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Method for preparing neodymium, iron and boron by means of bonding by aid of high-uniformity adhesive

A production method and uniformity technology are applied in the production field of high-uniformity adhesive bonding RuFeB, which can solve the problems of difficulty in forming and demoulding, low stability of NdFeB, complicated preparation process, etc. To achieve the effect of easy molding and demoulding, reducing labor and equipment investment and energy costs, and proper particle grading

Inactive Publication Date: 2017-12-12
杭州天时亿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When producing magnets from these materials, try to achieve the theoretically smallest possible particle size in the finished magnet, the preparation process is complicated, the cost is high, and the stability of the NdFeB produced is not high, the heat resistance is average, and it is not easy to form and remove. mold

Method used

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  • Method for preparing neodymium, iron and boron by means of bonding by aid of high-uniformity adhesive
  • Method for preparing neodymium, iron and boron by means of bonding by aid of high-uniformity adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A kind of manufacture method of high-uniformity adhesive bonded RuFeB comprises the following steps:

[0022] (1): Magnetic powder particle size treatment: Use the NdFeB magnetic powder special grinding machine to grind the NdFeB magnetic powder until all the NdFeB magnetic powder passes through the 90-mesh sieve;

[0023] (2): Particle size treatment of auxiliary materials: extract γ-aminopropyltriethoxysilane, water and isopropanol according to mass percentage, and carry out proportioning;

[0024] (3): Material drying: Mix the magnetic powder processed in step 1 and a part of the auxiliary materials processed in step 2 evenly inside the set ultrasonic generator, pour it into the drying tray for drying, and the other part directly Mixing, after pouring and drying, leave it in the drying tray to obtain the mixed material;

[0025] (4): Granulation: Pour polylaurolactam and the mixed material in step 3 into the special-purpose granulator of NdFeB respectively for granu...

Embodiment 2

[0032] A kind of manufacture method of high-uniformity adhesive bonded RuFeB comprises the following steps:

[0033] (1): Magnetic powder particle size treatment: Use the NdFeB magnetic powder special grinding machine to grind the NdFeB magnetic powder until all the NdFeB magnetic powder passes through the 90-mesh sieve;

[0034] (2): Particle size treatment of auxiliary materials: extract γ-aminopropyltriethoxysilane, water and isopropanol according to mass percentage, and carry out proportioning;

[0035] (3): Material drying: mix the magnetic powder processed in step 1 and a part of the auxiliary materials processed in step 2 evenly inside the set ultrasonic generator, pour it into the drying tray for drying, and the other part in the The set heating to 500°C inside the ultrasonic generator is mixed with, poured into the drying tray and left to stand in the drying tray to obtain the mixed material;

[0036] (4): Granulation: Pour polylaurolactam and the mixed material in s...

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Abstract

The invention discloses a method for preparing neodymium, iron and boron by means of bonding by the aid of high-uniformity adhesive. The method includes steps of carrying out particle size treatment on magnetic powder, and to be more specific, grinding the neodymium, iron and boron magnetic powder by the aid of special neodymium, iron and boron magnetic powder grinding machines until the neodymium, iron and boron magnetic powder can pass 90-mesh screen cloth; carrying out particle size treatment on auxiliaries, to be more specific, extracting gamma-aminopropyltriethoxysilane, water and isopropyl alcohol according to mass percents and matching the gamma-aminopropyltriethoxysilane, the water and the isopropyl alcohol with one another; drying materials, to be more specific, uniformly mixing the magnetic powder treated at the step 1 and the auxiliaries treated at the step 2 with one another inside set ultrasonic generators to obtain mixtures, pouring the mixtures into drying discs, drying the mixtures, and then allowing the mixtures to stand still after the mixtures are dried so as to obtain mixed materials; carrying out granulation, to be more specific, pouring nylon 12 and the mixed materials obtained at the step 3 into special neodymium, iron and boron granulators, granulating the nylon 12 and the mixed materials to obtain particles and then allowing the particles to stand still after the nylon 12 and the mixed materials are granulated; carrying out injection molding on the particles in magnetic fields by the aid of injection molding machines. The method has the advantages that the human input, the equipment input and the energy cost can be reduced, and accordingly large-scale production can be facilitated.

Description

technical field [0001] The invention belongs to the technical field related to neodymium iron boron, and more specifically relates to a method for making neodymium iron boron bonded with a high-uniformity adhesive. Background technique [0002] A magnet that can maintain its magnetism for a long time is called a permanent magnet. Such as natural magnets (magnetite) and artificial magnets (alnico) and so on. In addition to permanent magnets, there are also electromagnets that need to be energized to be magnetic. Permanent magnets are also called hard magnets, which are not easily demagnetized or magnetized. However, if the permanent magnet is heated above the Curie temperature, or placed in an environment with a reverse high magnetic field strength, its magnetism will also decrease or disappear. Some magnets are brittle and may crack at high temperatures. The maximum operating temperature of alnico magnets exceeds 540°C (1,000°F), samarium cobalt magnets and ferrites are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F1/08B02C19/06B29C45/00B29K103/06B22F1/00B22F3/22
CPCH01F1/0578B02C19/06B22F3/225B29C45/0001B29K2103/06B22F1/107
Inventor 姚峰
Owner 杭州天时亿科技有限公司
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