Dielectric behavior of ternary mixtures: epoxy resin plus titanates (MgTiO3, CaTiO3or BaTiO3) associated to oxides (CaO, MnO2or ZnO)

Bourouba, Nacerdine; Lalla, Khalfa; Jiménez, Juan Pablo Martínez; Bouzit, Nacerdine

doi:10.1051/epjap/2013130364

Cited by 14 publications

(16 citation statements)

References 6 publications

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“…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.…”

Section: Resultssupporting

confidence: 85%

“…For about three decades and thanks to the considerable progress made in electromagnetic modeling and calculations, efforts and attempts using numerical methods for the calculation of the effective dielectric permittivity of composites have made it possible to obtain values closer to the exact values than those given by the laws of analytical mixtures. 22 From a research and industrial point of view, modeling composite materials allows for their efficient analysis, saving both time and cost. This requires a more complete understanding of their properties, as dielectrics change according to constituent phase concentrations, phase morphology, permittivity of each phase and preparation conditions.…”

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confidence: 99%

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

Djouada¹,

Bouzit²,

Delfouf³

et al. 2023

ECS J. Solid State Sci. Technol.

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Dielectric composite materials made of polymers and ferroelectric ceramics have recently emerged as one of the important components for applications involving the generation, transformation, and storage of sustainable energy. Because there is a trade-off between dielectric permittivity, dielectric loss, and dissipation factor, the end use is the energy storage capacity. In the present study, epoxy resin (RE)/barium titanate (BaTiO3) composite samples are prepared using the mixture cast method with new molds. The dielectric properties, such as dielectric permittivity, dielectric loss, electrical modulus, static conductivity and dissipation factors due to the concentration of barium titanate and frequency effect on the composites, are examined using two characterization methods. The objective of this study is to determine the dielectric permittivity of the material using two microwave methods, the first is time domain spectroscopy (TDS) and the second is on the X-band microwave test bench (MTB). Additionally, different empirical mixture laws are used to estimate the dielectric permittivity of our composites. It is found that an increase in filler concentration (BaTiO3) increases the effective dielectric permittivity, which is confirmed with different empirical mixture models. The findings of this research can be used for electrical devices, including sensors, wave absorbers, resonators, and antennas.

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Section: Resultssupporting

confidence: 85%

mentioning

confidence: 99%

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

Djouada¹,

Bouzit²,

Delfouf³

et al. 2023

ECS J. Solid State Sci. Technol.

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“…To extract the complex dielectric permittivity ε * of a sample under test from measurement signals, we adopt the calculation method described in Bourouba et al 23 and Bouzit et al 24 On the other hand, we can develop an expression that gives relation between the input admittance Y in ω , the characteristic admittance Y 0 , and the complex permittivity ε * as follows:…”

Section: Methodsmentioning

confidence: 99%

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

Khouni

Bouzit

2019

Polymers and Polymer Composites

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The principal subject of the present article is the study of the phenomenon of dispersion as well as the effect of the concentration of strontium titanate (SrTiO3) and carbon black on the complex permittivity of ternary composites: epoxy resin–SrTiO3 –black carbon. The relative permittivity of the mixtures as a function of volume fraction of SrTiO3 was modeled by the modified Lichtenecker mixing law (MLL). A new dispersion model, based on the Lorentzian resonance model, has been proposed to describe the frequency behavior of complex permittivity. For these ternary composites, the frequency dispersion behavior of the complex permittivity that exhibits both relaxation and resonance spectra with increasing SrTiO3 concentration has been showed. The new empirical equation proposed in our work has been well describing the complex permittivity of resonance type for the SrTiO3 and carbon black composites. The effects of SrTiO3 content on the electromagnetic properties and absorption characteristics of electromagnetic waves of epoxy resin composites were studied. As the volume fraction of SrTiO3 increases, it was confirmed that the complex permittivity of the composites follows the MLL and the resonant frequency shifted toward the high frequency range. The resonance frequency of the composites was estimated in good agreement with the theoretical values calculated by the second new equation proposed in this article. Complex permittivity is measured using time domain spectroscopy in the frequency range direct current (DC) to 30 GHz.

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“…The samples are prepared at room temperature and under an atmospheric pressure with the load constituents partitioned in volume fraction from 0% to 30% with step of 5%. The RE matrix is fixed at 70% in order to have a better mixture viscosity [11]. The characterization is performed from a measurement bench with a coaxial line, in which the samples have to be well-adapted so that the composite sample with two parallel faces should have a toroid form with 7 mm outer diameter, 3 mm inner diameter, and 1,9 mm to 2 mm thickness.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

“…A descriptive study of heterogenic mixtures dielectric behavior has been made by several classical mixtures laws [11][12][13]. One of these being used in our paper work is the Lichtenecker law [5] which seems to be a very general use because it translates satisfactorily the dielectric behavior of the composite materials.…”

Section: Theoretical Modelmentioning

confidence: 99%

Electromagnetic Characterization of a Composite (RE-CB-MT) by Time Domain Spectroscopy

Bounar

Bouzit

Bourouba

2017

Advances in Materials Science and Engineering

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The aim of this article is to study the dielectric behavior (ε, σ) in microwaves domain of composites made with Epoxy Resin (RE), Carbon Black (CB), and Magnesium Titanate (MT) on a large band of frequency. This kind of composites is very solicited for applications and miniaturization of the components circuits (cavities, antennas, substrates, etc.) in hyperfrequency electronics. In this study we have also highlighted the effect of the fillers nature and their concentrations on the behavior of these composites. The results obtained by time domain spectroscopy (TDS) have revealed the strong dependence of complex permittivity of the composite materials on both the nature and the concentration of conductive environment. Low frequency analysis (500 MHz) has been investigated to determine the conductivity of composites which is related to the percolation phenomenon. Moreover, the comparison between experimental results and theoretical models shows that the modeling Lichtenecker law is applicable to the ternary mixture in this frequency range and is in accordance with the approach postulated by Bottreau.

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Dielectric behavior of ternary mixtures: epoxy resin plus titanates (MgTiO₃, CaTiO₃or BaTiO₃) associated to oxides (CaO, MnO₂or ZnO)

Cited by 14 publications

References 6 publications

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

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

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

Electromagnetic Characterization of a Composite (RE-CB-MT) by Time Domain Spectroscopy

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