Nanocomposite ultrasonic hydrophones

H. L.W. Chan, S. T. Lau, Kin Wing Kwok, Q. Q. Zhang, Q. F. Zhou, C. L. Choy

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)


Needle-type hydrophones for the calibration of medical ultrasonic transducers have been fabricated using lead zirconate titanate (PZT)/poly(vinylidene fluoride-trifluoroethylene) (PZT/P(VDF-TrFE)) 0-3 nanocomposite films. The 0-3 nanocomposite film has been prepared by incorporating nanosized PZT powder (derived from a sol-gel process) in a P(VDF-TrFE) matrix. Since the piezoelectric coefficients of PZT and P(VDF-TrFE) have opposite signs, the PZT and P(VDF-TrFE) phases in the nanocomposites have been poled in opposite directions in order to give enhanced piezoelectric activity. A nanocomposite hydrophone with 0.2 volume fraction of PZT has been characterized and found to be more sensitive than a P(VDF-TrFE) hydrophone of similar structure.
Original languageEnglish
Pages (from-to)252-256
Number of pages5
JournalSensors and Actuators, A: Physical
Issue number3
Publication statusPublished - 8 Jun 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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