Crystal structure characterization and AC electrical conduction behavior of sodium cadmium orthophosphate

Enneffati, Marwa; Louati, B.; Guidara, K.; Rasheed, Mohammed; Barille, Régis

doi:10.1007/s10854-017-7901-7

Cited by 55 publications

(20 citation statements)

References 35 publications

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“…is an alternating material for many applications, like solar cell applications, because of its wide optical band gap energy and very good electrical, mechanical, and optical properties like the other transparent conducting oxide materials [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17]. This type of material has a direct optical band gap of about (3.3-3.44) eV at an ambient temperature within II-IV semiconductor groups, and a high absorption coefficient with a low cost.…”

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confidence: 99%

Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

Abbas¹,

Rasheed²

2020

Journal of Southwest Jiaotong University

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In this paper, aluminum doped titanium dioxide nanopowder with doping concentration of different weights were successfully prepared with a simple technique: the classic ceramic technique (or solid-state method). This technique permits the acquiring of powders as pellets with a small amount of the material. The best conditions for the prepared pellets are obtained. Titanium dioxide nanoparticles are mixed with different amounts of aluminum concentrations (0%, 3%, 5%, and 7%). The powders were then mixed and consolidated into pellets and sintered using a conventional furnace at 1100oC. The mechanical, thermal, structural, morphological (including roughness of the samples’ surfaces), and optical properties for those as-prepared samples are demonstrated by: Shore D hardness instrument, roughness test Instrument, Lee's Disc, X-ray diffraction, optical microscope, scanning electronic microscope, energy-dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy, respectively. The effect of aluminum doped concentrations on the characteristics of titanium dioxide nanoparticles depending on the above instruments are studied. The X-ray diffraction patterns appear to the crystallinity of these materials with a grain size between 20 nm and 30 nm. A roughness measurement indicates that the value of titanium dioxide nanoparticles decreases with the addition of aluminum weights according to the results of the hardness of the samples. Moreover, the results showed that the thermal conductivity increased with the increasing weight fraction of aluminum material. The main goal of the present paper is to investigate the annealing temperature-dependent behavior of the broadening parameter and the characteristics of aluminum doped titanium dioxide nanoparticles.

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confidence: 99%

Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

Abbas¹,

Rasheed²

2020

Journal of Southwest Jiaotong University

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“…In order to study the composition and the morphology of our compound we use the SEM and EDX technique . These complementary studies make it possible to distinguish the elements or phases present in our compound by detecting backscattered electrons.…”

Section: Resultsmentioning

confidence: 99%

“…In order to study the composition and the morphology of our compound we use the SEM and EDX technique. [25] These complementary studies make it possible to distinguish the elements or phases present in our compound by detecting backscattered electrons. Based on Figure 2 (with the resolution of 40 μm (a) and 9 μm (b)), it is clear that the sample consists of uniform grains with a dimension around 3.5 μm.…”

Section: Structural and Morphological Studiesmentioning

confidence: 99%

Ferroelectric and electrical properties of LiNaWO₄ compound

Krimi

Karoui

Zghal

et al. 2019

Applied Organom Chemis

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The aim of this work is to elaborate the LiNaWO4 compound, using the solid state method, then to characterize it using an XR study which confirms that it crystallizes in the orthorhombic system with P222 as space group and with the lattice parameters a = 12.82 Å, b = 17.49 Å, c = 7.25 Å and α = β = γ = 90°. The differential scanning calorimetry (DSC) shows two endothermic peaks at T1 = 388 K and T2 = 500 K. The first peak is detected by the dielectric study, attributed to a phase transition from a ferroelectric phase to a paraelectric one, while the second peak indicates the presence of a phase transition, confirmed later by the result of the electrical study. All modes pertaining to vibrations of WO42− tetrahedral appear in the Raman spectrum. Moreover, its impedance response is modeled by a single cell formed by a parallel combination of R//C//CPE, i.e. the response of our compound is that of the grain. The variation of the σg and σdc, as a function of temperature, confirms the phase transition observed in the calorimetric study at T2. The conduction mechanism in the two phases indicates that the first phase (I) is described by the CBH model and the second phase by the OLPT model.

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“…The non-orthogonal Boubaker polynomial is used in [31] for solving the variational problem. The application of an orthonormal Boubaker wavelet can be used in pure and applied physics such as solid state physics in order to solve some optical constants of different materials [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53] .…”

Section: Introductionmentioning

confidence: 99%

Boubaker Wavelet Functions for Solving Higher Order Integro-Differential Equations

Ouda¹,

Shihab²,

Rasheed³

2020

Journal of Southwest Jiaotong University

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In the present paper, the properties of Boubaker orthonormal polynomials are used to construct new Boubaker wavelet orthonormal functions which are continuous on the interval [0, 1). Then, a Boubaker wavelet orthonormal operational matrix of the derivative is obtained with the new general procedure. The matrix elements can be expressed in a simple form that reduces the computational complexity. The collocation method of the Boubaker orthonormal wavelet functions together with the application of the derived operational matrix of the derivative are then utilized to transform the higher-order integro-differential equation into a solution of linear algebraic equations. As a result, the solution of the original problem reduces to the solution of a linear system of algebraic equations and can be sufficiently solved by an approximate technique. The main advantage of the suggested method is that the orthonormality property greatly simplifies the original problem and leads to easy calculation of the coefficients of expansion. Special attention is needed to perform the convergence analysis. The error is analyzed when a sufficiently smooth function is expanded in terms of the Boubaker orthonormal wavelet functions, then an estimation of the upper bound of the error is calculated. The results obtained by the technique in the current work are reported by solving some numerical examples and the accuracy is checked by comparing the results with the exact solution.

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Crystal structure characterization and AC electrical conduction behavior of sodium cadmium orthophosphate

Cited by 55 publications

References 35 publications

Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

Ferroelectric and electrical properties of LiNaWO₄ compound

Boubaker Wavelet Functions for Solving Higher Order Integro-Differential Equations

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Crystal structure characterization and AC electrical conduction behavior of sodium cadmium orthophosphate

Cited by 55 publications

References 35 publications

Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

Ferroelectric and electrical properties of LiNaWO4 compound

Boubaker Wavelet Functions for Solving Higher Order Integro-Differential Equations

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Ferroelectric and electrical properties of LiNaWO₄ compound