Phase development and dielectric properties of (1-x)Pb(Zr0.52Ti0.48)O3-xBaTiO3 ceramics

(1-x)Pb(Zr0.52Ti0.49)O-3-xBaTiO(3) ceramics were prepared by a modified mixed-oxide method. The phase formation was studied by XRD analysis. All compositions exhibit complete solid solutions of perovskite-like phase in the (1-x)PZT-xBT system. The (200)/(002) peak was found to split at the composition x = 0.6 and the co-existence of tetragonal-rhombohedral phases occurs with x <= 0.6. The possible range of compositions which correspond to a phase. transition is 0.6 < x < 0.7. While pure BT ceramics exhibited a sharp phase transformation expected for normal ferroelectrics, phase transformation behavior of the (1-x)PZT-xBT solid solutions became more diffuse with increasing BT contents. This was primarily evidenced by an increased broadness in the dielectric peak, with a maximum peak width occurring at x = 0.5. (c) 2006 Elsevier B.V. All rights reserved.