High-field dielectric properties and high-power performance of Fe-modified PZN–PMS–PZT piezoelectric ceramics.

In this work, the 0.04Pb(Zn_1/3Nb_2/3)O₃-0.05Pb(Mn_1/3Sb_2/3)O₃–xPbZrO₃–(0.91−x)PbTiO₃ + ymol%Fe₂O₃ (xPZ-PZNMST + y%Fe; x = 0.440–0.460, y = 0.00–0.15) piezoelectric ceramics were synthesized by solid-state reaction method. The 0.45PZ-PZNMST + 0.10%Fe ceramic with morphotropic phase boundary shows optimum comprehensive electromechanical properties with d₃₃ = 401 pC/N, k_p=0.6, tan δ = 0.39%, Q_m=921, and Tc = 314 °C. In addition, a low high-field tanδ of 0.78% at 200 V/mm is achieved in the 0.45PZ-PZNMST + 0.10%Fe ceramic. Therefore, a high vibration velocity of 0.80 m/s is obtained in 0.45PZ-PZNMST + 0.10%Fe ceramic. The maximum mechanical energy density of 0.45PZ-PZNMST + 0.10%Fe ceramic reaches 2500 J/m³, which is about four times that of commercial PZT4 ceramics (620 J/m³). The 0.45PZ-PZNMST + 0.10%Fe ceramic with good high-power performance shows a potential application in high-power ultrasonic transducers. [ABSTRACT FROM AUTHOR]