Journal
JOURNAL OF ELECTROCERAMICS
Volume 18, Issue 1-2, Pages 129-137Publisher
SPRINGER
DOI: 10.1007/s10832-007-9015-8
Keywords
nonlinear composite; electrostatic problem; overall properties; local electric field; homogenization; tunability
Categories
Ask authors/readers for more resources
This paper addresses the rigorous treatment of the tunability effect (dc electric field driven variation of the permittivity) in a high-contrast two dimensional periodic composite (a matrix of a large dielectric constant ferroelectric material with linear dielectric inclusions). The theoretical analysis here shows that the trend established for the case of low linear dielectric concentrations (that the dilution with a low permittivity dielectric does not result in decrease of the tunability of the composite material), can hold for appreciable dielectric concentrations. We have even documented a pronounced increase of the tunability. The results of our simulations are in qualitative agreement with the experimental data on the composite effect in ferroelectric/dielectric binary-phase systems. The result of the numerical analysis gives no support to the decoupled approximation in the effective medium approach often used for the description of the dielectric non-linearity of composites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available