Get access

Effect of Grain Size on Dielectric Nonlinearity in Model BaTiO3-Based Multilayer Ceramic Capacitors

Authors

  • Ichiro Fujii,

    Corresponding author
    1. Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
      †Author to whom correspondence should be addressed. e-mail: ifujii@yamanashi.ac.jp
    Search for more papers by this author
  • Susan Trolier-McKinstry,

    1. Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
    Search for more papers by this author
  • Craig Nies

    1. Advanced Products and Technology Center, AVX Corporation, Myrtle Beach, South Carolina 29579
    Search for more papers by this author

  • D. W. Johnson—contributing editor

  • This work was supported by the Center for Dielectric Studies at the Pennsylvania State University and a National Security Science and Engineering Faculty Fellowship.

†Author to whom correspondence should be addressed. e-mail: ifujii@yamanashi.ac.jp

Abstract

First-order reversal curve (FORC) distributions as well as the ac field dependence of the dielectric permittivity were investigated for model BaTiO3-based multilayer ceramic capacitors in which the dielectric grain size was varied from 0.28 to 0.39 μm. It was found that as the grain size decreased, the high-field dielectric permittivity, the peak in the irreversible FORC distribution at origin, and the reversible FORC distribution at zero bias decreased. The reversible FORC distribution of all the parts converged at high biases, indicating that the grain size dependence was influenced by domain wall contributions. Dielectric contributions from the core and shell were estimated based on the temperature dependence of the permittivity. Not unexpectedly, the relative response of the core decreased while that of the shell increased as the grain size decreased. A Preisach model using the measured FORC distribution gave a good fit to the experimental polarization–electric field loops.

Get access to the full text of this article

Ancillary