CN113133292A - Electromagnetic wave-absorbing material and electromagnetic wave-absorbing patch - Google Patents
Electromagnetic wave-absorbing material and electromagnetic wave-absorbing patch Download PDFInfo
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- CN113133292A CN113133292A CN201911420733.XA CN201911420733A CN113133292A CN 113133292 A CN113133292 A CN 113133292A CN 201911420733 A CN201911420733 A CN 201911420733A CN 113133292 A CN113133292 A CN 113133292A
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention discloses a patch type electromagnetic wave absorbing material and an electromagnetic wave absorbing sheet, wherein the electromagnetic wave absorbing material comprises a graphite composite component and a wave absorbing component, and the graphite composite component comprises the following components in parts by weight: the electromagnetic wave-absorbing sheet is of a composite layer structure and comprises a graphite layer and a wave-absorbing layer, wherein a release film is fixedly connected between the graphite layer and the wave-absorbing layer in a bonding mode, and the release film consists of a heat transfer layer and an absorbing layer, and the electromagnetic wave-absorbing sheet has the beneficial technical effects that: compared with the heat conduction material or electromagnetic wave absorption material in the prior art, the electromagnetic wave absorption material is added, so that the wave absorption material and the wave absorption patch have good heat dissipation characteristics and good wave absorption characteristics, have good performances on mechanical properties, flexibility, weather resistance and corrosion resistance, are simple in preparation process, are beneficial to large-scale production and manufacture, have excellent heat transfer performance and wave absorption performance, and are suitable for various different sheet wave absorption materials.
Description
Technical Field
The invention relates to a wave-absorbing material and a wave-absorbing patch, in particular to an electromagnetic wave-absorbing material and an electromagnetic wave-absorbing patch.
Background
The electronic devices and electronic products operating at high speed tend to be thin, which brings about a problem of electromagnetic safety, and in particular, electromagnetic shielding of thin electronic products is a subject to be studied. Although various shielding devices exist in the prior art, products for carrying out electromagnetic shielding on thin electronic products, chips and patches are still few, and even if the products are difficult to overcome the heat dissipation problem, the wave-absorbing material or the wave-absorbing product in the prior art is difficult to fit with the electronic chip in size and is difficult to be suitable for occasions with narrow installation space, and the phenomenon of point heat sources can be generated in the aspect of heat dissipation function, and the uniform diffusion along the surface of the electronic product can not be realized.
Disclosure of Invention
The invention aims to provide an electromagnetic wave absorbing material and an electromagnetic wave absorbing patch, which solve the defects in the prior art.
The invention is realized by adopting the following technical scheme:
a patch type electromagnetic wave-absorbing material is characterized by comprising a graphite composite component and a wave-absorbing component, wherein:
the graphite composite component comprises the following components in percentage by weight: 15-18 parts of graphite powder, 17-19 parts of zinc oxide, 1-2 parts of tin dioxide powder, 4-6 parts of sulfur powder, 3-5 parts of hexamethylbenzene, 1.2-1.4 parts of a binder and 1.3-1.5 parts of a suspending agent;
the wave-absorbing component comprises the following components in percentage by weight: 45 parts of metal ion-doped barium ferrite wave-absorbing powder, 20-35 parts of butyl acrylate, 0.1-1 part of 2-hydroxyethyl methacrylate, 0.5-2 parts of sodium polyacrylate and 0.4-1 part of methyl ethyl ketone peroxide;
further, except the graphite composite component and the wave-absorbing component, the rest components are alcohol-based solvents.
