Enhanced and reliable high-power performance of PMN–PZT-based piezoelectric ceramics

The enhanced and reliable high-power performance of xPb(Mn1/3Nb2/3)O3–(1-x)Pb(Zr0.5Ti0.5)O3–0.5mol%Co2O3 piezoelectric ceramics (xPMN–(1-x)PZT–Co; x = 0.04–0.10) has been achieved. It is noteworthy that the vibration velocity (υ0) of the 0.08PMN–0.92PZT–Co ceramic reaches up to 0.9 m/s, which is 2.25 times that of commercial PZT4 ceramics (∼0.4 m/s). The high υ0 of the 0.08PMN–0.92PZT–Co ceramic is attributed to its excellent electromechanical parameters: d33 = 405 pC/N, Qm = 1405, and kp = 0.61. The 0.08PMN–0.92PZT–Co ceramic achieves a relatively low high-field tan δ (tan δ = 3.74% at 500 V/mm), thereby suppressing heat generation. Additionally, the significantly high Curie temperature (Tc) value of 346 °C for the 0.08PMN–0.92PZT–Co ceramic stabilizes the ferroelectric phase. Therefore, the 0.08PMN–0.92PZT–Co ceramic exhibits long-term reliable high-power performance by maintaining a stable υ0 of 0.9 m/s and slight temperature rise within 100 min.