1-3 Piezoelectric Composite Ferroelectric Materials in Smart Medical Ultrasonic Diagnostic Transducers

Abstract

Piezoelectric ultrasonic transducer is the most important functional device in the field of ultrasound, as an important part of piezoelectric ultrasonic transducer-piezoelectric material, the improvement of its performance plays an important role in promoting the innovation and development of piezoelectric ultrasonic transducers. This article aims to conduct a finite element study based on the 1-3 piezoelectric composite ferroelectric material of the smart medical ultrasonic diagnostic transducer. In this article, the working principle and function of the ultrasonic transducer are explained first. The ultrasonic transducer is classified, and the FEM analysis of the 1-3 piezoelectric composite ferroelectric material and the ANSYS FEM analysis method are introduced. The influence of PZT volume fraction, aspect ratio and the number of primitives on the finite element model of the 1-3 spherical-crown piezoelectric composite is mainly discussed, and then verified by experiments and ANSYS performance analysis of ultrasonic diagnostic transducers. The research results show that the thickness electromechanical coupling factor of the 1-3 piezoelectric composite material is affected by the thickness electromechanical coupling coefficient of the piezoelectric phase material, the volume fraction of the piezoelectric phase, and the width-to-thickness ratio. When the aspect ratio is increased to 0.7, the electromechanical coupling coefficient of the thickness with a volume fraction of 80% is reduced by 79%.The electromechanical coupling coefficient of the thickness with a volume fraction of 60% is reduced by 73%, and the electromechanical coupling coefficient of the thickness with a volume fraction of 20% is reduced by 68%.