Abstract

Nanopowders of iron oxides were obtained by Solution Combustion Synthesis (SCS) method from sol-gel compositions containing iron nitrates and soluble organic reducing agents (glycine, urea, citric acid). The synthesis processes and their intensity depending on the type of fuel and fuel/oxidizer ratio (ϕ) were investigated. It was established that the combustion regime affects the phase formation of the obtained powders, their morphology, the color of the final Fe2O3 powders, dielectric properties and etc. It was shown that iron oxides with a preferred morphology and high dielectric properties (ε = 44.5 at ϕ = 0.6 vs ε = 4.0 at ϕ = 1.4 using urea as fuel) could be produced by the SCS method.

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