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Title: PZT/P(VDF-TrFE) nanocomposites for ultrasonic hydrophone applications
Authors: Lau, ST
Zhou, Q
Kwok, KW 
Chan, HLW 
Choy, CL
Keywords: Copolymers
Dielectric films
Differential scanning calorimetry
Lead compounds
Piezoelectric materials
Vinyl resins
X-ray diffraction analysis
Issue Date: 1999
Publisher: IEEE
Source: ISE 10 : 10th International Symposium on Electrets : 22-24 September 1999, European Cultural Centre of Delphi, Greece : proceedings, p. 755-758 How to cite?
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.
ISBN: 0-0780-3502-5
Rights: © 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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