CN106413362B - Graphene grid and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device - Google Patents
Graphene grid and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device Download PDFInfo
- Publication number
- CN106413362B CN106413362B CN201510449150.5A CN201510449150A CN106413362B CN 106413362 B CN106413362 B CN 106413362B CN 201510449150 A CN201510449150 A CN 201510449150A CN 106413362 B CN106413362 B CN 106413362B
- Authority
- CN
- China
- Prior art keywords
- transparent
- layer
- graphene
- grid
- mesh
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
Abstract
Two-way transparent electromagnetic shield device of inhaling of ripples based on graphite alkene net bars and transparent conductive film belongs to optics transparency and electromagnetic shield technical field, and this electromagnetic shield device utilizes graphite alkene net bars film to have different printing opacity and the microwave shielding characteristic that demonstrates when different mesh unit open area is compared, with the low reflection of graphite alkene net bars film and the strong electromagnetic reflection characteristic organic combination of part absorption microwave characteristic and high printing opacity conductive film, arranges graphite alkene net bars film in transparent conductive film both sides and constitutes multilayer structure: using a transparent conductive film as a transparent reflecting layer, and using an N-layer graphene film separated by a transparent medium as a transparent absorbing layer; the structure can enable radio frequency radiation from two sides of the structure to pass through the transparent absorption layer for multiple times and be strongly absorbed, so that strong shielding and low reflection characteristics are realized, and visible light only penetrates through the multilayer structure once and has high light transmittance; the electromagnetic shielding optical window solves the problem that the existing transparent electromagnetic shielding method cannot give consideration to both low electromagnetic reflection, strong electromagnetic shielding and high light transmission.
Description
Technical Field
The invention belongs to the field of electromagnetic shielding of optical transparent parts, and particularly relates to a bidirectional wave-absorbing transparent electromagnetic shielding device based on a graphene grid and a transparent conductive film.
Background
With the development of broadcasting, television, wireless communication technology and microwave technology, radio frequency equipment is equipped in a large number in various places where people move, the frequency spectrum range is continuously widened, and the intensity is multiplied, so that the radio frequency equipment not only causes interference to electronic equipment, but also threatens human health. The invisible electromagnetic pollution directly acts on machines or human bodies, is an invisible killer with serious harm, and becomes the fifth largest pollution following atmospheric pollution, water pollution, solid waste pollution and noise pollution. Electromagnetic shielding (including absorption and reflection) is a major measure for preventing and treating electromagnetic pollution, and in recent years, electromagnetic shielding technology has received much attention. The electromagnetic shielding, namely transparent electromagnetic shielding, which is required in visual observation occasions is always a difficult point and a hot point, and the application of the electromagnetic shielding, namely transparent electromagnetic shielding, comprises a medical electromagnetic isolation room observation window, a communication equipment transparent electromagnetic shielding element, an aerospace equipment optical window, an advanced optical instrument optical window, a confidential facility electromagnetic leakage prevention optical window, a liquid crystal display screen, a mobile phone touch screen, a vehicle-mounted transparent antenna and the like.
At present, the difficulty of realizing transparent electromagnetic shielding mainly lies in that most of traditional wave-absorbing materials are opaque or have poor transparency, and the transparency and the conductive shielding capability of the reflection transparent shielding technology based on transparent conductive materials or devices are mutually restricted, so that high transparency and strong electromagnetic shielding are difficult to realize simultaneously. In addition, the conductive reflective transparent shielding technology reflects electromagnetic radiation back to the space, which causes secondary pollution to the space environment and is not beneficial to the thorough prevention and treatment of electromagnetic pollution.
