Preparation and Characterization of (1 − x)MgO.xSrO.Al2O3 (x=0.3, 0.4, 0.5)by Co-precipitation method

Abstract

The current study deals with the preparation and characterization of (1-x)MgO.xSrO.Al2O3 (x=0.3,0.4,0.5) based compounds by using magnesium, strontium and aluminum nitrates as oxidizers and sodium hydroxide as a precursor with co-precipitation method. XRD, SEM and FTIR analysis were performed on the calcined powders to analyze the microstructure and the phase formation of the powders. Results from XRD show the formation of MgSrAl10O17 phase upon sintering the powder at 900°C for 3h. Formation of MgSrAl10O17 phase was also observed after controlled sintering of the powder sample at 1200°C with 3h. FTIR analysis shows that symmetric or antisymmetric bending of O-Al-O network. SEM analysis of the powder sample confirmed the formation of the nanosized (~20-50 nm) spherical particles. Calculated lattice parameter of MgSrAl10O17 showed good match with the standard lattice parameter(s). However, it was found with increasing x in (1-x)MgO.xSrO.Al2O3 (x =0.3, 0.4, 0.5), unit cell parameter a’ increases and ‘c’ decreases may induces lattice strain with the neighboring minor phase(s).