Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1501874 | Scripta Materialia | 2007 | 4 Pages |
Abstract
The hybrid dielectric dependence of a percolative ferroelectric–metal composite is investigated by analyzing BaTiO3–Ni composite prepared by a conventional ceramic method. It is depicted by a novel theoretical expression that exhibits the relationships between the real permittivity, metal concentration and applied frequency of the system. Both the dipolar response and the space charge polarization contribute to the dielectric constant, especially near the percolation threshold. With decreasing conductivity of the BaTiO3 matrix, the dependence of the dielectric constant on frequency decreases, especially at low frequency and near the percolation threshold.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Zuhuang Chen, Jiquan Huang, Qian Chen, Chenglu Song, Gaorong Han, Wenjian Weng, Piyi Du,