Carbon materials play a very important role in many areas of modern technology, among the many allotropes of carbon, graphene is a very typical material, graphene being formed from carbon atoms in sp2The hexagonal honeycomb lattice planar thin film formed by the hybrid tracks is a two-dimensional material with the thickness of only one carbon atom, has multiple excellent properties, one of the outstanding properties is excellent transparent conductivity and certain microwave absorption performance, so that the graphene has high application value in the field of transparent electromagnetic shielding:
1. U.S. Pat. No. 20130068521, "graphene preparation method using graphene prepared by Chemical Vapor Deposition (CVD)" is loaded on a metal plate or a polymer substrate to realize Electromagnetic shielding, and compared with a metal plate or a polymer substrate which is not loaded with graphene, the Electromagnetic shielding efficiency of the whole structure is improved after the graphene is loaded.
2. Patent 201310232829.X "graphene-based structure and method for shielding electromagnetic radiation" describes an electromagnetic shielding structure for shielding electromagnetic radiation having a frequency greater than 1 mhz, the structure being composed of one or more layers of graphene, at least one layer of graphene being doped with a dopant.
3. Patent 201420099425.8 "a transparent electromagnetic shielding film based on graphene film" describes a transparent electromagnetic shielding film with nano-silver wires arranged between a transparent substrate and a graphene film, wherein the nano-silver wires act as a charge bridge to increase the conductivity of the whole electromagnetic shielding film and improve the shielding efficiency.
4. James M.Tour et al, Rice University (Rice University), USA, prepares a metal mesh with a line width of 5 μm by photolithography, and transfers single-layer Graphene on the surface thereof to prepare a Graphene-metal mesh mixed conductive film (James M.Tour et al, "random Design of Hybrid Graphene Films for High-Performance transmission Electrodes". ACS Nano, 2011, 5 (8): 6472-6479), which can realize a light transmittance of 90% and a sheet resistance of 20 Ω/sq.
5. Seul Ki Hong et al, Korea scientific and technical institute (KAIST), reported that the shielding efficiency of single-layer graphene was 2.27dB (Hong S K et al, "Electromagnetic interference shielding efficiency of monolayer graphene". Nanotechnology,2012,23 (45): 455704), with absorption and reflection losses of-4.38 dB and-13.66 dB, respectively.
6. Kim S of the University of Korea (Sungkyunkwan University) and Myeong-Gi, et al of the Korea three-star Motor company (Samsung Electro-Mechanics) use a polyetherimide/redox method to prepare a Graphene (PEI/RGO) laminate structure to achieve Electromagnetic Shielding (Kim S, et al, "Electromagnetic Interference (EMI) Transmission Shield of Reduced Graphene Oxide (RGO) Electromagnetic Interference disposed". AppACS plied materials & interfaces, Electromagnetic Shielding 2014,6 (20): 17647 17653), the efficiencies of the double-layer PEI/RGO and single-layer PEI/RGO laminates are 6.37 and 3.09dB, respectively, and the absorption loss accounts for 96% and 92% of the total efficiency, respectively.
7. Hanjie et al, Harbin university of Industrial science, uses a copper mesh as a sacrificial layer, and prepares a plurality of graphene meshes (Han J, et al, "isolated-transmissive film based on a modulated graphene network fabric for electronic shielding". Carbon,2015,87: 206-type 214) by Chemical Vapor Deposition (CVD), respectively achieving 70.85% Infrared transmittance and 12.86dB shielding efficiency, and achieving 87.85% Infrared transmittance and 4dB shielding efficiency. And the graphene grid electromagnetic shielding is also dominated by absorption.
