Journal
ADVANCED MATERIALS
Volume 34, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202107236
Keywords
3D ordered structure with piezoceramic actuation units (3D OSPSU); artificial vibration modes; co-fired multilayers; five-degree-of-freedom micro-nanoactuating platforms; tunable piezoelectric coefficients
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Funding
- National Natural Science Foundation of China [51772005, 51072003]
- China 863 Program [2012AA040505]
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Piezoelectric ceramic devices utilize various vibration modes for electromechanical coupling and energy conversion, with the newly developed 3D OSPSU structure artificially generating basic modes across a wide frequency band, providing a new paradigm for piezoelectric device design.
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 x 2 x 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.
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