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Development of an Ultrasonic Motor Based on a Piezoelectric Ceramic Sandwiched between Two Laminate Composite Plates
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Piezoelectric Material for High Efficiency Ultrasonic Siren
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The Characterization of Two Dimensional Electrostrictive CuInP2S6 Materials for Transducers
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Dielectric Investigations and Theoretical Calculations of Size Effect in Lead Titanate Nanocrystals
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Bi Effect on the Microstructure and Dielectric Properties of SrTiO3 Thin Films
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Piezoelectric Material for High Efficiency Ultrasonic Siren

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Abstract:

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.

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Advanced Materials Forum III View Preview

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Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

225-229

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.225

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Online since:

May 2006

Authors:

Elena Dimitriu, Alin Iuga

Keywords:

Bimorph Element, Large Scale, Nanostructure, Nb, Ultrasonic Emission

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

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