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 language | English |
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Pages (from-to) | 253-263 |
Number of pages | 11 |
Journal | Science and Technology of Advanced Materials |
Volume | 18 |
Issue number | 1 |
Early online date | 15 Mar 2017 |
DOIs | |
Publication status | Published - 12 Apr 2017 |
Keywords
- elastic
- Ferroelectric
- piezoelectric ceramic
- poled
- un-poled
ASJC Scopus subject areas
- Materials Science(all)
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Chris Bowen
- Department of Mechanical Engineering - Professor
- Materials and Structures Centre (MAST)
- Centre for Sustainable and Circular Technologies (CSCT)
- Centre for Nanoscience and Nanotechnology
- EPSRC Centre for Doctoral Training in Statistical Applied Mathematics (SAMBa)
- Institute for Mathematical Innovation (IMI)
- Centre for Biosensors, Bioelectronics and Biodevices (C3Bio)
- Centre for Autonomous Robotics (CENTAUR)
- Faculty of Engineering and Design - Associate Dean (Research)
Person: Research & Teaching