Electrophysical and mechanical properties of PZT-based soft ferroelectric material in wide range of temperatures

Abstract

The electrophysical and mechanical properties of a piezoceramic material based on a PZT are studied. Several features in the behavior of the electrophysical properties of the material in the temperature range located substantially lower than the low-frequency (1 kHz) maximum of the permittivity ${\mathrm{T}}_{\mathrm{m}}=160°\mathrm{C}$ are revealed. The obtained results indicate the closeness of the material studied to ferroelectrics-relaxors, in particular, due to the low coercive field ${\mathrm{E}}_{\mathrm{c}}\sim 5\mathrm{kV}/\mathrm{cm},$ significant dependence of ${\mathrm{T}}_{\mathrm{m}}$ on the frequency and amplitude of the measuring field, and also the behavior of the velocity of longitudinal ultrasonic waves in the studied ceramics.

Keywords:

• PZT system
• ferroelectric soft ceramics
• dispersion
• polarization
• elastic properties
• diffuse phase transitions