Synthesis of magnetic manganese ferrite

Abstract

MnFe₂O₄ polycrystalline powders were prepared by the chemical coprecipitation method. When the reaction temperature is above 80°C, through depositing and washing, the MnFe₂O₄ can be obtained directly without calcining. However, when it is below 80°C, we have to calcine the precursor in order to obtain MnFe₂O₄, which does not result in pure spinal structure but a mixture of MnFe₂O₄ and α-Fe₂O₃. The powders’ magnetic property was characterized with a Vibrating Sample Magnetometer. The phase structure, crystal size and lattice constant were presented by an X-ray diffractometer. In addition, the morphology of the powder was observed with a scan electron microscope and a transmission electron microscope.

Keywords

polycrystalline powders / chemical coprecipitation method / calcine

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