Capped ceramic hydrophones

J. F. Tressler, A. Dogan, J. F. Fernandez, J. T. Fielding, Kenji Uchino, R. E. Newnham

Research output: Contribution to journalConference article

23 Citations (Scopus)

Abstract

Attaching specially shaped thin metal caps, each containing a shallow inner cavity, to the electroded surfaces of a piezoelectric ceramic will significantly enhance its hydrostatic sensitivity. The presence of the cavities allows the metal caps to convert a portion of the incident axial-direction stress into radial and tangential stresses of opposite sign, thus allowing the amplified d31 and d33 coefficients of the poled ceramic to now add together as opposed to subtracting from one another, thus magnifying the dh. By capping a PZT-552 disk, the dh can be amplified by a factor of nearly 100 and the gh by a factor of almost 50. These particular hydrophones show the most promise for use in shallow water applications.

Original languageEnglish (US)
Pages (from-to)897-900
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume2
StatePublished - Dec 1 1995
EventProceedings of the 1995 IEEE Ultrasonics Symposium. Part 1 (of 2) - Seattle, WA, USA
Duration: Nov 7 1995Nov 10 1995

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hydrophones
caps
ceramics
cavities
piezoelectric ceramics
shallow water
hydrostatics
metals
sensitivity
coefficients

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Tressler, J. F., Dogan, A., Fernandez, J. F., Fielding, J. T., Uchino, K., & Newnham, R. E. (1995). Capped ceramic hydrophones. Proceedings of the IEEE Ultrasonics Symposium, 2, 897-900.
Tressler, J. F. ; Dogan, A. ; Fernandez, J. F. ; Fielding, J. T. ; Uchino, Kenji ; Newnham, R. E. / Capped ceramic hydrophones. In: Proceedings of the IEEE Ultrasonics Symposium. 1995 ; Vol. 2. pp. 897-900.
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Tressler, JF, Dogan, A, Fernandez, JF, Fielding, JT, Uchino, K & Newnham, RE 1995, 'Capped ceramic hydrophones', Proceedings of the IEEE Ultrasonics Symposium, vol. 2, pp. 897-900.

Capped ceramic hydrophones. / Tressler, J. F.; Dogan, A.; Fernandez, J. F.; Fielding, J. T.; Uchino, Kenji; Newnham, R. E.

In: Proceedings of the IEEE Ultrasonics Symposium, Vol. 2, 01.12.1995, p. 897-900.

Research output: Contribution to journalConference article

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T1 - Capped ceramic hydrophones

AU - Tressler, J. F.

AU - Dogan, A.

AU - Fernandez, J. F.

AU - Fielding, J. T.

AU - Uchino, Kenji

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AB - Attaching specially shaped thin metal caps, each containing a shallow inner cavity, to the electroded surfaces of a piezoelectric ceramic will significantly enhance its hydrostatic sensitivity. The presence of the cavities allows the metal caps to convert a portion of the incident axial-direction stress into radial and tangential stresses of opposite sign, thus allowing the amplified d31 and d33 coefficients of the poled ceramic to now add together as opposed to subtracting from one another, thus magnifying the dh. By capping a PZT-552 disk, the dh can be amplified by a factor of nearly 100 and the gh by a factor of almost 50. These particular hydrophones show the most promise for use in shallow water applications.

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Tressler JF, Dogan A, Fernandez JF, Fielding JT, Uchino K, Newnham RE. Capped ceramic hydrophones. Proceedings of the IEEE Ultrasonics Symposium. 1995 Dec 1;2:897-900.