Material for high superposition of manganese-zinc ferrite core and preparation method thereof
A technology of manganese-zinc ferrite and high superposition is applied in the field of materials for high-superposition manganese-zinc ferrite cores and their preparation, and can solve the problem of low magnetic permeability at room temperature, which cannot meet the requirements of superimposed inductance of power transformers, and cannot meet the requirements of superimposed inductance of power transformers. requirements and other issues, to achieve the effect of optimizing the preparation process, reducing industrial processing costs, large-scale production, and high stacking characteristics
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[0029] Example one
[0030] In order to improve the high superposition and high inductance of Mn-Zn ferrite cores, Fe must be increased 2 O 3 And ZnO composition content, due to Fe 2 O 3 The increase of the content will greatly increase the power loss. Based on the composition of the SJ1.8K Mn-Zn ferrite core, we have determined the main composition of a high-stacked Mn-Zn ferrite core material Composition: Fe 2 O 3 53.3mol%, MnO 38.2mol% and ZnO 8.5mol%; the Fe 2 O 3 The purity is above 99.5%, the specific surface area is 4.0m 2 / g above; the purity of the MnO is above 99.7%, and the specific surface area is 10-15m 2 / g.
[0031] Firstly, the weight of various raw materials is calculated by converting into weight percentage; then, the ingredients are weighed to obtain the powder; the powder is pressed into the pre-burning furnace by red vibration, and the pre-burned material is obtained. Among them, The pre-sintering temperature is 950℃; the pre-sintered material is vibrated and ...
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[0035] Example two
[0036] In order to further increase the superimposed inductance of this manganese-zinc ferrite core, Co is added under the premise that the basic composition of the core remains unchanged. 2 O 3 And TiO 2 , The specific method is: a high-stacked manganese-zinc ferrite core material, including the following main components calculated in mole percentage:: Fe 2 O 3 53.3mol%, MnO 38.2mol% and ZnO 8.5mol%; the Fe 2 O 3 The purity is above 99.5%, the specific surface area is 4.0m 2 / g above; the purity of the MnO is above 99.7%, and the specific surface area is 10-15m 2 / g; It further includes the following additives calculated in mole percentage: Co 2 O 3 0.15mol% and TiO 2 0.1mol%.
[0037] Firstly, the weight of various raw materials is calculated by converting into weight percentage; then, the ingredients are weighed to obtain the powder; the powder is pressed into the pre-burning furnace by red vibration, and the pre-burned material is obtained. Among them, Th...
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[0041] Example three
[0042] Because the Fe in this manganese-zinc ferrite core 2 O 3 Higher content, then add a certain amount of Co 2 O 3 , Resulting in an increase in the power consumption of the magnetic core. In order to change this situation, we have added beneficial impurities to the composition of the magnetic core, CaCO 3 , SiO 2 , Nb 2 O 5 , ZrO 2 , In order to suppress the excessive growth of crystal grains to increase the resistivity of the magnetic core and improve the power consumption, the specific method is: a high-superimposed manganese-zinc ferrite core material, including the following main components calculated in mole percentage: Fe 2 O 3 53.3mol%, MnO 38.2mol% and ZnO 8.5mol%; the Fe 2 O 3 The purity is above 99.5%, the specific surface area is 4.0m 2 / g above; the purity of the MnO is above 99.7%, and the specific surface area is 10-15m 2 / g; It further includes the following additives calculated in mole percentage: Co 2 O 3 0.15mol%, TiO 2 0.1mol%, CaCO 3...
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