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A high-performance bonded NdFeB magnet and its preparation method

A NdFeB, high-performance technology, applied in the field of magnets, can solve the problems of NdFeB magnets that are not easy to process, low Curie temperature, easy to pulverize and corrode, etc., to achieve improved mechanical strength, good processing performance, and small dimensional changes Effect

Active Publication Date: 2019-06-18
安徽省东方磁磁铁制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of NdFeB are high cost performance and good mechanical properties. The disadvantages are that the Curie temperature is low, the temperature characteristics are poor, and it is easy to pulverize and corrode. It must be improved by adjusting its chemical composition and adopting surface treatment methods. , in order to meet the requirements of practical application
However, the NdFeB magnets prepared by the existing methods are not easy to process, and the mechanical strength needs to be further improved.

Method used

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  • A high-performance bonded NdFeB magnet and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-performance bonded NdFeB magnet, comprising the following raw materials in parts by weight: 85 parts of NdFeB magnetic powder, 8 parts of chlorinated polyethylene, 2 parts of bisphenol A epoxy resin, 0.15 parts of fatty amine curing agent, lubricating 0.8 parts of anti-oxidants, 0.7 parts of antioxidants, 0.25 parts of nano-ceramics, nano-TiO 2 0.04 parts, nano zinc oxide whiskers 0.05 parts.

[0022] The above-mentioned lubricant is a mixture of zinc stearate and magnesium stearate, and the mass ratio of zinc stearate and magnesium stearate is 1:2.

[0023] The above phenolic antioxidants can be selected from IRGANOX1010, IRGANOX245 or IRGANOX1098.

[0024] The particle size of the above-mentioned NdFeB magnetic powder is 50-80 mesh.

[0025] The preparation method of the above-mentioned high-performance bonded NdFeB magnet comprises the following steps:

[0026] (1) Add chlorinated polyethylene, bisphenol A type epoxy resin, aliphatic amine solidifying agen...

Embodiment 2

[0029] A high-performance bonded NdFeB magnet, comprising the following raw materials in parts by weight:

[0030] 82 parts of NdFeB magnetic powder, 10 parts of chlorinated polyethylene, 2 parts of hydrogenated bisphenol A epoxy resin, 0.18 parts of polyamide curing agent, 1.2 parts of lubricant, 0.7 parts of phenolic antioxidant, and 0.15 parts of nano ceramics Parts, Nano TiO 2 0.08 parts, nano zinc oxide whiskers 0.05 parts.

[0031] The above-mentioned lubricant is a mixture of zinc stearate and magnesium stearate, and the mass ratio of zinc stearate and magnesium stearate is 1:2.

[0032] The particle size of the above-mentioned NdFeB magnetic powder is 80-120 mesh.

[0033] The preparation method of the above-mentioned high-performance bonded NdFeB magnet comprises the following steps:

[0034] (1) Add chlorinated polyethylene, hydrogenated bisphenol A type epoxy resin, polyamide curing agent, phenolic antioxidant to the high mixer, then add the organic solvent (the...

Embodiment 3

[0037] A high-performance bonded NdFeB magnet, including the following raw materials in parts by weight: 90 parts of NdFeB magnetic powder, 8 parts of chlorinated polyethylene, 1.5 parts of phenol-formaldehyde epoxy resin, 0.14 parts of aromatic amine curing agent, lubricant 1.2 parts, 0.5 parts of phenolic antioxidant, 0.2 parts of nano ceramics, nano TiO 2 0.05 parts, nano zinc oxide whiskers 0.03 parts.

[0038] The above-mentioned lubricant is a mixture of zinc stearate and magnesium stearate, and the mass ratio of zinc stearate and magnesium stearate is 1:2.

[0039] The particle size of the aforementioned NdFeB magnetic powder is 50-150 mesh.

[0040] The preparation method of the above-mentioned high-performance bonded NdFeB magnet comprises the following steps:

[0041] (1) Add chlorinated polyethylene, phenol-formaldehyde type epoxy resin, aromatic amine curing agent, phenolic antioxidant to the high mixer, then add the organic solvent of 14 times of the weight of ...

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Abstract

The invention provides a high-performance bonded NdFeB magnet and a preparation method thereof, comprising the following raw materials in parts by weight: 80-90 parts of NdFeB magnetic powder, 7-10 parts of chlorinated polyethylene, and 1-3 parts of epoxy resin 0.1-0.18 parts of curing agent, 0.6-1.2 parts of lubricant, 0.5-1 part of antioxidant, 0.1-0.3 parts of nano-ceramic, nano-TiO 2 0.02-0.08 part, nano-zinc oxide whisker 0.03-0.06 part, the present invention adds suitable amount of nano-ceramics, nano-TiO 2 , nano-zinc oxide whiskers, and reasonable allocation of the amount of magnetic powder and resin at the same time, greatly improving the mechanical strength of the magnet, and making the magnet have better processing performance. The magnet of the present invention has excellent magnetic properties and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of magnets, in particular to a high-performance bonded NdFeB magnet and a preparation method thereof. Background technique [0002] NdFeB strong magnets are the best in magnetic synthetic materials. Neodymium magnets are called NdFeB magnets, which are collectively referred to as strong magnets. Their chemical formula is Nd2Fe14B. of permanent magnets. The advantages of NdFeB are high cost performance and good mechanical properties. The disadvantages are that the Curie temperature is low, the temperature characteristics are poor, and it is easy to pulverize and corrode. It must be improved by adjusting its chemical composition and adopting surface treatment methods. , in order to meet the requirements of practical applications. [0003] According to its manufacturing process, NdFeB magnets can be divided into bonded NdFeB magnets and sintered NdFeB magnets. Among them, bonded NdFeB magnets have the advantages of ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08H01F41/02B22F1/00B22F3/02
CPCH01F1/0571H01F1/0578H01F41/0266B22F3/02B22F2003/023B22F1/107
Inventor 曹庆波王遵跃张展胜
Owner 安徽省东方磁磁铁制造有限公司