CN112318983A - Cobalt-based amorphous composite material convenient to form - Google Patents
Cobalt-based amorphous composite material convenient to form Download PDFInfo
- Publication number
- CN112318983A CN112318983A CN202011132173.0A CN202011132173A CN112318983A CN 112318983 A CN112318983 A CN 112318983A CN 202011132173 A CN202011132173 A CN 202011132173A CN 112318983 A CN112318983 A CN 112318983A
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- China
- Prior art keywords
- cobalt
- based amorphous
- composite material
- protective layer
- polyimide protective
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- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 54
- 239000010941 cobalt Substances 0.000 title claims abstract description 54
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 239000004642 Polyimide Substances 0.000 claims abstract description 34
- 229920001721 polyimide Polymers 0.000 claims abstract description 34
- 239000002346 layers by function Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000011241 protective layer Substances 0.000 claims description 30
- 239000010410 layer Substances 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 5
- 239000011368 organic material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005358 geomagnetic field Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000013307 optical fiber Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 2
- 239000005300 metallic glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/04—Amorphous alloys with nickel or cobalt as the major constituent
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
Abstract
The invention belongs to the technical field of manufacturing for shielding external geomagnetic fields, and particularly relates to a cobalt-based amorphous composite material convenient to form. The cobalt-based amorphous composite material comprises the following components: high-permeability cobalt-based amorphous is used as a functional layer for shielding an external magnetic field, and polyimide is filled on the upper surface and the lower surface of the functional layer for protecting the internal cobalt-based amorphous and facilitating forming. When the material is used, various magnetic shielding structures can be formed by stamping, so that the material can be directly used as a structural body, and the function of shielding an external magnetic field is achieved. Compared with the prior art, the invention has the characteristics of convenient forming, light weight, certain low-frequency magnetic field shielding effect and the like.
Description
Technical Field
The invention belongs to the technical field of manufacturing for shielding external geomagnetic fields, and particularly relates to a cobalt-based amorphous composite material convenient to form, which is particularly suitable for electronic components needing to be shielded from external magnetic field interference.
Background
In the field of inertial navigation such as optical fiber and laser, the inertial navigation system is easily interfered by the earth magnetic field, so that the zero point of the inertial navigation system is shifted and the precision is reduced. The existing magnetic field shielding scheme usually adopts permalloy with high permeability, the shielding principle is mainly that a magnetic circuit is formed by high permeability materials, magnetization distribution is changed, the magnetic field is mainly gathered on the high permeability materials by utilizing the great permeability of the high permeability materials and the permeability of an air medium, the magnetic field is prevented from passing through an internal space, and therefore the magnetic shielding effect is achieved, and the specific implementation methods are different. At present, a patent of 'ultra-thin magnetic shielding sheet material and a preparation method thereof' is provided in China (patent No. CN105669179A), the ultra-thin magnetic shielding sheet material is made of ferrite, adhesive, additive and surfactant, the thickness is 0.001-0.08mm, the whole thickness is very thin, but the ultra-thin magnetic shielding sheet material is formed by bonding the ferrite, the magnetic conductivity is low, the magnetic shielding effect is poor, and the ultra-thin magnetic shielding sheet material can only be adhered to the surface of a structure. In the domestic 'active and passive magnetic shielding method' (patent No. CN105588555A), a coil is combined with permalloy with high magnetic permeability, the shielding coefficient is high, but the structure is complex, and the method is only suitable for large-scale magnetic shielding devices. The domestic amorphous metal fiber composite magnetic shielding wallpaper adopts the combination of amorphous metal fibers and a decorative layer, and is only suitable for shielding a high-frequency electromagnetic field due to poor continuity of a magnetic circuit, and has poor shielding effect of a low-frequency magnetic field.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a composite material which is simple in forming, light in density, has certain processing capacity and is suitable for electronic components needing to be shielded from external magnetic field interference.
(II) technical scheme
In order to solve the above technical problems, the present invention provides a cobalt-based amorphous composite material that is easy to mold, the composite material comprising: the device comprises a cobalt-based amorphous functional layer, an upper polyimide protective layer and a lower polyimide protective layer; the composite material is of a sandwich structure consisting of the cobalt-based amorphous functional layer, an upper polyimide protective layer and a lower polyimide protective layer.
