High intensity focused ultrasound array transducers using 2-2 stacked piezoelectric composite appropriate for sonochemistry application

Chuangnan Wang, Anthony Gachagan, Richard O'Leary, John MacKersie

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

High power ultrasound can be used as a catalysis to enhance the efficiency of chemical reactions. The generation of cavitation accelerates the reaction. The ultrasonic system in sonochemistry is typically based on single-frequency transducers, with some reactor designs incorporating multiple transducers operating at different frequencies. Currently, high intensity focused ultrasound (HIFU) is mainly used in clinical applications, such as prostate cancer surgery - high frequency ultrasound is utilized to provide accurate focusing and prevent cavitation. This paper considers the application of the HIFU technique in sonochemistry, in which an array transducer is used to generate cavitation through its steering ability. In this paper, the HIFU array transducer is based on a stacked, 2-2 connectivity piezoelectric composite and is configured as a 1-D linear array. As the goal is to produce cavitation in a liquid load, the operating frequency is below 500kHz. A 2-layer stacked structure, without backing, is adopted to increase the thickness of composite and reduce frequency. Due to the high acoustic impedance of the piezoceramic composite, a two matching layer system is applied to improve the coupling efficiency. The prototype array has been calibrated through experimental measurements of acoustic pressure field, impulse response and cavitating field.
Original languageEnglish
Title of host publication2012 IEEE International Ultrasonics Symposium (IUS) Proceedings
Place of PublicationPiscataway, N.J.
PublisherIEEE
Pages2497-2500
Number of pages4
ISBN (Print)9781467345613
DOIs
Publication statusPublished - 2012
Event2012 IEEE International Ultrasonics Symposium (IUS) - Dresden, Germany
Duration: 7 Oct 201210 Oct 2012

Conference

Conference2012 IEEE International Ultrasonics Symposium (IUS)
CountryGermany
CityDresden
Period7/10/1210/10/12

Keywords

  • ultrasonic array
  • HIFU
  • cavitation
  • sonochemistry
  • 2-2 piezoelectric composite
  • transducers
  • ultrasonic imaging
  • acoustics
  • arrays
  • focusing
  • impedance
  • inductors

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  • Cite this

    Wang, C., Gachagan, A., O'Leary, R., & MacKersie, J. (2012). High intensity focused ultrasound array transducers using 2-2 stacked piezoelectric composite appropriate for sonochemistry application. In 2012 IEEE International Ultrasonics Symposium (IUS) Proceedings (pp. 2497-2500). Piscataway, N.J.: IEEE. https://doi.org/10.1109/ULTSYM.2012.0625