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A kind of low power consumption metal soft magnetic composite material and preparation method thereof

A soft magnetic composite material, low power consumption technology, applied in the direction of magnetic materials, metal processing equipment, inorganic materials, etc., can solve the problems of limited loss reduction, easy cracking of the cladding layer, high cost, etc., and achieve the effect of increasing the resistivity

Active Publication Date: 2019-06-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are several problems in this method: 1) The bonding strength between the formed phosphate layer and the magnetic powder matrix is ​​poor, and it is easy to deform and fall off in the subsequent pressing and molding process; 2) The thermal stability of the coating layer is not high, and the phosphate It is easy to decompose above 600°C, which greatly limits its effect of reducing loss; 3) Waste liquids such as phosphoric acid used in coating treatment are likely to cause environmental pollution
Although the above method obtains a good insulating coating layer, there is still the problem that the coating layer is easy to crack during the pressing process, and the preparation steps are too cumbersome and the cost is high, so it is difficult to apply in actual production

Method used

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  • A kind of low power consumption metal soft magnetic composite material and preparation method thereof
  • A kind of low power consumption metal soft magnetic composite material and preparation method thereof
  • A kind of low power consumption metal soft magnetic composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0017] In this embodiment, the molecular formula of the alloy constituting the soft magnetic composite material is Fe 75 Si 20 Mg 5 , the following are the specific preparation steps:

[0018] (1) Putting Fe, Si and Mg into a vacuum induction furnace for smelting according to the proportioning ratio to obtain alloy ingots;

[0019] (2) the alloy ingot is made into soft magnetic powder by means of mechanical crushing and ball milling;

[0020] (3) Mix the obtained soft magnetic powder after classification treatment of -400 mesh, -300 mesh, -200 mesh, and -100 mesh. The mass percentage content of the mixed powder is: -100 ~ +200 mesh accounts for 5%, - 200~+300 mesh accounts for 20%, -300~+400 mesh accounts for 30%, and the rest is -400 mesh;

[0021] (4) Heat the powder to 200°C in an air atmosphere, keep it for 60 minutes, and precipitate an oxide layer at the grain boundary of the alloy;

[0022] (5) adding mass fraction to the magnetic powder after heat treatment is 2% ...

Embodiment 2

[0027] In this embodiment, the molecular formula of the alloy constituting the soft magnetic composite material is Fe 87 Si 10 Mg 3 , the following are the specific preparation steps:

[0028] (1) Putting Fe, Si and Mg into a vacuum induction furnace for smelting according to the proportioning ratio to obtain alloy ingots;

[0029] (2) the alloy ingot is made into soft magnetic powder by means of mechanical crushing and ball milling;

[0030] (3) Mix the obtained soft magnetic powder after classification treatment of -400 mesh, -300 mesh, -200 mesh, and -100 mesh. The mass percentage content of the mixed powder is: -100 ~ +200 mesh accounts for 20%, - 200~+300 mesh accounts for 30%, -300~+400 mesh accounts for 50%, and the rest is -400 mesh;

[0031] (4) Heat the powder to 700°C in an atmosphere containing 15% oxygen, keep it for 10 minutes, and precipitate an oxide layer at the alloy grain boundary;

[0032] (5) adding a mass fraction of 5% silicone resin and 1% barium s...

Embodiment 3

[0037] In this embodiment, the molecular formula of the alloy constituting the soft magnetic composite material is Fe 94.5 Si 5 Mg 0.5 , the following are the specific preparation steps:

[0038] (1) Putting Fe, Si and Mg into a vacuum induction furnace for smelting according to the proportioning ratio to obtain alloy ingots;

[0039] (2) the alloy ingot is made into soft magnetic powder by means of atomization;

[0040] (3) Mix the obtained soft magnetic powder after classification treatment of -400 mesh, -300 mesh, -200 mesh, and -100 mesh. The mass percentage content of the mixed powder is: -100~+200 mesh accounts for 10%, - 200~+300 mesh accounts for 25%, -300~+400 mesh accounts for 40%, and the rest is -400 mesh;

[0041] (4) Heat the powder to 400°C in an atmosphere containing 75% oxygen, keep it for 30 minutes, and precipitate an oxide layer at the alloy grain boundary;

[0042] (5) adding mass fraction to the magnetic powder after heat treatment is 1% water glass ...

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Abstract

The invention discloses a metal soft magnetic composite material with low power consumption and a preparation method thereof. The composition of the soft magnetic composite alloy magnetic powder satisfies the following formula in terms of atomic ratio: Fe100-x-ySixMy, wherein M is selected from one or more of Mg, Ca, and La, and the subscripts x and y represent the corresponding alloying elements. Atomic percent, satisfying the following conditions: 0

Description

technical field [0001] The invention relates to a metal soft magnetic composite material with low power consumption and a preparation method thereof, belonging to the technical field of soft magnetic materials. Background technique [0002] Metal soft magnetic composite materials not only retain the excellent characteristics of soft magnetic alloys and ferrites, but also overcome their defects to the greatest extent, and have the advantages of high magnetic permeability, high saturation magnetic density, and wide operating frequency. Since its inception, soft magnetic composite materials have developed rapidly and are widely used in important fields such as energy, information, and national defense. Metal soft magnetic composite materials are prepared through steps such as powder preparation, particle size ratio, insulation coating, adding binder, compression molding, heat treatment to remove internal stress, etc. Among them, insulation coating is a key process in the prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147H01F1/22C22C38/02B22F1/00
CPCH01F1/14766H01F1/22C22C38/002C22C38/005C22C38/02B22F1/10
Inventor 吴琛周晨晖严密
Owner ZHEJIANG UNIV