According to the scheme, the graphene is used for electromagnetic shielding, and a certain electromagnetic shielding effect can be achieved. US20130068521 uses graphene as a core device of an electromagnetic shielding device, and transfers a whole large-area graphene onto substrates such as metal and polymer by a roll-to-roll graphene transfer method, so as to achieve an excellent electromagnetic shielding effect, but the electromagnetic shielding device does not have transparency. Patent 201310232829.X "graphene-based structure and method for shielding electromagnetic radiation" takes a graphene thin film as a main body of an electromagnetic shielding structure, and at least one layer of the graphene thin film is doped to improve the electromagnetic shielding efficiency, but the doping affects the light transmittance of the whole structure. Patent 201420099425.8, "a transparent electromagnetic shielding film based on graphene thin film", utilizes nano-silver wires to increase the conductivity of the graphene thin film and increase the reflection loss to achieve the improvement of the electromagnetic shielding efficiency, but the main contribution of the electromagnetic shielding is caused by reflection. In the above document 4, the graphene thin film is loaded on the metal mesh to form a structure in which the graphene and the metal mesh are tightly attached to each other, so that the conductivity of the metal mesh is improved, and meanwhile, the light transmittance reaches 91%, but the electromagnetic shielding of the structure is mainly reflected. The research results in the above-mentioned document 5 indicate that although the shielding efficiency of graphene increases greatly as the number of layers increases, the absorption loss increases little, and the light transmittance is lost by 2.3% per one layer of graphene, making it difficult to achieve high light transmittance, low reflection, and strong electromagnetic shielding at the same time with this structure. In the above document 6, the graphene thin film (RGO) and Polyetherimide (PEI) laminated structure prepared by the redox method realizes electromagnetic shielding, and the shielding mainly involves absorption loss, but the shielding efficiency of the double-layer PEI/RGO structure is only 6.37dB, and the light transmittance is only 62%, and it is difficult to realize both strong electromagnetic shielding and high light transmittance. The document 7 only adopts a graphene grid structure, so that the shielding efficiency is low, and the strong shielding efficiency and the high light transmittance cannot be achieved at the same time.
In a word, in the prior electromagnetic shielding technology, a method mainly based on reflection-type electromagnetic shielding is easy to cause secondary electromagnetic pollution; in the electromagnetic shielding method with absorption loss, either the light transmittance is not high or the electromagnetic shielding efficiency is not strong, so that it is difficult to realize high transparency and strong electromagnetic shielding at the same time.
Disclosure of Invention
The invention aims to overcome the defects of the existing transparent electromagnetic shielding technology, especially to solve the problems that transparency and conductive shielding capability in the existing reflective transparent shielding technology are mutually restricted, high light transmittance and strong microwave shielding efficiency are difficult to be considered, and electromagnetic leakage and secondary pollution are caused by reflected electromagnetic signals, and develops a bidirectional wave-absorbing transparent electromagnetic shielding device based on a graphene grid and a transparent conductive film, so that the purposes of bidirectional low electromagnetic reflection, strong electromagnetic shielding and high light transmittance are achieved.
The purpose of the invention is realized as follows: the bidirectional wave-absorbing transparent electromagnetic shielding device is based on a graphene grid and a transparent conductive film, and is formed by assembling a transparent absorption layer A, a transparent medium A, a transparent reflection layer, a transparent medium B and a transparent absorption layer B which are sequentially overlapped and arranged in parallel; the transparent absorption layers A and B are both composed of N layers of graphene grid films separated by transparent media, and the transparent reflection layer is composed of transparent conductive films and comprises transparent metal compound films, nano silver wire films or metal grids.
The good effect produced by the invention mainly focuses on realizing the bidirectional low electromagnetic reflection, strong electromagnetic shielding and high light transmittance, and specifically comprises the following steps:
firstly, electromagnetic shielding with high light transmission and absorption as main functions is realized by utilizing different light transmission and microwave shielding characteristics shown when the graphene grid film has different aperture unit opening area ratios; when the aperture area ratio t of the mesh unit of the graphene grid film is between 0.05 and 0.7, good light transmission and shielding performance can be realized by adjusting the number of layers of the graphene grid film. When the opening area ratio t of the mesh unit of the graphene grid film meets the condition that t is more than or equal to 0.3 and less than or equal to 0.7, the light transmittance which is similar to that of a single-layer graphene film is realized by utilizing the multi-layer graphene grid film, and meanwhile, the shielding performance is improved; when the opening area ratio t of the mesh unit of the graphene grid film meets the condition that t is more than or equal to 0.05 and less than 0.3, the microwave shielding performance similar to that of a single-layer graphene film is realized by utilizing the single-layer graphene grid film, and meanwhile, the light transmittance is improved; meanwhile, the microwave shielding performance of the graphene grid film is mainly microwave absorption.
