Nonlinear dielectric response and elastic properties of a PZT-based multicomponent system

Abstract

Nonlinear character of the dielectric response and the behavior of longitudinal ultrasonic waves velocity in a piezoceramic material 0.36PbTiO₃–0.33PbZrO₃–0.17Pb(MgZn)_1/3Nb_2/3O₃–BaTiO₃–SrZrO₃ based on PZT are studied. It is established that anomalies in the temperature-field dependences of the effective permittivity ε´_eff(E,T) and the velocity of the longitudinal ultrasonic wave v(T) arise in the temperature region, substantially below the temperature of the permittivity maximum T_m = 160 °C. The nature of these anomalies indicates the relaxor-like properties of this type of ferroelectric ceramics, where the coexistence of different phase states of the material is possible in a wide temperature range.

Keywords:

• multicomponent systems
• ferroelectrics-relaxors
• phase transitions
• electrophysical and mechanical properties
• linear change