Broadband high-impedance manganese-zinc ferrite material and preparation method thereof
A manganese-zinc ferrite, high-impedance technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of difficult to meet the use requirements, low Curie temperature, low low-frequency impedance, etc., to achieve Effects of low cost, high Curie temperature, and high DC resistivity
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[0026] Embodiment 1-4 and comparative example 1 are based on Fe 2 o 3 , Mn 3 o 4 , ZnO as the main component, ferrite materials obtained by adding different amounts of each main component, placed in a ball mill and mixed for 0.5 hours, then taken out and dried. The obtained powder was pre-fired at 900°C for 2.5 hours in a box-type resistance furnace. Then put the pre-fired powder into a ball mill, based on the total weight of the main component, add an auxiliary component to the resulting powder: 0.008wt% SiO 2 , 0.02wt% CaCO 3 , 0.30wt% Co 2 o 3 ; Then add 50wt% deionized water and 1.5wt% dispersant to account for the total weight of the main component and carry out ball milling together. Ball mill the powder until the average particle size is about 1.0±0.2 μm; based on the total weight of the powder after ball milling, add 7wt% polyvinyl alcohol solution to the powder, mix uniformly and granulate, and press the granules into A circular sample of OR25×8-15mm. Finally...
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