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An investigation on the influence of milling time and calcination temperature on the characterization of nano cerium oxide powder synthesized by mechanochemical route

Aminzare, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.materresbull.2012.06.060
  3. Publisher: 2012
  4. Abstract:
  5. The synthesis of nano-sized CeO 2 powder was investigated via mechanochemical reactions between hydrate cerium chloride and sodium hydroxide as the starting materials. The process was followed by a subsequent calcination procedure. Characterization of as-synthesized powder was performed using X-ray diffraction, FTIR spectroscopy, Brunner-Emmett-Teller (BET) nitrogen gas absorption, scanning electron microscopy (SEM) and particle size analyzer (PSA). The precursors were milled for different milling times and then were subjected to different heat treatment procedure at variable temperatures from 100 to 700 °C. According to the results, milling time and calcination temperatures induce paramountal effects on crystallite size and surface area of as-synthesized powders. In addition, the average activation energy for the growth of nanocrystals during calcination was determined to be about 12.53 kJ/mol, suggesting the influence of interfacial reactions on the crystallite growth during the calcination procedure
  6. Keywords:
  7. B. Chemical synthesis ; C. Electron microscopy ; A. Ceramics ; As-synthesized powder ; Calcination procedures ; Calcination temperature ; Cerium chloride ; Cerium oxides ; Chemical synthesis ; Crystallite growth ; FTIR spectroscopy ; Mechanochemical reactions ; Mechanochemical route ; Milling time ; Nano-sized ; Nitrogen gas ; Particle size analyzers ; Sodium hydroxides ; Surface area ; Variable temperature ; Activation energy ; Cerium ; Cerium compounds ; Chlorine compounds ; Fourier transform infrared spectroscopy ; Gas absorption ; Hydrates ; Milling (machining) ; Particle size analysis ; Scanning electron microscopy ; Sodium ; X ray diffraction ; Calcination
  8. Source: Materials Research Bulletin ; Volume 47, Issue 11 , 2012 , Pages 3586-3591 ; 00255408 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0025540812004990