Title :
Effects of filler atoms on lattice thermal conductivity of RyFexCo4-xSb12 (R=Ba, Ce, Y)
Author :
Tang, X.F. ; Chen, L.D. ; Zhang, Q.J. ; Goto, T. ; Hirai, T. ; Yuan, R.Z.
Author_Institution :
State Key Lab. of Adv. Technol. for Mater. Synthesis & Process., Wuhan Univ. of Technol., China
Abstract :
Effects of filler atoms with different ionic radii Ba, Ce, Y on the lattice thermal conductivity of filled RyFexCo1-xSb12 are systematically investigated. The results show that the lattice thermal conductivity decreases significantly by filling Ba, Ce, Y atoms in Sb-icosahedral voids, and the reducing range of the lattice thermal conductivity increases in order of ionic radii decreasing from Ba2+, Ce3+ to Y3+. The lowest lattice thermal conductivity and strongest rattling actions of filler atoms with respect to scattering of phonons are gained when the Sb-icosahedral voids are partly filled.
Keywords :
barium compounds; cerium compounds; cobalt compounds; iron compounds; lattice constants; thermal conductivity; thermoelectricity; yttrium compounds; BayFexCo1-xSb12; CeyFexCo1-xSb12; Sb-icosahedral voids; YyFexCo4-xSb12; filler atoms; ionic radii; lattice thermal conductivity; rattling actions; Atmospheric measurements; Atomic measurements; Conducting materials; Conductivity measurement; Filling; Iron; Lattices; Plasma measurements; Thermal conductivity; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 2003 Twenty-Second International Conference on - ICT
Print_ISBN :
0-7803-8301-X
DOI :
10.1109/ICT.2003.1287460
