The energy-storage properties have been investigated as a function of the temperature and frequency in (Bi_0.5Na_0.5)_0.92Ba_0.08-3x/2La_xTiO₃ lead-free ceramics, where x = 0, 1 and 3 at% La. Room temperature hysteresis loops (P-E curves) have shown a higher stability of the antiferroelectric (AFE) phase for the BNLBT–1 sample, whereas a higher stability of the ferroelectric (FE) phase has been suggested for the compositions with 0 and 3 at% La content; however the thermal evolution of P-E curves reveals a higher stability of the AFE phase with the increase of the temperature, for all compositions. The energy-storage properties revealed a large recoverable energy density (J_R) of approximately 0.45 J/cm³ at room temperature, under an applied electric field of 55 kV/cm, as well as a high energy-storage efficiency (η) of 39%, for the (Bi_0.5Na_0.5)_0.920Ba_0.065La_0.01TiO₃ composition, with a relatively-high stability of J_R for all the analyzed temperature range. Moreover, a sudden increase of both J_R and η parameters was observed with the decrease of the frequency, revealing the maximum values around 0.64 J/cm³ and 60%, respectively, which suggest the studied system to be a promising candidate for applications in energy-storage capacitors.

在（Bi _0.5 Na _0.5）_0.92 Ba _{0.08-3 x / 2} La _x TiO ₃无铅陶瓷中，储能性能随温度和频率的变化进行了研究，其中x =  0、1和3 at％ La。室温磁滞回线（PE曲线）显示BNLBT-1样品的反铁电（AFE）相具有较高的稳定性，而对于0和3的成分，建议的铁电（FE）相具有较高的稳定性至少La含量；然而PE的热演化曲线表明，对于所有组合物，随着温度的升高，AFE相的稳定性更高。储能性能表明，在55 kV / cm的施加电场下，室温下的可回收能量密度（J _R）约为0.45 J / cm ³，并且储能效率（η）高。对于（Bi _0.5 Na _0.5）_0.920 Ba _0.065 La _0.01 TiO ₃组合物为39％，在所有分析的温度范围内，J _R都具有较高的稳定性。而且，两个J _R突然增加随着频率的降低，观察到η和η参数，分别显示出最大值约0.64 J / cm ³和60％，这表明所研究的系统是用于储能电容器的有希望的候选者。