M. KHERIFI Djelel

MCA

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Department

Departement of Physics

Research Interests

Material engineering

Contact Info

University of M'Sila, Algeria

Email : djelel.kherifi@univ-msila.dz

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Recent Publications

2024-12-19

SiO2's influence on the dielectric properties of natural fluorapatite-derived bio-compounds

In this research, powder was prepared for natural fluorapatite and silicon dioxide bio-compounds using Algerian natural fluorapatite (FA) and silicon dioxide, respectively. X-ray powder diffractometers were employed to examine powder production and crystallisation. A scanning electron microscope (SEM) was used to examine the microstructure of specimens that had been sintering at 1100 °C for 1 h. The apparent density increased with the SiO2 amounts increased in bio-compounds. We also use the complex impedance spectroscopy method to report the electrical and dielectric characteristics of bio-compounds based natural fluorapatite with different amounts SiO2 in the 100–106 Hz frequency range. Over a temperature range of 40–400 °C, the conductivity measurements of the produced ceramic are examined. It was discovered that the dielectric constant's real and imaginary components go down as frequency goes up and up when temperature goes up. The non-Debye relaxation process is shown by the varied values of the frequency of the maximum of the imaginary component of the modulus and the impedance.
Citation

M. KHERIFI Djelel, (2024-12-19), "SiO2's influence on the dielectric properties of natural fluorapatite-derived bio-compounds", [national] Ceramics International , Elseiveir

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2024-10-30

Rietveld refinement of natural phosphate using profex

Algerian natural phosphate minerals (N-PH) were processed through milling and subsequent heat treatment, followed by thorough characterization. The resulting powders and samples were analyzed using TG/DTA, XRD, FTIR, and FESEM techniques, with structural refinement carried out via the Rietveld method. FESEM analysis showed morphological changes from spherical to rod-like particles, attributed to sintering. Elemental analysis confirmed the formation of fluorapatite. Rietveld refinement quantified the FAP phase, showing 98.75% purity, and validated the hexagonal structure and arrangement of phosphate and calcium ions.
key words: Algerian natural phosphate. Rietveld method. heat treatment.
Citation

M. KHERIFI Djelel, (2024-10-30), "Rietveld refinement of natural phosphate using profex", [international] The 1st International Conference on Technological Applications of Materials (ICTAM'24) , Ferhat Abbas University, Sétif1

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2024-06-05

Synthesize of fluorapatite nano-bioceramic powder by top-down method

Synthesize of fluorapatite nano-bioceramic powder by top-down method
Citation

M. KHERIFI Djelel, (2024-06-05), "Synthesize of fluorapatite nano-bioceramic powder by top-down method", [national] National Seminar on Nanomaterials: Synthesis and Applications , University of M'hamed Bougara of Boumerd s F culty of Set nee

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2024-05-21

Thermal treatment effects on Algerian natural phosphate bioceramics: A comprehensive analysis

Algerian natural phosphate minerals (N-PH) were subjected to milling and subsequent heat treatment, followed by comprehensive characterization. The resulting powder and samples underwent analysis using TG/DTA, XRD, FTIR, and FESEM techniques, with structural refinement performed through the Rietveld method. Upon heat treatment at 1100 °C, a predominant apatite phase, fluorapatite (FAP), was identified, constituting 98.75 % of the composition. Initially, the N-PH comprised francolite and carbonate co-substituted fluorapatites, alongside a few impurities. The dielectric and electrical properties of the fluorapatite (FAp) compound were examined using complex impedance spectroscopy over a frequency range of 0.1–106 Hz. Conductivity tests of the ceramic were conducted across a temperature range from 50 to 400 °C. An observed decrease in the real and imaginary components of the dielectric constant with increasing frequency, contrasted with an increase with rising temperature. Furthermore, discrepancies between the frequencies at which the imaginary component of the modulus and impedance reached their peaks indicated the presence of a relaxation process not of the Debye type. The computed values of activation energy (Ea) obtained from various approaches exhibited consistency.
Citation

M. KHERIFI Djelel, (2024-05-21), "Thermal treatment effects on Algerian natural phosphate bioceramics: A comprehensive analysis", [national] Ceramics International , Elseiveir

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2023-12-20

Mechanical and physicochemical characteristics of natural Ca 10 (PO4)6(OH)2 dopped sodium silicate.

Natural bovine bone hydroxyapatite (Ca10(PO4)6(OH)2) (BBHA) is a naturally occurring mineral primarily consisting of hydroxyapatite. It has attracted a lot of attention due to its potential applications in various biomedical fields. When calcium phosphate (BBHA) powder is used as the basis for biocompatible ceramic materials in the (P2O2-SiO2-CaO-NaO2) system, sodium silicate is applied as an influencing agent. This allows for the production of biocomposite that satisfy both traditional needs and contemporary trends. This work's main goal is to investigate the effects of additives with varying sodium silicate proportions on the properties of naturally occurring hydroxyapatite (from cow femur bone) processed at various temperatures. It also aims to prepare two- and three-phase compounds with excellent biological properties, specifically promoting bone regeneration and increasing the solubility of (BBHA).
X-ray fluorescence (XRF) identifies elemental composition, emphasizing the concentrations of calcium and phosphorus. X-ray Diffraction (XRD) analysis reveals the crystallographic structure, mineral phases, and crystallinity, shedding light on the material's composition. Mechanical Testing Equipment "HV": to assess the mechanical properties(hardness) of (BBHA) and their compounds. Scanning Electron Microscopy (SEM) investigates surface morphology, particle size, and distribution, offering valuable insights into the structural aspects of BBHA.
The significance of a thorough examination of the mechanical and physicochemical characteristics of BBHA and its compounds, providing insightful information about its potential as a biocompatible and adaptable biomaterial for use in medical applications.
Keywords: Natural hydroxyapatite, biomedical fields, physicochemical, medical applications.
Citation

M. KHERIFI Djelel, (2023-12-20), "Mechanical and physicochemical characteristics of natural Ca 10 (PO4)6(OH)2 dopped sodium silicate.", [national] THE FIRST NATIONAL CONFERENCE ON MATTER SCIENCES NCSM2023 (Presential and online) 20 DECEMBER 2023 DJELFA-ALGERIA , UNIV-DJELFA

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