Mixture theory of domain switching in ferroelectric ceramics

Yongzhong Huo; Qing Jiang

doi:10.1117/12.240821

31 May 1996 Mixture theory of domain switching in ferroelectric ceramics

Yongzhong Huo, Qing Jiang

Proceedings Volume 2715, Smart Structures and Materials 1996: Mathematics and Control in Smart Structures; (1996) https://doi.org/10.1117/12.240821
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

A mixture model is proposed to model domain switching in polycrystalline ferroelectric ceramics. Each grain is modeled as a body of mixture consisting of distinct types of domains which are characterized by their mass fractions as internal variables. In this model, domain switching corresponds to changes of mass fractions of the corresponding domains. A thermodynamics-based criterion is proposed to govern domain switching in quasi-static processes. With the present model, one can make grain-level calculations of internal stress and electric fields to which microcracking, the primary cause of the electric fatigue, is attributed. The explicit solution to an idealized 1D polycrystalline ferroelectric system is presented in order to explore the implications of this model.

Citation Download Citation

Yongzhong Huo and Qing Jiang "Mixture theory of domain switching in ferroelectric ceramics", Proc. SPIE 2715, Smart Structures and Materials 1996: Mathematics and Control in Smart Structures, (31 May 1996); https://doi.org/10.1117/12.240821

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