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Abstract

Piezoelectric devices with complex electrode geometries often contain ferroelectric regions that experience little or no electric field and remain unpolarised. Since the un-poled and poled material properties differ it is desirable to account for these regions in a device when developing predictive models or to design piezoelectric transducers. The lack of published data on the elastic properties for un-poled ferroelectrics, specifically the numerous commercial compositions such as lead zirconate titanate, reflects the difficulty of experimental measurement. In this work, a method for predicting un-poled properties from more commonly available poled data has been developed. A new method of calculating these properties is presented which provides a rapid and practical solution to the problem of evaluating the isotropic stiffness and Poisson’s ratio for an un-poled ferroelectric material. The way in which this calculation has been derived and validated is presented and detailed comparisons are made with alternative methods and experimental data.

Original languageEnglish
Pages (from-to)253-263
Number of pages11
JournalScience and Technology of Advanced Materials
Volume18
Issue number1
Early online date15 Mar 2017
DOIs
Publication statusPublished - 12 Apr 2017

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Ferroelectric materials
Piezoelectric devices
Piezoelectric transducers
Poisson ratio
Materials properties
Electric fields
Stiffness
Electrodes
Geometry
Chemical analysis
lead titanate zirconate

Keywords

  • elastic
  • Ferroelectric
  • piezoelectric ceramic
  • poled
  • un-poled

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

A new method to determine the un-poled elastic properties of ferroelectric materials. / Bowen, Chris R.; Dent, Andrew C.; Stevens, Ron; Cain, Markys G.; Avent, Andrew.

In: Science and Technology of Advanced Materials, Vol. 18, No. 1, 12.04.2017, p. 253-263.

Research output: Contribution to journalArticle

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