Effect Of Zr/Ti Ratio On Piezoelectric And Dielectric Propertiesof 0.1pb[Fe1/2nb1/2]O-3-0.9pb[Zrxti(1-X)]O-30 Ceramics

This study describes the microstructure, crystal structure, dielectric and piezoelectric behavior of 0.1Pb[Fe1/2Nb1/2]O-3-0.9Pb[ZrxTi(1-x)]O-3 (x = 0.49-0.55) ceramics synthesized by solid-state reaction. Compositions were sintered at 1180(o)C for 120 min. Dense and uniform microstructure was seen through microstructural analysis. XRD pattern confirmed the co-existence of tetragonal and rhombohedral perovskite phases in these compositions where 0.51 <= x <= 0.53. Compositions with 0.51 <= x <= 0.53 resulted in the optimum values of properties, viz. dielectric constant (epsilon(rr)) of 1150, piezoelectric coefficient (d(31) ) of 95x10(-12) C/N, piezoelectric voltage constant (g(31) ) of 70x10(-3) mV/N and the coupling factor (k(p) ) value of 0.67. Results indicated that this material composition could be suitable for power harvesting and sensor applications.