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Cobalt-based amorphous composite material convenient to form

An amorphous composite material and a composite material technology, which is applied in the field of manufacturing shielding the external geomagnetic field, can solve the problems of high shielding coefficient, poor magnetic shielding effect, complex structure, etc., and achieve good magnetic shielding effect, reduce weight and low cost. Effect

Pending Publication Date: 2021-02-05
西安现代控制技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the patent "ultra-thin magnetic shielding sheet material and its preparation method" has been proposed in China (patent number CN105669179A). The ultra-thin magnetic shielding sheet material is made of ferrite, adhesives, additives, and surfactants. The thickness is 0.001-0.08mm, the overall thickness is very thin, but due to the bonding of ferrite, the magnetic permeability is low, the magnetic shielding effect is poor, and it can only be pasted on the surface of the structure
"A method of active and passive magnetic shielding" in China (patent number CN105588555A), which uses a combination of coils and high-permeability permalloy, has a high shielding coefficient, but has a complex structure, and is only suitable for large-scale magnetic shielding devices
The domestic "amorphous metal fiber composite magnetic shielding wallpaper" adopts the combination of amorphous metal fiber and decorative layer. Due to the poor continuity of the magnetic circuit, it can only be applied to high-frequency electromagnetic field shielding, and the low-frequency magnetic field shielding effect is poor.

Method used

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  • Cobalt-based amorphous composite material convenient to form

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Effect test

Embodiment 1

[0034] The invention has a cobalt-based amorphous composite material with magnetic shielding effect, which is composed of two layers of polyimide and a middle layer of magnetic shielding layer. The magnetic shielding layer is composed of high-permeability cobalt-based amorphous, which is a 0.03mm strip, and the organic material polyimide is distributed on both sides of the cobalt-based amorphous to form a unified whole.

[0035] Can be based on figure 1 Describe in detail. Depend on figure 1 It can be seen that the cobalt-based amorphous composite material of the present invention is composed of 1 and 3 polyimide protective layers with a thickness of 0.3mm and a certain mechanical strength, which mainly plays the role of protecting the intermediate cobalt-based amorphous, and has Certain structural strength, can be directly formed, 2 intermediate cobalt-based amorphous functional layer, cobalt-based amorphous is a high magnetic permeability material, its magnetic permeabilit...

Embodiment 2

[0037] This embodiment consists of figure 1 It can be seen that the cobalt-based amorphous magnetic shielding composite material is a sandwich-shaped magnetic shielding composite material composed of upper and lower polyimide protective layers and a middle high magnetic permeability cobalt-based amorphous functional layer.

[0038] When in use, the above-mentioned materials are first stamped into a bowl-shaped shell with a specific size through a mold, and then the necessary openings and gaps are prepared by machining means. Usually through the upper and lower shells, a closed shell covering the fiber optic gyroscope or laser gyroscope is formed outside the fiber optic gyroscope or laser gyroscope. At this time, the shell will have a shielding effect on the external magnetic field, and the shielding factor is greater than 30 times, so that The external magnetic field weakens to less than one-thirtieth of the original magnetic field. In order to avoid the interference of the e...

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Abstract

The invention belongs to the technical field of manufacturing for shielding an external geomagnetic field, and particularly relates to a cobalt-based amorphous composite material convenient to form. According to the composition of the cobalt-based amorphous composite material, a high-magnetic-conductivity cobalt-based amorphous substance is used as a functional layer for shielding the external magnetic field, and the upper surface and the lower surface of the functional layer are filled with polyimide for protecting the internal cobalt-based amorphoussubstance and facilitating forming. When the material is used, the material can form various magnetic shielding structures through stamping, so that the material can be directly used as a structural body, and an effect of shielding the external magnetic field is achieved. Compared with the prior art, the material has the characteristics of convenience in forming, light weight, certain low-frequency magnetic field shielding effect and the like.

Description

technical field [0001] The invention belongs to the manufacturing technical field of shielding the external geomagnetic field, and in particular relates to a cobalt-based amorphous composite material which is easy to form, and is especially suitable for electronic components which need to shield the interference of the external magnetic field. Background technique [0002] In the field of inertial navigation such as optical fiber and laser, since the inertial navigation system is easily disturbed by the earth's magnetic field, the zero point of the inertial navigation system will shift and the accuracy will decrease. Existing magnetic field shielding schemes usually use high-permeability permalloy. The shielding principle mainly uses the magnetic circuit formed by high-permeability materials to change the magnetization distribution. The magnetic field is mainly Gather in high magnetic permeability materials to prevent the magnetic field from passing through the internal spac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B15/08B32B27/06B32B33/00C22C45/04H05K9/00
CPCB32B27/281B32B27/06B32B15/08B32B33/00H05K9/0081C22C45/04C22C2202/02B32B2250/03B32B2250/40B32B2307/212
Inventor 张辉杨锋张卓薛耀辉唐峰朱启举李壮李毅王晓章李晓胡健李海鹏
Owner 西安现代控制技术研究所
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