Nanostructured Thermoelectric Skutterudite Co1−x Ni x Sb3 Alloys
Nanostructured Ni-doped skutterudites Co1−x
Ni
x
Sb3 (with x ranging from 0.01 to 0.09) were prepared by ball milling and direct-current induced hot press. It was found that the thermal conductivity was reduced due to strong electron–phonon
scattering from Ni-doping as well as phonon scattering from the increased grain boundary of the nanostructures. A maximum dimensionless figure-of-merit of 0.7 was obtained in Co0.91Ni0.09Sb3 at 525 °C.
Keywords: BALL MILLING; HOT PRESS; LOW THERMAL CONDUCTIVITY; NANOSTRUCTURE; SKUTTERUDITES
Document Type: Short Communication
Publication date: 01 August 2008
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