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High-conductivity amorphous soft magnetic coating

An amorphous layer, highly conductive technology, used in coatings, metal material coating processes, circuits, etc., can solve the problems of lack of conductive magnetic amorphous materials, narrow frequency band, and unsatisfactory low-frequency magnetic shielding performance.

Inactive Publication Date: 2018-10-09
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the forms of electromagnetic shielding materials mainly include the bonding of amorphous strips, the preparation of amorphous alloy films by electrochemical deposition, and the preparation of amorphous alloy powder coatings by composite methods, but the existing Fe-based amorphous alloys are used as electromagnetic shielding materials. At that time, it did not give full play to its advantages in soft magnetic properties and thermal stability, and there were still problems such as unsatisfactory low-frequency magnetic shielding performance, narrow frequency band, and difficult preparation in actual production and application.
[0005] In summary, there is still a lack of a conductive magnetic amorphous material with excellent performance in this field.

Method used

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Embodiment 1

[0056] In the present embodiment, the preferred amorphous alloy powder is iron-based amorphous alloy powder, and the specific composition is (Fe 0.76 Si 0.09 B 0.1 P 0.05 ) 99 Nb 1 .

[0057] The preparation method of the iron-based amorphous alloy powder material is as follows:

[0058] (1) The industrial-grade raw materials are prepared according to the required atomic percentage in the composition, and a master alloy ingot with a uniform composition is prepared by using a vacuum induction furnace.

[0059] (2) The obtained master alloy ingot is ground with a grinding wheel to remove surface impurities, and then placed in a multi-stage gas atomization device to obtain iron-based amorphous alloy powder. The scanning electron microscope picture of the above-mentioned amorphous alloy powder is as follows figure 1 As shown in (a), the powder has high sphericity, smooth surface and good fluidity. In the present invention, the particle size range is preferably 10 to 25 μm....

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Abstract

The invention provides a high-conductivity amorphous soft magnetic coating. The high-conductivity amorphous soft magnetic coating comprises conductive magnetic amorphous powder. The conductive magnetic amorphous powder comprises iron-based amorphous magnetic powder and a conductive amorphous layer, wherein the surface of the iron-based amorphous magnetic powder is coated with the conductive amorphous layer, and the iron-based amorphous magnetic powder comprises the components shown by the formula: (Fe0.76Si0.09B0.1P0.05)100-xMx, and in the formula, M is selected from Nb, Co, Ni, Cu, Mo, Cr, Mnand V or the combination of Nb, Co, Ni, Cu, Mo, Cr, Mn and V; x is the atomic ratio, 0<=x<=4, and the atom content of Fe in the iron-based amorphous magnetic powder is over 70%; and the conductive amorphous layer is in an amorphous state. The coating is uniform in thickness and has good compactness and conductivity.

Description

technical field [0001] The invention belongs to the technical field of surface engineering and electromagnetic compatibility, and in particular relates to a conductive magnetic amorphous powder, a preparation method thereof, and a highly conductive amorphous soft magnetic coating prepared therefrom. Background technique [0002] Electromagnetic interference and health hazards caused by electromagnetic wave radiation are becoming more and more serious, and electromagnetic shielding is one of the effective solutions. However, domestic research in the field of electromagnetic shielding is relatively lagging behind, mainly due to low shielding performance. Therefore, it is very necessary to develop "thin, light, wide and strong" new electromagnetic shielding materials that meet the needs of different environments and applications. [0003] The low-frequency (<100KHz) magnetic field has a small skin effect and low wave impedance, which makes the material's absorption and refl...

Claims

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Application Information

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IPC IPC(8): B22F1/02C23C24/04C23C18/36C23C18/50C23C18/38C23C18/42C23C18/52H01F1/153
CPCH01F1/15308H01F1/15341H01F1/15383C23C4/06C23C18/36C23C18/38C23C18/42C23C18/50C23C18/52C23C24/04B22F1/17
Inventor 黎嘉威张继君常春涛王新敏
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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