Effects of CeO_2 doping on the structure and properties of PSN-PZN-PMS-PZT piezoelectric ceramics

摘要

Quinary system piezoelectric ceramics PSN-PZN-PMS-PZT were prepared by using a two-step method. The effects of CeO_2 doping on piezoelectric and dielectric properties of the system were investigated at morphotropic phase boundary (MPB). The results reveal that the relative dielectric constant epsilon~T_(33)/epsion_0 . the Curie temperature T_c, the piezoelectric constant d_(33), the mechanical quality factor Q_m, and the electromechanical coupling coefficient K_p are changed with the increase of CeO_2 content. On the other hand, the effects of CeO_2 doping on the dielectric properties of PSN-PZN-PMS-PZT piezoelectric ceramics at high electric field are consistent with the change at weak electric field. The values of dielectric constant and dielectric loss are enhanced with the increasing of electric field.