In this work, the relationship between the structural mechanisms and macroscopic electrical properties of the Nb-modified 0.96(Bi_0.5Na_0.84K_0.16TiO₃)–0.04SrTiO₃ (BNKT–ST) system were elucidated by using temperature dependent and in situ synchrotron X-ray diffraction (XRD) techniques. For the composition x = 0.0175, a large-signal piezoelectric coefficient (S_max/E_max = d₃₃*) of 735 pm V⁻¹ at 6 kV mm⁻¹ was observed at room temperature. Interestingly, at a higher temperature of 110 °C, the sample still showed a large d₃₃* of 570 pm V⁻¹. Furthermore, the temperature-invariant electrostrictive coefficient for this sample was found to be 0.0285 m⁴ C⁻² over the temperature range of 25–170 °C. Moreover, the energy density for x = 0.030 sample was ∼1.0 J cm⁻³ with an energy storage efficiency of ˃70% in the temperature range of 25–135 °C. These results suggest that the synthesized Nb-modified BNKT–ST system is promising for the design of ceramic actuators as well as capacitor applications.

在这项工作中，通过使用温度依赖性和原位同步加速器阐明了Nb改性的0.96（Bi _0.5 Na _0.84 K _0.16 TiO ₃）–0.04SrTiO ₃（BNKT–ST）体系的结构机理与宏观电学性质之间的关系。X射线衍射（XRD）技术。用于组合物X  = 0.0175，大信号的压电系数（小号_最大值/ é_最大 =  d ₃₃ 735时的V *）^-1在6千伏毫米^-1在室温下观察到。有趣的是，在110°C的较高温度下，样品的d ₃₃ *仍然很大，为570 pm V ^-1。此外，在25–170°C的温度范围内，该样品的温度不变电致伸缩系数为0.0285 m ⁴  C ^-2。此外，x  = 0.030样品的能量密度为〜1.0 J cm ^-3，在25–135°C的温度范围内，能量存储效率为˃70％。这些结果表明，合成的Nb修饰的BNKT–ST系统对于陶瓷执行器以及电容器应用的设计是有前途的。