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Chemical Synthesis of Nanocrystalline Magnesium Aluminate Spinel Using Egg White

Magnesium aluminate spinel (MgAl204) is a well-known mineral usually used as a refractory material. Indeed, its high melting temperature (2135°C), good chemical inertness, high mechanical strengths both at room temperature and at elevated temperatures, as well as its high resistance to radiation give this material very attractive properties and applications. Nanocrystalline MgAl204 spinel powder synthesized using metal nitrates and a polymer matrix precursor composed of egg white. The precursor and the calcined powders were characterized by simultaneous thermal analysis, X-ray diffraction, scanning electron microscopy. According to X-ray results, the inceptive formation temperature of spinel via this technique was between 800°C and 900°C. The calcined powder at 900°C for 2h has spherical morphology with particle sizes about 60nm.