Influência do teor de Zn2+ nas características morfológicas e magnéticas de ferritas Mn1-xZnxFe2O4 sintetizados em grande escala por reação de combustão

This study aimed to evaluate the influence of Zn2+ in the morphological and magnetic characteristics of ferrites Mn1-xZnxFe2O4 (where x= 0.0, 0.35, 0.5 and 0.65 mol of Zn) synthesized by combustion reaction in a pilot scale with batches of 200 g/reaction. The samples were characterized by X-ray diffraction, scanning/transmission electron microscopy, and magnetic measurements. The results indicated that all compositions were single phase of ferrite; morphologically the addition of Zn to MnFe2O4 system caused a slight reduction in size of the agglomerates, and reduced the particle size, but this behavior was not linear with the Zn2+ content. The samples had characteristic magnetic behavior of soft magnetic materials, maximum saturation magnetization of 62 emu/g for the sample with lower zinc content in its composition.