Relaxor ferroelectric 0.94Na_0.5Bi_0.5TiO₃‐0.06BaTiO₃‐modified antiferroelectric Pb_0.99Nb_0.02[(Zr_0.57Sn_0.43)_0.94Ti_0.06]_0.98O₃ ceramics, (1−x )PNZST‐x (BNT‐6BT), were prepared to acquire high energy storage and thermal stability properties. X‐ray diffraction and element mapping revealed that a solid solution between PNZST and BNT‐6BT occurs, and Ti cations enter the PNZST lattice, partly extruding Sn cations and leading to the formation of isolated SnO₂ particles at the grain boundaries and a 0‐3 type composite structure. Such a composite structure helps to create deviatoric stress in the solid solution component. The BNT‐6BT content significantly influences the energy storage capacity, and the x  = 0.2 composition renders optimal performance. The room‐temperature‐recoverable energy density and energy efficiency are 2.23 J/cm³ and 78%, respectively, at 260 kV/cm. Both parameters vary less than 6% within a temperature range of 25°C and 125°C. The improved energy storage and temperature stability indicate that the ceramics can potentially be applied in pulse power capacitors and that this relaxor‐modified antiferroelectric ceramic preparation method is a valuable reference for further optimizing the functional properties.

中文翻译：

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BNT-6BT改性反铁电PNZST陶瓷的热稳定储能性能

弛豫铁电0.94Na _0.5 Bi _0.5 TiO ₃ -0.06BaTiO ₃改性的反铁电Pb _0.99 Nb _0.02 [（Zr _0.57 Sn _0.43）_0.94 Ti _0.06 ] _0.98 O ₃陶瓷，（1- x）PNZST- x（BNT- 6BT ），准备获得高能量存储和热稳定性能。X射线衍射和元素图谱显示，PNZST和BNT-6BT之间发生固溶，Ti阳离子进入PNZST晶格，部分挤出Sn阳离子并导致形成孤立的SnO _2。晶界处的颗粒和0-3型复合结构。这种复合结构有助于在固溶体组分中产生偏应力。BNT-6BT含量会显着影响储能能力，x  = 0.2的成分可提供最佳性能。在260 kV / cm时，室温可恢复的能量密度和能效分别为2.23 J / cm ³和78％。在25°C和125°C的温度范围内，两个参数的变化均小于6％。改进的能量存储和温度稳定性表明，该陶瓷可以潜在地用于脉冲功率电容器中，并且这种经松弛改性的反铁电陶瓷制备方法为进一步优化功能特性提供了宝贵的参考。