FARES Kahoul

BENSEGHIR Sabrina

Elaboration, caractérisation et études des propriétés électriques de céramiques dans le système : Pb1 –x Yx/2 Bix/2[(Zr0.53 Ti0.47)0.92 - (Mn1/x Sb2/3)0.08] O3

DJOUDI Yasmina

Elaboration et caractérisation des céramiques piézo-électriques de structure pérovskite : (1-x) Pb (Zr0.52 Ti0.48) O3 – x Y (Ta1/2 Sb1/2)O3 , effet de dopage

BENSEGHIR Sabrina

Elaboration, caractérisation et études des propriétés électriques de céramiques dans le système : Pb1 –x Yx/2 Bix/2[(Zr0.53 Ti0.47)0.92 - (Mn1/x Sb2/3)0.08] O3

DJOUDI Yasmina

Elaboration et caractérisation des céramiques piézo-électriques de structure pérovskite :(1-x) Pb (Zr0.52 Ti0.48) O3 – x Y (Ta1/2 Sb1/2)O3 , effet de dopage

Activated carbon and natural clay are extremely promising for the removal of dyes in a water solution. Natural clay and activated carbon were characterized using X-ray diffraction (XRD) and Fouriertransform infrared spectroscopy (FTIR) techniques, and the food dye was characterized by UV-Visible. The effects of various experimental parameters, such as initial carmine concentration, contact time, temperature and pH were studied. The removal of the dye increases with the decrease in the initial concentration of carmine and the contact time of the solution. The percentage of carmine removal increases accordingly, reaching 97% for activated carbon and 67% for natural clay. Langmuir and Freundlich adsorption models were used for the adsorption equilibrium descriptions. The data was very well corrected with these models. Monolayer adsorption capacities were equal to 31 mgg-1 at pH 8.0 and 27°C. Adsorption measurements show that the adsorption process is very fast and physical in nature. Thermodynamic parameters such as enthalpy ΔH°, ΔS° entropy and ΔG° free enthalpy were also evaluated to reveal the nature of adsorption. The results explain that the adsorption process is an exothermic, spontaneous physisorption

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Abderezak GUEMACHE , Fares KAHOUL , Louanes HAMZIOUI , Samir BOUACHA , , (2024-01-17), Removal of a food dye on two solid supports by adsorption, Brazilian Journal of Environmental Sciences, Vol:58, Issue:3, pages:447-457, Valdir Fernandes

In this research, we study the comparison of the removal of a domestic insecticide declared as an organic pollutant from the water on the surface of the natural clay (N-C) and Montmorillonite sodium (Mnt-Na), where we reveal general information about adsorbents on organic pollutants, as well as physical and chemical methods for their spectral analyses. In addition, we have a simplified explanation of the adsorption phenomenon and then we study the various factors that affect it, represented by the effect of the initial concentration of the pollutant solution, the effect of the pH, temperature and the contact time, conductivity effect, turbidity analysis, and dissolved oxygen analysis. And we have achieved the results that benefit us by comparing the effectiveness of Natural clay (N-C) and Montmorillonite sodium ( Mnt-Na) in the elimination of insecticide, in addition to judging the possibility of describing adsorption by the best adsorbent.

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Abderezak GUEMACHE , Ahmed BOUCHELAGHEM , Mahmoud DRIF , Fares KAHOUL , Louanes HAMZIOUI , , (2023-06-20), Elimination of the Declared Insecticide by Natural and Modified Clay and Montmorillonite Sodium, Journal of Environmental Treatment Techniques, Vol:11, Issue:2, pages:94-99, IIETA

The solid solution of xBi(Fe1/3Nb2/3)O3–(1-x)Pb(Zr0.50Ti0.50)O3 ceramics near morphotropic phase boundary (MPB) (BFN–PZT, x = 0, 0.0025, 0.005, 0.0075, 0.01) were prepared by conventional solid-state reaction method. The samples added with different Bi2O3, Fe2O3, Nb2O5 contents were compared in terms of the phase structure, microstructure, dielectric properties, and piezoelectric properties. In particular, rhombohedral-tetragonal morphotropic phase boundary was observed in BFN–PZT crystal structure near the composition of x = 0.005. The BFN–PZT ceramics exhibited the following optimal properties at x = 0.005: dielectric constant ϵr of 847, dielectric loss tanδ of 0.034, Curie temperature TC of 390°C, electrical conductivity σ of 0.441 (Mohm.m)−1, piezoelectric charge constant d33 of 416 pC/N, electromechanical coupling factor KP of 0.654, and mechanical quality factor Qm of 426, making it a promising material for use in high-intensity ultrasound applications.

