CN109651799A - Wave absorbing patch, preparation method and its application - Google Patents
Wave absorbing patch, preparation method and its application Download PDFInfo
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- CN109651799A CN109651799A CN201811566827.3A CN201811566827A CN109651799A CN 109651799 A CN109651799 A CN 109651799A CN 201811566827 A CN201811566827 A CN 201811566827A CN 109651799 A CN109651799 A CN 109651799A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2315/00—Characterised by the use of rubber derivatives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/16—Solid spheres
- C08K7/18—Solid spheres inorganic
Abstract
A kind of wave absorbing patch, preparation method and its application, belong to absorbing material field.The wave absorbing patch includes the raw material of following mass percent: rubber substrate 10-40%, plasticizer 1-4%, vulcanizing agent 1-4%, absorbing material 53-87%；Wherein, absorbing material is spherical powder.Wave absorbing patch provided by the invention successfully obtains isotropic patch by formula design and craft design, with excellent mechanical performance and absorbing property.The present invention also provides the preparation method and applications of above-mentioned wave absorbing patch.
Description
Technical field
The present invention relates to absorbing material fields, in particular to a kind of wave absorbing patch, preparation method and its application.
Background technique
Absorbing material has been widely used in the neck such as military affairs, Aeronautics and Astronautics, communication, electromagnetic protection, electromagnetic shielding
Domain.It is the good suction wave method of a kind of convenience, economy, adaptability that absorbing material, which is prepared into wave absorbing patch, and wave absorbing patch can inhale
It receives, the electromagnetic wave that decaying is incident, and electromagnetic wave energy is converted into thermal energy and dissipates or electromagnetic wave is made to disappear because of interference, be
The effective ways for reducing reflection of electromagnetic wave become realization suction because it prepares many advantages such as simple, easy to use, low in cost
The ideal measure of wave energy.
But existing wave absorbing patch is prepared by the method for calendering at present, due to the shadow of rubber rolling effect
Ring, lead to the mechanical property of wave absorbing patch and reflectivity performance occur in the horizontal direction and the vertical direction very big difference and
It is solved currently without good method, and the phenomenon that this anisotropy of wave absorbing patch seriously constrains the application of wave absorbing patch
Range reduces its use value.
Summary of the invention
The present invention is directed at least solve one of above-mentioned the technical problems existing in the prior art, it is an object of the invention to mention
For a kind of wave absorbing patch, with excellent mechanical performance and absorbing property, and in the horizontal direction with the mechanical property of vertical direction
It can be consistent substantially with reflectivity performance.
Another object of the present invention is to provide a kind of preparation methods of wave absorbing patch.
Another object of the present invention is to provide the applications that above-mentioned wave absorbing patch is used as absorbing material.
The embodiment of the present invention is achieved in that
The wave absorbing patch of embodiment according to a first aspect of the present invention comprising the raw material of following mass percent: rubber-based
Material 10-40%, plasticizer 1-4%, vulcanizing agent 1-4%, absorbing material 53-87%；Wherein, absorbing material is spherical powder；
Wherein, absorbing material is spherical powder.
Wave absorbing patch provided in an embodiment of the present invention is with the suction of rubber substrate, plasticizer, vulcanizing agent and spherical powder type
Wave material is prepared as raw material, by the way that the absorbing material of spherical powder to be distributed in rubber substrate, on the one hand can keep away
Exempt from macromolecular polymer to align, is on the other hand evenly distributed on spherical absorbing material in wave absorbing patch in all directions
Performance it is identical, thus make the wave absorbing patch being prepared in the horizontal direction with the mechanical property of vertical direction and reflectivity performance
Substantially it is consistent.
In some embodiments of the invention, rubber substrate includes millable polyurethane elastomer, ethylene propylene diene rubber, butyronitrile
One of rubber, hydrogenated nitrile-butadiene rubber, silicon rubber.
