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Preparation method of high-corrosion-resistance coating on surface of flexibly bonded neodymium iron boron-nickel zinc ferrite composite magnet

A technology of nickel-zinc ferrite and composite magnets, which is applied in the manufacture of permanent magnets, magnetic objects, inductors/transformers/magnets, etc., can solve the problems of high porosity, pulverization, and low mechanical properties of magnets, and achieve good durability Effect of high temperature and corrosion resistance, good magnetic and mechanical properties, long-term corrosion protection

Active Publication Date: 2020-08-11
HEYE HEALTH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the properties of bonded NdFeB magnets are very lively, and the bonded NdFeB magnets have a lower density than steel, a very high porosity, and a relatively large pore size, which is easy to let water , solvents and corrosive substances are infiltrated and corroded, resulting in problems such as expansion, rust, pulverization or loss of magnetism of bonded NdFeB magnets, which greatly limits the service life and application fields of bonded NdFeB magnets
At the same time, because the flexible bonded NdFeB is filled with a large amount of NdFeB powder, the mechanical properties of the magnet are low, the flexibility of the material becomes poor, the strength is low, and it is easy to break

Method used

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  • Preparation method of high-corrosion-resistance coating on surface of flexibly bonded neodymium iron boron-nickel zinc ferrite composite magnet
  • Preparation method of high-corrosion-resistance coating on surface of flexibly bonded neodymium iron boron-nickel zinc ferrite composite magnet

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Effect test

Embodiment 1

[0028] 1) Particle size recombination: use sieves with different mesh sizes to select the rapidly quenched NdFeB magnetic powder, separate the rapidly quenched NdFeB magnetic powder particles with different particle sizes, and mix according to the following mass percentage: the particle size is ≤200 mesh rapid quenched NdFeB magnetic powder Iron-boron magnetic powder is 5wt%, 100≤particle size<200 mesh quick-quenched NdFeB magnetic powder is 35wt%, 70≤particle size<100 mesh quick-quenched NdFeB magnetic powder is 60wt%; The sum of the percentages is 100%, and the rapidly quenched NdFeB magnetic powders of various particle sizes are mixed to obtain the rapidly quenched NdFeB magnetic powders with recombined particle sizes;

[0029] 2) Flexible bonded NdFeB-NiZn ferrite composite magnet: the rapid quenching NdFeB magnetic powder, 8wt% NiZn ferrite powder and 2wt% of the particle size recombined in the step 1) with a mass percentage of 90wt% % phenol formaldehyde type epoxy resin...

Embodiment 2

[0033] 1) Particle size recombination: use sieves with different mesh sizes to select the rapidly quenched NdFeB magnetic powder, separate the rapidly quenched NdFeB magnetic powder particles with different particle sizes, and mix according to the following mass percentage: the particle size is ≤200 mesh rapid quenched NdFeB magnetic powder The iron-boron magnetic powder is 10wt%, the 100≤particle size<200 mesh quick-quenched NdFeB magnetic powder is 35wt%, and the 70≤particle size<100 mesh quick-quenched NdFeB magnetic powder is 55wt%; The sum of the percentages is 100%, and the rapidly quenched NdFeB magnetic powders of various particle sizes are mixed to obtain the rapidly quenched NdFeB magnetic powders with recombined particle sizes;

[0034] 2) Flexible bonded NdFeB-NiZn ferrite composite magnet: the rapid quenching NdFeB magnetic powder, 10wt% NiZn ferrite powder and 10wt% recombined NdFeB magnetic powder with a mass percentage of 80wt% in step 1) % Double-part A-type e...

Embodiment 3

[0037] 1) Particle size recombination: use sieves with different mesh sizes to select the rapidly quenched NdFeB magnetic powder, separate the rapidly quenched NdFeB magnetic powder particles with different particle sizes, and mix according to the following mass percentage: the particle size is ≤200 mesh rapid quenched NdFeB magnetic powder 15wt% for iron-boron magnetic powder, 20wt% for quick-quenched NdFeB magnetic powder for 100≤particle size<200 mesh, 65wt% for fast-quenched NdFeB magnetic powder for 70≤particle size<100 mesh; the mass of fast-quenched NdFeB magnetic powder for each particle size The sum of the percentages is 100%, and the rapidly quenched NdFeB magnetic powders of various particle sizes are mixed to obtain the rapidly quenched NdFeB magnetic powders with recombined particle sizes;

[0038] 2) Flexible bonded NdFeB-NiZn ferrite composite magnet: the rapid quenching NdFeB magnetic powder, 8wt% NiZn ferrite powder and 7wt% of the particle size reorganization ...

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Abstract

The invention provides a preparation method of a high-corrosion-resistance coating on the surface of a flexibly bonded neodymium iron boron-nickel zinc ferrite composite magnet. The high-corrosion-resistance coating on the surface of the flexible bonded neodymium iron boron-nickel zinc ferrite composite magnet is prepared through the method of particle size recombination, flexible bonded neodymiumiron boron-nickel zinc ferrite compounding and spraying of the ZnO nano coating on the surface of the flexible bonded neodymium iron boron-nickel zinc ferrite composite magnet. The invention providesthe preparation method of the high-corrosion-resistance coating on the surface of the flexibly bonded neodymium iron boron-nickel zinc ferrite composite magnet, and the high-corrosion-resistance coating has good magnetism, mechanical properties and corrosion resistance and can provide a longer corrosion protection effect. Meanwhile, the preparation process is simple, easy to operate, low in production cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing a high corrosion-resistant coating on the surface of a flexible bonded NdFeB-NiZn ferrite composite magnet and the high corrosion-resistant coating Background technique [0002] Permanent magnet material is a material that is both ancient and full of modern vitality. It has a wide range of applications. The conversion of magnetic energy and sound energy can be used to manufacture telephones, audio and speakers, etc.; the conversion of magnetic energy and mechanical energy can be used to manufacture motors, Motors, etc.; the conversion of magnetic energy and electrical energy can be used to manufacture generators, etc. Devices made of permanent magnet materials have the advantages of high efficiency, energy saving, clean and pollution-free, and high reliability. [0003] Bonded NdFeB magnets have excellent magnetic properties and high cost performance, and are widely used in technical fields such as elect...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F1/11H01F41/02
CPCH01F1/0572H01F1/0576H01F1/0578H01F1/11H01F41/026H01F41/0266
Inventor 方彦雯方志财
Owner HEYE HEALTH TECH CO LTD
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