학술논문
Influence of Ir substitution on the thermoelectric properties of Ba0.3 (Irx Co1-x )4 Sb12 solid solutions.
Document Type
Article
Author
Source
Subject
*SKUTTERUDITE
*SOLID solutions
*THERMOELECTRIC materials
*THERMAL conductivity
*DIFFUSION bonding (Metals)
*SINTERING
*POINT defects
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Language
ISSN
0947-8396
Abstract
Polycrystalline skutterudite solid solutions, Ba0.3 (IrxCo1-x)4Sb12 (x from 0 to 0.11), have been synthesized by a two-step solid state reaction method and sintered by a spark plasma sintering (SPS) technique. The influence of Ir substitution on electrical and thermal transport properties has been investigated in the temperature range of 300–850 K. Through Ir substitution, the lattice thermal conductivity was depressed due to the phonon scattering by point defects. The thermopower and thermoelectric power factor increased because of the enhancement of carrier acoustic lattice scattering especially at lower temperatures. Both the dimensionless figure of merit (ZT) and the thermoelectric compatibility factor (CF), which play very important roles for applications, were improved over the whole temperature region. [ABSTRACT FROM AUTHOR]