In this work, (Na_0.5Bi_0.5)_0.94Ba_0.06TiO₃ ceramic doped with three lanthanides La³⁺, Gd³⁺, Ho³⁺ were prepared and investigated the corresponding structural, vibrational, ferroelectric and energy storage properties. The X-ray diffraction and Raman spectra reveal a pure perovskite with the coexistence of rhombohedral and tetragonal phases at room temperature for all samples. The thermal dependence of the dielectric constant shows a ferroelectric/antiferroelectric phase transition around T_d, confirmed by the change in the shape of P-E hysteresis loops for all samples. We found that the optimal piezoelectric and ferroelectric properties were obtained in the ceramic doped with Ho³⁺. Furthermore, the later sample revealed relatively remarkable features of energy storage density with temperature, reaching a maximum of 0.63 J/cm³ around 100 °C. The results discussed in this work highlight the great potential of the doped NBT-6BT based lead-free ceramics.

在这项工作中，制备了掺杂有镧系元素La ³⁺，Gd ³⁺，Ho ^3+的（Na _0.5 Bi _0.5）_0.94 Ba _0.06 TiO ₃陶瓷，并研究了其相应的结构，振动，铁电和储能性能。X射线衍射和拉曼光谱显示所有样品在室温下均具有菱形和四方相共存的纯钙钛矿。介电常数的热依赖性表明在T _d附近有铁电/反铁电相变通过所有样品的PE磁滞回线形状的变化来确认。我们发现在掺有Ho ³⁺的陶瓷中获得了最佳的压电和铁电性能。此外，后面的样品显示出储能密度随温度的相对显着特征，在100°C时最高达到0.63 J / cm ³。这项工作中讨论的结果凸显了掺杂NBT-6BT基无铅陶瓷的巨大潜力。