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Study of the frequency-dependence of the complex permittivity in Ba(Zr,Ti)O3 ceramics: evidences of the grain boundary phenomena

L. MITOSERIU1,* , C. E. CIOMAGA1, I. DUMITRU1, L. P. CURECHERIU1, F. PRIHOR1, A. GUZU1

Affiliation

  1. Dept. of Solid State and Theor. Physics, Faculty of Physics, Al. I. Cuza Univ., 11 Bv. Carol I, 700506 Iasi, Romania

Abstract

The frequency-dependence of the complex permittivity of some Ba(Zr,Ti)O3 ferroelectric ceramics was investigated, with the aim to evidence different behaviors related to microstructural characteristics. Ferroelectric BaZr0.10Ti0.90O3 sintered at two temperatures gave different types of impedance spectra due to their differences in the microstructures. The multiple components in the complex impedance diagram result from the grain boundary phenomena, i.e. from local differences in the conductivity and dielectric properties of the ceramic grain bulk and ceramic grain boundary..

Keywords

Polycrystalline ceramics, Dielectric relaxation, Grain boundary phenomena.

Submitted at: April 1, 2008
Accepted at: July 1, 2008

Citation

L. MITOSERIU, C. E. CIOMAGA, I. DUMITRU, L. P. CURECHERIU, F. PRIHOR, A. GUZU, Study of the frequency-dependence of the complex permittivity in Ba(Zr,Ti)O3 ceramics: evidences of the grain boundary phenomena, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 7, pp. 1843-1846 (2008)