List of Articles خواص ساختاری

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  1 - Synthesis and Investigation of Structural Properties NiO/MgO Nano-catalysts Prepared by the Modified Sol-gel Method
  A. Obeidavi S. Sanjabi
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  2 - Influence of Solution Concentration on the Optical and Structural Properties of Manganese Oxide Thin Films Derived from Acidic and Basic Sols
  S. Pishdaian F. Esmaeli-Ghodsi
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  3 - Influence of Ammouium Salt Concentration as the Complexing Agent on Structural and Optical Properties of CdS Nanostructured Thin Film Prepared by CBD Method
  M.H. Sarrafi A.A. Youzbashi
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  4 - THE EXPERIMENTAL INVESTIGATION OF ENERGY ABSORBED AND MORPHOLOGICAL PROPERTIES OF ABS.
  احسان صائمی
  Abstract The Microcellular foams are a group of foams which have a lot of micro cells in the size of about 10 microns. In these foams, neutral gases (Nitrogen or Carbon dioxide) are used as a foaming material. Because of their small sizes, these foams have better mecha More

  Abstract The Microcellular foams are a group of foams which have a lot of micro cells in the size of about 10 microns. In these foams, neutral gases (Nitrogen or Carbon dioxide) are used as a foaming material. Because of their small sizes, these foams have better mechanical and physical properties (such as fatigue strength, yield strength and de-electrical and thermal properties) than non-foamed plastics. In this study, the mechanical properties of polystyrene microcellular foams have been studied. The rate of relative density, the size of the cells, the structure of the foams and yield and fatigue strength have been studied and measured. To achieve an optimal structure, the results show that temperature and time of foaming should be controlled carefully. This condition is in the temperature of about 100° c and the time of 100 second. Also, the tensile strength of the foamed sample has been reduced and the rate of energy absorption has been significantly increased. Manuscript profile
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  5 - Fabrication and investigation of structural and electromagnetic wave absorption properties of Barium Strontium Titanate/Cobalt Zinc Ferrite composites
  احمد پوربافرانی
  In this study, barium strontium titanate/cobalt zinc ferrite composites that composed of two different magnetic phases were investigated. Pyroelectric phase consists of barium strontium titanate particles with particle size of about 150 nm and soft magnetic phase consis More

  In this study, barium strontium titanate/cobalt zinc ferrite composites that composed of two different magnetic phases were investigated. Pyroelectric phase consists of barium strontium titanate particles with particle size of about 150 nm and soft magnetic phase consists of cobalt zinc ferrite nanoparticles with particle size of about 30 nm. Two phases were prepared with sol-gel method and under appropriate stoichiometry. XRD analyses indicated formation of pure phase for each magnetic phases and FESEM analysis indicate the structural properties of Cobalt-Zinc ferrite and Barium Strontium Titanate nanoparticles. Investigation of permittivity, permeability and reflection loss of samples indicated the response of electromagnetic waves to these samples in the frequency range of 1-18 GHz. According to the reflection loss of composites, there are two mechanisms for the absorption of electromagnetic waves. In the first region of this frequency band, magnetic loss from Cobalt-Zinc ferrite nanoparticles is dominate and in the last region of this frequency band, dielectric loss from barium strontium titanate is dominate. Manuscript profile
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  6 - Investigations of ethanol, ethylene glycol and deionized water solvents effects on structural and optical properties of Ag-CuO hybrid nano-material synthesized by solvo/hydrothermal-microwave method
  Mehrdad Soltani Farid Jamali-Sheini
  In this research work, the synthesis of hybrid silver (Ag) and copper oxide (CuO) was carried out by solvo/hydrothermal-microwave process in the deionized water (H2O), ethanol (C2H6O) and ethylene glycol (C2H6O2) solvents and the effects of solvent type on structural an More

  In this research work, the synthesis of hybrid silver (Ag) and copper oxide (CuO) was carried out by solvo/hydrothermal-microwave process in the deionized water (H2O), ethanol (C2H6O) and ethylene glycol (C2H6O2) solvents and the effects of solvent type on structural and optical properties were studied. The obtained samples were characterized by X-ray diffractometer (XRD), scanning and transmission electron microscopies (SEM and TEM), photoluminescence (PL) and absorption spectroscopies (UV-Vis). The XRD study of the samples showed presence of Ag (Cubic) and CuO (Monoclinic (phase in the obtained materials. Elemental analysis (EDS) showed presence of Ag, Cu, and O in the samples. Electron microscopes images revealed non-regular and impacted samples of Ag and CuO. The intensity of emission band of synthesized nanostructures in ethanol and ethylene glycol were reduced and it was observed a shift in the absorption edge towards lower wavelength (blue shift) in compared with synthesized samples in deionized water. Manuscript profile