Li Zhanmiao, Yi Xingyu, Yang Jikun, Bian Lang, Yu Zhonghui, Dong Shuxiang
School of Materials Science and Engineering, Peking University, Beijing, 100871, China.
Institute for Advanced Study, Shenzhen University, Shenzhen, 518051, China.
Adv Mater. 2022 Jan;34(2):e2107236. doi: 10.1002/adma.202107236. Epub 2021 Oct 24.
Piezoelectric ceramic devices, which utilize multifarious vibration modes to realize electromechanical coupling and energy conversions, are extensively used in high-technological fields. However, the excitation of basic modes is mainly subjected to natural eigenfrequency of ceramic devices, which is related to the structure and material parameters. Herein, inspired by metamaterial theory, a programmable, 3D ordered structure with piezoceramic strain units (3D OSPSU) is developed to artificially generate basic modes in a broad frequency band other than only in narrow eigenfrequency. A (2 × 2 × 2) arrayed, co-fired, multilayer 3D OSPSU is painstakingly designed and fabricated for generating basic modes, such as flexural, extension, shear, torsion, and even coupled modes at nonresonance. To validate the 3D OSPSU method, a five-degree-of-freedom micro-nano actuating platform based on only one co-fired multilayer ceramic is constructed. The proposed methodology provides a new paradigm for creating extraordinary material properties of piezoelectric ceramics and will inspire brand-new piezoelectric device designs.
压电陶瓷器件利用多种振动模式来实现机电耦合和能量转换，广泛应用于高科技领域。然而，基本模式的激发主要受制于陶瓷器件的固有频率，而这与结构和材料参数有关。在此，受超材料理论启发，开发了一种具有压电陶瓷应变单元的可编程三维有序结构（3D OSPSU），以在宽频带内人工产生基本模式，而非仅在狭窄的固有频率范围内。精心设计并制作了一个（2×2×2）阵列的共烧多层3D OSPSU，用于产生基本模式，如弯曲、拉伸、剪切、扭转，甚至非共振时的耦合模式。为验证3D OSPSU方法，构建了一个仅基于一个共烧多层陶瓷的五自由度微纳驱动平台。所提出的方法为创造压电陶瓷的非凡材料特性提供了一种新范式，并将激发全新的压电器件设计。
