Flexible neodymium-iron-boron magnet as well as preparation method and application thereof

A NdFeB magnet technology, applied in the field of flexible NdFeB magnets and its preparation, can solve the problems of magnetic powder falling off, easy to break, poor toughness, etc., and achieve the effects of reducing magnetic performance, easy orientation, and low viscosity

Pending Publication Date: 2021-03-26
GUANGZHOU GOLDEN SOUTH MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the thickness of the NdFeB material is reduced, it is prone to problems such as poor magnetic properties, poor toughness, easy fracture, and magnetic powder is easy to fall off the surface of the film. It is urgent to develop a high-performance ultra-thin flexible NdFeB magnet

Method used

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  • Flexible neodymium-iron-boron magnet as well as preparation method and application thereof
  • Flexible neodymium-iron-boron magnet as well as preparation method and application thereof

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preparation example Construction

[0055]The present invention provides a method of preparing a flexible NdFe boron magnet, comprising the steps of:

[0056]1) Sie grading of NdFeB magnetic powder with a fluid spiral screening of 180.

[0057]2) Take the 180 mesh of NdFe-boron magnetic powder in step 1) to the closed stirring tank, and an aluminate coupling agent is added, and stirred at 50 to 60 Hz frequencies 30 to 35 min.

[0058]3) Take step 2) Treatment of NdFeB magnetic powder, together with rubber and excipients, put into the unfaming machine under circulation of inert gas (preferably nitrogen) protection, each raw material is 85% ~ 95 of magnetic powder 85% ~ 95 %, Rubber 2.5% ~ 9%, excipients 2.5% ~ 6%. The penetration time is about 12 to 15 min, and the penetration temperature is 120 to 130 ° C.

[0059]4) Take step 3) The medium-sidedly refined material is opened for 2 to 3 min in the preheated mold (60 ~ 80 ° C), and the material on the open mill is flattened in the ventilation of 3 to 4 h.

[0060]5) Take the material ...

Embodiment 1

[0066]A flexible NdFeB magnet, the composition of the raw material is shown in the following table:

[0067]Table 1. Flexible NdFeB magnets

[0068]

[0069]The method of preparing the flexible NdFeB magnet comprises the steps of:

[0070]1) Sie grading of NdFeB magnetic powder with a fluid spiral screening of 180.

[0071]2) Take 180 目 目 旋,, 入 剂 剂 剂 剂 剂 剂 剂 剂 剂 剂 剂 偶 剂 偶 剂 剂 剂 剂 剂 剂 剂 剂 剂

[0072]3) Take the step 2) Treatment of NdFeB magnetic powder, with rubber and remaining excipients to put into the unfaming machine under a circulation of nitrogen protection. The penetration time is about 13 min, and the high refining temperature is 125 ° C.

[0073]4) Repairing the refined material is opened for 2.5 min on the open mill that has been preheated to 65 ° C, and the material on the open mill is flattened in the ventilation of 3 hours.

[0074]5) Take step 4) After the material is re-extracting it to 90 ° C, it is broken with a crusher, and then the crushing pellets are pulled into 2.5 mm sheet.

[0075]6) T...

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Abstract

The invention discloses a flexible neodymium-iron-boron magnet as well as a preparation method and application thereof. The preparation method of the flexible neodymium-iron-boron magnet comprises thefollowing steps: mixing neodymium-iron-boron magnetic powder, rubber and auxiliary materials; crushing and tabletting the mixed material to obtain a sheet; carrying out heating and magnetic field orientation on the sheet; and calendering, vulcanizing and carrying out surface treatment to obtain the flexible neodymium-iron-boron magnet. Magnetic field orientation is carried out on the high-temperature neodymium-iron-boron sheet by heating the sheet, the magnetic performance of the flexible neodymium-iron-boron magnet can be effectively improved, and the obtained flexible neodymium-iron-boron magnet has good magnetic performance, mechanical performance and corrosion resistance.

Description

Technical field[0001]The present invention relates to the field of magnet manufacturing, and more particularly to a flexible NdFeB magnet and a preparation method thereof.Background technique[0002]Flexible NdFeB magnets are mainly made of NDFEB magnetic powder and adhesive, with high residual magnetic, high coercivity, high magnetic energy, high performance ratio, etc., easy to process various sizes and minimum specifications. With a sintered magnetic comparison, the flexible NdFeB magnet can be formed once, no secondary processing, can be made into a variety of complicated magnets, which can greatly reduce the volume and weight of the motor. Flexible NdFeB magnets are mainly used in office automation equipment, electricity machinery, audiovisual equipment, instrumentation, small motor and metering machinery, mobile phones, CD-ROM, DVD-ROM drive motor, hard disk spindle motor HDD, other micride DC motor And automation instrumentation and other fields. In recent years, electronic pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F41/026H01F41/0266H01F1/0578
Inventor 饶钦盛汪俊晖徐各清张莉
Owner GUANGZHOU GOLDEN SOUTH MAGNETIC MATERIAL
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