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Fares KAHOUL , ,(2023-03-15), Electrical properties of BFN-modified PZT (MPB) ceramics,The 1st INTERNATIONAL SEMINAR ON CHEMICAL PROCESS & ENVIRONMENT,Biskra

No microscopic analysis is possible without dyes, stains or indicators. Indeed, dyes and stains are extraordinarily critical in biology, biochemistry, molecular biology and microbiological research, because they are frequently used to dye or dye certain cellular components, proteins or DNA/RNA to visualize them. In biochemistry and molecular biology, dyes and stains are used to highlight biological tissues and to quantify or qualify the presence of certain chemicals when attached to substrates. In microbiology, dyes and stains are used to make microorganisms visible or differentiate them due to distinct colorings properties. On the other hand, indicators are often used to measure the pH of the samples. They are added to microbiological culture media to detect the metabolic properties of microorganisms. Despite what has just been said, half a dozen of these dyes (E102, E104, and E129), combined with various preservatives, and are thought to be responsible for hyperactivity in some children. Synthetic dyes are also suspected of causing respiratory problems and allergies. Adsorption remains the most recommended classic technique because of its simplicity, efficiency, ease of implementation and low cost. In this context, our study focused on the removal of three dyes: carmine, phenolphthalein, and eosin b on the surface of two adsorbents: activated carbon, natural clay. We used various physico-chemical techniques to determine the crystalline structure of the DRX device, for this to make a clear idea of the chemical binding by the FTIR analysis and finally to know the maximum absorbance λmax of the dyes it is by the UV-Visible analysis method. In addition, we describe a simplified explanation of adsorption kinetics. The results obtained help us to compare the efficiency of active carbon and natural clay for color removal, in addition to the possibility of describing adsorption by the two models of adsorption isotherms Freundlich and Langmuir.

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Abderezak GUEMACHE , Ahmed BOUCHELAGHEM , Mahmoud DRIF , Fares KAHOUL , Louanes HAMZIOUI , ,(2023-03-14), Crystallographic structure‑ and texture‑dependent fracture behavior of polycrystalline BFN–PZT ceramics,The 1st INTERNATIONAL SEMINAR ON CHEMICAL PROCESS & ENVIRONMENT,Biskra

No microscopic analysis is possible without dyes, stains or indicators. Indeed, dyes and stains are extraordinarily critical in biology, biochemistry, molecular biology and microbiological research, because they are frequently used to dye or dye certain cellular components, proteins or DNA/RNA to visualize them. In biochemistry and molecular biology, dyes and stains are used to highlight biological tissues and to quantify or qualify the presence of certain chemicals when attached to substrates. In microbiology, dyes and stains are used to make microorganisms visible or differentiate them due to distinct colorings properties

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Abderezak GUEMACHE , Ahmed BOUCHELAGHEM , Mahmoud DRIF , Fares KAHOUL , Louanes HAMZIOUI , ,(2023-03-14), Heterogeneous phase adsorption of carmine, phenolphthalein and eosin dyes on activated carbon and natural clay, experiments, characterization and physical interpretations,1st International Seminar on Process Engineering & Environment (ISCPE2023),Biskra

The solid solution of xBi(Fe1/3Nb2/3)O3–(1-x)Pb(Zr0.50Ti0.50)O3 ceramics near morphotropic phase boundary (MPB) (BFN–PZT, x = 0, 0.0025, 0.005, 0.0075, 0.01) were prepared by conventional solid-state reaction method. The samples added with different Bi2O3, Fe2O3, Nb2O5 contents were compared in terms of the phase structure, microstructure, dielectric properties, and piezoelectric properties. In particular, rhombohedral-tetragonal morphotropic phase boundary was observed in BFN–PZT crystal structure near the composition of x = 0.005. The BFN–PZT ceramics exhibited the following optimal properties at x = 0.005: dielectric constant ϵr of 847, dielectric loss tanδ of 0.034, Curie temperature TC of 390°C, electrical conductivity σ of 0.441 (Mohm.m)−1, piezoelectric charge constant d33 of 416 pC/N, electromechanical coupling factor KP of 0.654, and mechanical quality factor Qm of 426, making it a promising material for use in high-intensity ultrasound applications.

