A-site substituted 0.88(Bi_0.5Na_0.5)_1−x(Li_0.5Nd_0.5)_xTiO₃–0.12BaTiO₃ (BNTLNx–BT12) ceramics were synthesized using a conventional solid-state reaction route. The structural transformation and miscellaneous electrical properties were systematically investigated. The A-site modification induced two sequence transitions from ferroelectric tetragonal (T) to quasi-ferroelectric pseudocubic (PC) phase, followed closely by the second transition from non-ergodic to ergodic relaxor (NR-ER), and finally to dynamic polar nanoregions (PNRs). The significant enhancement in piezoelectric activity, strain response, broad plateau-like maximum dielectric permittivity over a large temperature range and energy-storage level at different compositions may be attributed to the compositionally-induced T-PC to NR-ER transition and the alignment of dynamically-fluctuating PNRs, respectively. The evolution of multifunctional electrical properties, associated with the variations in structure/microstructure, might provide a new insight to investigate the underlying mechanism of structure-electrical properties relationship in ferroelectric solid solutions.

中文翻译：

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Bi0.5Na0.5TiO3基陶瓷中的铁电-准铁电-遍历弛豫转变和多功能电性能

使用常规固态反应路线合成了A位取代的0.88（Bi _0.5 Na _0.5）_{1- x}（Li _0.5 Nd _0.5）_x TiO ₃ -0.12BaTiO ₃（BNTLN x -BT12）陶瓷。系统地研究了结构转变和其他电性能。A位修饰导致从铁电四方（T）到准铁电伪立方（PC）的两个序列过渡阶段），紧接着是第二次从非遍历到遍历舒张器（NR-ER）的过渡，最后是动态极性纳米区域（PNRs）的过渡。压电活性，应变响应，大温度范围内宽平台样的最大介电常数和不同组成下的储能水平的显着提高可能归因于组成诱导的T - PC向NR-ER的跃迁和N的排列动态波动的PNR。多功能电学性质的演变与结构/微结构的变化有关，可能为研究铁电固溶体中结构-电学性质关系的潜在机理提供新的见解。