Effect of Annealing Temperature on Phase Transition of Nanoalumina Synthesized by Auto-Combustion Route
| Autor: | Keanchuan Lee, Hasnah Mohd Zaid, Noor Rasyada Ahmad Latiff, Muhammad Adil |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Thermogravimetric analysis
Materials science Analytical chemistry Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nanocrystalline material 0104 chemical sciences Amorphous solid Crystallography Crystallinity Electron diffraction Crystallite Selected area diffraction 0210 nano-technology |
| Zdroj: | Journal of Nano Research. 41:74-86 |
| ISSN: | 1661-9897 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|