Synthése du spinelle mgaio par méthode chimique

Abstract

In this work, we synthesized the magnesium aluminate spinel powder MgAl2O4 via the Sol/Gel chemical pathway using two methods. The characterization focuses on X-ray diffractometry (XRD), thermogravimetry (ATG), Fourier transform infrared spectroscopy (FTIR) and SEM microscopic observations. This study aims to obtain spinel at low temperature, through two different methods from the same precursors: aluminum nitrates and magnesium nitrates (with the addition of acid nitric in the second method) and to conduct a comparative study between the synthesized powders. The results obtained show the formation of spinel at a calcination temperature of approximately 600°C. Thus, the stud y showed that the second method presents reaction residues which can be eliminated by increasing the calcination temperature. Finally, the microscopic observations disclosed that the two powders present an agglomerated and difficult to compare morphological state