Síntese pelo método da combustão e caracterização estrutural por difração de raios x de óxidos de ferro (fe2o3) e alumínio (al2o3)

Abstract

Nanometric materials are modern and of varying applicability in the case of iron oxide (Fe2O3) and aluminum oxide (Al2O3) nanoparticles used in various applications, such as catalytic processes, electronic and biomedical components. The properties of nanoparticles can be influenced by the synthesis method. Iron and aluminum oxides were synthesized by the solution combustion method, using the percussors, iron nitrates and aluminum chloride as fuel: urea (CH4N2O) and citric acid (C6H8O7) and heat treated for 8 hours at a temperature 300 ° C. The samples were characterized by X-ray diffraction and the Rietveld method was applied for parameter refinement and crystal structure information and oxide phase quantification. The crystallite size was calculated using the Scherrer equation and the Rietveld refinement was worked using the DBWS Tools 2.4 software. The iron oxide phase Fe2O3 was obtained using urea, in the use of citric acid there was the presence of magnetite (Fe3O4). The Al2O3 phase could not be reached with the use of the urea and citric acid fuels, the heat treatment applied to Al2O3 nanoparticles did not influence significantly, not corroborating the single formation of Fe2O3 phase and the formation of Al2O3.