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Proceedings Paper

Mixture theory of domain switching in ferroelectric ceramics
Author(s): Yongzhong Huo; Qing Jiang
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Paper 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.

Paper Details

Date Published: 31 May 1996
PDF: 12 pages
Proc. SPIE 2715, Smart Structures and Materials 1996: Mathematics and Control in Smart Structures, (31 May 1996); doi: 10.1117/12.240821
Show Author Affiliations
Yongzhong Huo, Univ. of Nebraska/Lincoln (United States)
Qing Jiang, Univ. of Nebraska/Lincoln (United States)

Published in SPIE Proceedings Vol. 2715:
Smart Structures and Materials 1996: Mathematics and Control in Smart Structures
Vasundara V. Varadan; Jagdish Chandra, Editor(s)

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