Dielectric behavior of a quaternary composite (RE, BT, MnO₂, CaO) in the band (DC–2 GHz)

Abstract

The main objective of this paper is to study the dielectric behavior of a quaternary composite, made from a mixture of barium titanate (BT), manganese dioxide (MnO2) and calcium oxide (CaO) in the same epoxy resin matrix (RE) maintained at 70% by volume fraction, while those of the other constituents are variable and completing each other in a way to achieve the remaining proportion, i.e. 30%. Random mixtures are made at room temperature and under atmospheric pressure. A dielectric characterization of this mixture type was performed by time-domain spectroscopy (TDS) over a frequency wide band (DC–2 GHz). This has been carried out to illustrate the effect of two oxides (MnO2 and CaO) simultaneously at low frequency (500 MHz), in the presence of (BT), on the composite dielectric behavior. This has led consequently to make a comparison between the present acquired results and those of the ternary composite, where (MnO2) and (CaO) act separately. The results obtained so far in this study allowed us to check the validity of the modified Lichtenecker law (MLL)-based predictive model in the quaternary composite case. The interest of this study lies on applications of these materials in microelectronics circuits and absorber materials in telecommunication domain.

Dielectric Characterization of Heterogeneous Composites Using Time Domain Spectroscopy and Microwave Test Benches in Microwave Frequency

“…This increasing in the dielectric permittivity indicated the same effect of this perovskite titanate BaTiO 3 compared to what has been obtained in previous works [22][23][24][25][26][27][28][29][30]37,38 on other various binary, ternary and quaternary composites containing perovskite titanates such as calcium and strontium titanate.…”

“…2, which involves the following steps. 24 The processes involved in the manufacturing of composite materials typically involve three essential steps: −Impregnation of the reinforcement with resin, which is called the association step. −Shaping the sample into the desired form.…”

“…Fortunately, various characterization techniques are now available that to diagnose and evaluate composite materials. 24 These techniques investigate materials used for the manufacturing and the realization of more reliable systems by determining their electromagnetic properties, such as permittivity, conductivity and quality factor.…”

Study of the relaxation and resonance behaviors of ternary composites: Epoxy–strontium titanate–carbon black

“…The composite sample with a predefined thickness d is placed at the end of the coaxial line cell and terminated by a matched load Z 0 (Figure 1). The experiments have been carried out as described in Bouchaour et al 22…”

Investigation on Dielectric, Electric, and Magnetic Properties of (Epoxy Resin-Titanate-Oxide/Ferrite) Ternary Composites at Microwave Frequency

“…The nonlinear regression method (generalized reduced gradient (GRG) Algorithm) fixes this factor to a second order polynomial by virtue of its nonlinear evolution with respect to the volume fractions of each constituent, ensuring a minimum difference between the experimental data and the theoretical values resulting from the effective dielectric permittivity and effective magnetic permeability of the material under investigation as well as an acceptable level of optimization. We attempted to advance the study of multiphase composites in this work by characterizing and investigating the dielectric and magnetic behaviours of these composite materials in one research, since the previous works 19,[21][22][23][24][25][26][27][28][29] only looked at the dielectric behavior. Additionally, the effect of additives (ST/BT, FE/FR) was added to similar multiphase mixtures in order to calculate their contribution and to compare the improvement in dielectric and electrical properties achieved by these additives with different other mixtures.…”