PZT/P(VDF-TrFE) nanocomposites for ultrasonic hydrophone application

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

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

0-3 composites with nanosized lead zirconate titanate (PZT) powder imbedded in a vinylidene fluoride-trifluoroethylene copolymer (P(VDF-TrFE)) matrix have been fabricated. Since the piezoelectric coefficients of PZT and P(VDF-TrFE) have opposite signs, the PZT and P(VDF-TrFE) phases in the nanocomposites were poled in opposite directions in order to enhance the piezoelectric activity. The PZT powder, prepared by a sol-gel process, has a tetragonal structure. The ratio of the (002) and (200) X-ray diffraction peaks was used as a measure of the degree of poling in the ceramic phase. The piezoelectric coefficient of the nanocomposite film was measured by a laser interferometry technique. A needle type hydrophone for the calibration of medical ultrasonic transducers was fabricated using the nanocomposite as the sensing element and its performance was evaluated.
Original languageEnglish
Title of host publicationProceedings - International Symposium on Electrets
PublisherIEEE
Pages755-758
Number of pages4
ISBN (Print)0780350251
Publication statusPublished - 1 Dec 1999
Event10th International Symposium on Electrets (ISE 10) - Delphi, Greece
Duration: 22 Sep 199924 Sep 1999

Conference

Conference10th International Symposium on Electrets (ISE 10)
Country/TerritoryGreece
CityDelphi
Period22/09/9924/09/99

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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