Wave absorbing patch provided in an embodiment of the present invention is mixed using specific rubber raw materials and the absorbing material of spherical powder type
Refining, can be prepared the wave absorbing patch with excellent mechanical performance, and spherical absorbing material can be made adequately to be scattered in
In rubber raw materials, keep wave absorbing patch consistent with the mechanical property of vertical direction and reflectivity performance in the horizontal direction.
In some embodiments of the invention, plasticizer includes dioctyl phthalate, dioctyl adipate, adjacent benzene two
One of formic acid dihexyl.
The embodiment of the present invention is used cooperatively using specific plasticizer with rubber substrate, can be improved the flexible of wave absorbing patch
Property and plasticity, thus effectively improve wave absorbing patch easy processing degree, it is easy to process and production.
In some embodiments of the invention, vulcanizing agent includes sulphur, Triallyl isocyanurate, peroxidating diisopropyl
One of benzene.
The embodiment of the present invention carries out vulcanizing treatment to rubber substrate using specific vulcanizing agent, can improve wave absorbing patch
Mechanical performance, the effective elasticity for improving wave absorbing patch, heat resistance and draws high intensity.
In some embodiments of the invention, absorbing material include carbonyl iron dust, iron alloy powder, ferrite powder, in carbon black
One kind.
Selecting, there is the ferrous alloy powder of spherical powder type or carbon black to be added in rubber raw materials as absorbing material, can mention
Make while high wave absorbing patch absorbing property wave absorbing patch in the horizontal direction with the mechanical property of vertical direction and reflectivity performance
Unanimously.
The preparation method of the wave absorbing patch of embodiment according to a second aspect of the present invention comprising following steps: by rubber-based
It is kneaded after material, plasticizer, vulcanizing agent and absorbing material mixing, compacting, vulcanization.
The preparation method of wave absorbing patch provided in an embodiment of the present invention makes spherical powder by mixing, being kneaded by various raw materials
The absorbing material of figure is adequately dispersed in rubber substrate, and by carrying out vulcanizing treatment, Neng Gouyou after compacting operation molding
Effect avoids guaranteeing since rolling effect makes macromolecular polymer align influence absorbing property in wave absorbing patch process
The wave absorbing patch being prepared is consistent with the mechanical property of vertical direction and reflectivity performance in the horizontal direction.
In some embodiments of the invention, the length and width of the mold used when the mold used when compacting and vulcanization
Unanimously, and when suppressing the depth of the mold used is the 110%-120% of the depth of the mold used when vulcanization.
The embodiment of the present invention can be avoided by using in compacting and vulcanizing the consistent mold of length and width in tradition
Wave absorbing patch edge aligns high polymer macromolecular along rolling direction by big shearing force in calender line, protects
It is consistent with the mechanical property of vertical direction and reflectivity performance in the horizontal direction to demonstrate,prove wave absorbing patch.
In some embodiments of the invention, the material being kneaded is made to handle 25- by roller extrusion shearing in mixing process
40 times.
Make mixed rubber material by the enough numbers of roller in mixing process, can effectively improve rubber-based
The uniformity coefficient of the auxiliary materials such as material, absorbing material and plasticizer, vulcanizing agent mixing guarantees to obtain the wave absorbing patch haveing excellent performance.
The application of embodiment, wave absorbing patch are used as absorbing material according to a third aspect of the present invention.
The embodiment of the present invention by be added in rubber substrate spherical powder type absorbing material and auxiliary material plasticizer, vulcanization
The patch with excellent mechanical performance and absorbing property can be prepared in agent.
In some embodiments of the invention, the horizontal direction of wave absorbing patch and the mechanical property of vertical direction and reflectivity
Unanimously.
Wave absorbing patch provided in an embodiment of the present invention overcomes the anisotropic defect of existing absorbing material, and in level
Direction is consistent with the mechanical property of vertical direction and reflectivity, has expanded the application range of wave absorbing patch.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The wave absorbing patch of the embodiment of the present invention, preparation method and its application are specifically described below.
