Leakage Current Properties of Cation-Substituted BiFeO3 Ceramics

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概要

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• Cation-doped BiFeO3 ceramics were fabricated by sintering coprecipitated and calcined powders at 700–900 °C to study the effect of cation doping on the leakage current properties of the sintered samples. Among the dopants examined in this study, Ti4+, Sn4+, or Zr4+ doping was found to effectively reduce the leakage current of the samples. In particular, a marked decrease in the leakage current density was achieved at 10% Ti4+ doping, which also resulted in the structure change from rhombohedral to cubic. The codoping of Ti4+/Zn2+ ions or Ti4+/Ni2+ ions brought about a substantial reduction in the leakage current density of the bulk samples by about four or five orders of magnitude at a small doping amount of 2%. This can be explained by the combined effect of Ti4+ doping, which basically contributes to the decreased number of oxygen vacancies in the sample, and Zn2+ or Ni2+ doping, which might assist the homogeneous substitution of Ti4+ ions for the Fe3+ sites.

• 2010-09-25

著者

• Adachi Nobuyasu

  Ceramic Research Laboratory Nagoya Institute Of Technology

• Ota Toshitaka

  Ceramic Res. Lab. Nagoya Inst. Of Technol.

• Abe Kazutomo

  Division Of Materials Chemistry Graduate School Of Engineering Hokkaido University

• Itoh Hidenobu

  Department Of Materials Science And Engineering Kitami Institute Of Technology

• Takahashi Junichi

  Division Of Materials Chemistry Graduate School Of Engineering Hokkaido University

• Itoh Hidenobu

  Department of Materials Science, Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido 090-8507, Japan

• Sakai Noriyoshi

  Division of Materials Chemistry, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628, Japan

• Adachi Nobuyasu

  Ceramics Research Laboratory, Nagoya Institute of Technology, 10-6-29 Asahigaoka, Tajimi, Gifu 507-0071, Japan

• Abe Kazutomo

  Division of Materials Chemistry, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628, Japan

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