%D 2016
%R 10.4028/www.scientific.net/JNanoR.41.74
%O cited By 5
%L scholars7905
%J Journal of Nano Research
%K Alumina; Aluminum; Combustion; Crystalline materials; Crystallite size; Gravimetric analysis; High resolution transmission electron microscopy; Morphology; Nanocrystals; Particle size; Phase transitions; Sol-gel process; Sol-gels; Thermogravimetric analysis; Transmission electron microscopy; Ultraviolet visible spectroscopy; X ray diffraction; X ray powder diffraction, Calcining temperature; Effect of annealing; Morphological information; Nano-alumina; Nanocrystalline Al; Sol-gel auto-combustion; Structural characterization; UV visible spectroscopy, Fourier transform infrared spectroscopy
%X Nanocrystalline Al2O3 powder has been successfully synthesized by a simple and fast sol-gel auto-combustion method. The transformation of crystalline phases of as-synthesized nano powders was investigated through X-ray diffraction in terms of their crystallinity and crystallite size. Subsequently, a detailed transmission electron microscopy (TEM) investigation, including specific area electron diffraction (SAED) analysis revealed the crystallographic alterations and morphological information even at lattice scale which co-include the XRD analysis. The results obtained allow to explain the evolution of an amorphous state into different crystalline phases with increased calcining temperature; and their relation to particle size. The particle size is found to be closely related to phase transition of Al2O3 from γ � δ � θ � κ � α. The existence of distinctive bonds and band energy were studied by employing Fourier-transform infrared spectroscopy (FTIR) and UV-visible spectroscopy, respectively. On the other hand, thermo gravimetric analysis (TGA) had also been performed to confirm the phase purity of nano powder. © 2016 Trans Tech Publications, Switzerland.
%P 74-86
%T Effect of annealing temperature on phase transition of nano-alumina synthesized by auto-combustion route
%V 41
%I Trans Tech Publications Ltd
%A M. Adil
%A H.M. Zaid
%A L.K. Chuan
%A N.R.A. Latiff