压电器件用KNN基无铅压电陶瓷的研究进展

(K, Na)NbO₃(KNN)基无铅压电陶瓷作为一种环境友好型材料，兼具较高的居里温度和可调控的相界结构，在压电器件领域展示出潜在的应用前景，引起了广泛关注和大量研究。对其物相组成、制备工艺、性能调控等方面的研究进展进行了评述，并重点介绍了其在压电器件领域的实际应用，最后对KNN及其在器件应用方面未来的研究和发展方向进行了总结展望。

Research Progress of KNN-Based Lead-Free Piezoelectric Ceramics for Piezoelectric Devices

As an environmentally friendly piezoelectric material, the (K,Na)NbO₃-based (KNN) lead-free piezoelectric ceramics with a high Curie temperature and a tunable phase boundary structure show potential application prospects in the piezoelectric devices and have attracted extensive attention lots of research interesting. In this work, the research progress of KNN-based materials was reviewed from the aspects of phase composition, preparation process and performance control. Especially, its practical application in the field of piezoelectric devices was systematically introduced. Finally, the future research and development direction of KNN and its application in device were summarized and prospected.