Secondly, the microwave absorption characteristic of the graphene grid film and the microwave reflection characteristic of the transparent conductive film are organically combined, and the transparent conductive film is used as a transparent reflection layer to realize strong electromagnetic reflection of radio frequency radiation; the N layers of graphene grid thin film structures separated by transparent media are used as transparent absorption layers, so that radio frequency radiation can be partially absorbed and pass through the transparent absorption layers in a low-reflection mode; two groups of transparent absorption layers are respectively arranged on two sides of the transparent reflection layer, so that the microwave which penetrates through the transparent absorption layers is strongly reflected back to the transparent absorption layers, and good electromagnetic shielding is realized through reflection and multiple absorption; two groups of transparent absorption layers are respectively arranged on two sides of the transparent reflection layer to form an electromagnetic shielding device, and simultaneously absorb radio frequency radiation on the inner side and the outer side of the electromagnetic shielding device, so that the radio frequency radiation from two sides of the electromagnetic shielding device is reflected and absorbed for multiple times, and finally, bidirectional low-reflection strong electromagnetic shielding is realized.
According to the laminated structure, on one hand, due to the existence of the transparent absorption layer, the problem that secondary electromagnetic pollution is easily caused by shielding mainly based on reflection when only the transparent conductive film exists is solved; on the other hand, due to the existence of the transparent reflecting layer and the arrangement between the two groups of transparent absorbing layers, microwaves to be shielded from two sides of the electromagnetic shielding device are reflected and absorbed for multiple times, so that the problem of low shielding efficiency when only the graphene grid film absorbing layer exists is solved, the bidirectional shielding effect is achieved, and the bidirectional shielding effect is mainly absorption; meanwhile, for light waves, the light waves only penetrate through the transparent absorption layer and the transparent reflection layer once, the loss is less, and when the aperture area ratio t of the mesh unit of the graphene grid film is between 0.05 and 0.7, the graphene grid film has a periodic aperture structure, so that the light transmission performance is improved, and the high light transmission characteristic can be realized.
In conclusion, the invention can realize the most outstanding effects of the invention of simultaneously having bidirectional low electromagnetic reflection, strong electromagnetic shielding and high light transmittance.
Drawings
Fig. 1 is a schematic cross-sectional view of a bidirectional wave-absorbing transparent electromagnetic shielding device based on a graphene grid and a transparent conductive film.
Fig. 2 is a schematic structural diagram of a grid unit arrangement mode of a square-hole graphene grid.
Fig. 3 is a schematic structural diagram of a grid unit arrangement mode of a circular hole graphene grid.
Fig. 4 is a schematic structural diagram of a grid unit arrangement of a grid metal grid.
Fig. 5 is a schematic structural diagram of an arrangement mode of grid units of a circular ring metal grid.
Fig. 6 is a schematic diagram of the arrangement of grid cells of the multi-period micro-ring metal grid.
Fig. 7 is a schematic cross-sectional view of the bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive thin film according to the embodiment.
Fig. 8 is a schematic structural view of the bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive film according to the embodiment.
