Sintered neodymium-iron-boron material and preparation method therefor

A NdFeB, powder material technology, applied in magnetic materials, inductor/transformer/magnet manufacturing, magnetic objects, etc., can solve the problem of low comprehensive performance, and achieve the effects of simple process, high magnetic performance, and low preparation cost

Active Publication Date: 2017-07-04
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the comprehensive performance of the above materials is not high

Method used

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  • Sintered neodymium-iron-boron material and preparation method therefor
  • Sintered neodymium-iron-boron material and preparation method therefor
  • Sintered neodymium-iron-boron material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A sintered NdFeB material is composed of iron-based NdFeB powder and composite ferrite powder, nano SnO 2 -Ni composite powder is sintered; the composition and mass percentage of the iron-based NdFeB powder material matrix are: Nd 21%, B 0.3%, Sn0.1%, Co 0.2%, Y 0.3%, Ni 0.3 %, Pb 0.1%, and the balance is Fe. The iron-based NdFeB powder material matrix is ​​also distributed with 0.05% AlN particles by weight, and the average diameter of the particles is 0.3 microns. The weight percent of composite ferrite is: BaO 15%, La 2 o 3 0.6%, CuO 0.1%, CaO 0.02%, Al 2 o 3 0.2%, SiO 2 0.03%, Ce 2 o 3 0.3%, the rest is Fe 2 o 3 . Nano SnO 2 -SnO in Ni composite powder 2 The weight ratio to Ni is 1:0.1. In this embodiment, the iron-based NdFeB powder and composite ferrite, nano SnO sintered NdFeB material 2 - The mass ratio of the Ni composite powder is 100:2:0.2.

[0023] Preparation:

[0024]The preparation method of iron-based NdFeB powder is as follows: raw ma...

Embodiment 2

[0030] A sintered NdFeB material is composed of iron-based NdFeB powder and composite ferrite powder, nano SnO 2 -Ni composite powder is sintered; the composition and mass percentage of the iron-based NdFeB powder material matrix are: Nd 25%, B 0.9%, Sn0.4%, Co 0.9%, Y 0.8%, Ni 0.7 %, Pb 0.4%, and the balance is Fe. The iron-based NdFeB powder material matrix is ​​also distributed with 0.3% AlN particles by weight, and the average diameter of the particles is 0.7 microns. The weight percent of composite ferrite is: BaO 20%, La 2 o 3 0.8%, CuO 0.3%, CaO 0.03%, Al 2 o 3 0.2-0.5%, SiO 2 0.6%, Ce 2 o 3 0.6%, the rest is Fe 2 o 3 . Nano SnO 2 -SnO in Ni composite powder 2 The weight ratio to Ni is 1:0.4. In this embodiment, the iron-based NdFeB powder and composite ferrite, nano SnO sintered NdFeB material 2 - The mass ratio of the Ni composite powder is 100:2:0.6.

[0031] Preparation:

[0032] The preparation method of iron-based NdFeB powder is as follows: raw...

Embodiment 3

[0037] A sintered NdFeB material is composed of iron-based NdFeB powder and composite ferrite powder, nano SnO 2 -Ni composite powder is sintered; the composition and mass percentage of the iron-based NdFeB powder material matrix are: Nd 23%, B 0.5%, Sn0.3%, Co 0.5%, Y 0.5%, Ni 0.4 %, Pb 0.2%, and the balance is Fe. The iron-based NdFeB powder material matrix is ​​also distributed with 0.15% AlN particles by weight, and the average diameter of the particles is 0.5 microns. The weight percent of composite ferrite is: BaO 17%, La 2 o 3 0.7%, CuO 0.2%, CaO 0.025%, Al 2 o 3 0.3%, SiO 2 0.04%, Ce 2 o 3 0.5%, the rest is Fe 2 o 3 . Nano SnO 2 -SnO in Ni composite powder 2 The weight ratio to Ni is 1:0.2. Iron-based NdFeB powder, composite ferrite, and nano SnO of sintered NdFeB material in the present invention 2 - The mass ratio of the Ni composite powder is 100:2:0.4.

[0038] Preparation:

[0039]The preparation method of iron-based NdFeB powder is as follows: ...

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Abstract

The invention discloses a sintered neodymium-iron-boron material and a preparation method therefor. The sintered neodymium-iron-boron material is prepared from iron-based neodymium-iron-boron powder, composite ferrite powder, and nanometer SnO<2>-Ni composite powder in a sintering manner; the iron-based neodymium-iron-boron powder comprises the following components based on mass percentage: 21-25% of Nd, 0.3-0.9% of B, 0.1-0.4% of Sn,0.2-0.9% of Co, 0.3-0.8% of Y, 0.3-0.7% of Ni, 0.1-0.4% of Pb and the balance of Fe; and the iron-based neodymium-iron-boron powder also comprises 0.05-0.3% of AlN micro particles based on weight percentage. The sintered neodymium-iron-boron material disclosed by the invention has extremely high magnetic property; the preparation method for the high-magnetic-energy-product sintered neodymium-iron-boron material does not use many rare and noble materials; and instead, the preparation method is simple in preparation cost, simple in process, convenient to operate, and suitable for popularization.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a sintered NdFeB material and a preparation method. Background technique [0002] The patent application with the application number CN201610478417.8 provides a high energy product sintered NdFeB permanent magnet material, which is sintered from NdFeB powder, nano-bismuth powder, nano-strontium ferrite, and nano-molybdenum disulfide. The composition and mass percentage of NdFeB powder are: Nd 25.6-27.1%, B 0.76-0.89%, Ni 0.45-0.53%, Y0.25-0.32%, Ga 0.35-0.43%, Nb 1.04-1.16 %, Pr 3.9-4.6%, Al 0.34-0.41%, and the balance is Fe. [0003] However, the comprehensive performance of the above materials is not high. Contents of the invention [0004] In order to overcome the deficiencies of the prior art, the first purpose of the present invention is to provide a sintered NdFeB material with extremely high magnetic properties; the second purpose of the present invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02C22C38/10C22C38/08C22C38/60C22C33/02
CPCC22C33/0278C22C38/005C22C38/008C22C38/105C22C38/60H01F1/0576H01F1/0577H01F41/0266
Inventor 张作州陈斌王立根张丹
Owner XUZHOU NANFANG YONGCI MATERIAL
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