Creeping polarization and remanent strain in ferroelectrics under uniaxial electromechanical loading

Q. D. Liu; J. E. Huber

doi:10.1117/12.713608

17 April 2007 Creeping polarization and remanent strain in ferroelectrics under uniaxial electromechanical loading

Q. D. Liu, J. E. Huber

Proceedings Volume 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007; 652604 (2007) https://doi.org/10.1117/12.713608
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

The time-dependent remanent strain and polarization were measured in initially unpoled PZT-855 under electromechanical loads. Various levels of constant compressive uniaxial stress combined with constant electric field parallel to the stress axis were used to produce the creeping remanent strain and polarization. The remanent quantities were deduced from measurements of total strain and electric displacement by subtracting the linear (reversible) parts of strain and electric displacement, making use of previous measurements of the linear moduli and accounting for their variation with material state. Mechanical compressive stresses alone produce remanent strains that rapidly reach a saturated state. Under combined loading, increasing the compressive stress reduces the observed creep rates caused by an additional electrical loading. The creep behaviour is most significant at loads close to the coercive stress or electric field. At loads well above or below the coercive field levels, the behaviour is nearly rate-independent.

Citation Download Citation

Q. D. Liu and J. E. Huber "Creeping polarization and remanent strain in ferroelectrics under uniaxial electromechanical loading", Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 652604 (17 April 2007); https://doi.org/10.1117/12.713608

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