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Fares KAHOUL , Louanes HAMZIOUI , Abderezak GUEMACHE , Benseghir Sabrina, , (2023-01-30), Structural, dielectric and piezoelectric characterization of BFN-modified PZT-based (MPB) ceramics, Phase Transitions, Vol:96, Issue:2, pages:1-13, TAYLOR & FRANCIS LTD

Heterogeneous phase adsorption of carmine, phenolphthalein and eosin dyes on activated carbon and natural clay, experiment, characterization and physical interpretation

Citation

Fares KAHOUL , ,(2023), Heterogeneous phase adsorption of carmine, phenolphthalein and eosin dyes on activated carbon and natural clay, experiment, characterization and physical interpretation,1st international seminar on chemical process and environment,Biskra

Ca1-xSrxMnO3 (x = 0, 0.1, 0.2) nanoparticules were synthesized by the coprecipitation method. The structural analysis reveals the presence of Octahedral coordination of MnO4. Fourier transform infrared spectroscopy (FTIR) spectra of MnO4 show the occurrence of O-Mn-O vibrational mode at around 590 cm-1. The XRD indicates that the samples are Rhombohedral lattice. The differential and thermo gravimetric analysis, curve obtained from the composition x=0.1,it has distinct pure phase at 600°C. The study of electrochemical behavior was carried out by cyclic Voltammetry (CV) and impedance spectroscopy (EIS).Show that the apparent electrochemical activity improves by increasing the strontium concentration. This is due to the particle size effect of strontium.

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Fares KAHOUL , , (2022), Properties and Characteristic of Perovskite Type Ca1-xSrxMnO3, Journal of New Materials for Electrochemical Systems, Vol:25, Issue:2, pages:145-148, Journal of New Materials for Electrochemical Systems

Ceramics in PYBZT-PMS system with formula Pb1-xYx/2Bix/2[(Zr0.53 Ti0.47)0.92–(Mn1/3 Sb2/3)0.08]O3 (where x=0, 0.00125, 0.0025, 0.00375, 0.005 and 0.00625) were prepared by the conventional solid state sintering at 1200 °C for 2 h in air. The evolution of microstructure and corresponding electrical properties of PYBZT-PMS samples were systematically studied. Phase transition from rhombohedral to tetragonal structure was identified by Raman spectra and XRD results, and the coexistence of two phases (morphotropic phase boundary MPB) was observed near the composition range from x=0.0025 to 0.005. X-ray diffraction analysis revealed that a pure perovskite structure could be maintained for studied compositions. Scanning electron micrographs of the samples show uniform distribution of grain and grain boundaries. The optimum electrical properties of PYBZT-PMS such as dielectric constant εr=1119.397, dielectric loss tanδ=0.01535, Curie temperature Tc=390 °C, bulk density ρ=7.82 g/cm3, electrical conductivity σ=0.709 (Mohm.m)-1, mechanical quality factor Qm=525.232, electromechanical coupling factor KP=0.639, piezoelectric charge constant d31=68.698x10-12 C/N , piezoelectric voltage constant g31=11.349x10-3 m.V/N and Young modulus Y=11.058 x1010 N/m2 were obtained at x=0.00375.

Citation

FaresKAHOUL , ,(2022); Elaboration, caractérisation et études des propriétés électriques de céramiques dans le système : Pb1 –x Yx/2 Bix/2[(Zr0.53 Ti0.47)0.92 - (Mn1/x Sb2/3)0.08] O3,Ouargla,

For half a century, a very important research activity has been dedicated to the study of piezoelectric ceramic compounds PZT, many studies have been conducted to develop these microsystems and understand the phenomena involved. This research aims to better understand the characteristics of a new ceramic with a prevoskite structure ABO3, substitutions have been made on the A and B sites to improve its physical properties. The solid solution of structure (1-x) Pb(Zr0.52Ti0.48) O3-xY(Ta1/2Sb1/2)O3 (abbreviated as PZT-YTS, where x=0, 0.01, 0.02, 0.03, 0.04 and 0.05) was obtained after synthesis by conventional solid method, the samples were heat treated at 1100, 1150 and 1180°C, in order to obtain a denser product with better physical quality. The phase structure, microstructure and corresponding electrical properties were studied. X-ray diffraction and Raman analyses show that the tetragonal phase structure was obtained in all ceramics at room temperature. Scanning electron micrographs of the samples show uniform grain distribution and grain growth inhibition with increasing doping content. The results show that the best characteristics were obtained for the ceramic of maximum density where the relative density reaches 97.7% with x = 0.04 as follows : The dielectric permittivity, dissipation factor, electromechanical coupling factor, Young's modulus, mechanical quality factor, piezoelectric charge constant, true density, and piezoelectric voltage constant, respectively are: εr = 714.9, tanδ = 0.03345, KP = 0.635, Y = 10.528×1010 N/m2, Qm = 622.254, d31 = 74.738×10-12 C/N, ρa = 7.67 g/cm3 and g31 = 10.477×10-3 m-V/N.

