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Updated: Jun 27, 2026
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Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
Published on: August 5, 2020
Transverse surface waves in a layered structure with a functionally graded piezoelectric substrate and a hard
Zheng-Hua Qian1, Feng Jin, Tianjian Lu
1Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, Shaanxi Province, PR China. qian.z.aa@m.titech.ac.jp
Ultrasonics
|November 28, 2008
Summary
This study investigates transverse surface waves in layered piezoelectric structures. Optimizing the gradient coefficient enhances electromechanical coupling and reduces wave penetration depth, crucial for advanced sensor applications.
Area of Science:
- Solid State Physics
- Materials Science
- Acoustics
Background:
- Functionally graded piezoelectric materials offer tunable properties.
- Layered structures are essential for wave propagation studies.
- Transverse surface waves have applications in sensors and actuators.
Purpose of the Study:
- To analyze the existence and propagation of transverse surface waves.
- To investigate the influence of a gradient coefficient on wave characteristics.
- To explore conditions for high electromechanical coupling and reduced penetration depth.
Main Methods:
- Analytical technique for wave propagation analysis.
- Derivation of dispersion equations for open and short circuit conditions.
- Numerical investigation of gradient coefficient effects.
Main Results:
- Dispersion equations for transverse surface waves were obtained.
- The gradient coefficient significantly impacts the dispersion relation.
- High electromechanical coupling factors were achieved by adjusting the gradient coefficient.
- Penetration depth was reduced to the order of the wavelength.
Conclusions:
- Functionally graded piezoelectric substrates enable control over transverse surface wave properties.
- Tailoring the gradient coefficient is key to optimizing electromechanical coupling and wave confinement.
- The findings are relevant for designing efficient piezoelectric devices and sensors.
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