Nanostructured thermoelectric skutterudite Co$_{1-x}$Ni$_{x}$Sb$_{3}$ alloys
ORAL
Abstract
Nanostructured Ni-doped skutterudites Co$_{1-x}$Ni$_{x}$Sb$_{3}$ (with x ranging from 0.01 to 0.09) have been prepared by ball-milling and direct-current induced hot press. It was found that the thermal conductivity was much reduced due to strong electrons-phonons scaterring from Ni-doping and grain boundary phonons scattering from nano-structures in the samples. A maximum dimensionless figure-of-merit of 0.71 has been obtained in Co$_{0.91}$Ni$_{0.09}$Sb$_{3}$ at 525 \r{ }C.
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