Effects of strontium ion doping on the thermoelectric properties of dysprosium cobalt oxide

Hideki Hashimoto, Takafumi Kusunose, Tohru Sekino

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We prepared Dy1-XSrxCoO3-8(x = 0,0.025) ceramics and evaluated their thermoelectric performances at temperatures up to 873 K. The sample in which x = 0.025 showed a higher electrical conductivity and a lower Seebeck coefficient than that in which x = 0. Due to phonon scattering, die thermal conductivity of die x = 0.025 sample was lower dian diat of die x = 0 sample over the entire range measured although die carrier component of diermal conductivity of die x = 0.025 sample was slightly larger man that of the x = 0 sample. Due to die effects of an increase of the electrical conductivity and a decrease of the thermal conductivity, die sample in which x = 0.025 showed die highest figure of merit, Z = 5.7 × 10-5K-1, at 773 K in die present system. These results imply mat die partial substitution of a larger and lighter divalent cation for the trivalent cation of die A-site effectively enhanced die diermoelectric performance of the RCoO3 svstem.

Original languageEnglish
Pages (from-to)404-407
Number of pages4
JournalMaterials Transactions
Volume51
Issue number2
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Dysprosium cobalt oxide
  • Perovskite
  • Strontium ion
  • Thermoelectric properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Effects of strontium ion doping on the thermoelectric properties of dysprosium cobalt oxide'. Together they form a unique fingerprint.

Cite this