The embodiment of the present invention provides a kind of wave absorbing patch comprising the raw material of following mass percent: 10-40% rubber-based
Material, 1-4% plasticizer, 1-4% vulcanizing agent and 53-87% absorbing material；Wherein, absorbing material is spherical powder.
Optionally, the mass percent of the rubber substrate contained in wave absorbing patch can be respectively 10-40% or 15-
35% or 20-30%, for example, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 27%, 29%, 31%, 33%,
36%, 38%.
Further, the mass percent of the rubber substrate contained in wave absorbing patch can for 1%, 1.5%, 2%,
2.5%, 3%, 3.5%, 4%.
Further, the mass percent of the vulcanizing agent contained in wave absorbing patch can for 1%, 1.5%, 2%, 2.5%,
3%, 3.5%, 4%.
Further, the mass percent of the absorbing material contained in wave absorbing patch can be respectively 53-87% or 60-
85% or 65-80% or 70-75%, for example, 56%, 58%, 61%, 63%, 66%, 68%, 71%, 73%, 76%,
78%, 81%.
In some optionally embodiments, rubber substrate includes millable polyurethane elastomer, ethylene propylene diene rubber, butyronitrile rubber
One of glue, hydrogenated nitrile-butadiene rubber, silicon rubber.In other embodiments, silicon rubber can select dimethyl silicone rubber, methyl
Vinylsiloxane rubber, methyl vinyl phenyl silicon rubber, methyl ethylene trifluoro propyl silicon rubber, phenylene silicone rubber, sub- benzene
Ether silicon rubber, nitrile silicone rubber, silicon boron rubber.
In some optionally embodiments, plasticizer includes dioctyl phthalate, dioctyl adipate, O-phthalic
One of sour dihexyl.
In some optionally embodiments, vulcanizing agent includes sulphur, Triallyl isocyanurate, cumyl peroxide
One of.
In some optionally embodiments, absorbing material include carbonyl iron dust, iron alloy powder, ferrite powder, in carbon black
It is a kind of.Wherein absorbing material is spherical powder, and the partial size of absorbing material can be 1-100 μm or 10-90 μm or 20-80 μ
M or 30-70 μm or 40-60 μm or 50-55 μm, for example, 5 μm, 15 μm, 25 μm, 35 μm, 45 μm, 55 μm, 65 μm, 75 μm,
85 μm, 95 μm.
The present invention also provides the preparation methods of above-mentioned wave absorbing patch comprising following steps: by rubber substrate, plasticising
It is kneaded after agent, vulcanizing agent and absorbing material mixing, compacting, vulcanization.In some alternative embodiments, by rubber substrate, plasticising
Agent, vulcanizing agent and absorbing material are put into open mill or mixer and are prepared by mixing into sizing material, then using the first mold of band
Platen-press is suppressed to form raw cook, and raw cook vulcanization is finally prepared into wave absorbing patch using the vulcanizing press of the second mold of band.
In some alternative embodiments, the length and width when the first mold and vulcanization using the second mold are used when compacting
Degree is consistent, and the use of the depth of the first mold is when vulcanizing using the 110%-120% of the depth of the second mold when compacting.Pass through
The consistent mold of length and width is used in compacting and sulfidation, can guarantee the wave absorbing patch all directions of compression moulding by
Power is balanced, keeps the dimension and weight regularity of wave absorbing patch, thus obtain horizontal direction and vertical direction mechanical property and
The wave absorbing patch that reflectivity performance is consistent substantially.The first die depth used in pressing process is sulfidation simultaneously
The 110%-120% of second mold of middle use, can control the size for the wave absorbing patch being prepared.
