A Temperature-Dependent Constitutive Model for Relaxor Ferroelectrics
Abstract
This paper addresses the development of a temperature-dependent constitutive model for relaxor ferroelectric materials. These corresponds exhibit a diffuse transition region between the paraelectric arid ferroelectric phases due to the chemical heterogeneity of the materials. At low temperatures, the materials exhibit significant dielectric hysteresis in the relation between the applied field E and the macroscopic polarization P, with the degree of hysteresis decreasing as the temperature increases to the freezing temperature Tf. Above the freezing temperature, the relation is single-valued but nonlinear. These phenomena are modeled by assuring that the material is comprised of an aggregate of micropolar regions having a range of Curie temperatures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2000
- Accession Number
- ADA451959
Entities
People
- Craig L. Hom
- Ralph C. Smith
Organizations
- North Carolina State University