工学院力学与工程科学系李法新课题组在压电材料领域取得突破性进展,他们提出了一种周期正交的极化方法,将目前最常用的PZT压电陶瓷中的非线性畴变应变变得可逆,实现了约0.6%的超大致动应变,是传统PZT压电陶瓷的4倍。压电陶瓷致动器具有响应速度快、位移精度高、控制方便(电控)、体积小等优势,一直在致动器领域占据着主导地位。目前应用的压电致动器主要由锆钛酸铅(PZT)陶瓷制 Department of Mechanics and Engineering, Faculty of Engineering, Department of Mechanics and Engineering Li Faxin’s group made a breakthrough in the field of piezoelectric materials. They proposed a method of polarization orthogonal to each other. The most commonly used PZT piezoelectric ceramics, Reversible, to achieve about 0.6% of the large dynamic strain, is 4 times the traditional PZT piezoelectric ceramics. Piezoelectric ceramic actuator has the advantages of fast response, high displacement accuracy, easy control (electronic control), small size and other advantages, has been in the field of actuators dominated. Piezoelectric actuators currently used are mainly made of lead zirconate titanate (PZT) ceramics