Piezoelectric Properties of Ferroelectric Ceramic Pb(Zr,Ti)O3 Doped with Sr and Fe

Abstract

The progress made in recent decades in the development of sensors and actuators go hand in hand with advances in materials science, particularly with the ferroelectric materials. Those having large piezoelectric constants and large electromechanical coupling factors. Therefore, it is very important improve the production process and also to make investigations about appropriate physical properties of these materials for technological development. The piezoelectric properties of ferroelectric ceramics of lead zirconate titanate were investigated in room temperature, in the monoclinic phase [Pb(Zr0.52, Ti0.48)O3] and tetragonal phase [Pb(Zr0.50, Ti0.50)O3], and doped with different concentrations of iso-valent (SrO) and hetero-valent (Fe2O3) elements. A strong dependence of the piezoelectric properties with the symmetry and the relative concentration of dopants were observed. The results are discussed in terms of defect formation via doping, and the interaction of them with ferroelectric domains.