Thermoelectric properties of perovskite-type rare earth cobalt oxide solid solutions Pr1-xDyxCoO3

Hideki Hashimoto, Takafumi Kusunose, Tohru Sekino

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Perovskite-type rare earth cobalt oxide Pr1-xDyxCoO3 (x = 0, 0.25, 0.5, 0.75 and 1) ceramics were fabricated by reaction sintering of the corresponding metal oxide powders, and their thermoelectric properties were evaluated up to 873 K. The electrical properties of Pr1-xDyxCoO3 varied according to a variation in the x value, whereas the thermal conductivity of the solid solutions (x = 0.25 - 0.75) tends to be lower than that of both end components (x = 0 and 1). As the results, Pr0.75Dy0.25CoO3 (x = 0.25) showed the highest figure of merit, Z = 5.72 × 10-5 K-1 at 773 K in the present Pr1-xDyxCoO3 system. This is considered due mainly to the effect of decreasing thermal conductivity caused by phonon scattering of partially substituted A-site ions. These results suggest that the fabrication of solid solutions is effective in improving the thermoelectric properties of the RCoO3 system.

Original languageEnglish
Pages (from-to)223-227
Number of pages5
JournalJournal of Ceramic Processing Research
Volume12
Issue number3
Publication statusPublished - 2011

Keywords

  • Perovskite
  • Phonon scattering
  • Rare earth cobalt oxides
  • Solid solutions
  • Thermoelectric properties

ASJC Scopus subject areas

  • Ceramics and Composites

Fingerprint Dive into the research topics of 'Thermoelectric properties of perovskite-type rare earth cobalt oxide solid solutions Pr<sub>1-x</sub>Dy<sub>x</sub>CoO<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this