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Related Experiment Videos

Porous PZT ceramics for receiving transducers.

Hudai Kara1, Rajamani Ramesh, Ron Stevens

  • 1Materials Research Centre, Department of Engineering & Applied Science, University of Bath, Bath BA2 7AY, United Kingdom. H.Kara@bath.ac.uk

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|April 18, 2003
PubMed
Summary

Porous lead zirconate titanate (PZT) piezocomposites, particularly PZT-air, show enhanced performance with increased porosity. These materials offer improved hydrostatic properties for sensitive applications.

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Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Piezoelectric Materials

Background:

  • Porous piezoelectric ceramics offer tunable properties.
  • PZT-polymer and PZT-air composites are explored for advanced applications.
  • Optimizing porosity is key to enhancing piezoelectric performance.

Purpose of the Study:

  • To manufacture and characterize PZT-air and PZT-polymer piezocomposites.
  • To evaluate the impact of porosity/polymer content on key piezoelectric properties.
  • To compare the performance of PZT-air versus PZT-polymer composites.

Main Methods:

  • Fabrication of piezocomposites with varying PZT ceramic volume fractions.
  • Characterization of hydrostatic charge (dh) and voltage (gh) coefficients.

Related Experiment Videos

  • Measurement of permittivity, hydrostatic figure of merit (dh.gh), and absolute sensitivity (M).

    • Main Results:

    • Hydrostatic voltage coefficient (gh) increased with decreasing PZT volume.
    • Hydrostatic figure of merit (dh.gh) peaked at 80-90% porosity/polymer content.
    • PZT-air composites demonstrated superior performance over PZT-polymer composites.

    Conclusions:

    • PZT-air piezocomposites exhibit enhanced hydrostatic properties compared to PZT-polymer.
    • Optimized porosity in PZT-air composites leads to higher sensitivity and figure of merit.
    • Hydrophone performance was slightly reduced by cable loading and low permittivity.