An electromagnetic wave absorbing sheet is of a composite layer structure and is characterized by comprising a graphite layer and a wave absorbing layer, wherein a release film is fixedly connected between the graphite layer and the wave absorbing layer in an adhesion mode and consists of a heat transfer layer and an absorbing layer,
the heat transfer layer comprises the following components in percentage by weight: 60 parts of aluminum nitride, 8 parts of aluminum oxide, 0.5 part of cadmium red, 0.5-5 parts of polysiloxane, 1-3 parts of siloxane, 0.01-5 parts of organic tin, 0.5-8 parts of ketoxime silane and a heat conducting agent: 68-85 parts of an auxiliary agent, and 24-26 parts of an auxiliary agent;
the absorption layer comprises the following components in percentage by weight:
high-molecular binder: 8 to 10 portions of
Magnetic powder: 90 to 95 portions
Further, the thickness of the heat transfer layer is 0.10 mm.
Further, the polymer binder is polymethyl methacrylate.
The beneficial technical effects of the invention are as follows:
compared with the heat conduction material or electromagnetic wave absorption material in the prior art, the electromagnetic wave absorption material is added, so that the wave absorption material and the wave absorption patch have good heat dissipation characteristics and good wave absorption characteristics, have good performances on mechanical properties, flexibility, weather resistance and corrosion resistance, are simple in preparation process, are beneficial to large-scale production and manufacture, have excellent heat transfer performance and wave absorption performance, and are suitable for various different sheet wave absorption materials.
Drawings
Fig. 1 is a schematic structural diagram of an electromagnetic wave-absorbing patch.
Detailed Description
The invention will be better understood by the following description of embodiments thereof, but the applicant's specific embodiments are not intended to limit the invention to the particular embodiments shown, and any changes in the definition of parts or features and/or in the overall structure, not essential changes, are intended to define the scope of the invention.
A patch type electromagnetic wave absorbing material comprises a graphite composite component and a wave absorbing component, wherein:
the graphite composite component comprises the following components in percentage by weight: 15-18 parts of graphite powder, 17-19 parts of zinc oxide, 1-2 parts of tin dioxide powder, 1-2 parts of sulfur powder, 1-2 parts of hexamethylbenzene, 1.2-1.4 parts of binder, 1.3-1.5 parts of suspending agent and 0.2-0.3 part of auxiliary agent.
The wave-absorbing component comprises the following components in percentage by weight: 45 parts of metal ion-doped barium ferrite wave-absorbing powder, 20-35 parts of butyl acrylate, 0.1-1 part of 2-hydroxyethyl methacrylate, 0.5-2 parts of sodium polyacrylate and 0.4-1 part of methyl ethyl ketone peroxide;
in this embodiment, the other components except the graphite composite component and the wave-absorbing component are alcohol-based solvents.
An electromagnetic wave absorbing sheet is a composite layer structure and comprises a graphite layer and a wave absorbing layer, a release film is fixedly connected between the graphite layer and the wave absorbing layer in an adhesion mode and consists of a heat transfer layer and an absorbing layer,
the heat transfer layer comprises the following components in percentage by weight: 60 parts of aluminum nitride, 8 parts of aluminum oxide, 0.5 part of cadmium red, 0.5-5 parts of polysiloxane, 1-3 parts of siloxane, 0.01-5 parts of organic tin, 0.5-8 parts of ketoxime silane and a heat conducting agent: 68-85 parts of an auxiliary agent, and 24-26 parts of an auxiliary agent;
the absorption layer comprises the following components in percentage by weight:
high-molecular binder: 8-10 parts of magnetic powder: 90 to 95 portions
In this example, the thickness of the heat transfer layer was 0.10mm, and the polymer binder was polymethyl methacrylate.
