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- W2798077172 abstract "The “phonon-glass/electron-crystal” approach has been implemented through incorporation of “rattlers” into skutterudite void sites to increase phonon scattering and thus increase the thermoelectric efficiency. Indium filled IrSb3 skutterudites are reported for the first time. Polycrystalline samples of InxIr4Sb12 (0 ≤ x ≤ 0.2) were prepared by solid-state reaction under a gas mixture of 5% H2 and 95% Ar. The solubility limit of InxIr4Sb12 was found to be close to 0.18. Synchrotron X-ray diffraction refinements reveal all InxIr4Sb12 phases crystallized in body-centered cubic structure (space group:Im3¯) with ∼8% antimony site vacancy and with indium partially occupying the 16f site. Unlike known rattler filled skutterudites, under synthetic conditions employed, indium filling in IrSb3 significantly increases the electrical resistivity and decreases the Seebeck coefficient (n-type) while reducing the thermal conductivity by ∼30%. The resultant power factor offsets the decrease in total thermal conductivity giving rise to a substantial decrease in ZT. Principal thermoelectric properties of InxM4Sb12 (M = Co, Rh, Ir) phases are compared. As iridium is a 5d transition metal, zero field cooled (ZFC) magnetization were performed to unravel the effect of spin-orbit interaction on the electronic properties. These results serve to advance the understanding of filled skutterudites, and provide additional insight on the less explored smaller “rattlers” and their influence on key thermoelectric properties." @default.
- W2798077172 created "2018-04-24" @default.
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- W2798077172 date "2018-06-01" @default.
- W2798077172 modified "2023-10-16" @default.
- W2798077172 title "Structural, electronic, and thermal properties of indium-filled In x Ir 4 Sb 12 skutterudites" @default.
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- W2798077172 doi "https://doi.org/10.1016/j.solidstatesciences.2018.04.011" @default.
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