Ni掺杂n型填充方突石Ba/sub 0.3/Co/sub 4/Sb/sub 12/的低温热电性能

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI:10.1109/ICT.2001.979824

W. Chen, J. Dyck, C. Uher, L.D. Chen, X.F. Tang, T. Hirai

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引用次数: 1

摘要

合成了以Ni掺杂Ba/sub 0.3/Ni/sub x/Co/sub 4-x/Sb/sub 12/ 0/spl les/x/spl les/0.2的n型Ba填充方晶，并测量了其塞贝克系数、导热系数、电阻率和霍尔系数。在800 K时ZT达到1.2,x=0.05。拟合了热导率数据，并通过共振散射项识别了Ba原子的咔嗒效应。研究了霍尔迁移率，提出了基于单一刚性带图的声子和电离杂质的混合散射机制。讨论了镍原子在提高热电性能中的作用。

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Low temperature thermoelectric properties of Ni doped n-type filled skutterudites Ba/sub 0.3/Co/sub 4/Sb/sub 12/

n-type Ba filled skutterudites doped with Ni, Ba/sub 0.3/Ni/sub x/Co/sub 4-x/Sb/sub 12/ with 0/spl les/x/spl les/0.2, have been synthesized and the Seebeck coefficient, thermal conductivity, electrical resistivity and Hall coefficient have been measured. ZT of 1.2 has been achieved at 800 K with x=0.05. The thermal conductivity data are fitted and the rattling effect of the Ba atoms is identified through a resonance scattering term. The Hall mobility is studied and a mixed scattering mechanism of acoustic phonons and ionized impurities based on a single, rigid band picture is presented. The role of Ni atoms in enhancing the thermoelectric performance is discussed.

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Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)

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