Thermoelectric properties of Ba3Co2O6(CO3)0.7 containing one-dimensional CoO6 octahedral columns

• Iwasaki, Kouta

• Yamamoto, Teruhisa

• Yamane, Hisanori

• Takeda, Takashi

• Arai, Shigeo

• Miyazaki, Hidetoshi

• Tatsumi, Kazuyoshi

• Yoshino, Masahito

• Ito, Tsuyoshi

• Arita, Yuji

• Muto, Shunsuke

• Nagasaki, Takanori

• Matsui, Tsuneo

抄録

The thermoelectric properties of Ba3Co2O6(CO3)0.7 have been investigated using prismatic single crystals elongated along the c axis. Ba3Co2O6(CO3)0.7 has a pseudo-one-dimensional structure similar to that of 2H perovskite-type BaCoO3 and contains CoO6 octahedral columns running parallel to the c axis. The prismatic crystals are grown by a flux method using a K2CO3–BaCl2 flux. The electrical conductivity(σ) along the columns (c axis) exhibits a metallic behavior (670–320 S cm−1 in the temperature range of 300–1100 K), whereas the temperature dependence of the electrical conductivity perpendicular to the c axis is semiconducting. The Seebeck coefficient (S) along the columns is positive and greater than 100 μV K−1 over the measuredtemperature range (116–128 μV K−1). Ba3Co2O6(CO3)0.7 shows power factors (σS2) of 5.5×10−4–9.0×10−4 W m−1 K−2 above room temperature, relatively high values for an oxide material.

収録刊行物

• Journal of Applied Physics

  Journal of Applied Physics 106 (3), 034905-034905, 2009-08

  AIP

キーワード

• Carbon dioxide
• Electrical conductivity
• Crystal structure
• Sodium
• Temperature measurement

詳細情報

• CRID: 1050001338803447680
• NII論文ID: 120005496487
• HANDLE: 2237/20785
• ISSN: 00218979
• Web Site: https://nagoya.repo.nii.ac.jp/records/18690
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles
  • KAKEN