Description of part numbers in the figures: 1. protective layer A2, antireflection film A3, transparent absorbing layer A4, transparent medium A5, transparent reflecting layer 6, transparent medium B7, transparent absorbing layer B8, antireflection film B9, protective layer B10, square-hole graphene grid film A11, transparent medium C12, square-hole graphene grid film B13, square-hole graphene grid film C14, microring metal grid
Detailed Description
Embodiments of the invention are described in detail below with reference to the accompanying drawings:
the electromagnetic shielding device is formed by assembling a transparent absorption layer A (3), a transparent medium A (4), a transparent reflection layer (5), a transparent medium B (6) and a transparent absorption layer B (7) which are sequentially overlapped and arranged in parallel; the transparent absorbing layers A, B (3, 7) are both composed of N layers of graphene grid films separated by transparent media, and the transparent reflecting layer (5) is composed of transparent conductive films and comprises transparent metal compound films, nano silver wire films or metal grids; the graphene grid film forming the transparent absorption layers A, B (3, 7) is formed by a graphene film with a mesh array structure; the mesh array structure is a two-dimensional array structure formed by periodically arranging mesh units; the mesh units are in the shape of square holes or round holes; the mesh unit size is in the range of submicron to millimeter, and the mesh unit array period is in the range of micron to millimeter; the opening area ratio t of the mesh units is between 0.05 and 0.7; the open area ratio of the mesh unit refers to the ratio of the open area of the mesh unit to the unit area of the array period in one array period.
Arranging a single-layer or multi-layer antireflection film A (2) and a single-layer or multi-layer protective layer A (1) in parallel on the outer side part of the transparent absorption layer A (3) in sequence; a single-layer or multi-layer antireflection film B (8) and a single-layer or multi-layer protective layer B (9) are arranged in parallel on the outer side of the transparent absorption layer B (7) in sequence.
The number of graphene grid films constituting the transparent absorbing layer A, B (3, 7) is a single layer, a double layer or a triple layer, and the number of graphene grid films separated by the transparent medium may be the same or different.
When the ratio t of the open area of the mesh unit of the graphene grid film satisfies 0.3. ltoreq. t.ltoreq.0.7, the transparent absorption layer A, B (3, 7) is composed of N layers of the graphene grid film separated by a transparent medium, wherein N.ltoreq.6 { [1/(1-t) ] +1}, and [1/(1-t) ] represents a maximum positive integer not exceeding 1/(1-t).
When the ratio t of the open area of the mesh units of the graphene grid film is more than or equal to 0.05 and less than or equal to 0.3, the transparent absorption layers A, B (3 and 7) are formed by N graphene grid films separated by transparent media, wherein N is less than or equal to 6.
The light transmittance of the transparent reflecting layer (5) is more than 90%.
If the transparent reflecting layer (5) is composed of a metal mesh grid, the metal mesh grid is composed of two-dimensional plane structures in which mesh grid units are periodically arranged, the period of each mesh grid unit is in the range from submillimeter to millimeter, the width of each metal line is in the range from submicrometer to micrometer, and connecting metal for communicating the two metal lines is arranged between the adjacent mesh grid units through metal line overlapping or at the overlapping position.
If the transparent reflecting layer (5) is composed of metal grids, the metal grids are made of alloy materials with good electric conductivity, and the thickness of the alloy is larger than 100 nm.
The transparent medium A, B (4, 6) and the transparent medium manufacturing materials for separating the transparent absorbing layer A, B (3, 7) and the graphene grid film comprise common glass, quartz glass, infrared materials and transparent resin materials.
Examples
The electromagnetic shielding device is formed by assembling a transparent absorption layer 3A, a transparent medium 4A, a transparent reflection layer 5, a transparent medium 6B and a transparent absorption layer 7B which are sequentially overlapped and arranged in parallel; the transparent absorption layer 3A is composed of a single-layer graphene grid film A10, a transparent medium C11 and a single-layer graphene grid film B12 which are sequentially arranged in parallel, the transparent reflection layer is composed of a micro-ring metal grid 14, and the transparent absorption layer B7 is composed of a single-layer graphene grid film C13.
The invention has the technical effects that: when the electromagnetic shielding efficiency of the metal mesh grid is 20dB, if radio frequency radiation comes from the outer side of a transparent absorption layer A3 of the electromagnetic shielding device, the electromagnetic shielding efficiency of the invention is 24.2dB, and the absorption loss accounts for 56.8 percent of the total shielding energy; if the radio frequency radiation comes from the outer side of the transparent absorbing layer B7 of the electromagnetic shielding device, the absorption loss accounts for 51.2 percent of the total shielding energy; the electromagnetic shielding device has the advantages that strong electromagnetic shielding mainly based on absorption is realized for radio frequency radiation on two sides of the electromagnetic shielding device with the structure, the light transmittance is 88.1%, and the electromagnetic shielding device still has high light transmittance.
