PSN-PZN-PZT Quaternary Piezoelectric Ceramics

Pb(Sn1/3Nb2/3)O3-Pb(Zn1/3Nb2/3)O3-PbZrO3-PbTiO3 quaternary piezoelectric ceramics were prepared by conventional solid reaction sintering. The samples were gained by changing the ratio of Zr/Ti and adding MnO2, Sb2O3 and Cr in order to enhance the values of Kp and Qm.The effect of Zr/Ti ratio on the temperature stability of the system was also studied. The results indicate that when calcination temperature is 960℃ and sintering temperature is 1240℃, the comprehensive and excellent materials can be made to fit the request of high power devices such as piezoelectric actuator and ultrasonic motor, and the main parameters are as follows: dielectric constant at room temperature eT33/e0=1669, piezoelectric constant d33=285×10-12C/N, mechanical quality factor Qm=2179, planar coupling coefficient Kp=54.9%, dielectric loss tanδ=0.4%.