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Abstract

A finite element model is presented in which bilayer lead zirconate titanate (PZT) structures that are formed from a dense layer and a porous layer are investigated for their hydrostatic sensing properties. The model simulates the poling of the porous ferroelectric material to determine the distribution of poled material throughout the structure. The fraction of PZT successfully poled is found to be closely related to resulting piezoelectric and dielectric properties of the composite. Structures with high layer porosity (>40 vol.%) and porous layer relative thickness (>0.5) were found to have a significantly improved hydrostatic piezoelectric coefficient, dh, hydrostatic voltage coefficient, gh, and hydrostatic figure of merit, dh.gh. The highest dh.gh of 7.74 × 10-12 m2/N was observed in the structure with a porous layer relative thickness of 0.6 and porosity of 60 vol.%, which was more than 100 times higher than that for dense PZT (dh.gh = 0.067 × 10-12 m2/N) and over three times that of PZT with 60 vol.% porosity with 3-3 connectivity (dh.gh = 2.19 × 10-12 m2/N). The results demonstrate the potential for layered porous materials for use in hydrophones.

Original languageEnglish
Title of host publication2017 Joint IEEE International Symposium on Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices and Piezoresponse Force Microscopy Workshop, ISAF-IWATMD-PFM 2017 - Conference
PublisherIEEE
Pages78-82
Number of pages5
ISBN (Electronic)9781509047376
DOIs
Publication statusE-pub ahead of print - 3 Aug 2017
EventJoint IEEE International Symposium on Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices and Piezoresponse Force Microscopy Workshop, ISAF-IWATMD-PFM 2017 - Atlanta, USA United States
Duration: 7 May 201711 May 2017

Conference

ConferenceJoint IEEE International Symposium on Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices and Piezoresponse Force Microscopy Workshop, ISAF-IWATMD-PFM 2017
CountryUSA United States
CityAtlanta
Period7/05/1711/05/17

Keywords

  • finite element
  • hydrophones
  • piezoelectric
  • PZT

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

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    Roscow, J. I., Lewis, R. W. C., Taylor, J., & Bowen, C. R. (2017). Finite element modelling of bilayer porous PZT structures with improved hydrostatic figures of merit. In 2017 Joint IEEE International Symposium on Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices and Piezoresponse Force Microscopy Workshop, ISAF-IWATMD-PFM 2017 - Conference (pp. 78-82). [8000217] IEEE. https://doi.org/10.1109/ISAF.2017.8000217