Preparation, characterization and electrical property of Mn-doped ceria-based oxides

CH Y. Kang, H. Kusaba, H. Yahiro, K. Sasaki, Y. Teraoka

研究成果: Contribution to journalArticle査読

55 被引用数 (Scopus)


Manganese-doped ceria-based oxides, Ce1-xMnxO2-δ (0.05 ≤ x ≤ 0.3) and Ce1-x-yGdxMnyO2-δ ̇ (0.05 ≤ x≤ 0.2, 0.05 ≤ y ≤ 0.25) were synthesized, and crystal phase analysis by XRD and measurements of electrical properties were performed. Solubility limit of Mn in Ce1-xMnxO2-δ ̇ seemed to be between 5 mol% and 10 mol% and Mn3O4 was the main by-product above the solubility limit in the case of heat treatment at 1300 °C. Judging from the oxygen partial pressure dependence of total conductivity and emf measurements, Ce1-xMnxO2-δ ̇ is a single-phase mixed conductor within the composition below the solubility limit, and when the composition of Mn exceeds the solubility limit, it becomes the dual-phase mixed conductor of Ce1-xMnxO2-δ ̇ and Mn3O4. The doing of Mn in gadlia-doped ceria, Ce1-x-yGdxMnyO2-δ ̇ (0.05 ≤ x ≤ 0.2, 0.05 ≤ y ≤ 0.25), was more difficult than that in CeO2 presumably due to the preferential reaction between Gd and Mn to give GdMnO3 to the GDC solid solution formation, and the Mn doping seems not to be so effective in preparing the mixed ionic-electronic conductor based on GDC.

ジャーナルSolid State Ionics
19-25 SPEC. ISS.
出版ステータス出版済み - 10 15 2006

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学


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