Research of High Sensitivity Piezoelectric Ceramics Based on Pb(Sb1/2Nb1/2)O3-Pb(ZrTi)O3.

It is of great practical significance to improve the sensitivity and enhance the stability of lead zirconate titanate (PZT) piezoelectric ceramics under hydrostatic pressure condition. In this work, the xPb(Sb_1/2Nb_1/2)O₃-(1 - x)Pb(Zr_0.52Ti_0.48) (PSN-PZT, x = 0. 018, 0. 020, 0. 022, 0. 025, 0. 030) piezoelectric ceramics were prepared with conventional solid-state method. The influence of PSN on the phase, microscopic morphology, curie temperature, dielectric property, ferroelectric property, and piezoelectric properties of ceramics has investigated. The sensitivity of PSN-PZT and traditional high sensitivity piezoelectric ceramics was measured comparatively within the hydrostatic pressure of 5 - 30 MPa. The results show that the incorporation of PSN can improve the sensitivity and enhance the hydrostatic figure of merit (HFOM) of PZT piezoelectric ceramics significantly. When x = 0. 020, the PSN-PZT ceramics have the best electric properties, planar electromechanical coupling factor kp =0. 641, longitudinal piezoelectric strain constant d33 = 325 pC/ N, transverse piezoelectric voltage constant g31 =16. 642 mV·m·N^-1, isostatic piezoelectric voltage constant gh (5 MPa) = 9. 91 mV·m^-1 ·Pa^-1, HFOM (5 MPa) =679 x 10^-15 Pa^-1. [ABSTRACT FROM AUTHOR]