Nanocomposite ultrasonic hydrophones

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

doi:10.1016/S0924-4247(99)00076-X

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 publication › Journal article › Academic research › peer-review

29 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	252-256
Number of pages	5
Journal	Sensors and Actuators, A: Physical
Volume	75
Issue number	3
DOIs	https://doi.org/10.1016/S0924-4247(99)00076-X
Publication status	Published - 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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10.1016/S0924-4247(99)00076-X

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abstract = "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.",

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AU - Lau, S. T.

AU - Kwok, Kin Wing

AU - Zhang, Q. Q.

AU - Zhou, Q. F.

AU - Choy, C. L.

PY - 1999/6/8

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Nanocomposite ultrasonic hydrophones

Abstract

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