Enhancement of carbothermic reduction of Al2O3 via mechanical milling

Asep Ridwan Setiawan; Makoto Ohtsuka; Hiroyuki Fukuyama

doi:10.1063/1.3667239

Enhancement of carbothermic reduction of Al₂O₃ via mechanical milling

Asep Ridwan Setiawan, Makoto Ohtsuka, Hiroyuki Fukuyama

Division of Inorganic Material Research

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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 language	English
Title of host publication	4th Nanoscience and Nanotechnology Symposium, NNS 2011 - An International Symposium
Pages	132-135
Number of pages	4
DOIs	https://doi.org/10.1063/1.3667239
Publication status	Published - 2011 Dec 28
Event	4th Nanoscience and Nanotechnology Symposium, NNS 2011 - Bali, Indonesia Duration: 2011 Sept 23 → 2011 Sept 25

Publication series

Name	AIP Conference Proceedings
Volume	1415
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	4th Nanoscience and Nanotechnology Symposium, NNS 2011
Country/Territory	Indonesia
City	Bali
Period	11/9/23 → 11/9/25

Keywords

Al O
amorphous graphite
carbothermic reduction
mechanical milling

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.3667239

Cite this

Setiawan, AR, Ohtsuka, M & Fukuyama, H 2011, Enhancement of carbothermic reduction of Al₂O₃ via mechanical milling. in 4th Nanoscience and Nanotechnology Symposium, NNS 2011 - An International Symposium. AIP Conference Proceedings, vol. 1415, pp. 132-135, 4th Nanoscience and Nanotechnology Symposium, NNS 2011, Bali, Indonesia, 11/9/23. https://doi.org/10.1063/1.3667239

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abstract = "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.",

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N2 - 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.

AB - 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.

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