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A kind of iron-silicon-based soft magnetic powder core with multiple insulating layers and preparation method thereof

A soft magnetic powder core and insulating layer technology, applied in magnetic objects, magnetic materials, electrical components, etc., can solve the problems of high energy and raw material loss, complex preparation process, disadvantageous mass preparation, etc., to shorten the production cycle, the process is simple, The effect of good application prospects

Active Publication Date: 2019-12-24
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insulating layer of the obtained soft magnetic composite material is relatively uniform, and the magnetic properties are good, but the preparation process is complicated, the operation is not easy, the energy and raw material loss are more, and it is not conducive to mass production.

Method used

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  • A kind of iron-silicon-based soft magnetic powder core with multiple insulating layers and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A multi-insulation-layer iron-silicon-based soft magnetic powder core and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0036] The first step, composite powder preparation

[0037] The iron-silicon alloy powder is placed in water vapor, and the temperature of the water vapor is 100-150° C. and stirred for 0.5-1 hour to obtain a composite powder.

[0038] The second step, cold forming

[0039] The composite powder is vacuum-dried, loaded into a mold, and cold-pressed under the condition of 300-600 MPa to obtain a green body.

[0040] The third step, sintering

[0041] The green body is placed in a high-temperature sintering furnace, heated to 800-900° C. under vacuum conditions, and sintered for 0.5-1 hour to obtain a sintered green body.

[0042] The fourth step, heat treatment

[0043] The sintered green body is placed in a heat treatment furnace, heated to 900-1200° C. under vacuum, heat-treated for 4.5-5 ho...

Embodiment 2

[0048] A multi-insulation-layer iron-silicon-based soft magnetic powder core and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0049] The first step, composite powder preparation

[0050] The iron-silicon alloy powder is placed in water vapor, and stirred for 1-1.5 hours under the condition that the temperature of the water vapor is 130-180° C. to obtain a composite powder.

[0051] The second step, cold forming

[0052] The composite powder is vacuum-dried, loaded into a mold, and cold-pressed under the condition of 450-750 MPa to obtain a green body.

[0053] The third step, sintering

[0054] The green body is placed in a high-temperature sintering furnace, heated to 900-1000° C. under protective atmosphere conditions, and sintered for 1.5-2 hours to obtain a sintered green body.

[0055] The fourth step, heat treatment

[0056] The sintered green body is placed in a heat treatment furnace, heated to 800-1100° C. ...

Embodiment 3

[0061] A multi-insulation-layer iron-silicon-based soft magnetic powder core and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0062] The first step, composite powder preparation

[0063] The iron-silicon alloy powder is placed in water vapor, and stirred for 1.5-2 hours under the condition that the temperature of the water vapor is 160-210° C. to obtain a composite powder.

[0064] The second step, cold forming

[0065] The composite powder is vacuum-dried, loaded into a mold, and cold-pressed under the condition of 600-900 MPa to obtain a green body.

[0066] The third step, sintering

[0067] The green body is placed in a high-temperature sintering furnace, heated to 1000-1100°C under vacuum conditions, and sintered for 2.5-3 hours to obtain a sintered green body.

[0068] The fourth step, heat treatment

[0069] The sintered green body is placed in a heat treatment furnace, heated to 700-1000° C. under vacuum, he...

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Abstract

The invention discloses an iron-silicon based soft magnetic powder core with multiple insulation layers and a preparation method thereof. According to the technical scheme, iron-silicon alloy powder is stirred in a water vapor atmosphere at 100-260 DEG C for 0.5-3 hours to obtain composite powder; the composite powder is subjected to vacuum drying, placed in a mold and subjected to cold press molding at 300-1200 MPa to obtain a green body; the green body is placed in a high-temperature sintering furnace, heated to 800-1300 DEG C under the condition of vacuum or protective atmosphere and sintered for 0.5-5 hours to obtain a sintered green body; the sintered green body is placed in a heat treatment furnace, heated to 500-1200 DEG C under the condition of vacuum or protective atmosphere, subjected to heat treatment for 0.5-5 hours and cooled with the furnace to obtain the iron-silicon soft magnetic powder core with multiple insulation layers. The process is simple, the production cycle isshort, insulating coating layers of the prepared iron-silicon soft magnetic powder core with multiple insulation layers are uniform and thin, the eddy current loss is low, the saturation magnetic induction intensity is high, and the coercive force is low.

Description

technical field [0001] The invention belongs to the technical field of iron-silicon-based soft magnetic powder cores. In particular, it relates to a multi-insulation-layer iron-silicon-based soft magnetic powder core and a preparation method thereof. Background technique [0002] FeSi-based soft magnetic powder cores are widely used in inverters, inductors, and Among electronic components such as converters, transformers and choke coils, it involves many fields such as motors, telecommunications, and power supplies. [0003] It is worth mentioning that as the frequency of use increases, the eddy current loss of the soft magnetic powder core increases exponentially, and the insulating coating of magnetic particles is undoubtedly the most effective way to reduce the eddy current loss. On this basis, insulation coating is mainly divided into two types: organic coating and inorganic coating. The common organic coating method is to mix magnetic particles and organic coating ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147
CPCH01F1/14766
Inventor 樊希安罗自贵李光强李亚伟
Owner WUHAN UNIV OF SCI & TECH
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