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A kind of neodymium iron boron/ferrite composite flexible magnet and its preparation method

A composite flexible, neodymium-iron-boron technology, applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve the problems of magnetic powder and matrix compatibility, poor corrosion resistance of flexible magnets, etc., to achieve increased compatibility sexual effect

Active Publication Date: 2020-06-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: This patent aims to solve the problem of poor compatibility between the magnetic powder and the substrate during the manufacturing process of NdFeB flexible magnets and the poor corrosion resistance of the final flexible magnet. The invention provides a NdFeB / ferrite composite flexible Magnet and preparation method thereof to obtain a composite flexible magnet with excellent magnetic properties, good mechanical properties, good corrosion resistance, and good cost performance

Method used

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  • A kind of neodymium iron boron/ferrite composite flexible magnet and its preparation method
  • A kind of neodymium iron boron/ferrite composite flexible magnet and its preparation method
  • A kind of neodymium iron boron/ferrite composite flexible magnet and its preparation method

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Embodiment 1

[0024] The preparation method of NdFeB flexible magnet, its specific steps are as follows:

[0025] 1) Weigh out 1000g, 2000g, 3000g, 4000g NdFeB magnetic powder (200 mesh) on the balance;

[0026] 2) Weigh 1.5% of the mass of NdFeB magnetic powder magnetic powder modification solution (epoxy resin, aminopropyltriethylsilane (KH550) and dioctyl phthalate (DOP) according to the mass ratio of 2:1:2 The modified solution) is added to the magnetic powder, and fully stirred until the magnetic powder is completely wet and has no obvious agglomeration;

[0027] 3) Weigh 100g of chlorinated polyethylene (CPE130, Weihai Jinhong Polymer Co., Ltd.), respectively, into the above-mentioned static magnetic powder, and fully stir until there is no obvious white agglomeration;

[0028] 4) The mixed magnetic powder / chlorinated polyethylene mixture is pressed into tablets with an open mill, made into triangle bags, mixed evenly, and released into tablets;

[0029] 5) Put the magnetic sheet sm...

Embodiment 2

[0040] The preparation method of the high filling rate neodymium iron boron / ferrite composite flexible magnet of the present invention, its specific steps:

[0041] 1) Weigh out two groups of 2000g NdFeB magnetic powder with 200 meshes;

[0042] 2) Weigh 1.5% of the magnetic powder mass modification liquid (epoxy resin, aminopropyltriethylsilane (KH550) and dioctyl phthalate (DOP) according to the mass ratio of 2:1:2. Modified liquid) into the magnetic powder, fully stirred until the magnetic powder is completely wet without obvious agglomeration;

[0043] 3) Weigh 100g of chlorinated polyethylene respectively, add them to the above-mentioned static magnetic powder respectively, and fully stir until there is no obvious white agglomeration to obtain a magnetic powder / chlorinated polyethylene mixture;

[0044] 4) Weigh 500g and 1000g of strontium ferrite (industrial grade, Beikuang Magnetic Materials Technology Co., Ltd.), respectively.

[0045] 5) Press the mixed magnetic pow...

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Abstract

The invention discloses a neodymium-iron-boron / ferrite composite flexible magnet and a preparation method thereof. The preparation method comprises: modifying neodymium-iron-boron magnetic powder with a modification liquid, and after modification, it is mixed with a rubber binder and a ferrite A NdFeB / ferrite composite flexible magnet is prepared; wherein, the modifying solution is composed of epoxy resin, aminopropyltriethylsilane and dioctyl phthalate. The invention adopts the magnetic powder modifying liquid to modify the surface of NdFeB magnetic powder to improve its compatibility with the matrix, and uses ferrite as the second filling phase of magnetic powder to reduce the usage of NdFeB magnetic powder and improve the resistance of the final flexible magnet. Corrosion performance, to obtain a composite flexible magnet with excellent magnetic properties, good mechanical properties and good corrosion resistance.

Description

technical field [0001] The invention relates to a neodymium-iron-boron / ferrite composite flexible magnet and a preparation method thereof, belonging to the technical field of functional polymer composite materials. Background technique [0002] Due to its good mechanics and excellent processing characteristics, flexible permanent magnet composite materials are used as an important supplementary part of sintered alloy or ceramic permanent magnets, and are used in micro-special motors, drives and other fields. The important performance indicators of flexible magnets are mainly composed of permanent magnet characteristics and mechanical properties. It should be said that the permanent magnetic properties of flexible magnets are mainly derived from the magnetic filling phase. In order to obtain a higher maximum magnetic energy product, the strategy adopted is mostly to choose magnetic powder with high magnetic properties as the filling phase or to increase the content of the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/09H01F41/02
CPCH01F1/09H01F41/0266
Inventor 刘俊亮农丽娟任茂芳康佐成刘易晟黄浩王迎凯
Owner YANGZHOU UNIV