Ferroelectric and pyroelectric properties of 0.8PbZr<inf>0.52</inf>Ti<inf>0.48</inf>O<inf>3</inf>-0.2BaFe<inf>0.5</inf>Nb<inf>0.5</inf>O<inf>3</inf>ceramics

Abstract

The solid solution 0.8PbZr0.52Ti0.48O3-0.2BaFe0.5Nb0.5O3(P8B2) ceramic was prepared by the mixed oxide method. The aim of this work is to focus on the ferroelectric and pyroelectric properties of the ceramic. The phase formation behavior was studied using X-ray diffraction (XRD) methods. The ferroelectric properties were measured by a Sawyer-Tower circuit. Particularly, we measured the dielectric and pyroelectric properties by an automatic corrected data with Hewlett-Packard LCZ meter in the environmental chamber. The optimum conditions for fabrication of 0.8PZT-0.2BFN ceramics were found at 1100°C for calcination and 1200°C for sintering temperature. From the hysteresis loop measurement, the remanent polarization (Pr) and coercive field were 21 μC/cm2and 6.4 kV/cm, respectively. The phase transition temperatures (Tc) obtained by pyroelectric measurements are in good agreement with the values obtained from the dielectric study.