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Modeling 1-3 composite piezoelectrics: hydrostatic response.

W A Smith1

  • 1ONR, Arlington, VA.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1993
PubMed
Summary
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This study extends a physical model for piezoelectric composites to analyze hydrostatic response. The model shows how composite structure can enhance piezoelectric properties like hydrostatic charge coefficient, particularly for PZT5 materials.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Acoustics

Background:

  • 1-3 composite piezoelectrics are crucial for sensor applications.
  • Existing models primarily focus on thickness-mode oscillations.
  • Understanding hydrostatic response is vital for hydrophone applications.

Purpose of the Study:

  • To extend a physical model of 1-3 composite piezoelectrics for hydrostatic response analysis.
  • To derive composite material parameters based on constituent properties and volume fraction.
  • To evaluate the hydrostatic performance of composites using PZT5 and modified lead titanate.

Main Methods:

  • Development of a physical model treating the composite as an effective homogeneous medium.
  • Derivation of expressions for composite material parameters.

Related Experiment Videos

  • Analysis of piezoelectric composites with PZT5 and anisotropic modified lead titanate.

    • Main Results:

    • The model provides expressions for composite material parameters relevant to hydrostatic response.
    • For PZT5 composites, the structure enhances hydrostatic charge coefficient, hydrostatic voltage coefficient, hydrophone figure of merit, and hydrostatic coupling coefficient.
    • Modified lead titanate composites showed a shortfall in these properties due to the Poisson effect in the polymer.

    Conclusions:

    • The extended model accurately predicts the hydrostatic response of 1-3 piezoelectric composites.
    • Composite structure significantly influences hydrostatic properties, offering enhancement potential.
    • Material selection and composite design are critical for optimizing hydrophone performance.