Table of Contents
ISRN Nanotechnology
Volume 2011 (2011), Article ID 692594, 5 pages
http://dx.doi.org/10.5402/2011/692594
Research Article

Process for Producing Nano-Alpha-Alumina Powder

1Maybod Branch, Islamic Azad University, Maybod, Iran
2Department of Chemical & Environmental Engineering, Faculty of Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
3Institute of Tropical Forestry and Forest Products (INTROP), University Putra Malaysia, 43400 Serdang, Selangor, Iran
4School of Material & Mineral Resources Engineering, University Sains Malaysia, Seri AMpangan 14300, Nibong Tebal, Pulau Pinag, Malaysia
5Institute for Colorants, Paint and Coatings, Tehran 16688-14811, Iran

Received 21 March 2011; Accepted 18 April 2011

Academic Editor: C. Malagú

Copyright © 2011 Fatemeh Mirjalili et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper is trying to explore the effect of stirring time on the synthesis of nano-α-Alumina particles. In this study, alumina nanoparticles were synthesized through alkoxide route using sol-gel method, where aqueous solutions of aluminum isopropoxide and 0.5 M aluminum nitrate nanohydrate were used for preparing alumina sol. Sodium dodecylbenzen sulfonate (SDBS) was used as the surfactant stabilizing agent. The prepared solution was stirred at different times (24, 36, 48, and 60 hours) at 60°C. The Samples were, then, characterized by X-ray diffraction, thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and Transmission Electron Microscopy(TEM) . The introduction of different stirring times affected the particle size and shape and the degree of aggregation. By increasing the stirring time, (starting from 24 to 48 hours) the particle size decreased, but agglomeration became hard for 60 hours of stirring time. The finest particle size (20–30 nm) was obtained at 48-hour stirring time.