Abstract

Dielectric, ferroelectric and piezoelectric properties of xPb(Mg1/3Nb2/3)O3-(1-x)(Pb0.988 La0.012)(Zr0.535Ti0.465)O3 ceramic system synthesized through columbite precursor method are investigated. X-ray diffraction patterns of ceramics indicated pseudocubic phase formation with pyrochlore phase. Grain growth (4.47 m) and apparent density (7.68 gm/cm3) enhanced remarkably in 0.8PMN-0.2PLZT composition, respectively. Increasing PMN content remarkably increased both room temperature dielectric permittivity (RT = 2316) and dielectric maximum (Tc = 24747) in 0.6PMN-0.4PLZT composition, respectively. PMN substitution in PLZT system enhanced the ferroelectric remanent (Pr = 28.4 C/cm2) and spontaneous (Ps = 31.2 C/cm2) polarization while coercive field (Ec) continuously decreased in xPMN-(1-x)PLZT system. PMN modification in PLZT system influenced piezoelectric properties (d33, kp and kt) throughout the PMN-PLZT system.