Synthesis and characterization of LaAlO3 nanopowders by emulsion combustion method

Pure LaAlO3 nanopowders were synthesized using a emulsion precursor derived from a mixed-metal and oleic acid solution. The precursors and derived oxide powders were characterized by differential thermal analysis, thermo gravimetric analysis, infrared spectroscopy, X-ray diffraction and transmission electron microscopy. Pure LaAlO3 phase was synthesized at 800 °C for 2 h in air directly from amorphous precursors, without the formation of intermediate phase. The average particle size as determined from TEM is 60 nm. The FTIR analysis was carried to monitor the elimination of oleic acid from emulsion-derived precursor and calcined powder.