Piezoelectric Material for High Efficiency Ultrasonic Siren

Abstract:

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A PZT-type material, doped with niobium and lithium was prepared by the ceramic technique. The microstructure of the sintered material at 1280oC was performed by scanning electron microscopy (SEM), transmission electron microscopy and by X-ray diffraction. Dielectric and piezoelectric properties were measured. The good planar properties of the material made it possible to obtain ceramic disks with a strong radial mode. Two such disks, glued together, with opposed polarisation constitute a bimorf element, which successfully converts the radial mode into a flexural one. At the center of the bimorf a conical acoustical impedance adapter is fixed in order to increase the frontal acoustical emission of the device. This ultrasonic device provides a broad – band, high acoustical emission, and is suitable to work as a high efficiency ultrasonic siren. It can be used in intruder alarm devices, ultrasonic telemeters.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

225-229

DOI:

10.4028/www.scientific.net/MSF.514-516.225

Citation:

E. Dimitriu and A. Iuga, "Piezoelectric Material for High Efficiency Ultrasonic Siren", Materials Science Forum, Vols. 514-516, pp. 225-229, 2006

Online since:

May 2006

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Price:

$35.00

[1] D.A. Berlincourt, D.R. Curran and H. Jaffe: Piezoelectric and piezomagnetic materials - Physical acoustics principles and methods, Vol. I-part A, Warren P. Mason, (Academic Press, London 1964).

[2] B. Jaffe B., W. R. Cook and H. Jaffe: Piezoelectric Ceramics (Acad. Press London and N.Y. 1974).

[3] W. Wolny: Conference Notes of the Meeting Piezoelectric Materials for the End User, (Interlaken, Switzerland 2002).

[4] J.A. Gallego- Juarez: J. Phys. E: Sci. Instrum. Vol. 22 (1989), p.804.

[5] J. Szilard: Ultrasonic Testing, (A. Wiley-Interscience Publication 1982).

[6] J. van Randeraat and R. E. Setterington: Piezoelectric Ceramics (Philips' Appl. Book, Mullard Ltd. 1974).

[7] J. Krautkrämer and H. Krautkrämer: Ultrasonic testing of materials (Springer Verlag, NewYork 1969).

[8] E. Dimitriu, P. Nicolau and V. Teodoru : Ultrasounds - Utilization in Food Industry and Biology (Ed. CERES, Bucharest 1990).

[9] E. Dimitriu: Patent No. 109905, OSIM, Bucharest, (1995).

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