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A kind of bonded NdFeB magnet and preparation method thereof

A neodymium iron boron and magnet technology, applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem of low efficiency of the preparation process, and achieve the effect of improving product consistency, high density and reducing production costs

Active Publication Date: 2020-08-18
麦格昆磁磁性材料(滁州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of the low efficiency of the existing bonded NdFeB magnet powder preparation process, a new bonded NdFeB magnet solution is needed

Method used

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  • A kind of bonded NdFeB magnet and preparation method thereof
  • A kind of bonded NdFeB magnet and preparation method thereof
  • A kind of bonded NdFeB magnet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] The bonded NdFeB magnet provided in this example is composed of the following components by weight:

[0066] NdFeB magnetic powder 95 parts;

[0067] 1.5 parts of thermosetting adhesive W-6C;

[0068] Silane coupling agent KH-5500.3 parts;

[0069] Zinc stearate 0.1 part.

[0070] And the particle size of the binder powder in this example is 250 mesh.

[0071] In this example, the preparation of bonded NdFeB magnets is completed through the following process:

[0072] (1) Crushing the required NdFeB magnetic powder through a 200-mesh sieve;

[0073] (2) Add 95 parts of sieved NdFeB magnetic powder and 1.5 parts of powdery thermosetting binder W-6C into the mixing equipment and stir evenly, then pass 5 parts of acetone solution with 0.2 parts of coupling agent through the mist Chemical equipment is evenly sprayed onto the surface of the mixture of magnetic powder and thermosetting adhesive to make rubber powder;

[0074] (3) Gained rubber powder and 0.1 part of zin...

example 2

[0079] The bonded NdFeB magnet provided in this example is composed of the following components by weight:

[0080]

[0081] And the particle size of the binder powder in this example is 300 mesh.

[0082] In this example, the preparation of bonded NdFeB magnets is completed through the following process:

[0083] (1) Crushing the required NdFeB magnetic powder through a 300-mesh sieve;

[0084] (2) Add 96 parts of sieved NdFeB magnetic powder and 2 parts of powdery thermosetting binder W-6C into the mixing equipment and stir evenly, then pass 6 parts of acetone solution with 0.4 parts of coupling agent through the mist Chemical equipment is evenly sprayed onto the surface of the mixture of magnetic powder and thermosetting adhesive to make rubber powder;

[0085] (3) Gained rubber powder and 0.2 part of calcium stearate are evenly combined to obtain a magnetic powder mixture;

[0086] (4) putting the obtained magnetic powder mixture into a mold and pressing to obtain a ...

example 3

[0090] The bonded NdFeB magnet provided in this example is composed of the following components by weight:

[0091]

[0092]

[0093] And the particle size of the binder powder in this example is 300 mesh.

[0094] In this example, the preparation of bonded NdFeB magnets is completed through the following process:

[0095] (1) Crushing the required NdFeB magnetic powder through a 400-mesh sieve;

[0096] (2) Add 97 parts of sieved NdFeB magnetic powder and 2.5 parts of powdery thermosetting binder W-6C into the mixing equipment and stir evenly, then pass 7 parts of acetone solution with 0.5 parts of coupling agent through the mist Chemical equipment is evenly sprayed onto the surface of the mixture of magnetic powder and thermosetting adhesive to make rubber powder;

[0097] (3) Gained rubber powder and 0.4 part of calcium stearate are evenly combined to obtain a magnetic powder mixture;

[0098] (4) putting the obtained magnetic powder mixture into a mold and pressin...

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Abstract

The invention discloses a bonded neodymium iron boron magnet and a preparation method. According to the characteristic of quick dissolution of microparticle adhesive powder, the adhesive powder is mixed with magnetic powder, and then a solvent is uniformly atomized and sprayed to the magnetic powder and adhesive particles; in a stirring process, surface modification of the magnetic powder is realized by a coupling agent in the solvent, and then the adhesive uniformly coats the surface of the magnetic powder along with dissolution of the adhesive. By adoption of the method, uniformity in surface dispersion of the rubber powder adhesive and the magnetic powder and high bonding force between magnetic powder and between the magnetic powder and the adhesive are realized, granulated rubber powder particles are high in uniformity, and powder fluidity and strength uniformity can be greatly improved. Since the adhesive does not need to be dissolved into the solvent in advance, operating efficiency and component proportioning precision are greatly improved.

Description

technical field [0001] The invention relates to a bonded NdFeB magnet, in particular to a method for preparing magnetic powder for the bonded NdFeB magnet. Background technique [0002] Bonded NdFeB magnets have the characteristics of good formability, high dimensional accuracy, good uniformity of magnetic properties, large degree of shape freedom, high motor efficiency, etc., and are widely used in electronic computers, household appliances, office equipment, automobiles and other fields. [0003] Usually the preparation of bonded NdFeB magnet powder generally adopts the following process steps: [0004] 1. The particle size of the magnetic powder is selected, and the magnetic powder is crushed to the particle size required by the process; [0005] 2. Prepare the adhesive and acetone in a certain proportion to make a solution in advance; [0006] 3. Add the magnetic powder into the mixing equipment and stir for a certain period of time, then add the binder solution into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F1/0578H01F41/0253H01F41/0266
Inventor 高庆国杨友文陈宇凡
Owner 麦格昆磁磁性材料(滁州)有限公司
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