Fine grains ceramics of PIN–PT, PIN–PMN–PT and PMN–PT systems: Drift of the dielectric constant under high electric field

Abstract

Lead-based ferroelectric ceramics with (1− x)Pb(B 1 B 2)O 3– xPbTiO 3 formula have emerged as a group of promising materials for various applications like ultrasonic sonars or medical imaging transducers. (1− x)PMN– xPT, (1− x)PIN– xPT and ternary solutions xPIN– yPMN– zPT ceramics are synthesised using the solid state reaction method. Our objective is to achieve higher structural transition temperatures than those of PMN–PT ceramics with as good dielectric, piezoelectric and electromechanical properties. Ceramics capacitance and loss tangent are measured when the ac field of measurement increases up to E = 500 V/mm. Behaviours of these materials under ac field are related to their coercive field and Curie temperature.