Lattice Structure and Piezoelectric Properties of Pb(Mn1/3Nb2/3)O3-Pb(Zn1/3Nb2/3)O3- Pb(Zr0.52Ti0.48)O3 Ceramics

摘要

Pb(Mn1/3Nb2/3)O3-Pb(Zn1/3Nb2/3)O3-Pb(Zr0.52Ti0.48)O3(designated as PMN-PZN-^sPZT) quaternary piezoelectric ceramics were prepared by the solid-state reaction. The effect of PMN content on the lattice structure and electrical properties were investigated. The results show that the pure perovskite phase form in ceramics. The lattice structure changed from tetragonal to rhombohedral and the lattice constant decreases with increasing PMN content. It was found that ε, d33 and Curie temperature Tc decreased while Qm increased with the increase of PMN content. The composition with 7.5mol% PMN on PMN-PZN-PZT ceramics has the excellent piezoelectric properties, the dielectric constantεis 842, piezoelectric constant d33 is 225pC/N, electromechanical factor Kp is 0.57 with the high mechanical quality factor Qm amounted to 1156, which can meet the needs of high power piezoelectric smart devices.