Microstructural, dielectric, and piezoelectric properties of SFN-modified PZT ceramics

摘要

This study described the structural, dielectric, and piezoelectric behavior of (1-x)Pb(Zr_(0.51)Ti_(0.49))O3-xSm(Fe_(0.5), Nb_(0.5))O3 ceramics (PZT-SFN, x = 0.02, 0.04, 0.06, 0.08 and 0.10), prepared by a high-temperature solid-state reaction technique. X-ray diffraction, dielectric, and piezoelectric investigations were carried out to analyze the crystal structure. Preliminary X-ray structural analysis of the materials at room temperature has confirmed their formation in single-phase with tetragonal crystal structure. SFN-doping increased the sintered density and the average grain size of lead zirconate titanate ceramics. The room temperature dielectric permittivity ε_r, tangent loss tan δ, piezoelectric coefficient d_(31), electromechanical coupling factor kp, and mechanical quality factor Q_m of 0.92PZT-0.08SFN ceramics are 940, 1.43 %, 119 pC/N, 67.10 %, 326, respectively, which mean it has a great promise for actuator applications.