TY - JOUR
T1 - Influence of Ir substitution on the thermoelectric properties of Ba 0.3(IrxCo1-x)4Sb12 solid solutions
AU - Pei, Y. Z.
AU - Chen, L. D.
AU - Zhao, X. Y.
AU - Zhang, W. Q.
AU - Li, X. Y.
AU - Goto, T.
PY - 2006/12
Y1 - 2006/12
N2 - Polycrystalline skutterudite solid solutions, Ba0.3 (Ir xCo1-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.
AB - Polycrystalline skutterudite solid solutions, Ba0.3 (Ir xCo1-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.
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U2 - 10.1007/s00339-006-3719-5
DO - 10.1007/s00339-006-3719-5
M3 - Article
AN - SCOPUS:33750144851
VL - 85
SP - 451
EP - 455
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
SN - 0947-8396
IS - 4
ER -