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An approach to design a high power piezoelectric ultrasonic transducer

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Abstract

Application of ultrasonic waves has been considerably progressed during the last decade and piezoelectric ceramics have had a common use as the driving source of such waves. However, there is not enough documented information on design and technology of manufacturing a high power ultrasonic transducer. In this paper, an attempt has been made to analyze the stress produced along the oscillating PZT employed ultrasonic head by applying the principles of acoustic wave propagation. Then, based on such analysis, general principles of PZT transducer design, excited by a DC-biased alternating electrical source, has been derived and finally a typical such transducer has been designed, manufactured and tested. By employing finite element modal analysis, the resonance frequency of the transducer was determined and compared with the experimental results. It was concluded that, the constitutive piezoelectric equations referred to in most sources and books are not valid for analyzing the acoustical dynamic stress in ultrasonic transducers. Instead, the analysis should be done with considering the dynamic behavior (elastic, damping and Inertia factors) of the problem.

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Notes

  1. For example, ref. [15] suggests the values of Q m = 7.5 and Q m = 27,500 for Quartz when oscillating in water and air, respectively.

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Acknowledgements

This work was funded by Highly-Distinguished Solid Mechanics Center at AmirKabir University of Technology. Thanks should also be given to Advanced Manufacturing Research Center (AMRC) for their contribution to manufacture the parts, and to Electromagnets Laboratory of Electrical Department of AmirKabir University of Technology where the required equipments were provided to test the transducer. Authors express their sincere appreciation to Dr. Prokic and his colleagues at MPInterconsulting for providing invaluable empirical data and helpful comments.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran

    Amir Abdullah

  2. Mechanical Engineering Department, Toronto University, Toronto, ON, Canada

    Mohsen Shahini

  3. School of Engineering, Tarbiat Modarres University, Tehran, Iran

    Abbas Pak

Authors
  1. Amir Abdullah
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  2. Mohsen Shahini
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  3. Abbas Pak
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Correspondence to Amir Abdullah.

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Abdullah, A., Shahini, M. & Pak, A. An approach to design a high power piezoelectric ultrasonic transducer. J Electroceram 22, 369–382 (2009). https://doi.org/10.1007/s10832-007-9408-8

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  • DOI: https://doi.org/10.1007/s10832-007-9408-8

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