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Preparation method of high-performance sintered Nd-Fe-B flake magnets by water transfer printing

A high-performance NdFeB technology, which is applied in the field of water transfer printing to prepare high-performance sintered NdFeB sheet magnets, to achieve uniform distribution and high thickness consistency, improve the coercive force of the magnetic sheet, and improve the effect of industrialization

Active Publication Date: 2018-12-07
NINGBO ZHAOBAO MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has not been reported in the field of magnetic materials

Method used

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  • Preparation method of high-performance sintered Nd-Fe-B flake magnets by water transfer printing
  • Preparation method of high-performance sintered Nd-Fe-B flake magnets by water transfer printing
  • Preparation method of high-performance sintered Nd-Fe-B flake magnets by water transfer printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a high-performance sintered NdFeB sheet magnet by water transfer printing, comprising the following steps:

[0021] 1) Firstly, DyF powder with a particle size of ≤10 microns 3 The heavy rare earth compound powder is printed on the decal paper using 3D printing technology;

[0022] 2) Then soak the flower paper in water for 30s, and paste it on the pretreated sintered NdFeB sheet magnet to obtain a coating. The surface of the magnet is pretreated by using Na 3 PO 4 、Na 2 CO 3 , NaOH, OP-10 mixed solution as the base, adjust the pH with formic acid, ultrasonically clean at 70°C for 2 minutes to remove oil, then pickle with a mixture of nitric acid, thiourea and sodium lauryl sulfate, and then deionize obtained by ultrasonic cleaning of water;

[0023] 3) Then wipe off the water and carry out drying treatment. The drying treatment process is to keep warm at 80 ° C for 1 hour, and the sintered NdFeB thin-sheet magnets after drying treatment are ...

Embodiment 2

[0033] A method for preparing a high-performance sintered NdFeB sheet magnet by water transfer printing, comprising the following steps:

[0034] 1) Firstly, DyF powder with a particle size of ≤10 microns 3 The heavy rare earth compound powder is printed on the decal paper using 3D printing technology;

[0035]2) Then soak the flower paper in water for 30s, and paste it on the pretreated sintered NdFeB thin sheet magnet to obtain a coating. The surface pretreatment of the magnet is the same as that in Example 1.

[0036] 3) Then wipe off the moisture and carry out drying treatment. The drying treatment process is to keep warm at 120 ° C for 1 hour, and the sintered NdFeB thin-sheet magnets after drying treatment are stored in an inert gas environment;

[0037] 4) After drying, the sintered NdFeB thin film magnet is -3 Diffusion treatment and aging treatment were carried out in an inert gas environment of Pa, the temperature of diffusion treatment was 900°C, and the time was ...

Embodiment 3

[0044] A method for preparing a high-performance sintered NdFeB sheet magnet by water transfer printing, comprising the following steps:

[0045] 1) First, powder DyH with a particle size of ≤10 microns 3 The heavy rare earth compound powder is printed on the decal paper using 3D printing technology;

[0046] 2) Then soak the flower paper in water for 30s, and paste it on the pretreated sintered NdFeB thin sheet magnet to obtain a coating. The surface pretreatment of the magnet is the same as that in Example 1.

[0047] 3) Then wipe off the water and carry out drying treatment. The drying treatment process is to keep warm at 110 ° C for 1 hour, and the sintered NdFeB thin-sheet magnet after drying treatment is stored in an inert gas environment;

[0048] 4) After drying, the sintered NdFeB thin film magnet is -3 Diffusion treatment and aging treatment were carried out in an inert gas environment of Pa, the temperature of diffusion treatment was 1100°C, and the time was 4h; t...

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Abstract

The invention discloses a method for preparing high-performance sintered Nd-Fe-B sheet magnet by water transfer printing, At first, that heavy rare earth metal powder or the heavy rare earth compoundpowder is printed on the decorative paper by the 3D printing technology, Then the pattern paper is immersed in water for 30 seconds, and is affixed to the sintered Nd-Fe-B flake magnet whose surface is pretreated, and then the water is wiped off and dried to obtain the coating containing heavy rare earth elements on the surface of the sintered Nd-Fe-B flake magnet, and then the sintered Nd-Fe-B flake magnet dried by the diffusion treatment and the aging treatment are carried out in an inert gas environment. The method of the invention successfully applies the water transfer technology to the grain boundary diffusion technology, and adopts the water transfer technology to obtain a coating with high uniformity of distribution and consistency of thickness on the surface of the sintered Nd-Fe-B sheet magnet, thereby realizing industrialization of the grain boundary diffusion technology when the magnetic properties of the sintered Nd-Fe-B sheet magnet are improved.

Description

technical field [0001] The invention relates to a processing method for a sintered NdFeB thin-slice magnet, more specifically, it relates to a method for preparing a high-performance sintered NdFeB thin-slice magnet by water transfer printing. Background technique [0002] With the significant progress of science and technology and rapid economic development, the demand for sintered NdFeB materials used in many fields such as scientific research, industry, household appliances and office automation is increasing. High-performance sintered NdFeB materials are used in computers , Precision machine tools, detectors, measuring instruments, automotive motors and various permanent magnet motors have a wide range of application backgrounds. At the same time, with the accelerated development of "low-carbon economy", the promotion speed and application range of sintered NdFeB materials in high-end fields such as wind power, inverter compressors, and hybrid power have expanded rapidly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0577H01F41/0293
Inventor 林建强贺琦军
Owner NINGBO ZHAOBAO MAGNET
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