Synthesis of Magnetic Manganese Ferrite

摘要

MnFe2 O4 polycrystalline powders were prepared by the chemical coprecipitation method. When the reaction temperature is above 80℃,through depositing and washing,the MnFe2 O4 can be obtained directly without calcining.However,when it is below 80℃,we have to calcine the precursor in order to obtain MnFe2 O4 ,which does not result in pure spinal structure but a mixture of MnFe2 O4 andα-Fe2 O3 .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.