In this review, the evolution of high strain Na_0.5Bi_0.5TiO₃-based lead-free piezoceramics and their multilayer actuators has been explored. First, in terms of Na_0.5Bi_0.5TiO₃-based ceramic materials, the origin of high strain, the typical chemical modification methods of obtaining large strain and extrinsic factors affecting the large strain are discussed. Then it briefly summarizes the problems existing in Na_0.5Bi_0.5TiO₃-based ceramics for multilayer actuator applications. Strategies to optimize strain performance by means of microstructure control and phase structure design are also discussed. Thereafter, in terms of multilayer actuator, we describe its characteristics, applications and preparation process systematically, as well as the recent development of Na_0.5Bi_0.5TiO₃-based multilayer actuator. At last, perspectives on directions of following work and promising fields for the applications of the materials and their devices are presented.

在这篇综述中，已经探索了高应变Na _0.5 Bi _0.5 TiO ₃基无铅压电陶瓷及其多层致动器的发展。首先，针对Na _0.5 Bi _0.5 TiO ₃基陶瓷材料的高应变起源，讨论了获得大应变的典型化学修饰方法以及影响大应变的外在因素。然后简要总结了Na _0.5 Bi _0.5 TiO _3中存在的问题基陶瓷，用于多层执行器应用。还讨论了通过微结构控制和相结构设计来优化应变性能的策略。此后，就多层致动器的特点，应用和制备过程进行了系统的描述，以及基于Na _0.5 Bi _0.5 TiO ₃的多层致动器的最新发展。最后，介绍了有关材料及其器件应用的后续工作方向和有希望的领域的观点。