Said Benramache

Said Benramache
University of Algeria · physical Sciences

phD

About

108
Publications
24,541
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1,413
Citations
Additional affiliations
October 2013 - present
Université de Biskra
Position
  • doctor
January 2010 - December 2015
Université de Biskra
Position
  • physic
January 2000 - December 2015
Université de Algeria
Position
  • physic

Publications

Publications (108)
Article
Full-text available
In this work, we prepared thin films of nickel sulfide by spray pyrolysis on substrates of the glass at temperature of 300°C. The solution used is a mixture of nickel acetate and thiourea as a source of nickel and sulfur respectively, acetic acid was used as a complexing agent, and then heated the resulting layers in an ordinary furnace at 300°C at...
Article
Full-text available
The present study reports on the deposition of Nickel sulfide (NiS) thin films on glass substrates by spray-pyrolysis at 300 ± 5 °C with different concentrations of nickel precursor (0.03, 0.05, and 0.07 M). The precursor aqueous solutions were synthesized using hexahydrated nickel nitrates and thiourea with a stabilization ratio nickel/sulfur of 1...
Article
Zinc oxide codoped with Fluorine and Cobalt thin films (FCZO) were successfully synthesized on heated glass substrate at 380 °C by spray pyrolysis technique. The influence of doping and codoping on the structural, optical and electrical properties were investigated. X-ray diffraction results showed that the undoped and FCZO films exhibit the hexago...
Article
Full-text available
In this work, nickel oxide was deposited on a glass substrate at by spray deposition technique; the structural, optical and electrical properties were studied at different NiO concentrations (0.05, 0.10 and 0.15 mol.l−1). Polycrystalline NiO films with a cubic structure with a strong (111) preferred orientation were observed at all sprayed films wi...
Article
Full-text available
In this work, we have prepared new materials of the nickel sulfide thin films by using the spray pyrolysis technique for promising co-catalyst to improve the photocatalytic performance or superconductivity. The effect of deposition temperature (523, 573 and 623 K) on structural, optical and electrical properties was investigated. The XRD diffractio...
Article
Full-text available
In this article, we have investigated a fitting proposal model for calculating the crystallite size of pure NiO thin films by varying the structural parameters, such as full width at half-maximum β , lattice parameter a and differences in a − a 0 . The experimental data of NiO thin films were prepared at several deposition temperatures in the range...
Article
Full-text available
In this work, copper doped nickel oxide as the thin films have been elaborated by a spin coating method, the nickel chloride hexahydrate (0.8M) and copper (II) chloride dehydrate (Cu/Ni = 0, 2.15, 4.3, 8.6 and 12.9 At.%) were used to prepare the Cu doped NiO thin films. The Cu doped NiO thin films were heated at a crystallization temperature of 600...
Article
In this work, magnesium oxide was elaborated on a glass substrate at 450°C by a pneumatic spray technique. The structural, optical, and electrical properties were studied at different MgO concentrations (.05, .10, .15, and .2 mol L ⁻¹ ). Poly-crystalline MgO films with a cubic structure with a strong (002) preferred orientation were observed at all...
Article
Full-text available
In the present research, the NiO thin films have been deposited by pneumatic spray method at various substrate temperatures. The main object is to find a good structural, optical and electrical properties of NiO tin films with substrate temperature effected. A set of deposition temperature (380, 400, 420, 440 and 460 °C), the NiO thin film was depo...
Article
Full-text available
In this work, the In 2 O 3 thin films have been fabricated using a spin coating technique; this technique was prepared in our laboratory. The effect of the layer times (3, 5, 7 and 9 times) on optical and structural properties was investigated. In 2 O 3 thin films were fabricated by dissolving 0.2 M of the indium chloride dehydrate InCl 3 .2H 2 O i...
Article
Full-text available
We investigated the structural and optical properties of zinc oxide (ZnO) thin film as the n-type semiconductor. In this work, the sol–gel method used to fabricate ZnO thin film on glass substrate with 0.5 mol/l of zinc acetate dehydrates. The crystals quality of the thin film analyzed by X-ray diffraction and the optical transmittance was carried...
