A5088326053- Geotechnical Engineering and Soil Stabilization
- Clay minerals and soil interactions
- Soil and Unsaturated Flow
- Dielectric properties of ceramics
- Natural Fiber Reinforced Composites
- Grouting, Rheology, and Soil Mechanics
- Ferroelectric and Piezoelectric Materials
- Hygrothermal properties of building materials
- Phase-change materials and chalcogenides
- Concrete and Cement Materials Research
- Chalcogenide Semiconductor Thin Films
- Recycling and utilization of industrial and municipal waste in materials production
- Electrical and Bioimpedance Tomography
- Microwave Dielectric Ceramics Synthesis
- Geotechnical and Geomechanical Engineering
- Advanced Thermoelectric Materials and Devices
- Phase Change Materials Research
- Heat and Mass Transfer in Porous Media
- Cellular and Composite Structures
- Granular flow and fluidized beds
- Innovations in Concrete and Construction Materials
- Additive Manufacturing and 3D Printing Technologies
- NMR spectroscopy and applications
- Magnetic and transport properties of perovskites and related materials
- Aerogels and thermal insulation
Cadi Ayyad University
2021-2024
InDex Pharmaceuticals (Sweden)
2022
Combined modulus and impedance spectra are employed in the present work to explore electrical inhomogeneity carriers’ behaviors a pure bentonite Moroccan clay based on equivalent circuit. It has been clearly observed that properties change due increase of temperature from 300 °C 700 °C. The frequency-dependent imaginary M" Z" curves only one peak at each indicating predominance contribution grains total conduction bentonite. positions these peaks move higher frequencies when increases...
Abstract This paper presents a study of the complex permittivity n - type copper indium selenide semiconductor compound at low temperatures down to −175 °C. Alternating current with frequency varying between 20 Hz and 1 MHz is applied material in order measure dielectric constant ɛ ′ loss D = ″/ ′. found decrease temperature frequency, whereas decreases increases temperature. The experimental data ″ agree expression <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:msup> <m:mrow>...
The complex impedance spectroscopy (CIS) method is usually used in order to analyze the electrical response of different semiconducting disordered materials as a function frequency at temperatures. real and imaginary parts can show semicircles plane that give evidence for presence both bulk grain boundary contributions. Many parameters be deduced from analysis CIS data, such relaxation times activation energies. There are some literature data concerning properties clays (semiconductor, sand,...
Powder bentonite was analyzed by different experimental techniques.The data from SEM (Scanning electron microscope), XRD (X-ray diffraction), and XRF fluorescence) show that is Na-type, with montmorillonite as the dominant phase.The geotechnical study shows a very plastic silty (I P = 445 % > 50%) material.The methylene blue value (MBV) determined to be 0.40 indicating our classified sandy clay, sensitive water not calcareous.The needed for calculations of dynamic thermal characteristics...
Semiconductors and clay materials have significant applications in environmental, civil engineering optoelectronic sectors. The application of an electric field to such systems is subject many works. However, understand the behaviour under influence field, perception its electrical properties essential. In present study, powerful technique complex impedance spectroscopy (CIS) introduced illustrate characteristics two types disordered semiconducting materials. These are Cu5In9Se16, ordered...
Triply Periodic Minimal Surface (TPMS) lattice structures are characterized by their varied microstructures and mechanical properties, which leads to better performance compared classical uniform structures. TPMS-based lattices mainly used in applications requiring low densities high strength. In this work, unit cell size type grading mechanically investigated for solid network with topologies based on triply periodic minimal surfaces, namely Neovius, Primitive, IWP. For grading, the were...
The present work aims to investigate experimentally and analytically the mechanical behavior of a new ecological material based on clay reinforced with different mass percentages short Alfa fiber (0%, 1%, 2%, 3%, 4%).The characterization was carried out by X-ray diffraction (XRD), fluorescence (XRF), infrared spectroscopy, as well microscopic observations using scanning electron microscopy (SEM).The results indicated that consists significant proportion kaolinite, quartz, muscovite.Moreover,...
This work consists in highlighting the influence of granulates rubber on shear strength sand.It deals with study sand-rubber mixtures and particular saturation mechanical properties.In order to granulate content properties sand, direct tests were performed.The results show that sand dry or saturated state increases increasing content.A 20% is optimum value for improving behavior conditions.This also compares obtained a sample under various normal stresses (100, 200, 400 kPa).Increasing...
The frequency dependence of the complex electrical impedance ( Z* ) and modulus M* two types semiconducting materials, is studied. These are Cu 5 In 9 Se 16 (CIS), an ordered defect compound I-III-VI 2 family a novel bentonite clay system which insulator at room temperature semiconductor above 400 °C. experimental data analysed using three derivative methods that take into account effect grains grain boundaries. confirm non-Debye behavior in these systems. Some important parameters related...
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