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Soft magnetic composite material and preparation method and application thereof

A soft magnetic composite material and magnetic powder technology, which is applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of high noise and high magnetic loss, and achieve low eddy current loss, low magnetic loss, Effect of reducing eddy current loss

Pending Publication Date: 2021-10-22
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high magnetic loss and high noise of soft magnetic composite materials that meet the requirements of power frequency work in the prior art, thereby providing a soft magnetic composite material and its preparation method and application

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  • Soft magnetic composite material and preparation method and application thereof

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Embodiment 1

[0041] This embodiment provides a soft magnetic composite material and a preparation method thereof, comprising the following steps,

[0042] (1) Use the aerosol method to carry out particle size classification on the alloy matrix powder, and then fully mix it evenly. The particle size of the alloy matrix powder after particle size classification is 100 mesh; wherein, in terms of atomic percentage, the alloy matrix powder includes 81.2wt% Fe, 4wt% %Si, 3wt% Al, 0.8wt% B, 6wt% Ni, 2wt% Nb and 3wt% N; wherein, N is added in the form of SiN powder.

[0043] (2) Add the nano-oxide suspension and instant sodium silicate powder to the alloy matrix powder obtained in step (1), stir evenly to form a slurry, heat and keep stirring at 50°C until the slurry is dry, fully Grinding and drying the slurry and sieving through a 50-mesh particle size to obtain magnetic powder coated with an insulating layer; wherein the nano-oxide suspension includes 10% PbPdO 2 and SiO with a mass fraction o...

Embodiment 2

[0046] This embodiment provides a soft magnetic composite material and a preparation method thereof, comprising the following steps,

[0047] (1) Use the aerosol method to carry out particle size classification on the alloy matrix powder, and then fully mix it evenly. The particle size of the alloy matrix powder after particle size classification is 400 mesh; wherein, in terms of atomic percentage, the alloy matrix powder includes 80.3wt% Fe, 6wt% %Si, 5wt% Al, 0.2wt% B, 8wt% Ni, 0.3wt% Nb and 0.2wt% N; N was added in the form of SiN powder.

[0048] (2) Add the nano-oxide suspension and the instant sodium silicate powder to the alloy matrix powder obtained in step (1), stir evenly to form a slurry, heat and keep stirring at 80°C until the slurry is dry, fully Grinding and drying the slurry and passing through 100 mesh particle size screening to obtain magnetic powder coated with an insulating layer; wherein the nano-oxide suspension contains 15% PbPdO 2 and SiO with a mass f...

Embodiment 3

[0051] This embodiment provides a soft magnetic composite material and a preparation method thereof, comprising the following steps,

[0052] (1) Use the aerosol method to carry out particle size classification on the alloy matrix powder, and then fully mix it evenly. The particle size of the alloy matrix powder after particle size classification is 200 mesh; wherein, in terms of atomic percentage, the alloy matrix powder includes 80wt% Fe, 3wt% Si, 9wt% Al, 0.5wt% B, 2wt% Ni, 1.5wt% Nb and 4wt% N; N was added in the form of SiN powder.

[0053] (2) Add the nano-oxide suspension and instant sodium silicate powder to the alloy matrix powder obtained in step (1), stir evenly to form a slurry, heat and keep stirring at 60°C until the slurry is dry, fully Grinding the dried slurry and sieving through 80 mesh particle size to obtain magnetic powder coated with an insulating layer; wherein, the nano-oxide suspension contains 13% PbPdO 2 and SiO with a mass fraction of 7% 2 , PbPdO...

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Abstract

The invention belongs to the technical field of magnetic functional material preparation, and particularly relates to a soft magnetic composite material and a preparation method and application thereof. The method comprises the following steps: (1) carrying out size grading on an alloy raw material by adopting an aerosol method to obtain alloy matrix powder; (2) adding an insulating agent and a binding agent into the alloy matrix powder obtained in the step (1) and evenly stirring to form slurry, heating the slurry until the slurry is dried, and obtaining insulating layer coated magnetic powder, wherein the insulating agent comprises nano oxide suspension liquid, and the nano oxide suspension liquid comprises oxide containing lead and palladium; and (3) carrying out hydraulic forming and heat treatment on the magnetic powder coated with the insulating layer to obtain the soft magnetic composite material. The soft magnetic composite material prepared by the method has the advantages of high resistivity, low magnetic loss, low eddy-current loss, low noise and the like, and can meet the working requirement of power frequency (50-100Hz), and the noise of a reactor iron core prepared from the soft magnetic composite material is lower than 45dB.

Description

technical field [0001] The invention belongs to the technical field of magnetic functional material preparation, and in particular relates to a soft magnetic composite material and a preparation method and application thereof. Background technique [0002] Soft magnetic materials are the earliest magnetic functional materials developed by human beings. From the end of the 19th century to the present, its development has experienced electrical pure iron, Fe-Si alloy (silicon steel), Fe-Ni alloy (permalloy), Fe-Al alloy, Fe-Si-Al alloy, Fe-Co alloy, soft magnet Oxygen body and amorphous nanocrystalline alloy and other systems. At present, silicon steel and soft magnetic ferrite are the most widely used soft magnetic materials, and amorphous alloys are the most popular research direction in the field of soft magnetism in the past two decades. However, as mentioned above, soft magnetic alloys such as silicon steel and amorphous have significant disadvantages as soft magnetic c...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/33H01F27/255
CPCH01F41/0266H01F41/02H01F1/33H01F27/255
Inventor 杨富尧刘洋吴鹏满思达高洁吴益明马光陈新韩钰程灵何承绪苏海林
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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