Article
Full-text available
In this work, nickel oxide was fabricated on glass substrate at 450 °C by spray pyrolysis technique. The NiO layers were obtained with 0.05M molarity, which were deposited by various deposition rates 20, 40, 60 and 80 ml. The effects of deposition rate on the structural, electrical and optical properties were examined. All fabricated NiO thin films...
Article
Ultrasonic spray deposition was successfully employed to the synthesis of ZnO thin films, then found that can be suitable for application as a transparent conducting electrode. The effects of substrate temperature with film deposition on structural, optical and electrical properties of very thin ZnO films were investigated. ZnO thin films were obse...
Article
The effect of Co doping on optical, structural and electrical properties of Ni1−xCoxO thin films has been successfully deposited on glass substrate by Sol–Gel Sping coating technique. The main objective of this research is to study the Ni1−xCoxO thin films to determine the optical gap energy by various methods and compare of calculated values. The...
Article
Full-text available
The sprayed ZnS thin films were deposited on a glass substrate at 400 °C using ultrasonic spray chemical technique (SPC). In this work, we have studied the effect of film thickness on structure and optical properties of nanostructured ZnS thin films. XRD analysis of ZnS thin films, which confirmed a hexagonal structure of ZnS with good crystallinit...
Article
In this work, the effect of annealing temperature (540, 560, 580 and 600 °C) on synthesis of Co doped NiO thin films were investigated. Co doped NiO thin films were deposited by spin coating method with molarity of 0.8 mol.l⁻¹ at room temperature. The XRD analyses showed that the NiO films have a cubic structure with high crystallite size of in Co...
Article
Full-text available
In the present work, the effect of Na doping on optical, structural and electrical properties of Na doped NiO thin films were studied. The spray pneumatic method was used to deposit the Na doped NiO thin films in the range 0 to 5 wt.%, it are investigated at a substrate temperature of 420 °C with NiO solution 0.1 M. Firstly in the XRD specra, as fo...
Article
Full-text available
A transparent semiconductor ZnO thin film was prepared on glass substrates using spin coating sol-gel method. The coated ZnO films were annealed in air for 2 hours at different temperatures of 0, 450, 500, 550 and 600 °C. The films were obtained at a concentration of sol-gel solution is 0.5 M. In present paper, the structural, optical and electrica...
Article
In present paper, NiO thin films were prepared by sol-gel spin coating technique onto glass substrates at different solution molarities. For the result of XRD analysis reveals that NiO films showed good crystallinity and strong orientation along (200) direction at 0.8 M. for high molarities the thin films showed high transmission property (over 88...
Article
Full-text available
In this paper, a new mathematical model has been developed to calculate the optical properties of nano materials a function of their size and structure. ZnO has good characterizatics in optical, electrical, and structural crystallisation; We will demonstrate that the direct optical gap energy of ZnO films grown by US and SP spray deposition can be...
Article
Full-text available
p class="AMSmaintitle">Abstract The aim of this research work was to codeposit nano-Al<sub>2</sub>O<sub>3</sub> particles into Zn-Ni alloy coatings in order to improve some surface ,properties, the influence of the concentration of Al2O3 is the principal object in order to improve the corrosion resistance of the deposit, which has been made by elec...
Article
Full-text available
This paper presents the results concerning the new correlation between electrical conductivity and Urbach energy was investigated as a function of solution molaritie in ZnO thin films. The model proposals were based on experimental data as discussed in our published paper. ZnO thin films were prepared into the ultrasonic spray method with different...
Article
Full-text available
We investigated the structural, electrical and optical properties of zinc oxide thin films as the n-type semiconductor. In the present paper, the effect of substrate temperature on the synthesis of ZnO thin films was carried out from 250°C to 500°C. ZnO thin films were deposited on glass substrates via ultrasonic spray technique with 0.2mol/L of...
