Effect of Poling Parameter on Piezoelectric and Dielectric Properties of La and Sr Doped PZT

Abstract

La and Sr co-doped, modified lead zirconium titanate (PZT) ceramics, with composition Pb0.93La0.02Sr0.05 (Zr0.52Ti0.48) O3 was synthesized by dry-mixed planetary mill. The incorporation of La 3+ and Sr 2+ in the PZT lattice enhanced the tetragonality and suppressed grain growth thereby promoted piezoelectric and dielectric properties of the ceramics. The objective of this research is to determine the optimum poling parameters on La and Sr co-doped PZT (PLSZT) for better electrical properties. The optimum poling parameters (temperature, electric field and time) have been investigated via design of experiment (DOE) concept for the effective results. The results showed that when using the poling temperature at 140 °C with 4 kV/mm of electric field, the d33 and ɛᵣ values were found to be highest at 327 pC/N and 1620, respectively. It revealed that poling temperature and applied electric field plays a dominant role in influencing electrical performance of PLSZT which may be suitable for possible device applications.