Investigación de cerámicas piezoeléctricas a base de PZT dopado con Li₂CO₃ a baja temperatura de sinterización con...

Lead zirconate titanate (PZT) ceramics have been widely investigated due to their excellent electrical properties and thermal stability. However, the sintering temperature of PZT ceramics usually exceeds 1200 °C, where lead elements undergo serious volatilization, leading to a stoichiometric ratio deviation of PZT-based ceramics, thereby deteriorating their electrical properties. In this work, we fabricated Li₂CO₃ (Li)-doped Pb_0.96Sr_0.04(Zr_0.52Ti_0.48)_0.9Mn_0.1O₃ (PSZTMn) ceramics and investigated the influence of doping amount on their characteristics and electrical properties, especially high-power performance. The results showed that the addition of 0.7 wt % Li could decrease the sintering temperature from 1200 to 1050 °C and improve the density of PSZTMn ceramic, resulting in great electrical properties (d₃₃ ∼ 426 pC/N, Q_m ∼ 574, and k_p ∼ 61.5%). Notably, the maximum vibration velocity (v_m) of the low-temperature sintered PSZTMn + 0.7 wt % Li ceramic was significantly increased to 1.9 m/s, which is 19% higher than that of the conventional sintering sample (1.6 m/s). The excellent high-power performance of low-temperature sintering Li₂CO₃ doped PZT ceramics paves the way for their applications in piezoelectric actuators and transducers.