Abstract
Magnesium ferrites (MgFe2O4) are ceramic oxides with spinel-type crystalline structure; they have interesting technological properties. The aim of this study was to obtain nanostructured MgFe2O4 through solution combustion synthesis using iron nitrate and magnesium nitrate as precursors and glycine as fuel, without the necessity of subsequent heat treatments after synthesis. The temperature variation with respect to a sample with constant molar ratio was investigated. The crystallinity (phases present and crystallite size: estimated by single-line method) of the products obtained was determined by X-ray diffraction, the specific surface area by the nitrogen/helium adsorption method, the morphology by transmission electron microscopy, and magnetic measurements by a superconducting quantum interference device. The synthesis method facilitated the production of magnesium ferrite with crystallite sizes between 18 and 61 nm, and the magnetic hysteresis curves indicated a ferromagnetic behavior of the samples at room temperature.
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