Dielectric behavior of ternary composites of epoxy/BaTiO<sub>3</sub>/(CuO or MgO)

Benhamouda, A.; Forniés-Marquina, J.M.; Bouzit, Nacerdine; Bourouba, Nacerdine

doi:10.1051/epjap/2009043

Cited by 14 publications

(9 citation statements)

References 9 publications

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“…7 In our work, the permittivity is extracted from the TDS measurements with the multiple reflections method for frequencies range from DC up to 30 GHz. 8 SrTiO 3 -based ceramics are considered promising materials for microelectronic microwave applications, due to their unique physical properties, such as high dielectric constant, low dielectric loss, and favorable electrical support stability. 9,10…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…20 Mixing laws are mainly used to determine the permittivity and the permeability of a composite material from measurements made on its components, as a function of the volume fraction of the charge. 21 Under these conditions, they neglect the shape factor in their formulation. For this, we adopt a new approach based on the modified Lichtenecker law (MLL) with nonlinear regression optimization in the case of ternary composites.…”

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confidence: 99%

“…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.…”

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confidence: 99%

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

Arab

Delfouf

Khouni

et al. 2023

ECS J. Solid State Sci. Technol.

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The RE-ST-FE and RE-BT-FE/FR composites have been prepared and characterized using time domain spectroscopy method in the [DC-12.5] GHz range. The dielectric, magnetic, and electrical properties of the ternary composites have been investigated. In the RE-ST-FE composite, the dielectric permittivity (ε’) has been found to decrease from 9.25 to 3.70 with increase in FE concentration. While it has been observed that the electrical conductivity increases as the ST concentration increases reaching a value of 11.6 (mS / m) and shows a percolation behavior with (Vth = 26,9% ST). In the RE-BT-FE/FR composites, the magnetization hysteresis loops have been measured by vibrating sample magnetometer from -3 to +3 kOe. This has made it possible to have a maximum of saturation magnetization equal 29.3 emu/g and the permeability value close to 1.9 with the RE-BT-FR composite which is considered higher than that of the other one. It was found that an increase in the (FE/FR) concentration increases the magnetic permeability, which is confirmed by the modified Lichtenecker law with error ratio less than 0.5%. The results of this study will undoubtedly yield new materials that can be used to miniaturize electronic components used in telecommunications systems, resonators, antennas and wave absorbers.

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“…The experimental values of the complex dielectrics permittivity are obtained by the time domain spectroscopy (TDS) [7,8]. This technique contains two steps: The first step is assumed by the time domain reflectometry (TDR) [9] and the second is the frequency treatment of the signals and the processing data obtained from the previous step by adequate mathematic tools in order to get the desired parameters.…”

Section: Method's Principlementioning

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 composites of epoxy/BaTiO₃/(CuO or MgO)

Cited by 14 publications

References 9 publications

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

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

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

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

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Dielectric behavior of ternary composites of epoxy/BaTiO3/(CuO or MgO)

Cited by 14 publications

References 9 publications

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

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

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

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

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Dielectric behavior of ternary composites of epoxy/BaTiO₃/(CuO or MgO)