The electromagnetic wave-absorbing material is added in the embodiment, so that the wave-absorbing material and the wave-absorbing patch have good heat dissipation characteristics and wave-absorbing characteristics, have good performances on mechanical properties, flexibility, weather resistance and corrosion resistance, are simple in preparation process, are beneficial to large-scale production and manufacture, have excellent heat transfer performance and wave-absorbing performance, and are suitable for various different slice wave-absorbing materials.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (5)
1. A patch type electromagnetic wave-absorbing material is characterized by comprising a graphite composite component and a wave-absorbing component, wherein:
the graphite composite component comprises the following components in percentage by weight: 15-18 parts of graphite powder, 17-19 parts of zinc oxide, 1-2 parts of tin dioxide powder, 4-6 parts of sulfur powder, 3-5 parts of hexamethylbenzene, 1.2-1.4 parts of a binder and 1.3-1.5 parts of a suspending agent;
the wave-absorbing component comprises the following components in percentage by weight: 45 parts of metal ion-doped barium ferrite wave-absorbing powder, 20-35 parts of butyl acrylate, 0.1-1 part of 2-hydroxyethyl methacrylate, 0.5-2 parts of sodium polyacrylate and 0.4-1 part of methyl ethyl ketone peroxide.
2. A patch type electromagnetic wave absorbing material according to claim 1, wherein the other components except the graphite composite component and the wave absorbing component are alcohol-based solvents.
3. An electromagnetic wave absorbing sheet which is a composite layer structure and is characterized by comprising a graphite layer and a wave absorbing layer in claim 1, wherein a release film is fixedly connected between the graphite layer and the wave absorbing layer in an adhesion mode and consists of a heat transfer layer and an absorption layer,
the heat transfer layer comprises the following components in percentage by weight: 60 parts of aluminum nitride, 8 parts of aluminum oxide, 0.5 part of cadmium red, 0.5-5 parts of polysiloxane, 1-3 parts of siloxane, 0.01-5 parts of organic tin, 0.5-8 parts of ketoxime silane and a heat conducting agent: 68-85 parts of an auxiliary agent, and 24-26 parts of an auxiliary agent;
the absorption layer comprises the following components in percentage by weight:
high-molecular binder: 8 to 10 portions of
Magnetic powder: 90-95 parts.
4. The electromagnetic wave absorbing sheet according to claim 3, wherein the thickness of the heat transfer layer is 0.10 mm.
5. The electromagnetic wave absorbing sheet according to claim 3, wherein the polymer binder is polymethyl methacrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420733.XA CN113133292A (en) | 2019-12-31 | 2019-12-31 | Electromagnetic wave-absorbing material and electromagnetic wave-absorbing patch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420733.XA CN113133292A (en) | 2019-12-31 | 2019-12-31 | Electromagnetic wave-absorbing material and electromagnetic wave-absorbing patch |
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| Publication Number | Publication Date |
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| CN113133292A true CN113133292A (en) | 2021-07-16 |
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| CN201911420733.XA Pending CN113133292A (en) | 2019-12-31 | 2019-12-31 | Electromagnetic wave-absorbing material and electromagnetic wave-absorbing patch |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008053383A (en) * | 2006-08-23 | 2008-03-06 | Kaneka Corp | Radiation heat, electric wave absorption and shield film |
| CN104893605A (en) * | 2015-05-21 | 2015-09-09 | 苏州斯迪克新材料科技股份有限公司 | Wave-absorbing plate for electromagnetic shielding |
| CN107189767A (en) * | 2017-05-27 | 2017-09-22 | 广州中科检测技术服务有限公司 | A kind of high interface heat transfer effect, interface heat transfer material plastic, without pickup and preparation method thereof |
-
2019
- 2019-12-31 CN CN201911420733.XA patent/CN113133292A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008053383A (en) * | 2006-08-23 | 2008-03-06 | Kaneka Corp | Radiation heat, electric wave absorption and shield film |
| CN104893605A (en) * | 2015-05-21 | 2015-09-09 | 苏州斯迪克新材料科技股份有限公司 | Wave-absorbing plate for electromagnetic shielding |
| CN107189767A (en) * | 2017-05-27 | 2017-09-22 | 广州中科检测技术服务有限公司 | A kind of high interface heat transfer effect, interface heat transfer material plastic, without pickup and preparation method thereof |
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Application publication date: 20210716 |