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Magnesium nanopowder for hydrogen absorption and ammonium perchlorate decomposition

Fahimpour, V ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matlet.2012.07.008
  3. Publisher: 2012
  4. Abstract:
  5. Magnesium nanopowder (MgNP) of 17 nm average size was produced by planetary ball milling of Mg (φ=229 μm) with 10 wt% NaCl (φ=406 μm) for 50 h. NaCl was omissible by dissolution in saturated KOH. Partial oxidation of MgNP occurred, however, in presence of KOH. MgNP-NaCl mixture was, therefore, used for transmission electron microscopy (TEM), scanning electron microscopy (SEM), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and Sieverts equilibrium investigation. DSC analysis of ammonium perchlorate showed one endothermic and three exothermic reactions. MgNP did not noticeably affect on the initial endothermic reaction. But it decreased transformation temperatures of the second and the third exothermic reactions and increased their heat generation. MgNP 10% NaCl mixture absorbed hydrogen and showed depressing effect on NH 4ClO 4 decomposition temperature more than initial Mg micropowder
  6. Keywords:
  7. Energy storage and conversion ; Perchlorate decomposition ; Ammonium perchlorates ; Average size ; Decomposition temperature ; Depressing effects ; Endothermic reactions ; Energy storage and conversions ; Hydrogen absorption ; Micropowders ; Nano powders ; Partial oxidations ; Planetary ball milling ; Transformation temperatures ; Transmission electron microscopy tem ; Ball milling ; Differential scanning calorimetry ; Exothermic reactions ; Hydrogen ; Inorganic compounds ; Nanoparticles ; Nanostructured materials ; Scanning electron microscopy ; Sodium chloride ; Transmission electron microscopy ; X ray diffraction ; Magnesium
  8. Source: Materials Letters ; Volume 85 , 2012 , Pages 128-131 ; 0167577X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0167577X12009688