Designing Artificial Vibration Modes of Piezoelectric Devices Using Programmable, 3D Ordered Structure with...

Area of Science:

• Materials Science
• Mechanical Engineering
• Electrical Engineering

Background:

• Piezoelectric ceramic devices are crucial for electromechanical coupling and energy conversion in high-tech applications.
• Excitation of basic vibration modes in these devices is typically limited by their natural eigenfrequency, which depends on structural and material properties.

Purpose of the Study:

• To develop a novel piezoelectric ceramic structure capable of generating basic vibration modes artificially across a broad frequency band.
• To overcome the limitations of natural eigenfrequency-based mode excitation in piezoelectric devices.

Main Methods:

• Inspired by metamaterial theory, a programmable, 3D ordered structure with piezoceramic strain units (3D OSPSU) was designed and fabricated.
• A (2 × 2 × 2) arrayed, co-fired, multilayer 3D OSPSU was engineered to generate various modes (flexural, extension, shear, torsion, coupled) at non-resonant frequencies.

Main Results:

• The 3D OSPSU successfully generated multiple basic vibration modes, including coupled modes, at non-resonant frequencies.
• A five-degree-of-freedom micro-nano actuating platform was constructed using a single co-fired multilayer ceramic based on the 3D OSPSU method.
• Demonstrated artificial generation of vibration modes in a broad frequency band, deviating from narrow eigenfrequency limitations.

Conclusions:

• The proposed 3D OSPSU methodology offers a new approach to engineer piezoelectric ceramic properties.
• This work presents a novel paradigm for designing advanced piezoelectric devices with enhanced functionalities.
• The findings pave the way for innovative piezoelectric device designs with programmable vibration modes.