Article
Full-text available
In the present paper, we investigated a new model by theoretical methods; it is based on correlation from the experimental data’s which was used in the calculation the optical gap energy and Urbach energies. These data’s were taken from papers previously published. The choice ZnO thin films and spray only to compare our models with the Indium dopin...
Article
The effect of ageing at 300°C before and after quenched at two temperatures of 180 and 280°C on the Al 2017 alloy was studied. The structural properties were investigated using X-ray diffraction; the microstructural evolution was investigated using scanning electron microscopy and microhardness measurement for the mechanical properties. After vario...
Article
We investigated the structural and optical properties of zinc oxide (ZnO) thin film as the n-type semiconductor. In this work, the sol-gel method used to fabricate ZnO thin film on glass substrate at different solution molarities of 0.1, 0.3 and 0.5 mol/l of zinc acetate dehydrate. The DRX analyses indicated that the coated ZnO films exhibit an hex...
Conference Paper
In present paper, ZnO thin films were deposited using the simple, flexible and cost-effective spray ultrasonic technique at different precursor molarity values. The films deposited on glass substrate at 350 °C. The electrical and structural properties were studied as a function of precursor molarity. The as sprayed films exhibit an hexagonal struct...
Article
We investigated the structural, electrical and optical properties of zinc oxide thin films as the n-type semiconductor. In the present paper, the effect of substrate temperature on the synthesis of ZnO thin films was carried out from 250∘C to 500∘C. ZnO thin films were deposited on glass substrates via ultrasonic spray technique with 0.2mol/L of zi...
Article
Full-text available
In this work, we study the influences of current density on surface morphology and electrochemical characterization of electrodeposited Ni–Mo. The Ni–Mo composite coatings are deposited on pretreated copper substrates by electrolytic deposition. The Ni–Mo solution is taken from nickel sulfate fluid and ammonium heptamolybdate with 10 g/l. The Ni–Mo...
Article
Full-text available
We investigated the optical properties of pure and Aluminum doped zinc oxide thin films as the n-type semiconductor. In this paper, we have studied the deposition of Al doped ZnO thin films on glass substrate at 350 °C, when the films were deposited with 0, 2 and 3 wt using spray pyrolysis technique. % of Al / Zn, the substrates were heated using t...
Article
Full-text available
In this work an experimental study Zinc- nickel composite coatings was conducted. For this, the influence of the concentration of Ni is the principal object in order to improve the corrosion resistance of the deposit, which has been made by electroplating on steel substrates previously treated, have been studied by several characterization methods,...
Article
Full-text available
This paper presents wear behavior of the plasma nitrided 42CrMo4 steel. This steel is used in mechanical industry; it has been assessed by evaluating tribological properties and surface hardness by using a pin-on-disk wear machine and microhardness tester. Experimental results showed that the nitrides ε-Fe2-3N and γ’-Fe4N present in the compound la...
Article
In the present paper, the structural, optical and electrical properties of zinc oxide thin films were studied before and after annealing temperature at 500 °C. The ZnO thin films were sprayed on glass substrates at 350 °C, which were heated using the solar cells method. Polycrystalline films with a hexagonal wurtzite structure with (0 0 2) preferen...
Article
The ZnO thin films were prepared with different precursor molarities by ultrasonic spray and spray pyrolysis techniques on glass substrate at 350 °C. The thin films were deposited at different substrate temperatures ranging between 0.02 and 0.125 M. In this paper we focused our attention on the present a new approach to correlate the Urbach energy,...
Article
This paper considers the implementation of a current control method for switched reluctance motors (SRMs) and presents a novel approach to the correlate and accurate on-line modeling of three phases, 6/4 an SRM drive. This paper is to present a new approach to the description of correlation between the electromagnetic torque and the excitation curr...
Article
The ZnO thin films were deposited at different substrate temperatures by ultrasonic spray and spray pyrolysis techniques. In this paper we present a new approach to control the optical gap energy of ZnO thin films by varying the substrate temperature. The model proposed to calculate the band gap energy with the Urbach energy was investigated. The r...
