Permanent magnetic ferrite production method and magnetic body thereof
A permanent magnet ferrite and a production method technology, applied in the field of permanent magnet ferrite, can solve the problems of low utilization value and production of high-performance permanent magnet ferrite, and achieve easy popularization and application, improvement of market competitiveness, and simple preparation process Effect
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Embodiment 1
[0038] Weigh the containing Sr 0.8 La 0.2 Fe 11.8 co 0.2 o 19 700kg of permanent magnet ferrite primary pre-fired powder which is the main phase of ferrite and 300kg of recycled permanent magnet ferrite grinder material with the same main phase of the pre-fired material, add 3.5kg SiO 2 , 8.0kg CaCO 3 , 6.0kg calcium gluconate, 2.8kg La 2 o 3 , 2.8kgCo 2 o 3 Put the mixture into a ball mill, add appropriate deionized water as a ball milling medium for grinding, the grinding time is 15 hours, and the average particle size of the slurry after ball milling is 0.75um.
[0039] After wet pulverization, centrifugal dehydration is carried out to the slurry for forming, the concentration of the slurry is adjusted to a solid content of 65wt%, and then formed, while pressing, a forming magnetic field of 10000Gs is applied in the pressing direction. The obtained molded body was a cylinder with a diameter of 43.2 mm and a height of 13 mm, and the molding pressure was 10 MPa.
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Embodiment 2
[0050] Weigh the containing Sr 0.8 La 0.2 Fe 11.8 co 0.2 o 19 600kg of permanent magnet ferrite primary pre-fired powder which is the main phase of ferrite and 400kg of permanent magnet ferrite recycling grinding machine material with the same main phase of the pre-fired material, add 3.0kg SiO 2 , 6.84kg CaCO 3 , 6.0kg of calcium gluconate, 2.4kg of La 2 o 3 , 2.4kgCo 2 o 3 Put the mixture into a ball mill, add appropriate deionized water as a ball milling medium for grinding, the grinding time is 14 hours, and the average particle size of the slurry after ball milling is 0.73um.
[0051] After wet pulverization, centrifugal dehydration is carried out to the slurry for forming, the concentration of the slurry is adjusted to a solid content of 65wt%, and then formed, while pressing, a forming magnetic field of 10000Gs is applied in the pressing direction. The obtained molded body was a cylinder with a diameter of 43.2 mm and a height of 13 mm, and the molding pressure...
Embodiment 3
[0056] Weigh the containing Sr 0.8 La 0.2 Fe 11.8 co 0.2 o 19 750kg of permanent magnet ferrite primary pre-fired powder which is the main phase of ferrite and 250kg of permanent magnet ferrite recycled material grinder material, ball mill leakage and cracking product magnetic powder mixture with the same main phase of the pre-fired material, add 3.0kg SiO 2 , 6.0kg CaCO 3 , 6.0kg calcium gluconate, 2.25kg La 2 o 3 , 1.5kgCo 2 o 3 Put the mixture into a ball mill, add appropriate deionized water as a ball milling medium for grinding, the grinding time is 15 hours, and the average particle size of the slurry after ball milling is 0.75um.
[0057] After wet pulverization, centrifugal dehydration is carried out to the slurry for forming, the concentration of the slurry is adjusted to a solid content of 65wt%, and then formed, while pressing, a forming magnetic field of 10000Gs is applied in the pressing direction. The obtained molded body was a cylinder with a diameter ...
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Abstract
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