Non-uniform nucleation coating treatment method of a soft magnetic composite material with high saturation magnetic flux density

A soft magnetic composite material, non-uniform nucleation technology, applied in the fields of inorganic material magnetism, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of unsuitable industrial production, high cost, complex preparation process, etc. Comprehensive magnetic properties, high saturation magnetization, uniform coating effect

Inactive Publication Date: 2019-01-25
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process, many organic substances that pollute the environment and have high cost are used, and the preparation process is complicated, which is not suitable for industrial production.

Method used

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  • Non-uniform nucleation coating treatment method of a soft magnetic composite material with high saturation magnetic flux density
  • Non-uniform nucleation coating treatment method of a soft magnetic composite material with high saturation magnetic flux density
  • Non-uniform nucleation coating treatment method of a soft magnetic composite material with high saturation magnetic flux density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 15g of iron powder (ie metal magnetic powder), in which the particle size is -200~+300 mesh iron powder accounts for 60% of the total mass, -300~+400 mesh iron powder accounts for 30% of the total mass, and the iron powder above 400 mesh accounts for 10% of the total mass. Press iron nitrate, manganese nitrate and zinc nitrate according to Mn 0.6 Zn 0.4 Fe 2 O 4 Dissolve in 50mL deionized water to prepare a metal salt solution, adjust the pH of the metal salt solution to 4 with a buffer solution prepared with acetic acid and sodium acetate, add the magnetic powder with a good ratio to the metal salt solution, and stir at a constant speed to make The metal magnetic powder and the salt solution are fully mixed, and the stirring is continued for 20 minutes, and the mixture is allowed to stand at room temperature for 3 hours, then filtered and dried to obtain the metal magnetic powder coated with the ferrite precursor. The coated metal magnetic powder was calcined at 50...

Embodiment 2

[0031] Take 20g of iron-nickel powder, in which the magnetic powder with particle size of -200~+300 mesh accounts for 50% of the total mass, the magnetic powder with particle size of -300~+400 mesh accounts for 40% of the total mass, and the magnetic powder above 400 mesh accounts for 10% of the total mass. Mix iron nitrate, manganese nitrate, and zinc nitrate into Mn 0.8 Zn 0.2 Fe 2 O 4 Dissolve in 90 mL of deionized water to prepare a metal salt solution, adjust the pH of the metal salt solution to 6 with a buffer solution prepared by acetic acid and sodium acetate, add the well-proportioned magnetic powder to the metal salt solution, and stir at a constant speed to make the metal magnetic powder and The salt solution was mixed thoroughly, stirring was continued for 30 minutes, and then allowed to stand at room temperature for 7 hours, then filtered and dried to obtain metal magnetic powder coated with ferrite precursor. The coated metal magnetic powder was calcined at 600° C....

Embodiment 3

[0037] Take 30g sendust powder, in which the magnetic powder with particle size of -200~+300 mesh accounts for 70% of the total mass, the magnetic powder with particle size of -300~+400 mesh accounts for 25% of the total mass, and the magnetic powder above 400 mesh accounts for 5% of the total mass. Mix iron nitrate, manganese nitrate, and zinc nitrate into Mn 0.5 Zn 0.5 Fe 2 O 4 Dissolve in 30mL deionized water to prepare a metal salt solution, adjust the pH of the metal salt solution to 3 with a buffer solution prepared by acetic acid and sodium acetate, add the well-proportioned magnetic powder to the metal salt solution, and stir at a constant speed to make the metal magnetic powder and The salt solution was thoroughly mixed, and the stirring was continued for 40 minutes, and then allowed to stand at room temperature for 5 hours, then filtered and dried to obtain the ferrite precursor coated metal magnetic powder. The coated metal magnetic powder was calcined at 400° C. for ...

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Abstract

The invention discloses a non-uniform nucleation coating treatment method of a soft magnetic composite material with high saturation magnetic flux density. A ferrite insulating layer was uniformly coated on the surface of metal magnetic powders by heterogeneous nucleation process, and the soft magnetic composite was prepared by bonding, pressing, high temperature annealing and spraying process. The invention has the advantages that: As that coat layer is ferromagnetic material, the magnetic dilution effect can be effectively reduce, and the soft magnetic composite material with high saturatedmagnetic flux density and high permeability can be easily prepared because of good oxidation resistance and high resistivity; the magnetic powder is uniformly coat by a heterogeneous nucleation process, and the coating layer is compact and controllable in thickness; And the coating method is superior to the existing ferrite coating process, the method is simple and suitable for industrial production.

Description

Technical field [0001] The invention relates to the technical field of preparation of magnetic materials, in particular to a method for non-uniform nucleation and insulating coating of metal soft magnetic composite materials. Background technique [0002] Soft magnetic material is a kind of ferromagnetic or ferrimagnetic material, which is easy to magnetize and demagnetize. Soft magnetic materials are the key basic materials for the national economy and national defense construction, and are widely used in electric power, communications, automobiles and other fields. Mainly include metal soft magnetic, soft ferrite and soft magnetic composite materials. Traditional soft magnetic metal has high saturation magnetic flux density, but low resistivity, so it cannot be applied to high frequency; soft ferrite has high resistivity and can be applied to high frequency, but because it is a ferrimagnetic substance, its magnetic flux density is low. It cannot meet the requirements of the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/24
CPCH01F1/24H01F41/02
Inventor 刘冬高善民王峰
Owner SHANDONG UNIV OF TECH
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