Article
The ZnO thin films were deposited at different substrate temperatures by ultrasonic spray and spray pyrolysis techniques. In this paper we present a new approach to control the optical gap energy of ZnO thin films by varying the substrate temperature. The model proposed to calculate the band gap energy with the Urbach energy was investigated. The r...
Article
Zinc oxide (ZnO) thin films were deposited on glass substrates by spray pyrolysis technique decomposition of Zinc acetate dihydrate in an ethanol solution with various deposition rates, the ZnO thin films were deposited at 350 °C, the substrates were heated by using the solar cells method. The substrate was R217102 glass in a size of 30 cm × 7.5 cm...
Article
Development of novel nanomaterials as a semiconductor depends on the size and structure. Undoped and doped ZnO with aluminum, cobalt and indium were deposited by ultrasonic spray technique on glass substrate at 350 °C. This paper is to present a new approach to the description of estimate of the crystallite size of doped ZnO with Al, Co and In. The...
Article
We investigated the optical properties of undoped zinc oxide thin films as the n-type semiconductor; the thin films were deposited at different precursor molarities by ultrasonic spray and spray pyrolysis techniques. The thin films were deposited at different substrate temperatures ranging between 200 and 500 °C. In this paper, we present a new app...
Article
Zinc oxide (ZnO) thin films were deposited on glass substrates by spray pyrolysis technique decomposition of zinc acetate dihydrate in an ethanol solution with 30 mL of deposition rate, the ZnO thin films were deposited at two different temperatures: 300 and 350 °C. The substrates were heated using the solar cells method. The substrate was R217102...
Article
Zinc oxide (ZnO) thin films were deposited on glass substrates by spray pyrolysis technique by decomposition of zinc acetate dihydrate in ethanol. The ZnO thin films were deposited at 350 degrees C and annealed at 500 degrees C for 2 h. The substrate was R217102 glass in a size of 30 cm x 7.5 cm x 0.1 cm. The films exhibited a hexagonal wurtzite st...
Article
We investigated the optical properties of pure and Aluminum doped zinc oxide thin films as the n-type semiconductor. In this paper we have focused our attention on the creation of a new approach to calculate the optical gap and Urbach energies, these correlations based on experimental data were published previously in the literatures. The thin film...
Article
Full-text available
In the present paper, we have studied the effect of ageing temperature, ageing time and quenching temperature on structural, microstructure and mechanical properties of Al-Mg-Si alloy. The ageing temperature used in this work was 300 °C pending time 24 and 48 h. The structural properties were investigated using X-ray diffraction; the microstructura...
Article
We investigated the structural and optical properties of ZnO thin films as the n-type semiconductor, the thin films were deposited at different precursor molarities by ultrasonic spray method on glass substrate at 350◦C, as discussed in our published paper. In this paper we focused our attention on the present a new approach to the description of cor...
Article
The transparent conductive pure and doped zinc oxide thin films with aluminum, cobalt and indium were deposited by ultrasonic spray technique on glass substrate at 350 °C. This paper is to present a new approach to the description of correlation between electrical conductivity and crystallite size with dopant concentration of Al, Co and In. The cor...
Article
Transparent conductive Co-doped ZnO thin films were deposited by ultrasonic spray technique. Conditions of preparation have been optimized to get good quality. A set of cobalt (Co)-doped ZnO (between 0 and 3 wt%) thin films were grown on glass substrate at 350 °C. The thin films were annealed at 500 °C for improvement of the physical properties. Na...
Article
This paper presents corrosion and wear behavior of the plasma-nitrided 32CrMoV13 steel. Untreated and plasma nitrided samples were tested. The structure of layers was determined by X-ray diffraction, the morphology was observed by scanning electron microscopy (SEM). The corrosion behavior was evaluated by electrochemical techniques (potentiodynamic...
Article
This paper considered the implementation of a current control method for switched reluctance motors (SRMs) and presented a novel approach to the accurate online modeling of a three phase 6/4 SRM drive. A three phase 6/4 SRM is given theoretical calculation of inductance of the SRM model. The SRM was then tested in a Matlab/Simulink environment and...
