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

Shinji Hirata; Michitaka Ohtaki

doi:10.5109/2740934

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

Shinji Hirata, Michitaka Ohtaki

Functional Materials Science

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Evergreen
Volume	7
Issue number	1
DOIs	https://doi.org/10.5109/2740934
Publication status	Published - Mar 2020

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Surfaces, Coatings and Films
Management, Monitoring, Policy and Law

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title = "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",

abstract = "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.",

author = "Shinji Hirata and Michitaka Ohtaki",

note = "Funding Information: The authors would like to thank Assoc. Prof. K. Suekuni and Assist. Prof. K. Watanabe for their valuable discussion, and Fukuoka Industrial Technology Center for XRD measurement and SEM observation. This work was financially supported by JSPS KAKENHI Grant Number JP19H02800. Funding Information: This work was financially supported by JSPS KAKENHI Grant Number JP19H02800. Publisher Copyright: {\textcopyright} 2020, Novel Carbon Resource Sciences. All rights reserved.",

year = "2020",

month = mar,

doi = "10.5109/2740934",

language = "English",

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T1 - 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

AU - Hirata, Shinji

AU - Ohtaki, Michitaka

N1 - Funding Information: The authors would like to thank Assoc. Prof. K. Suekuni and Assist. Prof. K. Watanabe for their valuable discussion, and Fukuoka Industrial Technology Center for XRD measurement and SEM observation. This work was financially supported by JSPS KAKENHI Grant Number JP19H02800. Funding Information: This work was financially supported by JSPS KAKENHI Grant Number JP19H02800. Publisher Copyright: © 2020, Novel Carbon Resource Sciences. All rights reserved.

PY - 2020/3

Y1 - 2020/3

N2 - 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.

AB - 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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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

Abstract

All Science Journal Classification (ASJC) codes

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