A kind of composite soft magnetic material and preparation method thereof

A technology of composite soft magnetic and intermediate materials, applied in the direction of magnetic materials, inorganic material magnetic, magnetic objects, etc., can solve the problems of complex production process, achieve excellent magnetic permeability performance, simple insulation treatment, and material permeability. tuning effect

Active Publication Date: 2017-12-12
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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Problems solved by technology

[0004] The technologies and methods described in the above-mentioned published patents all use the mixing of metal powder and insulating medium, but they have to go through processes such as passivation, insulation, bonding, lubrication, etc., which makes the production process very complicated. must go through a larger pressure (greater than 20t / cm 2 ) After pressing, the product can be formed

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  • A kind of composite soft magnetic material and preparation method thereof
  • A kind of composite soft magnetic material and preparation method thereof
  • A kind of composite soft magnetic material and preparation method thereof

Examples

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preparation example Construction

[0039] In the preparation method provided by the present invention, a rigid or elastic composite soft magnetic material is obtained by adjusting the type of the coating agent, and the elastic and flexible composite soft magnetic material can effectively prevent product breakage, thereby ensuring stable performance of the material.

[0040] Preferably, the insulating coating, preforming steps and pressing steps in Preparation Method 1 are as follows: firstly, the polyimide coating agent is diluted in a certain proportion with N-methylpyrrolidone diluent, and then the diluted coating agent Mix with the scales to make a slurry, and then apply the slurry. During the coating process, the orientation of the scales can be controlled by applying a magnetic field, so that the scales are arranged in overlapping layers (that is, overlapping into a layered structure); The slurry after the cloth is dried to obtain a coated sheet. The temperature of the drying treatment is preferably 80-180 ...

Embodiment 1-12

[0046] Examples 1-12 are composite soft magnetic materials prepared by the preparation method 2 of the present invention, and the specific process parameters of each example are shown in Table 1. The raw materials of embodiment 1-12 are amorphous or nanocrystalline strips, wherein the amorphous strips are made of Fe 78 Si 9 B 13 (at.%) Alloy formation, nanocrystalline ribbons are made of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The alloy (at.%) is formed, the thickness of the amorphous strip is 20 μm, and the width is 142 mm, and the thickness of the nanocrystalline strip is 18 μm, and the width is 60 mm. The specific preparation steps of the composite soft magnetic material are as follows:

[0047] (1) Carry out one-step heat treatment to amorphous or nanocrystalline ribbon, wherein, the heat treatment temperature of amorphous ribbon is respectively 380 ℃, 400 ℃ and 420 ℃, and the heat treatment time is 90 minutes; The heat treatment temperature of nanocrystalline ribbon is 510°...

Embodiment 13-22

[0059] Examples 13-22 are for preparing composite soft magnetic materials by the preparation method 1 of the present invention, and the specific process parameters of each example are shown in Table 4. The raw materials of embodiment 13-22 are all amorphous or nanocrystalline strips, wherein the amorphous strips are made of Fe 78 Si 9 B 13 (at.%) Alloy formation, nanocrystalline ribbons are made of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The alloy (at.%) is formed, the thickness of the amorphous strip is 20 μm, and the width is 142 mm, and the thickness of the nanocrystalline strip is 18 μm, and the width is 60 mm. The specific preparation steps of the composite soft magnetic material are as follows:

[0060] (1) Carry out one-step heat treatment to the amorphous or nanocrystalline strips, wherein the heat treatment temperatures of the amorphous strips are 380°C, 400°C and 420°C respectively, and the heat treatment time is 90 minutes; the heat treatment temperatures of the nanocr...

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Abstract

The invention relates to a composite soft magnetic material and a preparation method thereof, belonging to the technical field of magnetic material preparation. The material is made of insulatingly coated amorphous or nanocrystalline scales overlapped in a layered structure. The magnetic permeability range of the composite soft magnetic material is 100-1000; the preparation method is: firstly, the amorphous / nanocrystalline The strip is crushed and heat-treated to make the amorphous or nanocrystalline scales; secondly, the coating agent is diluted with a diluent in a certain proportion, and then the diluted coating agent and the scales are insulatingly coated and pre-coated. Forming treatment to obtain the insulation-coated intermediate material; finally, pressing the insulation-coated intermediate material to finally obtain the composite soft magnetic material. The novel composite soft magnetic material prepared by the preparation method of the invention has adjustable material magnetic permeability and obvious layered structure; the method is simple in insulation treatment and convenient in operation.

Description

technical field [0001] The invention relates to a composite soft magnetic material and a preparation method thereof, belonging to the technical field of magnetic material preparation. Background technique [0002] Composite soft magnetic material made of ferromagnetic metal powder mixed with insulating medium, due to the small particle size of the magnetic powder and evenly separated by the insulating medium, the eddy current loss is small, so it can be applied to higher frequencies. Conductivity and low loss, so it can be used to design and produce various high-performance electronic components, such as inductors, filters and transformers, which are widely used in electronic communications, switching power supplies and other fields. [0003] There are many methods for preparing various soft magnetic materials by mixing metal powder and insulating medium. For example, the patent publication No. CN100541678C discloses a manufacturing method of sendust powder core with a magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153H01F1/18B22F1/00
CPCH01F1/15333H01F1/15383H01F1/18B22F1/102
Inventor 卢志超朱景森刘天成刘志坚王湘粤关连宝李德仁
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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