction method. The influences of Nd filler on the electrical and thermal transport properties are investigated in a temperature range from room temperature to 850 K. A lowest lattice thermal conductivity of 0.88 W·m^-1·K^-1 is obtained in Nd_0.8Fe_3.2Co_0.8Sb₁₂ at 673 K, which results from the localized vibration modes of fillers and the increase of grains boundaries. Meanwhile, the maximum power factor is 2.77 mW·m^-1·K^-2 for the Nd_0.9Fe_3.2Co_0.8Sb₁₂ sample at 668 K. Overall, the highest dimensionless figure of merit zT=0.87 is achieved at 714 K for Nd_0.9Fe_3.2Co_0.8Sb₁₂.

Keywords: thermoelectric p-type skutterudites neodymium filler lattice thermal conductivity

Received: 02 September 2017
Revised: 05 October 2017
Accepted manuscript online:

PACS:	72.15.Jf	(Thermoelectric and thermomagnetic effects)
	74.25.fg	(Thermoelectric effects)
	74.25.fc	(Electric and thermal conductivity)
	74.25.F-	(Transport properties)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11674040, 11404044, 51472036, 51672270, and 51401202), the Fundamental Research Funds for the Central Universities (Grant No. 106112016CDJZR308808), the 100 Talent Program of the Chinese Academy of Sciences (Grant No. 2013-46), and the Project for Fundamental and Frontier Research in Chongqing, China (Grant No. CSTC2015JCYJBX0026).

Corresponding Authors: Xiao-Yuan Zhou
E-mail: xiaoyuan2013@cqu.edu.cn

Cite this article:

Hong Wu(吴宏), Nusrat Shaheen, Heng-Quan Yang(杨恒全), Kun-Ling Peng(彭坤岭), Xing-Chen Shen(沈星辰), Guo-Yu Wang(王国玉), Xu Lu(卢旭), Xiao-Yuan Zhou(周小元) Synthesis and thermoelectric properties of Nd-single filled p-type skutterudites 2018 Chin. Phys. B 27 047203

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Synthesis and thermoelectric properties of Nd-single filled p-type skutterudites

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