مجلة الدراسات العليا

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Author: search.filters.author.Abdelrahman A. ElbadawiHas files: Yes

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    Physical properties of Sr2AlVO6 new double perovskite oxide
    (جامعة النيلين, 2009) Yusif A. Alsabah; Abdelrahman A. Elbadawi; Mohamed A. Siddig
    The synthesis, crystal structure, optical and dielectric properties calculations of new double perovskite materials Sr2AlVO6 was described. For that the X- Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Ultra Violet visible (UV), and Impeadence spectroscopies were used. X-ray powder diffraction measurements show that these materials is crystallize in Orthorimbic perovskite structures with (Pnma) space group. Unit cell parameters, atomic positions, crystalline size and site occupancies were calculated by standared Rietveld method through the Fullprof programm. Lattice parameters for Sr2AlvO6 have the values; a = b = 5.5518 Å and c = 7.89380 Å. The Fourier infrared spectroscopy, UV spectroscopy and Impedance spectroscopy were applied to investigate the optical and dielectric properties of Sr2AlVO6 sample; exactly the energy gap, dielectric constant and bond vibration have been measured also. Keywords: Double perovskite, X-Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Ultra Violet visible spectroscopy (UV).
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    Structural, Optical and Electrical properties of Novocrete Material
    (جامعة النيلين, 2008) Ibrahim A. Sulieman; Mohammed A. Siddig; Abdelrahman A. Elbadawi
    From the material science importance in many life fields; the Novocrete material which plays a significance part at buildings and roads becomes a new material that wasn't studied before. The results showed that the Novocrete poses a poly crystalline structure exactly orthorhombic with (Pnma) space group and lattice parameters a = 7.667, b = 4.799 and c = 9.002 Ao respectively. The optical properties that have been examined by both Fourier Transform Infra Red FTIR and Ultra Violet UV showed the bonds and energy band gap; the energy gap value and the multi bonds indicate that the material is insulator and the impedance spectroscopy results confirm the behavior. For environmental issue the material can be classified as an environment friend, the reason is coming from the Novocrete material elements. Key Words: Novocrete, FTIR, UV, XRD, SEM