Study on tangentially polarized composite cylindrical piezoelectric transducer with high electro-mechanical coupling...

Area of Science:

• Piezoelectric Transducer Technology
• Composite Materials Science
• Electromechanical Engineering

Background:

• Traditional piezoelectric transducers often face limitations in electro-mechanical coupling coefficient (EMCC).
• Optimizing transducer design is crucial for enhancing energy conversion efficiency in various applications.

Purpose of the Study:

• To propose and validate an effective fabrication method for a tangentially polarized composite cylindrical transducer.
• To achieve a high electro-mechanical coupling coefficient (EMCC) through a novel composite structure.

Main Methods:

• Theoretical calculation of resonance frequency and EMCC using equivalent circuit models.
• Finite Element Method (FEM) for simulating vibration modes and optimizing parameters.
• Fabrication of prototype transducers with varying metal shell materials and experimental validation using an Impedance Analyzer.

Main Results:

• The tangentially polarized transducer exhibits a significantly higher EMCC than radially polarized designs.
• FEM simulations accurately predicted resonance frequencies, aligning well with experimental measurements.
• Transducer performance, specifically EMCC, is influenced by the outer metal shell material, with aluminum showing the highest EMCC.

Conclusions:

• The proposed tangential polarization method is an effective approach for fabricating high-performance composite cylindrical transducers.
• The developed transducer design offers superior electro-mechanical coupling, making it suitable for advanced applications.
• Material selection for the outer shell, particularly aluminum, plays a critical role in maximizing transducer efficiency.