Enhancement of carbothermic reduction of Al2O3 via mechanical milling

Asep Ridwan Setiawan, Makoto Ohtsuka, Hiroyuki Fukuyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The mixture of Al2O3 and graphite with a molar ratio (1:3) were mechanically milled in a planetary ball mill at room temperature using zirconia ball. The mixture was milled for 0.5, 1, 2, 4 and 8 h in air atmosphere. Unmilled and milled mixtures were characterized using a combination of X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), specific surface area analysis (SSA), and thermogravimetry analysis (TGA). TG analysis indicated that the reduction reaction of milled sample occurs at lower temperature compared to the unmilled sample. Mechanical milling of Al 2O3-graphite mixtures has led to the following results; size reduction of the Al2O3 crystallite up to ∼20nm, formation of amorphous graphite and the increase in the surface area of Al 2O3 particles.

Original languageEnglish
Title of host publication4th Nanoscience and Nanotechnology Symposium, NNS 2011 - An International Symposium
Number of pages4
Publication statusPublished - 2011 Dec 28
Event4th Nanoscience and Nanotechnology Symposium, NNS 2011 - Bali, Indonesia
Duration: 2011 Sep 232011 Sep 25

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other4th Nanoscience and Nanotechnology Symposium, NNS 2011


  • Al O
  • amorphous graphite
  • carbothermic reduction
  • mechanical milling

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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