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A preparation method of a soft magnetic composite material with high permeability

A soft magnetic composite material, high permeability technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of low permeability and high frequency loss, and achieve low hysteresis loss , The effect of reducing the magnetic circuit reluctance and demagnetizing field, reducing the magnetic circuit reluctance

Active Publication Date: 2018-12-18
CHINA JILIANG UNIV
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Problems solved by technology

[0006] Chinese patent 2012104332238 uses a magnetic field to make soft magnetic alloy particles form chain clusters along the direction of the magnetic field to obtain one-way light transmission characteristics; The magnetic field orientation in the paraffin matrix is ​​used to obtain composite materials. The orientation-ordered structure can optimize the magnetic permeability or loss of the material to a certain extent, but the content of non-magnetic phase in the matrix is ​​still too high, and the shortcomings of low magnetic permeability and high high-frequency loss are still there. Substantial improvement

Method used

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  • A preparation method of a soft magnetic composite material with high permeability
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Experimental program
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Effect test

Embodiment 1

[0045] 1) Raw material preparation

[0046] The main magnetic phase is Fe-Ni powder; the interface insulating phase is MgO and magnesium zinc ferrite; the magnetic oxide is synthesized by hydrothermal method;

[0047] 2) Insulation coating of soft magnetic alloy powder

[0048] After the Fe-Ni powder is passivated, it is fully mixed with the interface insulating phase to realize the insulation coating of the soft magnetic alloy powder; the mass fraction of Fe-Ni is 98wt.%; the mass fraction of the interface insulating phase is 2wt.%. Oxide mass fraction 1.2wt.%;

[0049] 3) Preparation of orientation magnets by hot pressing and thermal deformation

[0050] The blank is obtained through a hot-pressing process, and the hot-pressing temperature is 560°C; the blank is subjected to pressure deformation through a thermal deformation process, and the pressure direction is perpendicular to the plane of the magnetic ring, the thermal deformation temperature is 800°C, and the thermal ...

Embodiment 2

[0054] 1) Raw material preparation

[0055] The main magnetic phase is Fe-Si-Al powder; the interface insulating phase is Al 2 o 3 and planar hexagonal ferrite; magnetic oxides are synthesized by hydrothermal method;

[0056] 2) Insulation coating of soft magnetic alloy powder

[0057] After the Fe-Si-Al powder is passivated, it is fully mixed with the interfacial insulating phase to realize the insulating coating of the soft magnetic alloy powder; the mass fraction of Fe-Si-Al is 98.9wt.%; the mass fraction of the interfacial insulating phase is 1.1wt.%; magnetic oxide mass fraction 0.5wt.%;

[0058] 3) Preparation of orientation magnets by hot pressing and thermal deformation

[0059] The blank is obtained through a hot-pressing process, and the hot-pressing temperature is 600°C; the blank is subjected to pressure deformation through a thermal deformation process, the pressure direction is perpendicular to the plane of the magnetic ring, the thermal deformation temperatu...

Embodiment 3

[0063] 1) Raw material preparation

[0064] The main magnetic phase is Fe powder; the interface insulating phase is glass powder and manganese zinc ferrite; the magnetic oxide is synthesized by hydrothermal method;

[0065] 2) Insulation coating of soft magnetic alloy powder

[0066] After the Fe powder is passivated, it is fully mixed with the interface insulating phase to realize the insulating coating of the soft magnetic alloy powder; the mass fraction of Fe is 97wt.%; the mass fraction of the interface insulating phase is 3wt.%; the mass fraction of magnetic oxide 2wt.%;

[0067] 3) Preparation of orientation magnets by hot pressing and thermal deformation

[0068] The blank is obtained through a hot-pressing process, and the hot-pressing temperature is 660°C; the blank is subjected to pressure deformation through a thermal deformation process, the pressure direction is perpendicular to the plane of the magnetic ring, the thermal deformation temperature is 600°C, and th...

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Abstract

The invention belongs to the field of magnetic material preparation, and particularly relates to a preparation method of a soft magnetic composite material with high permeability. A soft magnetic alloy and an insulating medium are mixed, and a soft magnetic composite material is prepared by a hot pressing and hot deformation process; the soft magnetic alloy in the hot-deformed magnet becomes a flake structure, and all the flake magnetic particles are arranged in parallel order along the magnetic ring plane (working magnetic path direction); at the same time, nanometer magnetic oxide is added into the insulating medium; and finally, high-permeability anisotropic soft magnetic composites are obtained. The invention has the advantages that the sheet structure can effectively reduce the loss and improve the magnetic permeability, the sheet soft magnetic particles oriented along the plane of the magnetic ring can be directly obtained through the hot pressing and hot deformation process, andthe anisotropic ordered magnetic structure can be obtained without the need of a magnetic field.

Description

technical field [0001] The invention belongs to the field of magnetic material preparation, and in particular relates to a preparation method of a soft magnetic composite material with high magnetic permeability. Background technique [0002] As an essential medium for magnetoelectric transformation such as power conversion, signal transmission and electromagnetic compatibility, soft magnetic materials are widely used in the fields of information, electricity, energy, transportation and national defense. They are important functional materials and key basic materials for the national economy. With the progress of informatization and industrialization in modern society, equipment and devices are increasingly miniaturized, lightweight, high-frequency, and integrated, and soft magnetic materials are also developing in the direction of high frequency, high magnetic permeability, and low loss. Traditional ferrite soft magnetic materials have high resistance and excellent high-fre...

Claims

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Application Information

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IPC IPC(8): H01F1/33H01F41/02
CPCH01F1/33H01F41/0266
Inventor 彭晓领李静杨艳婷徐靖才金红晓金顶峰洪波王新庆葛洪良
Owner CHINA JILIANG UNIV
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