In some alternative embodiments, the material being kneaded is made to handle 25-40 by roller extrusion shearing in mixing process
It is secondary.It first mixes raw material in mixing process and forms sizing material, so that sizing material is iterated through transfer roller thin 25-40 times logical, with
It is uniformly mixed the various raw materials such as rubber substrate, absorbing material and plasticizer, vulcanizing agent adequately.Wherein, it is thin it is logical be this field
Specialized vocabulary, i.e., by rubber raw materials very thin thickness by roller carry out extrusion shearing processing, to utilize mechanical shear stress
Long chain is fragmented into small molecule chain to reduce viscosity, each raw material is promoted to be uniformly mixed.
The present invention also provides the applications that above-mentioned wave absorbing patch is used as absorbing material, wherein the level of wave absorbing patch
Direction is consistent with the mechanical property of vertical direction and reflectivity.The embodiment of the present invention is by using specific raw material and preparation method
The wave absorbing patch that the mechanical property and reflectivity performance that horizontal direction and vertical direction can be prepared are consistent substantially is dashed forward
The anisotropic limitation of wave absorbing patch has been broken, its application range is expanded.
Embodiment 1
The embodiment of the invention provides a kind of wave absorbing patch, through the following steps that being prepared:
Weigh raw material by mass percentage, 35% millable polyurethane elastomer, 3% dioctyl phthalate, 3%
Sulphur and 59% spherical carbon black, the granularity of carbon black (sieved between 25-50 μm using the sieve of 25 μm and 50 μm sieve pores
It obtains, similarly hereinafter)；
Weighed raw material is successively put into and is mixed to get sizing material in open mill, and is using open mill that sizing material is thin 30 times logical
It is uniformly mixed, obtains rubber compound；
Sizing material is pressed into raw cook using the platen-press of the first mold of band；
Raw cook is vulcanized to get wave absorbing patch using the vulcanizing press of the second mold of band.
Embodiment 2
The embodiment of the invention provides a kind of wave absorbing patch, through the following steps that being prepared:
Raw material, 30% nitrile rubber, 2.5% dioctyl adipate, 2.5% peroxidating are weighed by mass percentage
Diisopropylbenzene (DIPB) and 65% spherical ferrite powder, the granularity of ferrite powder is between 80-100 μm；
Weighed raw material is successively put into and is mixed to get sizing material in open mill, and is using open mill that sizing material is thin 25 times logical
It is uniformly mixed, obtains rubber compound；
Sizing material is pressed into raw cook using the platen-press of the first mold of band；
Raw cook is vulcanized to get wave absorbing patch using the vulcanizing press of the second mold of band.
Embodiment 3
The embodiment of the invention provides a kind of wave absorbing patch, through the following steps that being prepared:
Raw material, 25% hydrogenated nitrile-butadiene rubber, 2% dihexyl phthalate, the three of 2% are weighed by mass percentage
Allyl iso cyanurate and 71% spherical iron alloy powder, the granularity of iron alloy powder is between 50-80 μm；
Weighed raw material is successively put into and is mixed to get sizing material in open mill, and is using open mill that sizing material is thin 35 times logical
It is uniformly mixed, obtains rubber compound；
Sizing material is pressed into raw cook using the platen-press of the first mold of band；
Raw cook is vulcanized to get wave absorbing patch using the vulcanizing press of the second mold of band.
Embodiment 4
The embodiment of the invention provides a kind of wave absorbing patch, through the following steps that being prepared:
Raw material, 20% dimethyl silicone rubber, 1.5% dioctyl adipate, 1.5% mistake are weighed by mass percentage
The spherical iron alloy powder of diisopropylbenzene (DIPB) and 77% is aoxidized, the granularity of iron alloy powder is between 30-60 μm；
Weighed raw material is successively put into and is mixed to get sizing material in open mill, and is using open mill that sizing material is thin 40 times logical
It is uniformly mixed, obtains rubber compound；
Sizing material is pressed into raw cook using the platen-press of the first mold of band；
Raw cook is vulcanized to get wave absorbing patch using the vulcanizing press of the second mold of band.
