Abstract
In this study, the effects of calcination temperature and sintering temperature on the phase formation, microstructure and electrical properties of the 0.65PMN-0.35PZ (PMN-PZ) ceramics were investigated. These ceramics were prepared by combustion technique. The pure pseudo-cubic perovskite phase of PMN-PZ powders was obtained for the sample calcined at 850°C for 2 h. The PMN-PZ ceramics exhibited the pure pseudo-cubic perovskite phase for the samples sintered at the temperatures lower than 1200°C. When the sintering temperature increased, the average grain size increased from 0.46 to 2.36 μm. The density, linear shrinkage and maximum dielectric constant of PMN-PZ ceramics increased with increasing sintering temperatures up to 1200°C and then decreased. The highest density, highest linear shrinkage and highest dielectric constant at Tc of 7.76 g/cm3 , 11.86% and 20052 respectively, were obtained on the sample sintered at 1200°C. The Pr , Ec , (using electric field of 30 kV/cm) and d33 of 24.27 μC/cm2, 3.49 kV/cm and 150 pC/N, respectively, were measured on this sample.
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