The invention also corresponds to other embodiments, the metal grid in the figure 7 is changed into a transparent conductive metal compound film or a nano silver wire film, and the original arrangement mode of each layer is kept unchanged, and finally, a similar effect can be obtained; the number of layers of the graphene grid thin film, which are separated by the transparent medium and are included in the transparent absorption layers on the two sides of the transparent reflection layer in fig. 7, is increased or decreased, so that the absorption loss is increased or the light transmittance is improved, and the adjustment can be correspondingly performed according to actual needs.
Claims (6)
1. Two-way transparent electromagnetic shield device of inhaling of ripples based on graphite alkene net bars and transparent conductive film, its characterized in that: the electromagnetic shielding device is formed by assembling a transparent absorption layer A (3), a transparent medium A (4), a transparent reflection layer (5), a transparent medium B (6) and a transparent absorption layer B (7) which are sequentially overlapped and arranged in parallel; the transparent absorption layers A (3) and B (7) are both composed of N layers of graphene grid films separated by transparent media, and the transparent reflection layer (5) is composed of a transparent conductive film and comprises a transparent metal compound film, a nano silver wire film or a metal grid; the graphene grid film forming the transparent absorption layers A (3) and B (7) is formed by a graphene film with a mesh array structure; the mesh array structure is a two-dimensional array structure formed by periodically arranging mesh units; the mesh units are in the shape of square holes or round holes; the mesh unit size is in the range of submicron to millimeter, and the mesh unit array period is in the range of micron to millimeter; the opening area ratio t of the mesh units is between 0.05 and 0.7; the ratio of the open area of the mesh units refers to the ratio of the open area of the mesh units to the area of the units in an array period; when the ratio t of the open area of the mesh unit of the graphene grid film satisfies 0.3 ≤ t ≤ 0.7, the transparent absorption layers A (3) and B (7) are composed of N layers of graphene grid films separated by transparent medium, wherein N ≤ 6 { [1/(1-t) ] +1}, and [1/(1-t) ] represents the maximum positive integer not exceeding 1/(1-t); when the aperture area ratio t of the mesh unit of the graphene grid film satisfies 0.05-t <0.3, the transparent absorption layers A (3) and B (7) are composed of N layers of graphene grid films separated by transparent media, wherein N is less than or equal to 6; if the transparent reflecting layer (5) is composed of a metal mesh grid, the metal mesh grid is composed of two-dimensional plane structures in which mesh grid units are periodically arranged, the period of each mesh grid unit is in the range from submillimeter to millimeter, the width of metal lines of the metal mesh grid is in the range from submicrometer to micrometer, and connecting metal for communicating the two metal lines is arranged between the adjacent mesh grid units in an overlapped mode through the metal lines or at the overlapped position.
2. The bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive thin film according to claim 1, characterized in that: arranging a single-layer or multi-layer antireflection film A (2) and a single-layer or multi-layer protective layer A (1) in parallel on the outer side part of the transparent absorption layer A (3) in sequence; a single-layer or multi-layer antireflection film B (8) and a single-layer or multi-layer protective layer B (9) are arranged in parallel on the outer side of the transparent absorption layer B (7) in sequence.
3. The bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive thin film according to claim 1, characterized in that: the layers of the graphene grid films forming the transparent absorption layers A (3) and B (7) are the same or different, and the layers of the graphene grid films are separated by transparent media.
4. The bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive thin film according to claim 1, characterized in that: the light transmittance of the transparent reflecting layer (5) is more than 90%.
