Title :
Finite-element analysis of 1-3 composite transducers
Author :
Hossack, John A. ; Hayward, Gordon
Author_Institution :
Edward L. Ginzton Lab., Stanford Univ., CA, USA
Abstract :
The vibrational and electromechanical characteristics of a wide range of 1-3 composite structures, comprising ceramic pillars aligned within a polymer phase, are considered using finite-element analysis. The influence of pillar geometry, ceramic volume fraction, and pillar orientation is described in terms of overall transduction efficiency. It is shown that the finite-element method provides a versatile means of analysis and the results obtained permit a set of useful design guidelines to be developed. In general, a small pillar aspect ratio and a relatively high volume fraction provides the most satisfactory performance, in terms of electromechanical efficiency and uniformity of thickness dilation.<>
Keywords :
ceramics; composite materials; piezoelectric materials; piezoelectric transducers; polymers; 1-3 composite transducers; ceramic pillars; ceramic volume fraction; electromechanical characteristics; electromechanical efficiency; finite-element analysis; high volume fraction; pillar geometry; pillar orientation; polymer phase; small pillar aspect ratio; thickness dilation uniformity; transduction efficiency; vibrational characteristics; Biological materials; Biomedical materials; Biomedical transducers; Ceramics; Composite materials; Finite element methods; Frequency; Geometry; Impedance; Shape;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
