This study investigated the effects of CaTiO₃, BaTiO₃, and BaZrO₃ doping on the phase transition and strain properties of lead-free 0.76Bi_1/2Na_1/2TiO₃-0.24SrTiO₃ (BNT-24ST) piezoceramics. The nonergodicity of the BNT-24ST ceramic was stabilized as a function of CaTiO₃ doping, corresponding to the existence of the ferroelectric-to-relaxor phase transition temperature (T_F-R) peak in the dielectric permittivity curves of the samples. However, the BaTiO₃- or BaZrO₃- doped NBT-24ST samples promote the transition from a nonergodic to an ergodic relaxor phase. The 0.01 mol BaTiO₃ or 0.01 mol BaZrO₃ doping decreases the T_F-R peak of the NBT-24ST sample to below room temperature. Interestingly, it is noted that the nonergodic-to-ergodic relaxor phase transition of the BaTiO₃-doped BNT-24ST ceramics was faster than that of the BaZrO₃-doped BNT-24ST ceramics. The 0.01 mol BaTiO₃-doped BNT-24ST sample presents a maximum dielectric constant of ~ 8000. The maximum piezoelectric actuator coefficient (uni-S_max/E_max) of ~ 525 pm/V was observed for the 0.01 mol BaTiO₃-doped BNT-24ST ceramic. The effect of the tolerance factor on the phase transition and electrical properties of the BNT-24ST-ABO₃ ceramics is suggested.

_{本研究研究了CaTiO 3}、BaTiO ₃和BaZrO ₃掺杂对无铅0.76Bi _1/2 Na _1/2 TiO ₃ -0.24SrTiO ₃ (BNT-24ST)压电陶瓷的相变和应变性能的影响。_{BNT-24ST陶瓷的非遍历性作为CaTiO 3}掺杂的函数而稳定，对应于样品介电常数曲线中铁电到弛豫相变温度(T _{F-R )峰的存在。}然而，BaTiO ₃ -或BaZrO ₃- 掺杂NBT-24ST样品促进从非遍历到遍历弛豫相的转变。0.01 mol BaTiO ₃或0.01 mol BaZrO ₃掺杂将NBT-24ST样品的TF _-R峰降低至室温以下。_{有趣的是，值得注意的是，BaTiO 3}掺杂的BNT-24ST陶瓷的非遍历到遍历弛豫相变比BaZrO ₃掺杂的BNT-24ST陶瓷的相变更快。0.01 mol BaTiO ₃掺杂的 BNT-24ST 样品的最大介电常数约为 8000。对于 0.01 mol BaTiO 观察到的最大压电致动器系数 (uni- S _max / E _{max ) 约为 525 pm/V3-}掺杂BNT-24ST陶瓷。提出了容差因子对 BNT-24ST- AB O ₃陶瓷的相变和电性能的影响。