Effect of Poling Conditions on Hysteresis Properties of Lead Magnesium Niobate-Lead Zirconate Titanate Ceramics

Abstract

xPMN-(1-x)PZT ceramic composites with formula xPb(Mg1/3Nb2/3)O3-(1-x)Pb(Zr0.52Ti0.48)O3 (when x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) were prepared by aconventional mixed-oxide method. The phase formation behavior of these ceramics wasstudied by an x-ray diffraction method. The hysteresis properties of the ceramics poled atdifferent DC electric fields were measured by a simple Sawyer-Tower circuit. Generally, itwas found that poling conditions have little or no effect on hysteresis properties of PMNrichedcompositions but show marked effects on those of PZT-riched compositions. For thePMN ceramic, the polarization values, both remanent polarization (Pr) and spontaneouspolarization (Ps), increase at the poling field is 10-20 kV/cm and little decrease at 30-40kV/cm while the coercive field (Ec) remains constant. As for the PZT ceramic, the remanentpolarization (Pr), the spontaneous polarization (Ps), and the coercive field (Ec) increase withincreasing the poling field.