Citation

FaresKAHOUL , ,(2022); Elaboration et Caractérisation des céramiques piézo-électriques de structure prévoskite:(1-x) Pb(Zr0.52 Ti0.48) O3 – x Y (Ta1/2 Sb1/2)O3 ,effet de dopage.,Ouargla,

The solid solution of xBi(Fe1/3Nb2/3)O3–(1-x)Pb(Zr0.50Ti0.50)O3 ceramics near morphotropic phase boundary (MPB) (BFN–PZT, x = 0, 0.0025, 0.005, 0.0075, 0.01) were prepared by conventional solid-state reaction method. The samples added with different Bi2O3, Fe2O3, Nb2O5 contents were compared in terms of the phase structure, microstructure, dielectric properties, and piezoelectric properties. In particular, rhombohedral-tetragonal morphotropic phase boundary was observed in BFN–PZT crystal structure near the composition of x = 0.005. The BFN–PZT ceramics exhibited the following optimal properties at x = 0.005: dielectric constant ϵr of 847, dielectric loss tanδ of 0.034, Curie temperature TC of 390°C, electrical conductivity σ of 0.441 (Mohm.m)−1, piezoelectric charge constant d33 of 416 pC/N, electromechanical coupling factor KP of 0.654, and mechanical quality factor Qm of 426, making it a promising material for use in high-intensity ultrasound applications.

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Fares KAHOUL , ,(2022), STRUCTURAL AND PHYSICAL CHARACTERIZATION OF A NEW YTS-PZT CERAMIC,THE 1ST INTERNATIONAL CONFERENCE ON RENEWABLE MATERIALS AND ENERGIES ICRME2022 October 26-27, 2022, OUARGLA-ALGERIA,Ouargla

The solid solution of xBi(Fe1/3Nb2/3)O3–(1-x)Pb(Zr0.50Ti0.50)O3 ceramics near morphotropic phase boundary (MPB) (BFN–PZT, x = 0, 0.0025, 0.005, 0.0075, 0.01) were prepared by conventional solid-state reaction method. The samples added with different Bi2O3, Fe2O3, Nb2O5 contents were compared in terms of the phase structure, microstructure, dielectric properties, and piezoelectric properties. In particular, rhombohedral-tetragonal morphotropic phase boundary was observed in BFN–PZT crystal structure near the composition of x = 0.005. The BFN–PZT ceramics exhibited the following optimal properties at x = 0.005: dielectric constant ϵr of 847, dielectric loss tanδ of 0.034, Curie temperature TC of 390°C, electrical conductivity σ of 0.441 (Mohm.m)−1, piezoelectric charge constant d33 of 416 pC/N, electromechanical coupling factor KP of 0.654, and mechanical quality factor Qm of 426, making it a promising material for use in high-intensity ultrasound applications.

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Fares KAHOUL , ,(2022), ELABORATION AND CHARACTERIZATION OF A YTS-PZT CERAMIC,st International Conference on Chemical matters and Environment Preservation IC-CMEP’22 March 09-10, 2022, Ouargla – Algeria,,Ouargla

PREPARATION, DEVELOPMENT OF PHASES, MICROSTRUCTURES AND ELECTRICAL PROPERTIES OF XCEMENT-( 1-X)PZT CERAMICS

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Fares KAHOUL , Louanes HAMZIOUI , Abderezak GUEMACHE , ,(2022), PREPARATION, DEVELOPMENT OF PHASES, MICROSTRUCTURES AND ELECTRICAL PROPERTIES OF XCEMENT-( 1-X)PZT CERAMICS,THE 1ST INTERNATIONAL CONFERENCE ON RENEWABLE MATERIALS AND ENERGIES ICRME2022 October 26-27, 2022, OUARGLA-ALGERIA,OUARGLA

Ceramics in (1-x)PZT–xBWM system with formula (1-x)Pb(Zr0.50 Ti0.50)O3–xBa(W2/3 Mn1/3)O3, where x¼0.0025–0.01, were prepared by a normal solid-state method and sintered at 1150 _C. The crystal structure, microstructure and dielectric properties of the ceramics were investigated via X-ray diffraction, scanning electron microscopy and dielectric spectroscopy. X-ray diffraction results demonstrate that all the samples lie within the morphotropic phase boundary region. A microstructure with mean grains sizes of 1.71–2.11 lm were found and the apparent density of 7.59–7.75 g/cm3. The Curie temperature (Tc) decreases with increasing BWM content. The room temperature dielectric constant shows a decreasing trend while loss improves with BWM doping.

