Abstract
In this work, we report dielectric, piezoelectric and ferroelectric properties of perovskite Ba0.95Sr0.05ZrxTi(1−x)O3 (BSZT, x=0.05, 0.10, 0.15, 0.20) ceramics synthesized by using a solid-state reaction method. It is demonstrated that when the Zr concentration was 5at% and the sintering temperature was 1400°C, the BSZT ceramic gives the best overall electromechanical performance, including a large remnant polarization of ~ 12.1µC/cm2, large dielectric constants (εrpeak≈12,600, εrRT≈3500) and an excellent d33 value of ~355pC/N. Curie temperature of this ceramic is about ~100°C. The enhanced electromechanical properties of the BSZT ceramics as compared with Ba0.95Sr0.05TiO3 (BST) can be explained by optimization of the tolerance factor and shift of ferroelectric polymorphic phase transition temperatures (TPPT).
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