Inversion defects in MgAl_2O_4 elaborated by pressureless sintering, pressureless sintering plus hot isostatic pressing, and spark plasma sintering

摘要

The distribution of inversion defects of Al was investigated in dense magnesium-aluminate spinel elaborated by pressureless sintering, pressureless sintering plus hot isostatic pressing, and spark plasma sintering. This study was conducted by energy electron loss spectroscopy analyses and more particularly by energy loss near edge structure investigations of the Al-L_(2,3) edge. Several aspects are discussed with the purpose of understanding why charged defects dispersal reveals a special configuration.