Article
Full-text available
Transparent conducting ZnO and Al doped ZnO thin films were deposited on glass substrate by ultrasonic spray method. The thin films with concentration of 0.1 M were deposited at 350 °C with 2 min of deposition time. The effects of ethanol and methanol solution before and after doping on the structural, optical and electrical properties were examine...
Article
The transparent conductive pure and doped zinc oxide thin films with aluminum, cobalt and indium were deposited by ultrasonic spray technique on glass substrate at 350 °C. This paper is to present a new approach to the description of correlation between electrical conductivity and optical gap energy with dopants' concentration of Al, Co and In. The...
Article
We investigated the electrical and optical properties of ZnO thin films as the n-type semiconductor, the thin films were deposited at different precursor molarities by ultrasonic spray and spray pyrolysis techniques. The thin films were deposited at different substrate temperatures ranging between 350 and 550 °C. In this paper we present a new appr...
Article
The transparent conducting ZnO thin films were deposited on glass substrate by ultrasonic spray technique. The optical, electrical and structural properties of the ZnO thin films were studied as a function of the substrate temperatures in the range of 300 to 400 °C. The as deposited film exhibit an hexagonal structure wurtzite and (101) oriented. T...
Article
Cobalt doped zinc oxide (ZnO:Co) thin films were deposited on glass substrates by ultrasonic spray technique decomposition of Zinc acetate dihydrate and cobalt acetate tetrahydrate in an ethanol solution with film thickness. All films are polycrystalline with a hexagonal wurtzite-type structure with a preferential orientation according to the direc...
Article
We investigated the structural and optical properties of ZnO thin films as an n-type semiconductor. The films were deposited at different precursor molarities using an ultrasonic spray method. In this paper we focused our attention on a new approach describing a correlation between the crystallite size and optical gap energy with the precursor mola...
Article
Nitriding treatments of low alloyed steels can be performed only at relatively low temperatures in order to avoid a decrease in corrosion resistance due to nitride layers formation. These conditions promote the formation of compound layer and diffusion zone, which shows high hardness and good corrosion resistance. In the present paper, the influenc...
Article
Full-text available
The thermal performance of a single pass solar air heater with five fins attached was investigated experimentally. Longitudinal fins were used inferior the absorber plate to increase the heat exchange and render the flow fluid in the channel uniform. The effect of mass flow rate of air on the outlet temperature, the heat transfer in the thickness o...
Article
This study focuses on modeling the effects of deep hole traps, mainly the effect of the substrate (backgating effect) in a GaAs transistor MESFT. This effect is explained by the existence, at the interface, of a space charge zone. Any modulation in this area leads to response levels trapping the holes therein to the operating temperature. We subseq...
Article
The effect of aging at 300 °C before and after quenched at two temperatures of 180 and 280 °C on the Al 6000 alloy was studied. The structural properties were investigated using X-ray diffraction; the microstructural evolution was investigated using optical, scanning and transmission electron microscopies and microhardness measurement for the mecha...
Article
Transparent conducting undoped zinc oxide thin films were deposited on glass substrate by ultrasonic spray and spray pyrolysis techniques. The thin films were deposited at different substrate temperatures ranging between 300 and 450 C with various precursor molarities. The correlation between the structural and optical properties suggests that the...
Article
The Urbach energy is playing a role important in the absorption mechanism. In the present work, we have studied a new approach to the description of calculation of the Urbach energy by varying the optical gap energy with precursor molaritie. This calculation based on experimental data of our study published previously in the international journal,...
Article
This paper presents corrosion behaviour of alloy 42CrMo4 steel nitrided by plasma. Different samples were tested: untreated and plasma nitrided samples. The corrosion behaviour was evaluated by electrochemical techniques (potentiodynamic curves and electrochemical impedance spectroscopy). The corrosion tests were carried out in acid chloride soluti...
Article
ZnO thin films were deposited using the simple, flexible and cost-effective spray ultrasonic technique at different precursor molarities values. The films were deposited on a glass substrate at 350 °C. This paper is to present a new approach to the description of correlation between electrical conductivity and optical gap energy with precursor mola...