The cobalt-based amorphous functional layer is used as a magnetic shielding layer, and an upper polyimide protective layer and a lower polyimide protective layer which are made of organic materials are distributed on two sides of the cobalt-based amorphous functional layer to form a unified whole.
The cobalt-based amorphous functional layer is composed of high-permeability cobalt-based amorphous.
Wherein the cobalt-based amorphous functional layer is a strip with the thickness of 0.03 mm.
Wherein the thicknesses of the upper polyimide protective layer and the lower polyimide protective layer are both 0.3 mm.
Wherein the total thickness of the composite material does not exceed 1 mm.
The cobalt-based amorphous composite material has certain processing characteristics and can be simply machined through punching and punching.
When the bowl-shaped shell is used, the materials are firstly punched into a bowl-shaped shell with a required specific size through a die, and then necessary holes and gaps are prepared through a machining method;
and the coated fiber-optic gyroscope or laser gyroscope closed shell is formed outside the fiber-optic gyroscope or laser gyroscope through the upper shell and the lower shell.
(III) advantageous effects
Compared with the prior art, the invention forms the shielding layer by utilizing the high-permeability cobalt-based to form a continuous magnetic circuit, has better magnetic shielding effect, and simultaneously the upper and lower polyimide composite layers play roles in protecting and serving as a structural body.
Compared with the prior art, the invention has the following advantages:
(1) the function and the structure are integrated, so that the weight of the shielding body is greatly reduced, and the shielding body has important significance for the optical fiber gyroscope and the laser gyroscope with strict requirements on weight;
(2) the shielding coefficient can reach more than 30 times under the geomagnetic field environment, and the magnetic shielding requirements of medium and low precision fiber-optic gyroscopes and laser gyroscopes are met;
(3) compared with the traditional magnetic shielding device processed by iron-nickel alloy, the magnetic shielding device has the advantage of low cost;
(4) the die has the capability of stamping forming, can be stamped into a required shape through a die, has certain processing capability, and meets the requirement of part preparation.
Drawings
FIG. 1 is a structural diagram of the present invention, wherein 1 and 3 are polyimide protective layers for protecting an intermediate cobalt-based amorphous functional layer and for supporting a structure; 2, an intermediate cobalt-based amorphous functional layer plays a role in magnetic shielding.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the above technical problems, the present invention provides a cobalt-based amorphous composite material that is easy to mold, the composite material comprising: the device comprises a cobalt-based amorphous functional layer, an upper polyimide protective layer and a lower polyimide protective layer; the composite material is of a sandwich structure consisting of the cobalt-based amorphous functional layer, an upper polyimide protective layer and a lower polyimide protective layer.
The cobalt-based amorphous functional layer is used as a magnetic shielding layer, and an upper polyimide protective layer and a lower polyimide protective layer which are made of organic materials are distributed on two sides of the cobalt-based amorphous functional layer to form a unified whole.
The cobalt-based amorphous functional layer is composed of high-permeability cobalt-based amorphous.
Wherein the cobalt-based amorphous functional layer is a strip with the thickness of 0.03 mm.
Wherein the thicknesses of the upper polyimide protective layer and the lower polyimide protective layer are both 0.3 mm.
Wherein the total thickness of the composite material does not exceed 1 mm.
The cobalt-based amorphous composite material has certain processing characteristics and can be simply machined through punching and punching.
When the bowl-shaped shell is used, the materials are firstly punched into a bowl-shaped shell with a required specific size through a die, and then necessary holes and gaps are prepared through a machining method;
and the coated fiber-optic gyroscope or laser gyroscope closed shell is formed outside the fiber-optic gyroscope or laser gyroscope through the upper shell and the lower shell.
Example 1
The cobalt-based amorphous composite material with the magnetic shielding effect consists of two layers of polyimide and a magnetic shielding layer in the middle. The magnetic shielding layer is composed of high-permeability cobalt-based amorphous strips of 0.03mm, and organic material polyimide is distributed on two sides of the cobalt-based amorphous strips to form a unified whole.
This can be described in more detail with reference to fig. 1. As can be seen from figure 1, the cobalt-based amorphous composite material comprises 1 and 3 polyimide protective layers, the thickness of the polyimide protective layers is 0.3mm, the polyimide protective layers have certain mechanical strength and mainly play a role in protecting intermediate cobalt-based amorphous layers, meanwhile, the polyimide protective layers have certain structural strength and can be directly formed, and 2 the intermediate cobalt-based amorphous functional layers are made of high-permeability materials, the permeability of the cobalt-based amorphous materials is far higher than that of air, so that a large amount of magnetic fields are attracted to pass through the cobalt-based amorphous layers, and a magnetic shielding effect is achieved. In the using process, the die is directly formed by stamping, and meanwhile, simple operations such as hole forming and the like can be carried out by machining.
