A preparation method of multi-magnetic powder mixed bonded magnetic material

A magnetic material and magnetic powder technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of wide particle size distribution of powder, unfavorable magnetic materials, long ball milling time, etc. The effect of improved ability and strong anti-corrosion ability

Active Publication Date: 2020-01-24
江西伟普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the preparation of existing magnetic materials, the ball milling time is too long, at least 22 hours, the particle size distribution of the powder produced by ball milling is wide, and the cooling temperature difference is large, which is not conducive to the production of high-performance magnetic materials

Method used

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  • A preparation method of multi-magnetic powder mixed bonded magnetic material

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Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 The preparation method of multi-magnetic powder mixed bonded magnetic material is implemented according to the following steps:

[0034] 1) Mix the ingredients evenly:

[0035] The ingredients include the following magnetic powders in parts by mass: 50 parts of anisotropic strontium ferromagnetic powder, 25 parts of anisotropic barium ferromagnetic powder, 20 parts of isotropic NdFeB magnetic powder, 10 parts of anisotropic NdFeB magnetic powder, 5 parts of anisotropic samarium-cobalt magnetic powder; the anisotropic strontium-iron magnetic powder, the anisotropic barium-iron magnetic powder, the isotropic neodymium-iron-boron magnetic powder, and the anisotropic neodymium-iron-boron magnetic powder were placed In a vacuum ball mill, add 30% of the total weight of the magnetic powder into it as a dispersant anhydrous methanol, vacuumize, and ball mill for 2 hours under the condition of a vacuum degree of 0.06 MPa, with a ball-to-material ratio of 10:1, to o...

Embodiment 2

[0047] Embodiment 2 The preparation method of multi-magnetic powder mixed bonded magnetic material is implemented according to the following steps:

[0048] 1) Mix the ingredients evenly:

[0049] The ingredients include the following magnetic powders in parts by mass: 55 parts of anisotropic strontium ferromagnetic powder, 28 parts of anisotropic barium ferromagnetic powder, 22 parts of isotropic NdFeB magnetic powder, 15 parts of anisotropic NdFeB magnetic powder, 8 parts of anisotropic samarium cobalt magnetic powder;

[0050] The anisotropic strontium ferromagnetic powder, the anisotropic barium ferromagnetic powder, the isotropic NdFeB magnetic powder, and the anisotropic NdFeB magnetic powder are placed in a vacuum ball mill, and the total magnetic powder is added therein. 40% by weight of the dispersant absolute ethanol, vacuumized, and ball milled for 3 hours under a vacuum of 0.05 MPa, with a ball-to-material ratio of 10:1, to obtain a primary grinding powder;

[00...

Embodiment 3

[0062] Embodiment 3 The preparation method of multi-magnetic powder mixed bonded magnetic material is implemented according to the following steps:

[0063] 1) Mix the ingredients evenly:

[0064] The ingredients include the following magnetic powders in parts by mass: 65 parts of anisotropic strontium iron magnetic powder, 30 parts of anisotropic barium ferromagnetic powder, 25 parts of isotropic NdFeB magnetic powder, 20 parts of anisotropic NdFeB magnetic powder, 10 parts of anisotropic samarium cobalt magnetic powder;

[0065] The anisotropic strontium ferromagnetic powder, the anisotropic barium ferromagnetic powder, the isotropic NdFeB magnetic powder, and the anisotropic NdFeB magnetic powder are placed in a vacuum ball mill, and the total magnetic powder is added therein. 50% by weight of the dispersant, vacuumized, and ball milled for 5 hours under the condition of a vacuum of 0.03 MPa, to obtain a primary grinding powder;

[0066] 2) Melting:

[0067] Fill the vac...

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Abstract

The invention discloses a preparation method of a multiple magnetic-powder mixed bonded magnetic material, and belongs to the field of magnetic material preparation. The preparation method of the multiple magnetic-powder mixed bonded magnetic material includes the following steps of ingredient blending, smelting, cooling, hydrogen decrepitation, pelleting, injection moulding and post-treatment. Bythe adoption of the preparation method of the multiple magnetic-powder mixed bonded magnetic material, the time cost of production is reduced, the production cycle is shortened, therefore, the production cost is reduced indirectly, the production efficiency is improved, and the high-performance magnetic material can be produced.

Description

technical field [0001] The invention relates to the field of magnetic material preparation, and more specifically, to a preparation method of multi-magnetic powder mixed and bonded magnetic material. Background technique [0002] Magnetic materials play an important role in traditional and emerging fields such as electronics, computers, information and communication, medical treatment, aerospace, automobiles, wind power, environmental protection and energy saving. Magnetic materials have become an irreplaceable material to promote high-tech development and contemporary economic progress, and their development prospects are optimistic. In the preparation of existing magnetic materials, the ball milling time is too long, at least 22 hours, the particle size distribution of the powder produced by ball milling is wide, and the cooling temperature difference is large, which is not conducive to the production of high-performance magnetic materials. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/047H01F1/06H01F1/08
CPCH01F1/047H01F1/061H01F1/083
Inventor 邵萌曾浩李勇段晓峰曾光远
Owner 江西伟普科技有限公司
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