Effect of grain size on the nonlinear dielectric properties of PLZT ceramics

• Published in: Ferroelectrics 1998-07, Vol.215 (1), p.139-152
• Main Authors: Moon, Y. W., Li, G., Haertling, G.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric properties of solids and liquids; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Niobates, titanates, tantalates, pzt ceramics, etc; Permittivity (dielectric function); Physics
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150199808229558

Dielectric nonlinear behavior was investigated for 1/53/47 PLZT ceramics with different grain sizes. Different grain sizes were achieved by employing various sintering conditions. By measuring the dielectric constant as a function of ac electric field at various temperatures and frequencies, it was found that the dielectric nonlinearity was affected by grain size, i.e., the samples having larger grains showed a higher degree of dielectric nonlinearity. In addition, the dielectric nonlinearity was found to be influenced substantially by the frequency of applied field and sample temperature. Based on analysis of X-ray diffraction peak intensity ratio of (002) to (200) planes, the experimental results were discussed in terms of the contribution of 90° domain wall motion.