Abstract This study investigated the microstructure, dielectric, ferroelectric, and strain properties of lead‒free 0.995Bi 1/2 (Na 0.82 K 0.18 ) 1/2 TiO 3 –0.005BaZrO 3 /0.98Bi 1/2 (Na 0.78 K 0.22 ) 1/2 TiO 3 –0.02LaFeO 3 (BNKT18BZ/BNKT22LF) ceramic composites. We found that the required electric field for trigging the phase transition from ergodic relaxor (ER) to ferroelectric of BNKT18BZ/BNKT22LF ceramic composites can be effectively decreased by adding BNKT18BZ as nonergodic relaxor (NER) with changes of three different stabilized regions and the highest S usable peak points as a function of the applied electric field. The highest d 33 * value of 690 p.m./V was obtained at 4 kV/mm for 0.3 wt BNKT18BZ fraction ceramic composites. This value was higher than 575 p.m./V of BNKT22LF ceramics under an applied electric field of 5 kV/mm.

中文翻译：

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添加非遍历弛豫剂降低无铅双基陶瓷复合材料的可逆相变场

摘要 本研究研究了无铅 0.995Bi 1/2 (Na 0.82 K 0.18 ) 1/2 TiO 3 –0.005BaZrO 3 /0.98Bi 1/2 (Na 0.78 K 0.22 ) 的微观结构、介电、铁电和应变性能。 1/2 TiO 3 –0.02LaFeO 3 (BNKT18BZ/BNKT22LF)陶瓷复合材料。我们发现，通过添加 BNKT18BZ 作为非遍历弛豫 (NER) 并改变三个不同的稳定区域和最高的 S，可以有效降低触发 BNKT18BZ/BNKT22LF 陶瓷复合材料从遍历弛豫 (ER) 到铁电体的相变所需的电场可用峰值点作为外加电场的函数。对于 0.3 wt BNKT18BZ 分数陶瓷复合材料，在 4 kV/mm 下获得了 690 pm/V 的最高 d 33 * 值。在 5 kV/mm 的外加电场下，该值高于 BNKT22LF 陶瓷的 575 pm/V。