PT/P(VDF-TrFE) nanocomposites for ultrasonic hydrophone applications

Sien Ting Lau; Kin Wing Kwok; Helen Lai Wah Chan; Chung Loong Choy

doi:10.1080/00150190108225200

PT/P(VDF-TrFE) nanocomposites for ultrasonic hydrophone applications

Sien Ting Lau, Kin Wing Kwok, Helen Lai Wah Chan, Chung Loong Choy

Research output: Journal article publication › Journal article › Academic research › peer-review

1 Citation (Scopus)

Abstract

Composite thin films consisting of lead titanate (PT) powder embedded in a vinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) copolymer matrix were prepared by a spin-coating technique. The ceramic and copolymer phases of the composite films were poled separately, resulting in samples with three different polarization states: only the ceramic phase poled, only the copolymer phase poled, and the two phases poled in opposite directions. The piezoelectric and pyroelectric coefficients of the composite films were measured. Since the piezoelectric coefficients of PT and P(VDF-TrFE) have opposite signs while the pyroelectric coefficients have the same sign, the composite film with the two phases poled in opposite directions has a higher piezoelectric but lower pyroelectric coefficient than P(VDF-TrFE). This composite film was used to fabricate a single-element needle-type hydrophone and the performance of the hydrophone was evaluated.

Original language	English
Pages (from-to)	205-210
Number of pages	6
Journal	Ferroelectrics
Volume	263
Issue number	1
DOIs	https://doi.org/10.1080/00150190108225200
Publication status	Published - 1 Dec 2001

Keywords

hydrophone
nanocomposite
P(VDF-TrFE)
PT

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

More information

10.1080/00150190108225200

Cite this

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title = "PT/P(VDF-TrFE) nanocomposites for ultrasonic hydrophone applications",

abstract = "Composite thin films consisting of lead titanate (PT) powder embedded in a vinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) copolymer matrix were prepared by a spin-coating technique. The ceramic and copolymer phases of the composite films were poled separately, resulting in samples with three different polarization states: only the ceramic phase poled, only the copolymer phase poled, and the two phases poled in opposite directions. The piezoelectric and pyroelectric coefficients of the composite films were measured. Since the piezoelectric coefficients of PT and P(VDF-TrFE) have opposite signs while the pyroelectric coefficients have the same sign, the composite film with the two phases poled in opposite directions has a higher piezoelectric but lower pyroelectric coefficient than P(VDF-TrFE). This composite film was used to fabricate a single-element needle-type hydrophone and the performance of the hydrophone was evaluated.",

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AU - Lau, Sien Ting

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AU - Chan, Helen Lai Wah

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N2 - Composite thin films consisting of lead titanate (PT) powder embedded in a vinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) copolymer matrix were prepared by a spin-coating technique. The ceramic and copolymer phases of the composite films were poled separately, resulting in samples with three different polarization states: only the ceramic phase poled, only the copolymer phase poled, and the two phases poled in opposite directions. The piezoelectric and pyroelectric coefficients of the composite films were measured. Since the piezoelectric coefficients of PT and P(VDF-TrFE) have opposite signs while the pyroelectric coefficients have the same sign, the composite film with the two phases poled in opposite directions has a higher piezoelectric but lower pyroelectric coefficient than P(VDF-TrFE). This composite film was used to fabricate a single-element needle-type hydrophone and the performance of the hydrophone was evaluated.

AB - Composite thin films consisting of lead titanate (PT) powder embedded in a vinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) copolymer matrix were prepared by a spin-coating technique. The ceramic and copolymer phases of the composite films were poled separately, resulting in samples with three different polarization states: only the ceramic phase poled, only the copolymer phase poled, and the two phases poled in opposite directions. The piezoelectric and pyroelectric coefficients of the composite films were measured. Since the piezoelectric coefficients of PT and P(VDF-TrFE) have opposite signs while the pyroelectric coefficients have the same sign, the composite film with the two phases poled in opposite directions has a higher piezoelectric but lower pyroelectric coefficient than P(VDF-TrFE). This composite film was used to fabricate a single-element needle-type hydrophone and the performance of the hydrophone was evaluated.

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PT/P(VDF-TrFE) nanocomposites for ultrasonic hydrophone applications

Abstract

Keywords

ASJC Scopus subject areas

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