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Characterization of Ferroelectric Single Crystals With Field Induced Phase Transformations

[+] Author Affiliations
John A. Gallagher, Christopher S. Lynch

University of California, Los Angeles, Los Angeles, CA

Paper No. SMASIS2012-8126, pp. 157-161; 5 pages
  • ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring
  • Stone Mountain, Georgia, USA, September 19–21, 2012
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4509-7
  • Copyright © 2012 by ASME


As new compositions of single crystal relaxor ferroelectrics are developed, the full thermo-electro-mechanical characterization of each composition and the limitations on linear behavior imposed by field driven phase transformations requires a highly specialized set of experiments. This characterization currently requires two crystal cuts which must each be subjected to five electric field-electric displacement cycles at different stress levels, five stress-strain cycles at different electric field levels, and this process must be repeated at five temperatures. In this document, a new approach to characterizing the linear behavior and phase transformation behavior is proposed based on a combination of a work-energy based model of the driving forces for the phase transformation together with data measured through electrical loading while measuring strain and electric displacement, and a measurement of mechanical compliance.

Copyright © 2012 by ASME



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