5. The bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive thin film according to claim 1, characterized in that: if the transparent reflecting layer (5) is composed of metal grids, the metal grids are made of alloy materials with good electric conductivity, and the thickness of the alloy is larger than 100 nm.
6. The bidirectional wave-absorbing transparent electromagnetic shielding device based on the graphene grids and the transparent conductive thin film according to claim 1, characterized in that: the transparent media A (4) and B (6) for separating the transparent absorption layer and the transparent reflection layer and the transparent media manufacturing materials between the graphene grid films for separating the transparent absorption layer A (3) and the transparent reflection layer B (7) comprise common glass, quartz glass, infrared materials and transparent resin materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449150.5A CN106413362B (en) | 2015-07-28 | 2015-07-28 | Graphene grid and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449150.5A CN106413362B (en) | 2015-07-28 | 2015-07-28 | Graphene grid and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106413362A CN106413362A (en) | 2017-02-15 |
| CN106413362B true CN106413362B (en) | 2020-04-14 |
Family
ID=58009354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510449150.5A Active CN106413362B (en) | 2015-07-28 | 2015-07-28 | Graphene grid and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106413362B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108990625B (en) * | 2018-08-17 | 2020-11-24 | 常州大学 | Novel multi-functional graphite alkene electricity generation warmhouse booth |
| CN109856114B (en) * | 2019-01-28 | 2020-08-04 | 中国科学院半导体研究所 | Method for determining number of layers of graphene prepared by chemical vapor deposition method |
| CN112105248B (en) * | 2020-08-07 | 2021-06-15 | 中国科学院山西煤炭化学研究所 | Electromagnetic shielding film and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001111291A (en) * | 1998-10-08 | 2001-04-20 | Tokai Rubber Ind Ltd | Transparent radio wave absorber |
| CN101222840A (en) * | 2008-02-04 | 2008-07-16 | 哈尔滨工业大学 | Electromagnetic shielding optical window with double-layer pane metal gridding structure |
| JP2012099665A (en) * | 2010-11-02 | 2012-05-24 | Seiji Kagawa | Electromagnetic wave absorber |
| CN103596413A (en) * | 2012-06-14 | 2014-02-19 | 国际商业机器公司 | Graphene based structure and method for broadband electromagnetic radiation absorption at the microwave and terahertz frequencies |
| CN103763897A (en) * | 2014-02-14 | 2014-04-30 | 哈尔滨工业大学 | Multi-period driving and driven nested circular ring array electromagnetic shielding optical window with concentric circular rings |
| CN203801205U (en) * | 2014-03-06 | 2014-08-27 | 无锡格菲电子薄膜科技有限公司 | Transparent electromagnetic shielding film based on graphene film |
| CN203872219U (en) * | 2014-04-30 | 2014-10-08 | 路东琪 | Mobile phone electromagnetic radiation resisting device |
| CN203934271U (en) * | 2014-04-23 | 2014-11-05 | 常州二维碳素科技有限公司 | A kind of Graphene anti-radiation screen pad pasting |
| CN104704936A (en) * | 2012-11-16 | 2015-06-10 | Lg电子株式会社 | Method for manufacturing graphene electromagnetic wave blocking plate and microwave oven using same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011096700A2 (en) * | 2010-02-02 | 2011-08-11 | Samsung Techwin Co., Ltd. | Touch panel and method of manufacturing the same |
-
2015
- 2015-07-28 CN CN201510449150.5A patent/CN106413362B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001111291A (en) * | 1998-10-08 | 2001-04-20 | Tokai Rubber Ind Ltd | Transparent radio wave absorber |
| CN101222840A (en) * | 2008-02-04 | 2008-07-16 | 哈尔滨工业大学 | Electromagnetic shielding optical window with double-layer pane metal gridding structure |
| JP2012099665A (en) * | 2010-11-02 | 2012-05-24 | Seiji Kagawa | Electromagnetic wave absorber |
| CN103596413A (en) * | 2012-06-14 | 2014-02-19 | 国际商业机器公司 | Graphene based structure and method for broadband electromagnetic radiation absorption at the microwave and terahertz frequencies |
