Effect of mechanical milling on carbothermic reduction of magnesia

Mohammad Nusheh, Hossein Yoozbashizadeh, Masoud Askari, Naoaki Kuwata, Junichi Kawamura, Junya Kano, Fumio Saito, Hidekazu Kobatake, Hiroyuki Fukuyama

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

A mixture of MgO and graphite with a molar ratio (1:1) was subjected to planetary ball milling for 1, 2, 4, and 8 h with the intention of enhancing carbothermic reduction reaction of MgO during subsequent thermal treatment. Unmilled and milled mixtures were characterized using a combination of X-ray diffraction (XRD) analysis, Raman spectroscopy, scanning electron microscopy (SEM), surface area analysis (SSA), and thermogravimetric analysis (TGA). The reduction reaction of milled samples occurred at lower temperature than that of the unmilled sample. A longer milling time engenders a lower reaction temperature. These results are attributable to the increased interfacial area of the sample mixture, nanometer-size refinement of MgO crystallites and amorphization of graphite obtained using the milling process.

Original languageEnglish
Pages (from-to)668-672
Number of pages5
JournalIsij International
Volume50
Issue number5
DOIs
Publication statusPublished - 2010

Keywords

  • Carbothermic reduction
  • Magnesia
  • Mechanical milling
  • Raman spectroscopy
  • Thermogravimetry

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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