Modeling and simulation of micro size ultrasonic characteristics of lead zirconate titanate and polyvinylidene fluoride

Abstract

This study was focused on modeling and simulation of micro size ultrasonic generator and receiver of polyvinylidene fluoride (PVDF) and lead zirconate titanate (PZT) using finite element analysis (FEA). When PZT-5 H was selected as both ultrasonic generator and receiver, the resonance frequency of the generator and receiver were determined as 15 MHz and 13 MHz respectively and the simulation was performed at 13 MHz frequency to generate ultrasonic wave. In addition to that, when PVDF was utilized as the receiver material its resonance frequency was determined as 10 MHz and therefore simulation was performed at 10 MHz. The resonance frequency remains the same (5 MHz) When PVDF was selected as an ultrasonic generator with whatever receiver materials (PVDF and PZT-5H) used. Then the generated ultrasonic wave was directed to hit the ultrasonic receiver to generate electric potential. To compare and validate the induced voltage across the receiver mathematical equation was derived using piezoelectric constitutive equations. When PVDF worked as receiver it generated higher voltage value than PZT-5H. On the other hand, when PZT-5H worked as an ultrasonic generator, it induced higher voltage across the receiver.