The (1−x)(0.8Bi_1/2Na_1/2TiO₃–0.2Bi_1/2K_1/2TiO₃)−xBiMg_2/3Nb_1/3O₃ (100xBMN) ternary solid solutions were designed and prepared using a conventional solid‐state reaction. Temperature and compositional dependent ferroelectric, piezoelectric, dielectric features, and structural evolution were systematically studied. At the critical composition of 2BMN, a large bipolar strain of 0.43% was achieved at 55 kV/cm, and the normalized strain reaches to 862 pm/V at a low driving electric field of 40 kV/cm. It was found that the substitution of BiMg_2/3Nb_1/3O₃ induces a transformation from ferroelectric to relaxor phase by disrupting the long range ferroelectric order. Therefore, as the external electric field was applied, a relaxor‐ferroelectric phase transition will be induced. This is contributed to the giant strain. The results above suggest that such a ternary composition is a promising candidate for application to actuator.

中文翻译：

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Bi1 / 2Na1 / 2TiO3–Bi1 / 2K1 / 2TiO3–Bi（Mg2 / 3Nb1 / 3）O3陶瓷的大应变响应和低驱动场

（1- x）（0.8Bi _1/2 Na _1/2 TiO ₃ –0.2Bi _1/2 K _1/2 TiO ₃）-x BiMg _2/3 Nb _1/3 O ₃（100 xBMN）三元固溶体是使用常规固相反应设计和制备的。系统地研究了温度和成分相关的铁电，压电，介电特性和结构演变。在2BMN的临界组成下，在55 kV / cm时实现了0.43％的大双极应变，在40 kV / cm的低驱动电场下，归一化应变达到862 pm / V。发现BiMg _2/3 Nb _1/3 O ₃的取代通过破坏长距离铁电有序，从而引起从铁电到弛豫相的转变。因此，当施加外部电场时，将引发弛豫铁电相变。这造成了巨大的压力。以上结果表明，这种三元组成是应用于致动器的有希望的候选者。