Example 2
In this embodiment, as shown in fig. 1, the cobalt-based amorphous magnetic shielding composite material is a sandwich type magnetic shielding composite material composed of an upper and a lower polyimide protective layers and a middle high magnetic permeability cobalt-based amorphous functional layer.
When the bowl-shaped shell is used, the materials are firstly punched into a bowl-shaped shell with a required specific size through a die, and then necessary holes and notches are prepared through a machining method. Usually, a closed shell for coating the fiber-optic gyroscope or the laser gyroscope is formed outside the fiber-optic gyroscope or the laser gyroscope through an upper shell and a lower shell, at the moment, the shell can play a role in shielding an external magnetic field, and the shielding coefficient is more than 30 times, so that the external magnetic field is weakened to less than one thirtieth of the original magnetic field. Therefore, the interference of an external magnetic field on the laser gyroscope and the optical fiber gyroscope is avoided, the stable work of the laser gyroscope and the optical fiber gyroscope is ensured, the precision of the laser gyroscope and the optical fiber gyroscope is improved, meanwhile, the weight of the whole structure is effectively reduced, and the method has important significance for the use of the laser gyroscope and the optical fiber gyroscope.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A cobalt-based amorphous composite material that facilitates molding, the composite material comprising: the device comprises a cobalt-based amorphous functional layer, an upper polyimide protective layer and a lower polyimide protective layer; the composite material is of a sandwich structure consisting of the cobalt-based amorphous functional layer, an upper polyimide protective layer and a lower polyimide protective layer.
2. The cobalt-based amorphous composite material convenient to mold as claimed in claim 1, wherein the cobalt-based amorphous functional layer is used as a magnetic shielding layer, and an upper polyimide protective layer and a lower polyimide protective layer of organic materials are distributed on two sides of the cobalt-based amorphous functional layer to form a unified whole.
3. The cobalt-based amorphous composite material facilitating molding according to claim 1, wherein the cobalt-based amorphous functional layer is composed of a high permeability cobalt-based amorphous.
4. The cobalt-based amorphous composite material facilitating molding according to claim 1, wherein the cobalt-based amorphous functional layer is a 0.03mm thick tape.
5. The cobalt-based amorphous composite material convenient to mold as claimed in claim 1, wherein the thickness of the upper polyimide protective layer and the thickness of the lower polyimide protective layer are both 0.3 mm.
6. The cobalt-based amorphous composite material facilitating molding according to claim 1, wherein the total thickness of the composite material is not more than 1 mm.
7. The cobalt-based amorphous composite material convenient to form of claim 1, wherein the cobalt-based amorphous composite material has certain processing characteristics and can be simply machined by punching and punching.
8. The cobalt-based amorphous composite material convenient to mold as claimed in claim 1, wherein in use, the material is firstly punched into a bowl-shaped shell with a required specific size through a mold, and then necessary holes and notches are prepared through machining means;
and the coated fiber-optic gyroscope or laser gyroscope closed shell is formed outside the fiber-optic gyroscope or laser gyroscope through the upper shell and the lower shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011132173.0A CN112318983A (en) | 2020-10-21 | 2020-10-21 | Cobalt-based amorphous composite material convenient to form |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011132173.0A CN112318983A (en) | 2020-10-21 | 2020-10-21 | Cobalt-based amorphous composite material convenient to form |
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| CN112318983A true CN112318983A (en) | 2021-02-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580687A (en) * | 2021-08-02 | 2021-11-02 | 北京卫星环境工程研究所 | Flexible layered mask structure for protecting space strong electromagnetic field comprehensive environment and manufacturing method |
| CN115515410A (en) * | 2022-09-28 | 2022-12-23 | 北京航空航天大学 | Light-weight magnetic shielding room based on iron-based amorphous material |
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| CN115515410A (en) * | 2022-09-28 | 2022-12-23 | 北京航空航天大学 | Light-weight magnetic shielding room based on iron-based amorphous material |
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Application publication date: 20210205 |