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Thermoelectric properties of boron doped iron disilicide

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5 Author(s)
Y. Isoda ; Nat. Res. Inst. for Metals, Ibaraki, Japan ; Y. Shinohara ; Y. Imai ; I. A. Nishida
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B doped β-FeSi2 has high thermal shock resistance. The effect of B doping on thermoelectric properties of β-FeSi2 has been investigated. B doped FeSi2 was a solid solution in the composition range 0<x⩽0.03. It was found that B atoms acted as donors in the whole composition range of x. The Seebeck coefficient of FeSi2 was almost six times higher and also electrical resistivity was less than a quarter by B doping, because of hopping conduction. Lattice thermal conductivity was reduced by 20% by B doping of x=0.03. Mn doped p-type FeSi2 has even lower effective maximum power Peff by B doping, while Peff of Co doped n-type samples was not affected by the doping. High thermal shock resistance was successfully given to Co doped n-type FeSi 2 by B doping

Published in:

Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on

Date of Conference:

24-28 May 1998