Solution Combustion Synthesis of Spinel Magnesium Aluminate and its Characterization for High Temperature Applications

Solution combustion route was undertaken to synthesize phase pure spinel magnesium aluminate. High purity nitrate salt precursors were used in 2:1 molar ratio while citric acid was used as fuel and reducing agent for preparation after proper mixing of stoichometric salts and fuel agent. It was followed by drying at 80°C for 3-4 hours. Thermal analysis was carried to determine the crystallization formation of the phase. XRD analysis confirmed the phases developed after proper annealing at 650°C and 800°C for 5 hours. Morphology of the synthesized powders was analyzed using SEM while M-0 coordinations for bond formation were reported using FTIR spectra. EDX analysis confirmed the elements present in the synthesized material.