Modeling the Dielectric Behavior of Ternary Composites of Epoxy/Barium Titanate (BaTiO3) with Iron Oxide/Ferrite (RE-BT-FE/FR)
The aim of this communication is to model the dielectric behavior of two types of ternary composites prepared with epoxy resin (RE), barium titanate (BaTiO3) with iron oxide (FE) and ferrite (FR). The study has therefore been focused on the effect of adding FE and FR to barium titanate (BT) included in an epoxy matrix. The main theoretical models that are suitable for evaluation of the dielectric constant of ternary composites are studied and applied to RE-BT-FE/FR mixtures. In this work, we use a numerical method based on nonlinear optimization for determining the permittivity of the every constituent and evaluate the model parameters, in order to predict the electromagnetic behavior of the ternary composites. The time domain reflectometry (TDR) experimental procedure is used for characterization of the samples under test in the range from DC to 10 GHz. We explain the choice of the mixture law that better describe the dielectric behavior of the ternary mixtures by comparing the experimental results with the different proposed mixture law. Finally, these materials find their interest in the miniaturization of electronic components used in microelectronic and telecommunication applications.
Index Terms - Ferrite, Iron Oxide, Barium Titanate, Dielectric Permittivity.