A kind of low magnetic permeability ferrite magnetic medium material, its preparation method and application
A technology of magnetic medium and low magnetic permeability, applied in the direction of magnetic materials, inductor/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of difficult magnetic permeability and achieve high insulation resistance
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Embodiment 1
[0029] A low magnetic permeability ferrite magnetic medium material, the specific composition percentages are: main component content: NiO 0.65mol%, ZnO 42.00mol%, CuO 11.00mol%, Fe 2 O 3 46.35mol%; Auxiliary component content: Co 2 O 3 0.25wt%, MnCO 3 0.20wt%, Bi 2 O 3 0.60wt%.
[0030] The preparation method is as follows:
[0031] First of all, the high-frequency vibration mixing system is used to effectively improve the mixing uniformity of the oxides of the raw materials, achieve high-speed crushing effect, complete the dry mixing, and control the mixing time to 70 minutes;
[0032] Then, further use a sintering kiln for pre-sintering, and control the pre-sintering temperature to be 890°C;
[0033] Further, the large flow circulating sand mill wet abrasive (primary abrasive for 4 hours, secondary fine abrasive for 5 hours) is used to refine the powder particles to improve the activity of the powder, reduce the activation energy of the reaction and effectively redu...
Embodiment 2
[0036] A low magnetic permeability ferrite magnetic medium material, the specific composition percentages are: main component content: NiO 0.60mol%, ZnO 43.00mol%, CuO 10.50mol%, Fe 2 O 3 45.90mol%; Auxiliary component content: Co 2 O 3 0.21wt%, MnCO 3 0.25wt%, Bi 2 O 3 0.55wt%.
[0037] The preparation method is as follows:
[0038] First, the high-frequency vibration mixing system is used to effectively improve the mixing uniformity of the oxides of each raw material, achieve high-speed crushing effect, complete dry mixing, and control the mixing time to 65 minutes;
[0039] Then, further use a sintering kiln for pre-sintering, and control the pre-sintering temperature to be 885°C;
[0040] Further, the large flow circulating sand mill wet abrasive (primary abrasive for 4 hours, secondary fine abrasive for 4.5 hours) is used to refine the powder particles to improve the activity of the powder, reduce the activation energy of the reaction and effectively reduce the sin...
Embodiment 3
[0043] A low magnetic permeability ferrite magnetic medium material, the specific composition percentages are: main component content: NiO 0.50mol%, ZnO 43.50mol%, CuO 10.00mol%, Fe 2 O 3 46.00mol%; Auxiliary component content: Co 2 O 3 0.20wt%, MnCO 3 0.30wt%, Bi 2 O 3 0.50wt%.
[0044] The preparation method is as follows:
[0045] First, the high-frequency vibration mixing system is used to effectively improve the mixing uniformity of the oxides of the raw materials, achieve high-speed crushing effect, complete dry mixing, and control the mixing time to 60 minutes;
[0046] Then, further use a sintering kiln for pre-sintering, and control the pre-sintering temperature to be 880°C;
[0047] Further, the wet abrasives of the large-flow circulating sand mill (primary abrasive for 4 hours and secondary fine abrasive for 4 hours) are used to refine the powder particles to improve the activity of the powder, reduce the activation energy of the reaction and effectively redu...
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