Domain Contribution to Dielectric Properties of Fine-Grained BaTiO3 Ceramics

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概要

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• Pure BaTiO3 ceramics with various grain sizes were prepared by a conventional sintering method, a two-step sintering method, and a rate-controlled two-step sintering method. The permittivity of the ceramics increased with decreasing grain size when the grain size was more than 1.1 μm, while that decreased when the grain size was below 1 μm. Field emission scanning electron microscopy (FE-SEM) observations revealed that most of the domains in BaTiO3 grains had simple lamellar structures, and 90° domain width decreased with decreasing grain size. By ultrawide range dielectric spectroscopy, the domain contribution to the permittivity was investigated. For the BaTiO3 ceramics with grain sizes over 1 μm, the dipole and ionic polarizabilities were enhanced by the high domain density. In contrast, for the BaTiO3 ceramics with grain sizes below 1 μm, these polarizabilities were weakened.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2009-09-25

著者

• Tsurumi Takaaki

  Nano-Phononics Lab., Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

• Takeda Hiroaki

  Nano-Phononics Lab., Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

• Hatta Saki

  Nano-Phononics Lab., Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

• Hoshina Takuya

  Nano-Phononics Lab., Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

• Kigoshi Yoichi

  Nano-Phononics Lab., Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

関連論文

• Shrinkage Behaviors and Sintering Mechanism of BaTiO3 Ceramics in Two-Step Sintering
• Size Effect of Nanograined BaTiO3 Ceramics Fabricated by Aerosol Deposition Method
• Identicalness between Piezoelectric Loss and Dielectric Loss in Converse Effect of Piezoelectric Ceramic Resonators (Special Issue : Ferroelectric Materials and Their Applications)
• Grain Size Effect on Dielectric Properties of Ba(Zr,Ti)O3 Ceramics
• Nonlinear Shear Responses of Lead Zirconate Titanate Piezoelectric Ceramics
• Mechanism Underlying Stacking-Layer Effect of Dielectric Properties of Multilayer Ceramic Capacitors
• Domain Contribution to Dielectric Properties of Fine-Grained BaTiO3 Ceramics

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