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Fares KAHOUL , , (2021), Phase structure, microstructure, and dielectric properties of (1–x)Pb(Zr0.50 Ti0.50)O3–xBa(W2/3 Mn1/3)O3 ceramics, ferroelectrics, Vol:572, Issue:1, pages:229–237, Ferroelectrics

Ceramics compositions (1-x)Pb(Zr0.53Ti0.47)O3-xGdMnO3 (x= 0, 0.01, 0.02, 0.03, 0.04, and 0.05) were synthesized by solid-state route and sintered at 1180 °C for 2 h. Structural, microstructural, and dielectric properties of the system were investigated. X-ray structural analysis of the materials confirmed their formation in a single phase with a tetragonal crystal structure. The PZT ceramics doped with 0.04 moles of GdMnO3 exhibited denser and finer microstructures, which produced a high relative density of 7.22 g/cm3 (~98% of the theoretic density). Scanning electron microscopy showed uniform distribution of grain and grain boundaries. Comparing with the undoped ceramics, the dielectric properties of the GM-doped PZT specimens are significantly improved. The maximum dielectric constant (εr=475324) and the minimum dielectric loss (6%) were observed for 0.04 moles of GdMnO3, which indicated that the PZT-GM ceramics are promising to lead to practical applications. Keywords: PZT, dopants, dielectric properties, ceramic, X-ray diffraction, perovskite.

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Fares KAHOUL , , (2021), Structural and dielectric properties of (1-x)Pb(Zr0.53Ti0.47)O3-xGdMnO3 ceramics, Cerâmica, Vol:67, Issue:5, pages:471-475, Cerâmica

Ceramics in PYBZT-PMS system with formula Pb1
xYx/2Bix/2[(Zr0.53 Ti0.47)0.92–(Mn1/3 Sb2/3)0.08]O3 (x¼0–0.00625) were prepared by the conventional solid state sintering. The evolution of microstructure and corresponding electrical properties of PYBZT-PMS samples were systematically studied. Phase transition from rhombohedral to tetragonal structure was identified by Raman spectra and XRD results, and the coexistence of two phases was observed near the composition range from x¼0.0025 to 0.005. Scanning electron micrographs of the samples show uniform distribution of grain and grain boundaries. The optimum electrical properties of PYBZT-PMS such as er ¼ 1119.397, tand¼0.01535, Tc ¼ 390 C, q¼7.82 g/cm3, r¼0.709 (Mohm m)
1, Qm ¼ 525.232, and KP ¼ 0.639 were obtained at x¼0.00375.

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Fares KAHOUL , , (2021), Phase transition, microstructure and electrical properties of Pb1−xYx/2Bix/2[(Zr0.53 Ti0.47)0.92–(Mn1/3 Sb2/3)0.08]O3 piezoelectric ceramics, ferroelectrics, Vol:584, Issue:1, pages:198–211, Ferroelectrics

Perovskite solid solution (1-x)Pb(Zr0.52Ti0.48)O3-xY(Ta1/2Sb1/2)O3 ceramics (abbreviated as PZT-YTS, where x = 0, 0.01, 0.02, 0.03, 0.04 and 0.05) were synthesized by conventional solid state method. The phase structure, microstructure and corresponding electrical properties were studied. X-ray diffraction and Raman analyses show that tetragonal phase structure was obtained in all ceramics at room temperature. Scanning electron micrographs of the samples show uniform grain distribution and grain growth inhibition with the increase of doping content. The dielectric permittivity, dissipation factor, electromechanical coupling factor, Young modulus, mechanical quality factor, piezoelectric charge constant, actual density and piezoelectric voltage constant, for the ceramics with x = 0.04 were: "r = 714.9, tan  = 0.03345, KP = 0.635, Y = 10.528 × 1010 N/m2, Qm = 622.254, d31 = 74.738 × 10−12 C/N, a = 7.67 g/cm3 and g31 = 10.477 × 10−3 m·V/N, respectively, which are optimal in comparison to other studied samples.

Citation

Fares KAHOUL , , (2021), Influence of YTS addition on structural and electrical properties of PZT-based ceramics, Processing and Application of Ceramics, Vol:15, Issue:3, pages:279–287, Processing and Application of Ceramics

This study describes the microstructure, crystal structure, dielectric and piezoelectric behavior of 0.1Pb[Fe1/2Nb1/2]O3-0.9Pb[ZrxTi(1–x)]O3 (x = 0.49-0.55) ceramics synthesized by solid-state reaction. Compositions were sintered at 1180oC for 120 min. Dense and uniform microstructure was seen through microstructural analysis. XRD pattern confirmed the co-existence of tetragonal and rhombohedral perovskite phases in these compositions where 0.51  x  0.53. Compositions with 0.51  x  0.53 resulted in the optimum values of properties, viz. dielectric constant (r) of 1150, piezoelectric coefficient (d31) of 9510–12 C/N, piezoelectric voltage constant (g31) of 7010–3 mV/N and the coupling factor (kp) value of 0.67. Results indicated that this material composition could be suitable for power harvesting and sensor applications.

