Title :
Thermoelectric properties of boron doped iron disilicide
Author :
Isoda, Y. ; Shinohara, Y. ; Imai, Y. ; Nishida, I.A. ; Ohashi, O.
Author_Institution :
Nat. Res. Inst. for Metals, Ibaraki, Japan
Abstract :
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
Keywords :
Seebeck effect; boron; electrical resistivity; hopping conduction; impurity states; iron compounds; semiconductor materials; solid solutions; thermal conductivity; thermal shock; thermoelectric power; β-FeSi2:B; B doping effects; FeSi2:B; FeSi2:Co,B; FeSi2:Mn,B; Seebeck coefficient; composition dependence; donors; effective maximum power; electrical resistivity; hopping conduction; lattice thermal conductivity; n-FeSi2:Co,B; p-FeSi2:Mn,B; solid solution; thermal shock resistance; thermoelectric properties; Boron; Doping; Electric resistance; Electric shock; Iron; Lattices; Solids; Thermal conductivity; Thermal resistance; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740401
