Electrical and Mechanical Properties of Ternary Solid Solution System PbZrO₃-PbTiO₃-Pb(Mn_1/3Sb_2/3)O₃ Piezoelectric Ceramics

Abstract

The pseudo-ternary solid solution system PbZrO₃-PbTiO₃-Pb(Mn_1/3Sb_2/3)O₃(PZ-PT-PMS) piezoelectric ceramics were synthesized. However, the value of tolerance factor with Pb(Mn_1/3Sb_2/3)O₃ was nearly 1, Pb(Mn_1/3Sb_2/3)O₃ does not exist itself as a single phase perovskite structure. Pb₂Sb₂O₇ and Pb₂MnO₄ coexisted. But the small amount of PMS added PZ-PT-PMS showed a single phase perovskite structure. The piezoelectric properties were significantly changed near morphotropic phase boundary (MPB). Small amount of Mn₂O₃ addition to PZ-PT-PMS improved electromechanical coupling factor (kp) and mechanical quality factor (Qm). The four point bending strength of PZ-PT-PMS was 81.7MPa. And the value of Weibull modulus was 9.0.