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A soft magnetic composite material with high permeability and low loss and a preparation method thereof

A technology of soft magnetic composite materials and high magnetic permeability, which is applied in the fields of magnetic materials, inorganic material magnetism, inductor/transformer/magnet manufacturing, etc., can solve the problems of high frequency loss and low magnetic permeability, and achieve hysteresis loss Low, improve the magnetic permeability of the magnetic ring, reduce the effect of eddy current loss

Active Publication Date: 2018-12-11
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] [Chinese patent 2012104332238 uses a magnetic field to make magnetic particles form chain clusters along the direction of the magnetic field to obtain one-way light transmission characteristics; The magnetic field orientation in the 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 phases in the matrix is ​​still too high, and the shortcomings of low magnetic permeability and high high-frequency loss are still not essential. improve

Method used

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  • A soft magnetic composite material with high permeability and low loss and a preparation method thereof
  • A soft magnetic composite material with high permeability and low loss and a preparation method thereof
  • A soft magnetic composite material with high permeability and low loss and a preparation method thereof

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Effect test

Embodiment 1

[0058] 1) Preparation of raw materials

[0059] The main magnetic phase is flake Fe powder; the interface insulating phase is glass powder and nano-manganese-zinc ferrite; flake Fe powder is prepared by ball milling; nano-manganese-zinc ferrite is prepared by sol-gel method;

[0060] 2) Insulation coating of soft magnetic alloy particles

[0061] After passivation, the soft magnetic alloy particles are fully mixed with the interface insulating phase to realize the insulation coating of the soft magnetic alloy particles; the mass fraction of the flake soft magnetic alloy is 97wt.%; the mass fraction of the insulating phase is 3wt.%, of which The mass fraction of nano-magnetic oxide is 2wt.%;

[0062] 3) Magnetic field orientation molding

[0063] During the forming process of the magnetic ring, the magnetic field is used to orient the soft magnetic alloy particles to obtain a highly ordered anisotropic magnetic ring; the magnetic field strength is 0.1T; the magnetic field orientation me...

Embodiment 2

[0070] 1) Preparation of raw materials

[0071] The main magnetic phase is flake Fe-Si powder; the interface insulating phase is water glass, epoxy resin and nano nickel zinc ferrite; flake Fe-Si powder is prepared by ball milling; nano nickel zinc ferrite is prepared by hydrothermal method synthesis;

[0072] 2) Insulation coating of soft magnetic alloy particles

[0073] After passivation, the soft magnetic alloy particles are fully mixed with the interface insulating phase to achieve insulation coating of the soft magnetic alloy particles; the mass fraction of the flake soft magnetic alloy is 98wt.%; the mass fraction of the insulating phase is 2wt.%, of which The mass fraction of nano-magnetic oxide is 1.5wt.%;

[0074] 3) Magnetic field orientation molding

[0075] During the forming process of the magnetic ring, the magnetic field is used to orient the soft magnetic alloy particles to obtain a highly ordered anisotropic magnetic ring; the magnetic field intensity is 0.5T; the ma...

Embodiment 3

[0081] 1) Preparation of raw materials

[0082] The main magnetic phase is flake Fe-Ni powder; the interface insulating phase is MgO, phenolic resin and nano-magnesium-zinc ferrite; flake-shaped Fe-Ni powder is prepared by ball milling; nano-magnesium-zinc ferrite is synthesized by solvothermal method;

[0083] 2) Insulation coating of soft magnetic alloy particles

[0084] After passivation, the soft magnetic alloy particles are fully mixed with the interface insulating phase to achieve insulation coating of the soft magnetic alloy particles; the mass fraction of the flake soft magnetic alloy is 99wt.%; the mass fraction of the insulating phase is 1wt.%, of which The mass fraction of nano-magnetic oxide is 0.5wt.%;

[0085] 3) Magnetic field orientation molding

[0086] During the forming process of the magnetic ring, the magnetic field is used to orient the soft magnetic alloy particles to obtain a highly ordered anisotropic magnetic ring; the magnetic field strength is 1T;

[0087] T...

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Abstract

The invention belongs to the field of magnetic material preparation, in particular to a soft magnetic composite material with high permeability and low loss and a preparation method thereof. The composition and structure of the soft magnetic composite material are as follows: the soft magnetic alloy particles are sheet-like structure, and all the sheet-like particles are arranged in parallel orderalong the magnetic ring plane; Filling high resistivity insulating phase between magnetic particles; The insulating phase comprises nanometer magnetic oxide; This structure improves the permeabilityof the composite material and reduces the magnetic loss in the intrinsic structure. The preparation process comprises the following steps of: fully mixing the passivated soft magnetic alloy particlesand the interface insulation phase to realize the insulation coating of the soft magnetic alloy particles; In the forming process of the magnetic ring, the soft magnetic alloy particles are oriented by magnetic field, and the highly ordered anisotropic magnetic ring is obtained. The soft magnetic composites with high orientation, high permeability and low loss isobtained by further stress relief annealing. The invention has the advantages that the highly oriented and orderly arranged sheet structure can effectively reduce the magnetic loss and improve the magnetic permeability of the compositematerial.

Description

Technical field [0001] The invention belongs to the field of magnetic material preparation, and particularly relates to a soft magnetic composite material with high magnetic permeability and low loss and a preparation method thereof. Background technique [0002] As a necessary medium for magnetoelectric conversion, soft magnetic materials are widely used in the fields of electric power, information, energy, transportation and national defense, and are important functional materials and key basic materials for the national economy. With the increasing miniaturization, light weight, high frequency, and integration of power and electronic equipment, the demand for soft magnetic materials is increasing, and soft magnetic materials are also developing in the direction of high permeability, high frequency and low loss. . Metal soft magnetic materials have high saturation magnetic flux density and permeability, which can meet the needs of miniaturization, but they have low resistivity...

Claims

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Application Information

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IPC IPC(8): H01F1/18H01F41/02
CPCH01F1/0054H01F1/18H01F41/0246
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孙家阳葛铭辉
Owner CHINA JILIANG UNIV
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