晶粒尺寸对钙钛矿型压电陶瓷压电性能的影响

Grain size effect on piezoelectric performance in perovskite-based piezoceramics

压电陶瓷能够通过正/逆压电效应实现电能与机械能之间的相互转化,在电子信息、通信、传感等领域中具有广阔的应用前景.压电陶瓷的压电性能对晶粒尺寸极为敏感,其晶粒尺寸效应的研究受到了广泛关注.本文对目前应用较多的几类钙钛矿型压电陶瓷,包括钛酸钡、锆钛酸铅、铌酸钾钠、钛酸铋钠陶瓷的压电性能晶粒尺寸效应的研究与进展进行了综述;总结了这些体系中晶粒尺寸的调控方法,晶粒尺寸效应的表现规律,同时回顾了相关物理模型与理论机制.本文为系统理解压电性能的晶粒尺寸效应提供了指导,并对压电陶瓷晶粒尺寸效应的未来研究方向做出了展望.

Piezoelectric ceramics is a versatile functional material that can realize interconversion between electrical energy and mechanical energy.As the electrical properties of piezoelectric ceramics are extremely sensitive to the grain size variation,the investigation of grain size effect has attracted much attention.In this paper,the recent research progress of the grain size effect on perovskite piezoelectric ceramics,including barium titanate(BT),lead zirconate titanate(PZT),potassium sodium niobate(KNN),and sodium bismuth titanate(BNT),is comprehensively reviewed.We especially focus on topics including feasible ways of fabricating piezoelectric ceramics with the desired grain sizes,the influence of the grain size effect on piezoelectric properties,and the corresponding physical mechanisms.This review would be beneficial to understanding the influence of the grain size effect on piezoelectric properties.The review concludes with the prediction of the further investigation on the grain size effect.