| CN104704936A (en) * | 2012-11-16 | 2015-06-10 | Lg电子株式会社 | Method for manufacturing graphene electromagnetic wave blocking plate and microwave oven using same |
| CN103763897A (en) * | 2014-02-14 | 2014-04-30 | 哈尔滨工业大学 | Multi-period driving and driven nested circular ring array electromagnetic shielding optical window with concentric circular rings |
| CN203801205U (en) * | 2014-03-06 | 2014-08-27 | 无锡格菲电子薄膜科技有限公司 | Transparent electromagnetic shielding film based on graphene film |
| CN203934271U (en) * | 2014-04-23 | 2014-11-05 | 常州二维碳素科技有限公司 | A kind of Graphene anti-radiation screen pad pasting |
| CN203872219U (en) * | 2014-04-30 | 2014-10-08 | 路东琪 | Mobile phone electromagnetic radiation resisting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106413362A (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106413359B (en) | Bidirectional wave-absorbing strong electromagnetic shielding optical window with multilayer graphene grid/metal grid laminated structure | |
| Lu et al. | Graphene, microscale metallic mesh, and transparent dielectric hybrid structure for excellent transparent electromagnetic interference shielding and absorbing | |
| CN112292014B (en) | Microwave transmission passband adjustable high-transmittance optical window based on phase-change material and graphene | |
| CN106058482B (en) | Transparent wideband electromagnetic wave absorbing device based on bilayer conductive film | |
| Gu et al. | Multi-layer silver nanowire/polyethylene terephthalate mesh structure for highly efficient transparent electromagnetic interference shielding | |
| CN112928492B (en) | Tunable optical transparent broadband metamaterial wave absorber based on water layer | |
| CN106413364B (en) | Graphene and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device | |
| CN113079683B (en) | High-light-transmission electromagnetic shielding film and preparation method thereof | |
| CN106413362B (en) | Graphene grid and transparent conductive film bidirectional wave-absorbing transparent electromagnetic shielding device | |
| CN106413358A (en) | Electromagnetic shielding optical window based on graphene/transparent conductive film composite structure | |
| Ma et al. | Optically transparent broadband microwave absorber by graphene and metallic rings | |
| CN113328261A (en) | Double-resonance broadband transparent metamaterial wave absorber based on toothed bending ring and square ring | |
| CN106714533B (en) | Transparent bidirectional wave-absorbing electromagnetic shielding device with graphene and double-layer metal mesh grid | |
| CN106413357B (en) | Electromagnetic shielding optical window based on graphene grid and transparent conductive film laminated structure | |
| WO2015027818A1 (en) | Manufacturing method of electromagnetic-shielding optical window with embedded metal grids | |
| CN106385791B (en) | Strong electromagnetic shielding optical window with graphene grid and double-layer metal grid composite laminated structure | |
| CN106659099B (en) | Transparent electromagnetic shielding device for graphene grids and double-layer metal grids | |
| CN111600134B (en) | Wave-absorbing metamaterial for encrypting computer display | |
| CN106413363B (en) | Double-layer grid strong electromagnetic shielding optical window with graphene interlayer and double outer absorption layers | |
| CN112867379A (en) | Transparent ultra-wideband strong electromagnetic shielding device and preparation method thereof | |
| CN106413360B (en) | Double-layer metal mesh electromagnetic shielding optical window with graphene mesh interlayer | |
| CN106413365B (en) | Strong electromagnetic shielding light window based on graphene and double-layer metal mesh grid laminated structure | |
| CN106413361B (en) | Electromagnetic shielding optical window with double graphene absorption layers and double metal mesh grid structures | |
| CN114122738B (en) | Transparent broadband electromagnetic wave absorber based on ITO resistive film | |
| CN110505798A (en) | A kind of honeycomb Meta Materials transparent microwave absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |