Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 42, Issue 4, Pages 1486-1492Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.12.014
Keywords
Thermal conductivity; Electrical conductivity; Transitional metal oxides; Spark plasma sintering; Thermoelectricity
Categories
Funding
- JSPS KAKENHI [JP19H02800]
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High-temperature thermoelectric properties of tungsten-based Magne'li phase oxide (W1-xTix)18O49 (0 < x < 0.25) prepared by solid state reaction followed by densification via spark plasma sintering (SPS) were studied. The Ti substitution increased the Seebeck coefficient, the power factor, and decreased both the electronic and lattice thermal conductivity, leading to a significantly high ZT of 0.50 +/- 0.07 at 1073 K for the sample with x = 0.2.
High-temperature thermoelectric properties of tungsten-based Magne ' li phase oxide (W1-xTix)18O49 (0 < x < 0.25) prepared by solid state reaction followed by densification via spark plasma sintering (SPS) were studied. The Ti substitution increased the Seebeck coefficient, the power factor, and decreased both the electronic and lattice thermal conductivity. The synergistic substitution effect on the electrical and thermal properties and inherently low total thermal conductivity of 1.46 +/- 0.08 WK-1 m-1 originating from the tunnel-like crystal structure of the oxide led to a significantly high ZT of 0.50 +/- 0.07 at 1073 K for the sample with x = 0.2.
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