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HomeJournal of Nano ResearchJournal of Nano Research Vol. 41Effect of Annealing Temperature on Phase...

Effect of Annealing Temperature on Phase Transition of Nanoalumina Synthesized by Auto-Combustion Route

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Abstract:

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.

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Journal of Nano Research Vol. 41

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Periodical:

Journal of Nano Research (Volume 41)

Pages:

74-86

DOI:

https://doi.org/10.4028/www.scientific.net/JNanoR.41.74

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Online since:

May 2016

Authors:

Muhammad Adil*, Hasnah Mohd Zaid, Kean Chuan Lee, Noor Rasyada Ahmad Latiff

Keywords:

Morphology, Nanoalumina, Phase Transition, Sol-Gel Auto-Combustion, Structural Characterization

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