Characterization of Magnesium/Barium Aluminates Spinel Synthesized by Sol-Gel Auto-Combustion Method
| Authors | K. Mahi1,2 , R. Mostefa1 |
| Affiliations |
1Department of Physics, Faculty of Matter Sciences, University of Tiaret, BP P 78 Zaaroura, Tiaret, Algeria 2Laboratory of Plasma Physics, Conductor Materials and their Applications, Faculty of Physics, Oran University of Sciences and Technology Mohamed Boudiaf USTO-MB, BP1505 Oran, Algeria |
| Е-mail | khaled.mahi@univ-tiaret.dz |
| Issue | Volume 14, Year 2022, Number 2 |
| Dates | Received 11 March 2022; revised manuscript received 25 April 2022; published online 29 April 2022 |
| Citation | K. Mahi, R. Mostefa, J. Nano- Electron. Phys. 14 No 2, 02025 (2022) |
| DOI | https://doi.org/10.21272/jnep.14(2).02025 |
| PACS Number(s) | 81.20.Ka, 81.07.Wx, 81.05.Je |
| Keywords | Magnesium aluminate, Barium aluminate, Spinel structure, Sol-gel method (4) , Powder synthesis, Nanostructures (8) . |
| Annotation |
Nanocrystalline magnesium/barium aluminates powder was prepared by a sol-gel auto-combustion method from Al, Mg and Ba nitrates. Mg and Ba elements are among the potential candidates for various applications due to their flexibility, abundance and excellent electromagnetic performance. The phase transformation, crystal structure, functional groups, bonds in the structure and optical properties of the obtained powders were determined by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR) and UV-visible spectroscopy. The electronic band gaps of MgAl2O4 and BaAl2O4 calculated using the Tauc method are shown to remain largely unchanged as X (Mg or Ba) is substituted into the lattice, forming XAl2O4, but increase greater than 0.05 eV for MgAl2O4. The X-ray diffraction results reveal that with the X-substitution the crystallite size, cell volume and lattice parameter increase. The incorporation of magnesium and barium atoms into XAl2O4 is confirmed by the FTIR spectroscopy. The results show that MgAl2O4 and BaAl2O4 spinels can be obtained by sol-gel auto-combustion method at room temperatures (300 K), resulting in a material with high purity and large surface area. |
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List of References |
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