Oxide Ion Conduction <i>via</i> Interstitial Sites in the Substituted Scheelite- and Spinel-type Oxides

DOI Web Site Web Site 4 Citations 58 References Open Access
  • ESAKA Takao
    Department of Chemistry & Biotechnology, Graduate School of Engineering, Tottori University

Bibliographic Information

Other Title
  • Oxide ion conduction via interstitial sites in the substituted scheelite- and spinel-type oxides

Search this article

Description

In the purely academic interests to find new and high oxide ion conductors, we investigated on the electrical conduction in the substituted scheelite- and spinel-type oxides. In the former, the substitution methods shown by Pb1−xLnxWO4+x/2 and Pb1−xLn2x/3WO4 (Ln: Lanthanoid element) to intend to increase the concentration of defects brought about formation of the PbWO4-based scheelite-type solid solutions, where the enhanced oxide ion conductivities were observed compared with that of the based material. From the structural and density measurements, the charge carriers in those phases were considered to be interstitial oxide ions. On the other hand, electrical conduction was also studied in many substituted spinel type oxides. Although the oxide ions would be generally hard to move considering from their cubic-packed form, the enhanced oxide ion conductivities were observed in the inverse spinel type solid solutions based on Zn2TiO4. A typical sample was Zn2−x/2Ti1−xTaxO4, the ionic conduction of which was considered to be due to the interstitialcy oxide ion migration. These results are mentioned in relation to the defect crystal phases.

Journal

  • Electrochemistry

    Electrochemistry 78 (1), 16-22, 2010

    The Electrochemical Society of Japan

Citations (4)*help

See more

References(58)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top