High-temperature thermoelectric performance of (W1−xTix)18O49

Nhat Quang Minh Tran, Michitaka Ohtaki, Koichiro Suekuni

Research output: Contribution to journalArticlepeer-review

Abstract

High-temperature thermoelectric properties of tungsten-based Magnéli 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.

Original languageEnglish
JournalJournal of the European Ceramic Society
DOIs
Publication statusAccepted/In press - 2021

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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