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Fares KAHOUL , , (2021), Effect of Zr/Ti Ratio on Piezoelectric and Dielectric Propertiesof 0.1Pb[Fe1/2Nb1/2]O3-0.9Pb[ZrxTi(1–x)]O30 Ceramics, Transactions of the Indian Ceramic Society, Vol:80, Issue:1, pages:60-63, Transactions of the Indian Ceramic Society

This study describes structure, dielectric and piezoelectric properties of Pb[(Zr0.45,Ti0.5)(Mn0.5,Sb0.5)0.05]O3 (PZT-PMS) ceramics prepared by conventional mixed-oxide route and sintered at up to 1180 °C. The pre- pared ceramics was characterized by X-ray diffraction and scanning electron microscopy. The piezoelectric constants, dielectric constant, Young’s modulus and electromechanical factors were measured in broad tem- perature range. The results showed that the PZT-PMS ceramics is composed of tetragonal and rhombohedral phases and has the average grain size of about 1 μm. The Pb[(Zr0.45,Ti0.5)(Mn0.5,Sb0.5)0.05]O3 ceramics has excellent dielectric and piezoelectric properties for wide practical applications. Thus, planar coupling factor of 0.70, poled dielectric constant of 8215, the Curie temperature of 345 °C and dielectric loss of 6% were attained in the PZT-PMS ceramics sintered at 1180 °C.

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Fares KAHOUL , , (2020), Structure, dielectric and piezoelectric properties of Pb[(Zr0.45,Ti0.5)(Mn0.5,Sb0.5)0.05]O3 ceramics, Processing and Application of Ceramics, Vol:14, Issue:1, pages:19–24, Processing and Application of Ceramics

Modified-PZT ceramics with a formula (1-x)Pb(Zr0.53 Ti0.47)O3-xSr(Fe2/3, Nb1/3)O3 (doped with isovalent: Sr2+, acceptor: Fe3+ and Donor: Nb5+ ions) abbreviated as (1-x)PZT-xSFN binary system with varying x (x= 0.02, 0.04, 0.06, 0.08 and 0.10) located near the morphotropic phase boundary (MPB) were prepared by a traditional process in a solid state. All the samples were sintered at a temperature of 1200°C during 2 h. The phase structure, the dielectric and piezoelectric properties of the system were studied. In-phase analysis used X-ray diffraction (XRD) at room temperature indicated that the structure of phase of sintered PZT-SFN ceramics was formed in single-phase with a crystalline structure tetragonal. Raman spectroscopy confirms the presence of this tetragonal phase. The optimum electrical parameters are obtained at 0.94Pb(Zr0.53Ti0.47)O3-0.06Sr(Fe2/3, Nb1/3)O3 system: kp= 66.10 %, d31= 145 pC/N, Qm= 473, tanδ= 1.11 %, and ɛr= 1009.

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Fares KAHOUL , , (2020), Study of Dielectric and Piezoelectric Properties of (1-x)PZT-xSFN Ceramics Prepared by Conventional Solid State Reaction Method, J.Chem.Soc.Pak., Vol:42, Issue:2, pages:634-638, J.Chem.Soc.Pak.

PZT ceramics with a perovskite structure of the general formula Pb(ZrTi)O3 are used industrially in new technologies, especially in consumer electronics, due to their excellent dielectric and electromechanical properties. This work aims to synthesize, study the structure and physical characterization of novel PZT ceramic materials with perovskite structure ABO3. Substitutions are made at sites A and B to develop their physical properties. The structure is (1- x) Pb(Zr0.52Ti0.48)O3-xY(Ta1/2Sb1/2)O3 solid solution (referred to as PZT-YTS, where x=0, 0.01, 0.02, 0.03, 0.04 and 0.05) after the classical solid-phase synthesis, the samples were sintered at different temperatures (1100, ,1150, 1180) to find products with denser and better physical quality. Check the phase structure, the corresponding microstructure. X-ray diffraction and Raman analysis showed that all ceramics retained the tetragonal phase structure at room temperature. Scanning electron micrographs of the samples showed a uniform particle size distribution.

