Ferroelectric lead magnesium niobate-lead titanate single crystals for ultrasonic hydrophone applications

S. T. Lau; Kwok Ho Lam; H. L.W. Chan; C. L. Choy; H. S. Luo; Q. R. Yin; Z. W. Yin

doi:10.1016/j.mseb.2004.02.016

Ferroelectric lead magnesium niobate-lead titanate single crystals for ultrasonic hydrophone applications

S. T. Lau, Kwok Ho Lam, H. L.W. Chan, C. L. Choy, H. S. Luo, Q. R. Yin, Z. W. Yin

The Hong Kong Polytechnic University

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

28 Citations (Scopus)

Abstract

Ferroelectric lead magnesium niobate-lead titanate (PMN-PT) single crystals with a composition around the rhombohedral-tetragonal morphotropic phase boundary (65mol% of PMN) were used to fabricate single-element needle-type hydrophones for measuring the spatial and temporal characteristics of medical ultrasonic transducers. PMN-PT single crystal was grown by a modified Bridgman method. Discs (0.5mm thick) with normal along the 〈001〉 direction were cut and then poled by a dc field in the thickness direction. The single crystal has a high relative permittivity (εr∼ 4000) making it appropriate for small area hydrophone applications. Single-element needle-type hydrophones with this material as the sensing element have been fabricated and characterized. The hydrophones have flat frequency response and good receiving sensitivity over certain frequency range in the megahertz region.

Original language	English
Pages (from-to)	25-30
Number of pages	6
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	111
Issue number	1
DOIs	https://doi.org/10.1016/j.mseb.2004.02.016
Publication status	Published - 15 Aug 2004

Keywords

Hydrophone
Piezoelectric
PMN-PT single crystal
Relaxor ferroelectrics

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

More information

10.1016/j.mseb.2004.02.016

Cite this

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abstract = "Ferroelectric lead magnesium niobate-lead titanate (PMN-PT) single crystals with a composition around the rhombohedral-tetragonal morphotropic phase boundary (65mol% of PMN) were used to fabricate single-element needle-type hydrophones for measuring the spatial and temporal characteristics of medical ultrasonic transducers. PMN-PT single crystal was grown by a modified Bridgman method. Discs (0.5mm thick) with normal along the 〈001〉 direction were cut and then poled by a dc field in the thickness direction. The single crystal has a high relative permittivity (εr∼ 4000) making it appropriate for small area hydrophone applications. Single-element needle-type hydrophones with this material as the sensing element have been fabricated and characterized. The hydrophones have flat frequency response and good receiving sensitivity over certain frequency range in the megahertz region.",

keywords = "Hydrophone, Piezoelectric, PMN-PT single crystal, Relaxor ferroelectrics",

author = "Lau, {S. T.} and Lam, {Kwok Ho} and Chan, {H. L.W.} and Choy, {C. L.} and Luo, {H. S.} and Yin, {Q. R.} and Yin, {Z. W.}",

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doi = "10.1016/j.mseb.2004.02.016",

language = "English",

volume = "111",

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Ferroelectric lead magnesium niobate-lead titanate single crystals for ultrasonic hydrophone applications. / Lau, S. T.; Lam, Kwok Ho; Chan, H. L.W. et al.
In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 111, No. 1, 15.08.2004, p. 25-30.

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

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AU - Lau, S. T.

AU - Lam, Kwok Ho

AU - Chan, H. L.W.

AU - Choy, C. L.

AU - Luo, H. S.

AU - Yin, Q. R.

AU - Yin, Z. W.

PY - 2004/8/15

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N2 - Ferroelectric lead magnesium niobate-lead titanate (PMN-PT) single crystals with a composition around the rhombohedral-tetragonal morphotropic phase boundary (65mol% of PMN) were used to fabricate single-element needle-type hydrophones for measuring the spatial and temporal characteristics of medical ultrasonic transducers. PMN-PT single crystal was grown by a modified Bridgman method. Discs (0.5mm thick) with normal along the 〈001〉 direction were cut and then poled by a dc field in the thickness direction. The single crystal has a high relative permittivity (εr∼ 4000) making it appropriate for small area hydrophone applications. Single-element needle-type hydrophones with this material as the sensing element have been fabricated and characterized. The hydrophones have flat frequency response and good receiving sensitivity over certain frequency range in the megahertz region.

AB - Ferroelectric lead magnesium niobate-lead titanate (PMN-PT) single crystals with a composition around the rhombohedral-tetragonal morphotropic phase boundary (65mol% of PMN) were used to fabricate single-element needle-type hydrophones for measuring the spatial and temporal characteristics of medical ultrasonic transducers. PMN-PT single crystal was grown by a modified Bridgman method. Discs (0.5mm thick) with normal along the 〈001〉 direction were cut and then poled by a dc field in the thickness direction. The single crystal has a high relative permittivity (εr∼ 4000) making it appropriate for small area hydrophone applications. Single-element needle-type hydrophones with this material as the sensing element have been fabricated and characterized. The hydrophones have flat frequency response and good receiving sensitivity over certain frequency range in the megahertz region.

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KW - Piezoelectric

KW - PMN-PT single crystal

KW - Relaxor ferroelectrics

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Ferroelectric lead magnesium niobate-lead titanate single crystals for ultrasonic hydrophone applications

Abstract

Keywords

ASJC Scopus subject areas

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