Poling Effects of Piezoelectric Properties of Modified BCZT Ceramics with High Piezoelectric Performance

Abstract

Due to the toxic of lead content ceramics, many free piezoelectric ceramics have received much attention. To obtain high piezoelectric properties for such free piezoelectric ceramics, poling conditions are often referred. In the present work, effects of the poling electric field on the many properties of Sm doped BCZT ceramic were investigated. The samples were fabricated using a solid-state reaction technique. The XRD analysis indicated that the sample contained a mixture of phases of rhombohedral, tetragonal, and orthorhombic phases with high purity, dense, and large average grain size. A transformation from the symmetric S-E loop for the unpoled sample to an asymmetry loop for the poled sample was observed, while a slight change in the P-E shape was noted. The poling electric field showed a small effect on ɛr and kp values. However, it had large effects on HS, d33, g33, and FoM values. The low HS (9.2%), but high d33 (562 pC/N), g33 (15.55×10−3 Vm/N) and FoM (20.65 pm2/N) values indicated that this ceramic system has potential for piezoelectric and energy harvesting applications.