Design, fabrication, and evaluation of high frequency, single-element transducers incorporating different materials

Kevin A. Snook, Jian Zhong Zhao, Carlos H.F. Alves, Jonathan M. Cannata, Wo Hsing Chen, Richard Joseph Meyer, Jr., Timothy A. Ritter, K. Kirk Shung

Research output: Contribution to journalArticle

95 Scopus citations

Abstract

The performance of high frequency, single-element transducers depends greatly on the mechanical and electrical properties of the piezoelectric materials used. This study compares the design and performance of transducers incorporating different materials. The materials investigated include 1-3 lead zirconate titanate (PZT) fiber composite, lead titanate (PbTiO3) ceramic, poly(vinylidene fluoride) (PVDF) film, and lithium niobate (LiNbO3) single crystal. All transducers were constructed with a 3-mm aperture size and an f-number between 2 and 3. Backing and matching materials were selected based on design goals and fabrication limitations. A simplified coaxial cable tuning method was employed to match the transducer impedance to 50 Ω for the PZT fiber composite and PbTiO3 ceramic transducers. Transducers were tested for two-way loss and -6 dB bandwidth using the pulse/echo response from a flat quartz target. Two-way loss varied from 21 to 46 dB, and bandwidths measured were in the range from 47 to 118%. In vitro ultrasonic backscatter microscope (UBM) images of an excised human eye were obtained for each device and used to compare imaging performance. Both press-focusing and application of a lens proved to be useful beam focusing methods for high frequency. Under equal gain schemes, the LiNbO3 and PbTiO3 transducers provided better image contrast than the other materials.

Original languageEnglish (US)
Pages (from-to)169-176
Number of pages8
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Volume49
Issue number2
DOIs
StatePublished - Feb 1 2002

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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