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Permanent magnetic ferrite ball-milling and mixing preparation process
The invention discloses a permanent magnetic ferrite ball-milling and mixing preparation process. The preparation process comprises the following steps: mixing iron oxide red and barium carbonate according to a mass ratio of 4:1, adding an additive after mixing, and then pre-sintering in a kiln to form a permanent magnetic ferrite pre-sintered material; adding the permanent magnetic ferrite pre-sintered material into zirconium oxide balls and water, and mixing in a ball mill, wherein the ball milling time is 3-5 hours; and transferring the ball-milled material into a secondary ball mill by using compressed air for ball milling. The preparation method is simple and easy to implement, the production cost is low, the addition of calcium gluconate is beneficial to improving the particle size distribution of the slurry in the ball milling process, and meanwhile, the orientation of particles in the forming stage is improved, so that the residual magnetism and the intrinsic coercive force of the material are improved. The added metal chromium powder has a fluxing effect, so that the sintering temperature can be effectively reduced. The mixing probability and the mixing amount of iron impurities can be reduced through a graded ball milling mode, different ball milling speeds are adopted, the particle size distribution tends to be normal distribution, and the magnetism of the permanent magnetic ferrite is effectively improved.
本发明公开了一种永磁氧体球磨混料制备工艺包含以下步骤：按照氧化铁红与碳酸钡按照质量4:1的比例混合，混合后加入添加剂，然后在窑炉中进行预烧形成永磁铁氧体预烧料；将永磁铁氧体预烧料加入氧化锆球和水到球磨机中混合，球磨时间3‑5h；球磨后的物料用压缩空气转入二级球磨机进行球磨。本发明制备方法简单易行，生产成本低，葡萄糖酸钙的添加有助于改善球磨过程中料浆的粒度分布，同时改善成型阶段颗粒的取向性，从而提高材料的剩磁和内禀矫顽力。添加的金属铬粉具有助熔作用，可以有效降低烧结温度。分级球磨的方式，能够减少铁杂质混入的概率和混入量，采用不同的球磨速度，使粒度分布趋于正太分布，有效的提高了永磁氧体的磁性。
Permanent magnetic ferrite ball-milling and mixing preparation process
The invention discloses a permanent magnetic ferrite ball-milling and mixing preparation process. The preparation process comprises the following steps: mixing iron oxide red and barium carbonate according to a mass ratio of 4:1, adding an additive after mixing, and then pre-sintering in a kiln to form a permanent magnetic ferrite pre-sintered material; adding the permanent magnetic ferrite pre-sintered material into zirconium oxide balls and water, and mixing in a ball mill, wherein the ball milling time is 3-5 hours; and transferring the ball-milled material into a secondary ball mill by using compressed air for ball milling. The preparation method is simple and easy to implement, the production cost is low, the addition of calcium gluconate is beneficial to improving the particle size distribution of the slurry in the ball milling process, and meanwhile, the orientation of particles in the forming stage is improved, so that the residual magnetism and the intrinsic coercive force of the material are improved. The added metal chromium powder has a fluxing effect, so that the sintering temperature can be effectively reduced. The mixing probability and the mixing amount of iron impurities can be reduced through a graded ball milling mode, different ball milling speeds are adopted, the particle size distribution tends to be normal distribution, and the magnetism of the permanent magnetic ferrite is effectively improved.
本发明公开了一种永磁氧体球磨混料制备工艺包含以下步骤：按照氧化铁红与碳酸钡按照质量4:1的比例混合，混合后加入添加剂，然后在窑炉中进行预烧形成永磁铁氧体预烧料；将永磁铁氧体预烧料加入氧化锆球和水到球磨机中混合，球磨时间3‑5h；球磨后的物料用压缩空气转入二级球磨机进行球磨。本发明制备方法简单易行，生产成本低，葡萄糖酸钙的添加有助于改善球磨过程中料浆的粒度分布，同时改善成型阶段颗粒的取向性，从而提高材料的剩磁和内禀矫顽力。添加的金属铬粉具有助熔作用，可以有效降低烧结温度。分级球磨的方式，能够减少铁杂质混入的概率和混入量，采用不同的球磨速度，使粒度分布趋于正太分布，有效的提高了永磁氧体的磁性。
Permanent magnetic ferrite ball-milling and mixing preparation process
一种永磁氧体球磨混料制备工艺
CAO HAIRONG (author) / GUAN QUN (author) / MA XIAOLONG (author)
2021-06-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Ball-milling and mixing preparation process and use method for permanent magnetic ferrite
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