Simultaneous Enhancement in the Electrical Conductivity and Reduction in the Lattice Thermal Conductivity Leading to Enhanced Thermoelectric ZT Realized by Incorporation of Metallic Nanoparticles into Oxide Matrix | Zendy

Shinji Hirata | Zendy; Michitaka Ohtaki | Zendy

Open Access

Simultaneous Enhancement in the Electrical Conductivity and Reduction in the Lattice Thermal Conductivity Leading to Enhanced Thermoelectric ZT Realized by Incorporation of Metallic Nanoparticles into Oxide Matrix

Author(s) -

Shinji Hirata,

Michitaka Ohtaki

Publication year - 2020

Publication title -

evergreen

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.378

H-Index - 11

eISSN - 2432-5953

pISSN - 2189-0420

DOI - 10.5109/2740934

Subject(s) - materials science , thermal conductivity , thermoelectric effect , metal , nanoparticle , thermoelectric materials , oxide , lattice (music) , condensed matter physics , electrical resistivity and conductivity , matrix (chemical analysis) , conductivity , nanotechnology , composite material , metallurgy , thermodynamics , chemistry , physics , acoustics , quantum mechanics

Nanoporous Fe3O4 composites containing metallic Cu nanoparticles were synthesized by reducing-leaching treatment of CuFe2O4 precursor. Thermoelectric properties of the composites sintered at 1270 oC greatly improved compared with Fe3O4 without Cu, presumably due to a nanoporous structure and the Cu nanoparticles remaining in the Fe3O4 matrix after acid leaching. The electrical and thermal conductivity indicate that Cu in the matrix promotes the electron conduction and suppresses the phonon conduction, improving the dimensionless figure-of-merit, ZT.

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