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Related Experiment Videos

Selecting passive and active materials for 1.3 composite power transducers.

C Richard1, L Goujon, D Guyomar

  • 1Laboratoire de Génie Electrique et Ferroélectricité, INSA, Villeurbanne, France. crichard@ge-serveur.insa-lyon.fr

Ultrasonics
|August 6, 2002
PubMed
Summary

This study fabricated PZT-polymer composites for underwater transducers, achieving high power densities and efficiency. Optimal configurations utilize low volume fractions and hard PZT types, suggesting suitability for cost-effective power applications.

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Area of Science:

  • Materials Science
  • Acoustics Engineering
  • Ceramic Engineering

Background:

  • PZT-polymer composites offer tunable properties for transducer applications.
  • Underwater power transducers require high efficiency and power density.
  • Optimizing composite composition is crucial for performance and cost-effectiveness.

Purpose of the Study:

  • To fabricate and evaluate 1-3 PZT-polymer composites for underwater power transducer applications.
  • To investigate the influence of PZT type and volume fraction on transducer performance.
  • To determine optimal composite configurations for high power density and efficiency.

Main Methods:

  • Fabrication of 1-3 PZT-polymer composites using the dice and fill method.
  • Evaluation of transducer performance under various drive levels and duty cycles.

Related Experiment Videos

  • Monitoring transducer evolution and destruction under increasing power loads.

    • Main Results:

    • Achieved total acoustic power densities of 30 W/cm² at 350 kHz with 90% efficiency using P189/epoxy piezocomposite at low duty cycles.
    • Power densities up to 20 W/cm² were measured at a 50% duty cycle.
    • Low volume fraction configurations demonstrated better efficiencies due to natural acoustic impedance matching to water.
    • Hard PZT types (Navy III) were found to be optimal.
    • Polymer mechanical losses were comparable to ceramic losses, indicating suitability for low-cost applications.

    Conclusions:

    • 1-3 PZT-polymer composites are suitable for low-cost power underwater transducer applications.
    • Optimal performance is achieved with low volume fractions and hard PZT types.
    • Thermal breakdown near the polymer's glass transition temperature is a key limitation.
    • Understanding polymer losses versus temperature offers avenues for future composite transducer development.