High Energy Milling of Alumina Synthesized by Combustion Reaction Using a Vertical Shaft Attritor Mill: Influence of the Milling Time Length

Abstract:

Among the vast applications in which the α-alumina can apply, the literature has reported researches which aim to achieve better features of these materials varying the obtainment methodology and some post-obtainment techniques. Thus, this paper aims to evaluate how different milling time lengths of 15, 30, 45 and 60 minutes alter the structure and morphology of α-alumina powders synthesized by combustion reaction. The time and temperature of the combustion reaction were evaluated during the synthesis of the alumina. The samples of non-milled and milled alumina were characterized by XRD and particle size analysis. The results showed that the maximum achieved temperature of reaction was 598°C. The milling time length variation did not alter the stable α-Al₂O₃ majority crystal phase present in all samples. The average particle diameter was reduced from 23.3 to 10.5 μm comparing the non-milled and the sample milled for 60s.

• Periodical: Materials Science Forum (Volume 820)
• Pages: 155-160
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.820.155
• Online since: June 2015
• Authors: Mirele Costa da Silva, N.C.O. Costa, D.S. Lira, Joelda Dantas, A.C.F.M. Costa, Normanda Lino de Freitas
• Keywords: Alumina, Attritor Mill, Milling Velocity, Time Length

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