A kind of iron-based soft magnetic composite magnetic powder core and preparation method thereof

A soft magnetic composite and magnetic powder core technology, which is applied in the direction of magnetic materials, magnetic objects, and inorganic materials, can solve the problems of poor insulation, poor thermal stability, and low saturation magnetic induction of magnetic powder cores, and achieve high saturation magnetic induction and thermal stability. Good stability and low iron loss

Active Publication Date: 2017-11-28
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prepared magnetic powder core has the defects of poor insulation, large iron loss, low saturation magnetic induction and poor thermal stability.

Method used

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  • A kind of iron-based soft magnetic composite magnetic powder core and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] An iron-based soft magnetic composite magnetic powder core and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0036] The first step, surface modification of iron-based alloy powder

[0037] According to the mass ratio of iron-based alloy powder powder: absolute ethanol: silane coupling agent: distilled water is 1: (6-7): (0.04-0.05): (0.20-0.25), the iron-based alloy powder, absolute ethanol , silane coupling agent and distilled water are sequentially added into the reaction vessel, and stirred at 40-45° C. for 1.5-2.0 hours to obtain a mixed solution containing surface-modified iron-based alloy powder.

[0038] The second step, preparation of core-shell heterostructure composite powder

[0039] Under stirring conditions at 40-45°C, firstly add ethyl orthosilicate to the mixed solution containing surface-modified iron-based alloy powder, then add ammonia water, and continue stirring for 8-10 hours; then u...

Embodiment 2

[0053] An iron-based soft magnetic composite magnetic powder core and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0054] The first step, surface modification of iron-based alloy powder

[0055] According to the mass ratio of iron-based alloy powder: absolute ethanol: silane coupling agent: distilled water is 1: (7-8): (0.05-0.06): (0.25-0.30), the iron-based alloy powder, absolute ethanol, The silane coupling agent and distilled water are sequentially added into the reaction container, and stirred at 45-50° C. for 2.5-3.0 hours to obtain a mixed solution containing surface-modified iron-based alloy powder.

[0056] The second step, preparation of core-shell heterostructure composite powder

[0057] Under stirring conditions at 45-50°C, first add methyl orthosilicate to the mixed solution containing surface-modified iron-based alloy powder, then add ammonia water, and continue stirring for 10-12 hours; then us...

Embodiment 3

[0071] An iron-based soft magnetic composite magnetic powder core and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0072] The first step, surface modification of iron-based alloy powder

[0073] According to the mass ratio of iron-based alloy powder: absolute ethanol: silane coupling agent: distilled water is 1: (8-9): (0.06-0.07): (0.30-0.35), iron-based alloy powder, absolute ethanol, The silane coupling agent and distilled water are sequentially added into the reaction vessel, and stirred at 50-55° C. for 1.0-1.5 hours to obtain a mixed solution containing surface-modified iron-based alloy powder.

[0074] The second step, preparation of core-shell heterostructure composite powder

[0075] Under stirring conditions at 50-55°C, firstly add ethyl orthosilicate to the mixed solution containing surface-modified iron-based alloy powder, then add ammonia water, and continue stirring for 12-14 hours; then use abso...

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Abstract

The invention relates to an iron-based soft magnetic composite magnetic powder core and a preparation method thereof. Its technical scheme is: according to the mass ratio of iron-based alloy powder: absolute ethanol: silane coupling agent: distilled water is 1: (6~10): (0.04~0.10): (0.2~0.4) the iron-based alloy powder, Add absolute ethanol, silane coupling agent and distilled water into the reaction vessel in turn, stir; add ethyl orthosilicate or methyl orthosilicate to it, then add ammonia water, continue to stir, wash, filter, and dry; then the obtained The core-shell heterogeneous structure composite powder is placed in an annealing furnace, held at 600-800°C for 1-3 hours, cooled with the furnace, and pressed into shape; finally sintered at 900-1350°C for 1-10 hours, cooled with the furnace, that is An iron-based soft magnetic composite magnetic powder core was obtained. The iron-based soft magnetic composite magnetic powder core prepared by the invention has the characteristics of good insulation performance, low iron loss, high magnetic induction, good thermal stability and improved service life at relatively high ambient temperature.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic composite magnetic powder cores. Specifically relates to an iron-based soft magnetic composite magnetic powder core and a preparation method thereof. Background technique [0002] The magnetic powder core is a composite magnetic material prepared by powder metallurgy after the soft magnetic powder is insulated and coated. According to the material that constitutes the magnetic powder core, the magnetic powder core can be divided into iron powder core, permalloy magnetic powder core, sendust magnetic powder core, amorphous magnetic powder core and nanocrystalline magnetic powder core. Iron-based magnetic powder core is a kind of magnetic material with high cost performance, which has broad application space in the fields of power factor correction circuit, pulse flyback transformer, energy storage filter inductor and line filter. However, as the operating frequency increases, the iron loss ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147H01F1/24B22F1/02B22F3/16
Inventor 樊希安王健吴朝阳李光强甘章华
Owner WUHAN UNIV OF SCI & TECH
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