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Fares KAHOUL , ,(2020), Development an characterization of PZT ceramics with ABO3 perovskite structure, doping effect,First international conference on materials, energy ergy & environment (MEE’2020),,El ouad

Ce travail a pour objectif d’étude l’impact d’un insecticide à usage domestique qui est classé comme un micropolluant organique, en présence de deux argiles qui jouent le rôle des adsorbants. Les essais ont pour but d’estimer l’élimination des micropolluants organiques par une argile brute et une argile modifiée pour une dose de réactif. Des méthodes d’analyses quantitatives et qualitatives à savoir (DRX, FTIR, pH-conductimètre, turbidimétrie, oxygène dissous,).Les résultats obtenus sont illustrées dans des tableaux et des figures indiquent que l’élimination de l’insecticide par les deux argiles a une visée importante sur l’acidité, la turbidité, et l’oxygène dissous.

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Abderezak GUEMACHE , Fares KAHOUL , ,(2019), élimination d’un insecticide domestique par une argile naturelle,Congrès International sur les Energies Renouvelables et le Développement Durable,Tunisie

This work reported the structural, dielectric, and piezoelectric behavior of (1-x) Pb (Zr0.52 Ti0.48) O3 – x Sm Cr O3 ceramics (abbreviated as PZTSC, where x = 0.005, 0.01, 0.015, 0.02 and 0.025), were prepared by the traditional solid-state reaction method. The phase transition, microstructure, dielectric, piezoelectric properties, and the temperature stability of the ceramics were investigated. X-ray diffraction analysis indicated that as-prepared ceramics were of pure perovskite phase and the possible morphotropic phase boundary (MPB) between the tetragonal and rhombohedral phase compositions were located near the SC content of x ≥ 0.02, confirmed by their corresponding dielectric and piezoelectric properties. All specimens present high relative density above 97%, indicating a wide sintering window for this system. Microstructural investigations of all the samples reveal that SC doping inhibits grain growth. The dielectric and piezoelectric properties show a maximum response at x ≥ 0.02, which corresponds to the morphotropic phase boundary (MPB).

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Fares KAHOUL , Louanes HAMZIOUI , Abderezak GUEMACHE , Michel Aillerie, Ahmed Boutarfaia, , (2019), Structural, dielectric and piezoelectric properties of (1-x) Pb (Zr0.52 Ti0.48) O3–x Sm Cr O3 ceramics, International Journal of Control, Energy and Electrical Engineering (CEEE),, Vol:9, Issue:9, pages:1-5, Prof. Youcef Soufi

This work reported the structural, dielectric, and piezoelectric behavior of (1-x) Pb (Zr0.52 Ti0.48) O3 – x Sm Cr O3 ceramics (abbreviated as PZTSC, where x = 0.005, 0.01, 0.015, 0.02 and 0.025), were prepared by the traditional solid-state reaction method. The phase transition, microstructure, dielectric, piezoelectric properties, and the temperature stability of the ceramics were investigated. X-ray diffraction analysis indicated that as-prepared ceramics were of pure perovskite phase and the possible morphotropic phase boundary (MPB) between the tetragonal and rhombohedral phase compositions were located near the SC content of x ≥ 0.02, confirmed by their corresponding dielectric and piezoelectric properties. All specimens present high relative density above 97%, indicating a wide sintering window for this system. Microstructural investigations of all the samples reveal that SC doping inhibits grain growth. The dielectric and piezoelectric properties show a maximum response at x ≥ 0.02, which corresponds to the morphotropic phase boundary (MPB).

Citation

Fares KAHOUL , Louanes HAMZIOUI , Abderezak GUEMACHE , Michel Aillerie, Ahmed Boutarfaia, ,(2019), Structural, dielectric and piezoelectric properties of (1-x) Pb (Zr0.52 Ti0.48) O3–x Sm Cr O3 ceramics,3ième congrès international sur les énergies renouvelables et développement Durable (ERDD-2019),Monastir-Tunisie.

This work aims, studying the impact of water in the presence of the insecticide domestic use that is classified as an organic micro pollutant, the impact tests were performed in the laboratory on a household insecticide dissolved in water. The aim of the tests is to estimate the micro pollutant impact for a reagent dose. Quantitative and qualitative analysis methods, namely (pH-metry, conductimetry, turbidity; hardness dissolved oxygen, BDO5), and antibacterial activity are used in answer of a polluted water analysis.

