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A kind of permanent magnetic composite material and preparation method thereof

A composite material and permanent magnet technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problem of insufficient comprehensive performance of materials, and achieve the effect of being suitable for promotion, high performance, and high magnetic energy product

Active Publication Date: 2018-06-01
江苏北方永磁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the overall performance of the material is not high enough

Method used

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  • A kind of permanent magnetic composite material and preparation method thereof
  • A kind of permanent magnetic composite material and preparation method thereof
  • A kind of permanent magnetic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] It is sintered by iron-based permanent magnet powder and nano-tin oxide-cobalt composite powder; the material matrix components and mass percentages of iron-based permanent magnet powder are: Nd 25%, B 1.8%, Sn 0.25%, Si 0.20%, P 0.20%, Gd 5%, and the balance Fe. The iron-based permanent magnetic powder material matrix is ​​also distributed with BN particles with a weight percentage of 0.1%. In this embodiment, the mass ratio of the iron-based permanent magnet powder to the nano tin oxide-cobalt composite powder is 100:0.21. The weight ratio of tin oxide and cobalt in the nano tin oxide-cobalt composite powder is 2:0.1.

[0022] Preparation:

[0023] The preparation method of the iron-based permanent magnet powder is as follows: batching is carried out according to the mass percentage of each component, Nd, Sn, Si, Gd, and Fe are pure substances with an element content greater than 99.9%, B is added in the form of a boron-iron intermediate alloy, and the boron-iron in...

Embodiment 2

[0028] It is sintered by iron-based permanent magnet powder and nano-tin oxide-cobalt composite powder; the composition and mass percentage of the iron-based permanent magnet powder material matrix are: Nd 29%, B 2.3%, Sn 0.33%, Si 0.24%, P 0.24%, Gd 9%, and the balance is Fe. The iron-based permanent magnetic powder material matrix is ​​also distributed with 0.4% BN particles by weight. In this embodiment, the mass ratio of the iron-based permanent magnet powder to the nano tin oxide-cobalt composite powder is 100:0.28. The weight ratio of tin oxide to cobalt in the nano tin oxide-cobalt composite powder is 2:0.8.

[0029] Preparation:

[0030] The preparation method of the iron-based permanent magnet powder is as follows: batching is carried out according to the mass percentage of each component, Nd, Sn, Si, Gd, and Fe are pure substances with an element content greater than 99.9%, B is added in the form of a boron-iron intermediate alloy, and the boron-iron intermediate ...

Embodiment 3

[0034] It is sintered from iron-based permanent magnet powder and nano-tin oxide-cobalt composite powder; the material matrix components and mass percentages of iron-based permanent magnet powder are: Nd 27%, B1.9%, Sn 0.29%, Si 0.22%, P 0.22%, Gd 7%, the balance is Fe. The iron-based permanent magnet powder material matrix is ​​also distributed with 0.13% BN particles by weight. In this embodiment, the mass ratio of the iron-based permanent magnet powder to the nano tin oxide-cobalt composite powder is 100:0.24. The weight ratio of tin oxide and cobalt in the nano tin oxide-cobalt composite powder is 2:0.4.

[0035] Preparation:

[0036] The preparation method of the iron-based permanent magnet powder is as follows: batching is carried out according to the mass percentage of each component, Nd, Sn, Si, Gd, and Fe are pure substances with an element content greater than 99.9%, B is added in the form of a boron-iron intermediate alloy, and the boron-iron intermediate The B c...

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Abstract

The invention discloses a permanent magnet composite material and a preparation method thereof, which are formed by sintering iron-based permanent magnet powder and nano tin oxide-cobalt composite powder; the matrix component and mass percentage of the iron-based permanent magnet powder material are: Nd 25-29%, B 1.8-2.3%, Sn 0.25-0.33%, Si 0.20-0.24%, P 0.20-0.24%, Gd 5-9%, the balance is Fe; the iron-based permanent magnet powder material matrix is ​​also distributed There are BN particles with a weight percentage of 0.1-0.4%; the mass ratio of iron-based permanent magnet powder and nano tin oxide-cobalt composite powder is 100:0.21-0.28. The permanent magnetic composite material of the present invention has high remanent magnetic polarization, high density and high magnetic energy product, and the nano-tin oxide-cobalt composite powder plays a role of pinning which hinders the growth of iron-based permanent magnetic main phase crystal grains, thereby preparing crystal grains The fine ultra-fine grain permanent magnet material can achieve higher performance without adding heavy rare earth elements such as Dy and Tb. The preparation method of the permanent magnetic composite material of the invention does not use too many rare and precious materials, has low cost, simple process, convenient operation and is suitable for popularization.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a permanent magnetic composite material and a preparation method. Background technique [0002] CN201610706969.X provides an ultrafine-grained NdFeB permanent magnet material and a preparation method thereof. The permanent magnet material includes raw materials according to the total weight percentage: the Nd content is 25%-35%, the Fe content is 55%-70%, and the B content 0.5%-1.8%; auxiliary material: high-melting-point metal powder, the content of the high-melting-point metal powder is 0.5-2% of the total weight of Nd, Fe, B; through tableting; crushing; fine grinding; adding auxiliary materials ; Wet ball milling; Dispersion; Compression molding; Sintering. [0003] But the comprehensive performance of the material is not high enough. Contents of the invention [0004] In order to overcome the deficiencies of the prior art, the first purpose of the present i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/059H01F1/33C22C38/02C22C33/02B22F1/00
CPCH01F1/059H01F1/33C22C33/0278C22C38/002C22C38/005C22C38/008C22C38/02B22F1/054
Inventor 张作州
Owner 江苏北方永磁科技有限公司