High intensity focused ultrasound array transducers for sonochemistry applications

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

Abstract

High power ultrasound has been employed to catalyze chemical processes for many years. This is typically based on the ability of the system to produce cavitation, through which high temperatures and pressures are released enabling acceleration of chemical reactions. The ultrasonic system used in sonochemistry is traditionally based on a distributed configuration of single frequency transducers. However, these designs can result in complex reactor design and significant power supply demands. In this work, high intensity focused ultrasound (HIFU) is consider as an alternative transduction solution due to its steering and focusing capabilities. Importantly, the steering ability can manipulate the cavitating field within reactor vessel. Three low frequency, high power array transducers have been fabricated, with operating frequencies of 210 kHz, 290 kHz and 420 kHz and each device comprising 16 array elements. Preliminary characterization of these devices, including electrical impedance and surface displacement measurements, correlates well with the predicted performance through PZFlex. A comparison of the ability of each device to generate a cavitating field, at a number of focal positions, was conducted using a hydrophone and conventional aluminum foil experiments.
Original languageEnglish
Title of host publication2011 IEEE International Ultrasonics Symposium
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages2329-2333
Number of pages4
ISBN (Print)9781457712531
DOIs
Publication statusPublished - 2011
EventIEEE International Ultrasonic Symposium 2011 - Florida, United States
Duration: 18 Oct 201121 Oct 2011

Conference

ConferenceIEEE International Ultrasonic Symposium 2011
CountryUnited States
CityFlorida
Period18/10/1121/10/11

Keywords

  • arrays
  • acoustics
  • transducers
  • ultrasonic imaging
  • inductors
  • impedance
  • pressure measurement

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