Citation

Abderezak GUEMACHE , Fares KAHOUL , Louanes HAMZIOUI , , (2019), The impact of insecticide for domestic use on drinking water, International Journal of Scientific Research &Engineering Technology (IJSET), Vol:10, Issue:10, pages:55-60, Prof. Ille Gebeshuber

PZT ceramics with a perovskite structure of the general formula Pb(ZrTi)O3 are used industrially in new technologies, especially in consumer electronics, due to their excellent dielectric and electromechanical properties. This work aims to synthesize, study the structure and physical characterization of novel PZT ceramic materials with perovskite structure ABO3. Substitutions are made at sites A and B to develop their physical properties. The structure is (1- x) Pb(Zr0.52Ti0.48)O3-xY(Ta1/2Sb1/2)O3 solid solution (referred to as PZT-YTS, where x=0, 0.01, 0.02, 0.03, 0.04 and 0.05) after the classical solid-phase synthesis, the samples were sintered at different temperatures (1100, ,1150, 1180) to find products with denser and better physical quality. Check the phase structure, the corresponding microstructure. X-ray diffraction and Raman analysis showed that all ceramics retained the tetragonal phase structure at room temperature. Scanning electron micrographs of the samples showed a uniform particle size distribution.

Citation

Fares KAHOUL , ,(2019), Synthesis and characterization of new PZT ceramics,First international seminar on green chemistry and sustainable engineering (ISGCSE),,El ouad

PZT ceramics with a perovskite structure of the general formula Pb(ZrTi)O3 are used industrially in new technologies, especially in consumer electronics, due to their excellent dielectric and electromechanical properties. This work aims to synthesize, study the structure and physical characterization of novel PZT ceramic materials with perovskite structure ABO3. Substitutions are made at sites A and B to develop their physical properties. The structure is (1- x) Pb(Zr0.52Ti0.48)O3-xY(Ta1/2Sb1/2)O3 solid solution (referred to as PZT-YTS, where x=0, 0.01, 0.02, 0.03, 0.04 and 0.05) after the classical solid-phase synthesis, the samples were sintered at different temperatures (1100, ,1150, 1180) to find products with denser and better physical quality. Check the phase structure, the corresponding microstructure. X-ray diffraction and Raman analysis showed that all ceramics retained the tetragonal phase structure at room temperature. Scanning electron micrographs of the samples showed a uniform particle size distribution.

Citation

Fares KAHOUL , ,(2019), Synthesis and characterization of new PZT ceramics,Première journée des jeunes chercheurs en génie des procédés (JCGP-2019),,OUARGLA

In the present work, we were interested in the study of the adsorption of the dye crystal violet (CV), cationic dye on the samples of cypress and carob used in this research come from el eulma and constitute cheap resources , abundant and locally available. The objective of this work is to study the potential use of the mixture (cypress and carob) for the treatment of industrial wastewater loaded with dyes, in a research process applicable to wastewater treatment. The first stage consisted in preparing and determining the physico chemical characteristics of materials. The adsorption performances of the various biosorbents, in their raw state or after having undergone thermal or chemical treatments, have been estimated by the adsorption of crystal violet. The influence of different parameters such as temperature, contact time and the initial concentration was studied. The isoelectric points are also studied. The modeling of the kinetics obeys the Nth order model and the nonlinear Sips model correctly describes the adsorption isotherms for cupcar cal and langmuir for cupcar 0.5M. The values of ΔG°, ΔH° and ΔS° show that the adsorption process studied is spontaneous, endothermic and physical.

Citation

Fares KAHOUL , ,(2019), Adsorption and photo-Fenton like decomposition of Congo red using layered double hydroxide,Première journée des jeunes chercheurs en génie des procédés (JCGP-2019),OUARGLA

Ceramics

Citation

Fares KAHOUL , ,(2018), Microstructural, dielectric and piezoelectric properties of PZT ceramics with the addition of BaO and SnO2,Le premier séminaire national de physique et chimie des matériaux, ENSET-Azzaba,Skikda

Ca1-xSrxMnO3 (x = 0, 0.1, 0.2) nanoparticules were synthesized by the coprecipitation method. The structural analysis reveals the presence of Octahedral coordination of MnO4. Fourier transform infrared spectroscopy (FTIR) spectra of MnO4 show the occurrence of O-Mn-O vibrational mode at around 590 cm-1. The XRD indicates that the samples are Rhombohedral lattice. The differential and thermo gravimetric analysis, curve obtained from the composition x=0.1,it has distinct pure phase at 600°C. The study of electrochemical behavior was carried out by cyclic Voltammetry (CV) and impedance spectroscopy (EIS).Show that the apparent electrochemical activity improves by increasing the strontium concentration. This is due to the particle size effect of strontium.

Citation

Fares KAHOUL , ,(2018), Synthèse et caractérisations d’un matériau de type Ca1-xSrxMnO3,Le premier séminaire national de physique et chimie des matériaux, ENSET,Skikda

Electrochimie

Citation

Fares KAHOUL , ,(2018), Effet d’incorporation du tétrathiafulvalène TTF sur une électrode modifiée par un film de polymère organique,The first international Conference on Electrochemical, Science and Technology ICEST 2018,Sétif 1