A lead-free system formulated as (1-x)[0.94Bi_0.5Na_0.5TiO₃-0.06BaTiO₃]-xAgNbO₃ exhibits an electrostrain of 0.50% at 80 kV/cm and a maximum d₃₃^* of 721 pm/V at 60 kV/cm for x=0.3. The incorporation of AgNbO₃ shifts the relaxor-ferroelectric phase transformation temperature (T_F-R) to room temperature and lowers the energy barrier of the field-induced phase transformation. Furthermore, the in-situ electric field dependent high-energy synchrotron X-ray diffraction (SXRD) technique reveals that the sample x=0.03 transforms from dominant P4bm phase to a phase mixture of R3c + P4mm at 55 kV/cm during the electric field loading, and returns to initial dominant P4bm phase at 15 kV/cm during the unloading cycle of the electric field. Furthermore, it can be demonstrated that the electric field induced-phase transition in NBTBT-3AN occurs in the whole sample, rather than in the single direction of electric field. Therefore, the electrocstrain in NBTBT-3AN is more uniform, which would be beneficial to its actuator applications.

配制为（1-x）[0.94Bi _0.5 Na _0.5 TiO ₃ -0.06BaTiO ₃ ] -xAgNbO ₃的无铅系统在80 kV / cm处表现出0.50％的电应变，最大d ₃₃ ^*为721 pm / V在60 kV / cm下，x = 0.3。AgNbO ₃的掺入将弛豫铁电相变温度（T _F-R）移至室温，并降低了场致相变的能垒。此外，原位电场依赖性高能同步加速器X射线衍射（SXRD）技术表明，样品x = 0.03从占优势的P 4 bm转变而来。在电场加载过程中，以55 kV / cm 2的相转变为R 3 c + P 4 mm的相混合物，并在电场的卸载周期中以15 kV / cm的状态恢复到初始的主导P 4 bm相。此外，可以证明，NBTBT-3AN中的电场感应相变发生在整个样品中，而不是在电场的单个方向上发生。因此，NBTBT-3AN中的电应变更加均匀，这将有利于其执行器的应用。