D. W. Johnson—contributing editor
Effect of Grain Size on Dielectric Nonlinearity in Model BaTiO3-Based Multilayer Ceramic Capacitors
Article first published online: 3 SEP 2010
© 2010 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 1, pages 194–199, January 2011
How to Cite
Fujii, I., Trolier-McKinstry, S. and Nies, C. (2011), Effect of Grain Size on Dielectric Nonlinearity in Model BaTiO3-Based Multilayer Ceramic Capacitors. Journal of the American Ceramic Society, 94: 194–199. doi: 10.1111/j.1551-2916.2010.04058.x
This work was supported by the Center for Dielectric Studies at the Pennsylvania State University and a National Security Science and Engineering Faculty Fellowship.
- Issue published online: 5 JAN 2011
- Article first published online: 3 SEP 2010
- Manuscript No. 28110. Received May 30, 2010; approved July 10, 2010.
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.