Tanda, Egypt
Tanda, Egypt

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Sekkina M.M.A.,Materials Science Unit | Elsabawya K.M.,Taif University | El-Maghraby A.,National Research Center of Egypt | El-Maghraby A.,Taif University
Oriental Journal of Chemistry | Year: 2013

The present investigations introduce new trend of applying AFM-microscopy to visualize a real 3D-imaging of sample's surface topography. High resolution AFM-investigations indicated that crystalline asprin has regular arrays of atomic arrangement with no violation in the bulk of asprin. TM deflection AFM- gave us good approximation to the diffusion of grain throughout the surface topology of investigated asprin. The AFM-deflection centers imaging indicated that the numbers of grains distribute in circular arrangements on the surface and material bulk. 3D-visualized imaging introduce precise determination of exposure surface area interacting with dissolving agent.


Elsabawy K.M.,Materials Science Unit | Elsabawy K.M.,Taif University | Abou Sekkina M.M.,Materials Science Unit | Asker M.A.,Materials Science Unit | And 2 more authors.
Solid State Sciences | Year: 2010

The sample with in the general formula Bi2-xPbxSrV2O9, where x = 0.0, 0.05, 0.1, 0.2, 0.3, and 0.6 mol were synthesized by the high temperature solid state reaction and firing method. The X-ray diffractograms confirmed the formation of single phased layered perovskite in all samples. TGA and DTA thermal analyses on the green samples included steps of thermal analysis of strontium carbonate, bismuth carbonate, ammonium vanadate, lead oxide and finally on the high temperature solid state formation. The effect of lead dopings on the sintering, structural and micro-structure, properties of 212BiSrV-ceramics were investigated. The infrared absorption spectra show a series of vibrational modes within the range of 400-1600 cm-1. © 2010 Elsevier Masson SAS. All rights reserved.

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