The 0.93(Bi_0.5Na_0.5)TiO₃-0.07BaTiO₃ doped with different amount of (Ga_0.5Ta_0.5)⁴⁺ complex-ion from 0 to 4 mol% (abbreviated as BNBT-100xGT) ceramics were prepared. Phase analysis revealed that up to x = 0.035, Ga³⁺ and Ta⁵⁺ completely dissolve in BNBT perovskite structure and substitute in B-site. Increase in x more than 0.02 resulted in formation of pinched P-E loops accompanied by sharp decrease in P_r. This observation can be attributed to the phase transition from ferroelectric (FE) to a non-polar ergodic relaxor (ER) which could be transformed reversibly to a FE phase by applying an electric field. According to temperature-dependence dielectric constant results, transition temperature from FE to ER phase decreased and for ceramic with x = 0.03 shifted to lower than room temperature with increasing GT content. As a result, enhanced unipolar electric field-induced strain (0.4% under 60 kV/cm) corresponding to d₃₃^* of 667 pm/V was obtained in this ceramic. The large electrostrain is accompanied with relatively large hysteresis, which should be lowered for actuator applications. However (Ga_0.5Ta_0.5)⁴⁺ complex-ion doping of BNT-based ceramics, could be considered as an efficient approach to enhance electrical properties, especially electrostrain characteristic of these ceramics, as competitive alternatives to lead-based ceramics.

制备了0.93(Bi _0.5 Na _0.5 )TiO ₃ -0.07BaTiO ₃掺杂不同量(Ga _0.5 Ta _0.5 ) ⁴⁺配离子0～4mol%（简称BNBT-100 x GT）陶瓷。相分析表明，直至 x = 0.035，Ga ³⁺和 Ta ⁵⁺完全溶解在 BNBT 钙钛矿结构中并取代 B 位。x 增加超过 0.02 导致形成收缩的P - E环，伴随着P _{r 的}急剧下降. 这一观察结果可归因于从铁电体 (FE) 到非极性遍历弛豫 (ER) 的相变，该相变可以通过施加电场可逆地转变为 FE 相。根据温度相关的介电常数结果，随着 GT 含量的增加，从 FE 到 ER 相的转变温度降低，x = 0.03 的陶瓷转变为低于室温。结果，在该陶瓷中获得了对应于667 pm/V 的d ₃₃ ^*的增强的单极电场诱导应变（60 kV/cm 下为 0.4%）。大的电应变伴随着相对较大的滞后，对于执行器应用应该降低滞后。然而 (Ga _0.5 Ta _0.5 ) ⁴⁺ BNT 基陶瓷的络离子掺杂可以被认为是提高电性能的有效方法，特别是这些陶瓷的电应变特性，作为铅基陶瓷的竞争替代品。