Modeling of domain wall contribution to the effective properties of polycrystalline ferroelectric ceramics

Johannes Roedel; Wolfgang S. Kreher

doi:10.1117/12.388219

14 June 2000 Modeling of domain wall contribution to the effective properties of polycrystalline ferroelectric ceramics

Johannes Roedel, Wolfgang S. Kreher

Proceedings Volume 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics; (2000) https://doi.org/10.1117/12.388219
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

A constitutive model for the nonlinear effective behavior of ferroelectric ceramics is presented. The model is developed on the basis of the effective medium approximation which describes the interaction of the crystallites in a statistical way. Additionally, a particular simplified domain configuration within the crystallites and the possibility of domain wall motion are taken into account. In connection with a thermodynamic criterion for the domain wall displacement the volume fractions of domains can be calculated dependent on the crystallite orientation and the applied load in a self-consistent manner. This mechanism leads to an extrinsic contribution to the effective behavior. If the domain wall displacement is associated with energy dissipation the macroscopic behavior is nonlinear and hysteretic.

Citation Download Citation

Johannes Roedel and Wolfgang S. Kreher "Modeling of domain wall contribution to the effective properties of polycrystalline ferroelectric ceramics", Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, (14 June 2000); https://doi.org/10.1117/12.388219

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