Resonance analysis of a high temperature piezoelectric disc for sensitivity characterization

Abstract

Ultrasonic transducers for high temperature (200 °C+) applications are a key enabling technology for advanced nuclear power systems and in a range of chemical and petro-chemical industries. Design, fabrication and optimization of such transducers using piezoelectric materials remains a challenge. In this work, experimental data-based analysis is performed to investigate the fundamental causal factors for the resonance characteristics of a piezoelectric disc at elevated temperatures. The effect of all ten temperature-dependent piezoelectric constants (ε, ε, d, d, d, s, s, s, s, s) is studied numerically on both the radial and thickness mode resonances of a piezoelectric disc. A sensitivity index is defined to quantify the effect of each of the temperature-dependent coefficients on the resonance modes of the modified lead zirconium titanate disc. The temperature dependence of s showed highest sensitivity towards the thickness resonance mode followed by ε, s, s, s, d, d, s, ε, and d in the decreasing order of the sensitivity index. For radial resonance modes, the temperature dependence of ε showed highest sensitivity index followed by s, s and d coefficient. This numerical study demonstrates that the magnitude of d is not the sole factor that affects the resonance characteristics of the piezoelectric disc at high temperatures. It appears that there exists a complex interplay between various temperature dependent piezoelectric coefficients that causes reduction in the thickness mode resonance frequencies which is found to be agreement in with the experimental data at an elevated temperature.

An Input-Current Shaping and Soft-Switching Drive Circuit Applied to a Piezoelectric Ceramic Actuator

“…When an electric field is applied on the surface of the piezoelectric material, the electric dipole moment will be elongated due to the action of the electric field, and the piezoelectric material will elongate along the direction of the electric field in order to resist the change. This process of generating mechanical deformation through the action of an electric field is called the "inverse piezoelectric effect" [1][2][3][4][5][6].…”

Recent Advances in Piezoelectric Wafer Active Sensors for Structural Health Monitoring Applications

“…In recent years, many researchers have explored the capability of PWAS for SHM applications, such as the characterization of PWAS [9,10,11,12,13], impact localization [14,15,16,17,18,19], acoustic emission (AE) detection [20,21], and damage detection in isotropic and composite plates [22,23,24,25,26,27]. These studies facilitate the understanding of PWAS-based SHM applications.…”

“…It was concluded that the changes in anti-resonance and resonance frequencies have a linear relationship with temperature. In addition, the sensitivity characterization of high temperature piezoelectric transducers was performed by using resonance analysis [11]. Sinclair and Chertov [12] presented a comprehensive literature study of the radiation endurance of a piezoelectric transducer.…”