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Preparation method of flexible anisotropy bonding rare earth permanent magnet material

An anisotropic magnetic and anisotropic technology, which is applied in the fields of magnetic materials, inorganic material magnetism, inductor/transformer/magnet manufacturing, etc., can solve the problems of complicated preparation process, increased production cost, and unguaranteed orientation effect, and achieves the goal of manufacturing Simple process, strong corrosion resistance, high anisotropy effect

Inactive Publication Date: 2011-09-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the calendering process is separated from the magnetic field orientation process, the extrusion process is introduced, and the magnetic field orientation is carried out simultaneously with the extrusion process. On the one hand, the orientation effect cannot be guaranteed; on the other hand, the entire preparation process is too complicated, which increases the production capacity. cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The weight percentages of various components of the magnet formula are: HDDR anisotropic NdFeB magnetic powder 94.5%, chlorinated polyethylene 4.8%, silane coupling agent 0.2%, phthalate plasticizer 0.2%, stearin Salt lubricant 0.2%, silica heat stabilizer 0.1%. Mix the above components evenly with a kneader, then put the mixture into a calender at 85°C and calender it into a sheet-shaped flexible bonded magnet. During calendering, N 2 as a protective atmosphere. Then heat the sheet-shaped flexible bonded magnet as a whole or cut into parts to 100°C and keep it warm for 30 minutes. After the heating and heat preservation are completed, it is immediately placed in an orientation magnetic field with a magnetic field strength of 20,000 Oe for orientation with a temperature-accompanied magnetic field. Finally, a flexible anisotropic NdFeB bonded magnet with a thickness of 2mm was prepared, with anisotropy DOA=0.4 and irreversible loss h irr =0.22, the maximum magnetic en...

Embodiment 2

[0027] The weight percentages of various components of the magnet formula are: HDDR anisotropic NdFeB magnetic powder 94.5%, chlorinated polyethylene 4.8%, silane coupling agent 0.2%, phthalate plasticizer 0.2%, stearin Salt lubricant 0.2%, silica heat stabilizer 0.1%. Mix the above components evenly with a kneader, then put the mixture into a calender at 85°C and calender it into a sheet-shaped flexible bonded magnet. During calendering, N 2 as a protective atmosphere. Then heat the sheet-shaped flexible bonded magnet as a whole or cut into parts to 130° C., and keep it warm for 30 minutes. After the heating and heat preservation are completed, it is immediately placed in an orientation magnetic field with a magnetic field strength of 20,000 Oe for orientation with a temperature-accompanied magnetic field. Finally, a flexible anisotropic NdFeB bonded magnet with a thickness of 2mm was prepared, with anisotropy DOA=0.72 and irreversible loss h irr =0.35, the maximum magneti...

Embodiment 3

[0029] The weight percentages of various components of the magnet formula are: HDDR anisotropic NdFeB magnetic powder 94.5%, chlorinated polyethylene 4.8%, silane coupling agent 0.2%, phthalate plasticizer 0.2%, stearin Salt lubricant 0.2%, silica heat stabilizer 0.1%. Mix the above components evenly with a kneader, then put the mixture into a calender at 85°C and calender it into a sheet-shaped flexible bonded magnet. During calendering, N 2 as a protective atmosphere. Then heat the sheet-shaped flexible bonded magnet as a whole or cut into parts to 100°C and keep it warm for 30 minutes. When the heating and heat preservation are completed, it is immediately placed in an orientation magnetic field with a magnetic field strength of 50,000 Oe for orientation with a temperature-accompanied magnetic field. Finally, a flexible anisotropic NdFeB bonded magnet with a thickness of 2mm was prepared, with anisotropy DOA=0.75 and irreversible loss h irr =0.22, the maximum magnetic en...

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Abstract

The invention discloses a preparation method of flexible anisotropy bonding rare earth permanent magnet material, belonging to the field of magnetic materials. The material is prepared by combining the two-step approach accompanying temperature magnetic field orientation technology of which the calendaring process and the accompanying temperature magnetic field orientation process are separated. A certain quantity of anisotropy magnetic powder which is performed with surface treatment by the processing agent in advance, binder and processing agent are evenly mixed; the mixed material is calendered into flaky flexible bonding magnetic body by the calendaring technology; then, the flaky flexible bonding magnetic body is cut into parts which are heated at certain temperature under the condition of heat preservation for certain time, after that, the obtained product is put into an orientation magnetic field for accompanying temperature magnetic field orientation; and the direction of the orientation magnetic field is parallel to the plane normal direction of the flaky flexible bonding magnetic body. In the preparation technology, magnetic powder can overcome the constraint of a bonding system and rotates under the action of magnetic field force to ensure that the direction of easy magnetization of the magnetic powder generally points to the orientation direction, and the magnetic property of prepared flexible anisotropy bonding rare earth permanent magnet material can be greatly improved.

Description

Technical field [0001] The invention belongs to the field of magnetic materials, and relates to a preparation method of a flexible anisotropic bonded rare earth permanent magnet material. Background technique [0002] The flexible bonded rare earth permanent magnet material is prepared from magnetic powder, binder and a small amount of processing aids through the production process of rubber products. It has good flexibility and magnetic properties; it is easy to transport and assemble; the size can be adjusted Through arbitrary adjustment of cutting, the product shape is diversified; no mold is needed, the production process is short, the efficiency is high, and the processing cost is low; the side material can be completely recycled, and the energy consumption is low. [0003] Flexible bonded rare earth permanent magnet materials can be divided into two categories: flexible isotropic bonded rare earth permanent magnets and flexible anisotropic bonded rare earth permanent m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/08H01F1/053B22F3/02H01F41/02
Inventor 孙爱芝翟福强王琎吴深袁多
Owner UNIV OF SCI & TECH BEIJING
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