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FeNi nanoparticle/epoxy resin composite coated iron-silicon magnetic powder core and preparation method thereof

A technology of epoxy resin and nanoparticles, which is applied in the manufacture of inductors/transformers/magnets, magnetic cores/yokes, and the magnetism of inorganic materials. The preparation process is cumbersome and other problems, and the density is improved, the magnetic domain structure is optimized, and the effect is suitable for popularization and application.

Pending Publication Date: 2021-08-24
宝武环科武汉金属资源有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large specific surface area of ​​FeNi magnetic nanoparticles, using nano-magnetic particles alone to prepare magnetic powder cores will cause the magnetic powder cores to contain a large amount of non-magnetic substances, and the density will decrease, so that the magnetic properties of the magnetic powder cores will deteriorate sharply and cannot be fully utilized. Excellent soft magnetic properties of magnetic nanoparticles
At the same time, the magnetic powder core using nano-magnetic particles as the metal matrix has problems such as cumbersome preparation process and high cost.

Method used

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  • FeNi nanoparticle/epoxy resin composite coated iron-silicon magnetic powder core and preparation method thereof
  • FeNi nanoparticle/epoxy resin composite coated iron-silicon magnetic powder core and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A FeNi nanoparticle / epoxy resin composite coated iron-silicon magnetic powder core, the preparation method of which comprises the steps of:

[0037] 1) Dry mix the iron-silicon powder and FeNi nanoparticles uniformly according to the weight ratio of 95:5, wherein the amount of iron-silicon powder is 19g, and the amount of FeNi nanoparticles is 1g; the mixing time is 20min, and the mixing speed is 30r / min;

[0038] 2) Weigh 2g of silane coupling agent, add it to 10ml of absolute ethanol, and stir ultrasonically for 5 minutes to obtain silane coupling agent-ethanol solution; add the obtained mixed powder into the prepared silane coupling agent-absolute ethanol solution , ultrasonically stirred and reacted for 10 minutes; then dried in a vacuum dryer, the drying temperature was set at 60°C, and the drying time was 1 hour;

[0039] 3) Add epoxy resin accounting for 1.5% of the obtained dried powder mass into 10 ml of acetone solution, and ultrasonically disperse for 1 min t...

Embodiment 2

[0043] A FeNi nanoparticle / epoxy resin composite-coated iron-silicon magnetic powder core, the difference between its preparation method and Example 1 is that the mass ratio of iron-silicon powder to FeNi nanoparticles in step 1) is 90:10, wherein FeNi The amount of silicon powder is 18g, and the amount of FeNi nanoparticles is 2g.

Embodiment 3

[0045] A FeNi nanoparticle / epoxy resin composite coated iron-silicon magnetic powder core, the difference between its preparation method and Example 1 is that the mass ratio of iron-silicon powder to FeNi nanoparticles in step 1) is 85:5, wherein FeNi The dosage of silicon powder is 17g, and the dosage of FeNi nanoparticles is 3g.

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Abstract

The invention discloses a FeNi nano particle / epoxy resin composite coated iron-silicon magnetic powder core. A preparation method of the FeNi nano particle / epoxy resin composite coated iron-silicon magnetic powder core comprises a powder mixing step, a modification step, an insulation coating step, a drying step, a compression molding step and a vacuum annealing treatment step. The iron-silicon powder serves as a main body, the FeNi nano-particle / epoxy resin coating layer is constructed on the surface of the iron-silicon powder, and compared with an existing related product, the obtained iron-silicon magnetic powder core has the advantages of being low in magnetic loss, high in magnetic conductivity, high in product density, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of composite soft magnetic materials, and in particular relates to a FeNi nanometer particle / epoxy resin composite-coated iron-silicon magnetic powder core and a preparation method thereof. Background technique [0002] Soft magnetic composite material (also known as magnetic powder core) is a kind of soft magnetic composite material that uses magnetic powder as raw material, and after the powder surface is coated with an insulating medium layer, the powder is pressed into the required shape by powder metallurgy technology and heat-treated. Magnetic materials play the role of coupling transmission and conversion of information and energy in various devices. Due to the characteristics of high saturation magnetic flux density, high magnetic permeability and low loss, metal soft magnetic powder cores conform to the trend of electronic components in the direction of high frequency, miniaturization, high current,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F3/00H01F1/04H01F41/02
CPCH01F3/00H01F1/04H01F41/02
Inventor 杨玉焦立新董亚强宋文博黄建军杨培朱盼星苏瑶
Owner 宝武环科武汉金属资源有限责任公司
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