NaBiTiO(NBT)-based ceramics are materials with good energy storage properties and non-ergodic relaxation ferroelectric properties, as well as high Curie temperature and good temperature stability. Herein, a new approach was devised to adjust the non-ergodic relaxation ferroelectric characteristics of NaBiTiO(NBT)-based ceramics by introducing NaNbO into NaBiTiO(NBT) (x NN-(1-x) NBT, where x= 0.17, 0.19, 0.21, 0.23, and 0.25). To overcome limitations of NBT, additional constituents with antiferroelectric properties were introduced to create binary solid solutions with NBT to yield NN-NBT ceramics with antiferroelectric properties for optimized energy storage applications. As-obtained NN-NBT ceramics revealed multiphase structures with rhombic (R3c) and tetrahedral (P4bm) phases. Coexisting strongly and weakly coupled polar nanoregions (PNRs) resulted in relatively high polarization () and reduced polarization of reflection (). The optimized 0.21NN-0.79NBT ceramic exhibited recoverable energy storage density of ≈2.84 J·cm at 180 kv·cm with energy storage efficiency of 78%. Structural characterization indicated the existence of intermediate phases modulation phases with coexisting antiferroelectric phase and relaxation ferroelectric phase. Overall, proposed NBT-based non-ergodic relaxation ferroelectric ceramics look promising for effectively improving energy storage performance, providing new prospects for the development of advanced pulse capacitors.

中文翻译：

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通过成分改性提高NN-NBT陶瓷的储能性能

NaBiTiO(NBT)基陶瓷是一种具有良好储能性能和非遍历弛豫铁电性能，以及高居里温度和良好温度稳定性的材料。在此，设计了一种新方法，通过将NaNbO引入到NaBiTiO(NBT)基陶瓷中来调节NaBiTiO(NBT)基陶瓷的非遍历弛豫铁电特性(x NN-(1-x) NBT，其中x= 0.17, 0.19， 0.21、0.23 和 0.25）。为了克服NBT的局限性，引入了具有反铁电特性的其他成分，以与NBT创建二元固溶体，从而产生具有反铁电特性的NN-NBT陶瓷，以优化储能应用。所获得的 NN-NBT 陶瓷显示出具有菱形 (R3c) 和四面体 (P4bm) 相的多相结构。共存的强耦合和弱耦合极性纳米区域 (PNR) 导致相对较高的偏振 () 和反射偏振 () 的降低。优化后的0.21NN-0.79NBT陶瓷在180 kv·cm下的可恢复储能密度约为2.84 J·cm，储能效率为78%。结构表征表明存在中间相调制相，同时存在反铁电相和弛豫铁电相。总体而言，基于NBT的非遍历弛豫铁电陶瓷有望有效提高储能性能，为先进脉冲电容器的发展提供新前景。