NANDIHALLI, Nagaraj; LIANG, Robert; GORSSE, Stéphane; MORI, Takao; ZHOU, Norman; KLEINKE, Holger

doi:10.1016/j.matchemphys.2020.124061

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NANDIHALLI, Nagaraj
Department of Chemistry [Waterloo]
Institute for Nanotechnology [Waterloo]

LIANG, Robert
Institute for Nanotechnology [Waterloo]
Centre of Advanced Materials Joining

GORSSE, Stéphane
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Materials Chemistry and Physics. 2021-02, vol. 260, p. 124061 (9 p.)

Elsevier

Résumé en anglais

Polycrystalline Ni0.05Mo3Sb5.4Te1.6 thermoelectric (TE) material samples were mixed with NiSb nanoparticles (60–80 nm) in 0, 0.034, 0.074 and 0.16 vol fractions, then hot-pressed and their TE transport properties were characterized. There was a gradual increase in electrical conductivity with the addition of NiSb nanoparticles. The electrical conductivity (σ) of the 0.16 sample was increased by 163% compared to the NiSb-free sample. Except for the 0.16 sample, all samples showed alloy scattering (σ ~ T−0.5). With an increase in NiSb content, the Fermi energy appeared to be reduced, getting closer to the valence band edge. For all samples, the variation in lattice thermal conductivity with temperature (κl ~ T−0.27) was very similar, indicating that the mode of phonon scattering was the same in all samples.< Réduire

Mots clés en anglais

NiSb nanoparticles

Solvothermal synthesis

Thermoelectric properties

Interfaces

Mechanical properties

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Transport properties of a molybdenum antimonide-telluride with dispersed NiSb nanoparticles

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