Embodiment 5
The embodiment of the invention provides a kind of wave absorbing patch, through the following steps that being prepared:
Raw material, 15% ethylene propylene diene rubber, 1% dioctyl phthalate, the three of 1% are weighed by mass percentage
Allyl iso cyanurate and 83% spherical carbonyl iron dust, the granularity of carbonyl iron dust is between 10-30 μm；
Weighed raw material is successively put into and is mixed to get sizing material in open mill, and is using open mill that sizing material is thin 32 times logical
It is uniformly mixed, obtains rubber compound；
Sizing material is pressed into raw cook using the platen-press of the first mold of band；
Raw cook is vulcanized to get wave absorbing patch using the vulcanizing press of the second mold of band.
Comparative example
This comparative example provides a kind of wave absorbing patch, through the following steps that being prepared:
Weigh raw material by mass percentage, 35% mixed milling type ethylene propylene diene rubber, 4% dioctyl phthalate,
4% sulphur and 57% sheet ferrite powder, the granularity of ferrite powder is between 30-60 μm；
Weighed raw material is successively put into and is mixed to get sizing material in open mill, and is using open mill that sizing material is thin 15 times logical
It is uniformly mixed, obtains rubber compound；
Sizing material is rolled into raw cook using tri-roll press machine；
Raw cook is vulcanized to get wave absorbing patch using the vulcanizing press of the second mold of band.
The wave absorbing patch that the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 and comparative example are provided
Performance detection is carried out respectively, and the results are shown in Table 1.
As described in Table 1, the wave absorbing patch that the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 provide
Mechanical performance and absorbing property performance be superior to comparative example offer wave absorbing patch.
In conclusion wave absorbing patch provided in an embodiment of the present invention, with excellent mechanical performance and absorbing property, and
It is consistent substantially with the mechanical property of vertical direction and reflectivity performance in the horizontal direction, can be considered isotropism.The present invention
The preparation method simple process for the wave absorbing patch that embodiment provides, it is easy to operate, it is suitble to large-scale production preparation.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of wave absorbing patch, which is characterized in that it includes the raw material of following mass percent:
Wherein, the absorbing material is spherical powder.
2. wave absorbing patch according to claim 1, which is characterized in that the rubber substrate includes blending-type polyurethane rubber
One of glue, ethylene propylene diene rubber, nitrile rubber, hydrogenated nitrile-butadiene rubber, silicon rubber.
3. wave absorbing patch according to claim 1, which is characterized in that the plasticizer include dioctyl phthalate,
One of dioctyl adipate, dihexyl phthalate.
4. wave absorbing patch according to claim 1, which is characterized in that the vulcanizing agent includes sulphur, triallyl isocyanide
One of urea acid esters, cumyl peroxide.
5. wave absorbing patch according to claim 1, which is characterized in that the absorbing material includes carbonyl iron dust, ferroalloy
One of powder, ferrite powder, carbon black.
6. the preparation method of wave absorbing patch as described in claim 1, which is characterized in that it is the following steps are included: by rubber-based
It is kneaded after material, plasticizer, vulcanizing agent and absorbing material mixing, compacting, vulcanization.
7. the preparation method of wave absorbing patch according to claim 6, which is characterized in that use mold and institute when the compacting
It states consistent using the length and width of mold when vulcanization, and uses mould when the use of the depth of mold being the vulcanization when compacting
The 110%-120% of the depth of tool.
8. the preparation method of wave absorbing patch according to claim 6, which is characterized in that make mixing in the mixing process
Material is handled 25-40 times by roller extrusion shearing.
9. the application of wave absorbing patch as described in claim 1, which is characterized in that the wave absorbing patch makes as absorbing material
With.
10. the application of wave absorbing patch according to claim 9, which is characterized in that the horizontal direction of the wave absorbing patch with
The mechanical property of vertical direction is consistent with reflectivity.
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Cited By (5)
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| CN110970733A (en) * | 2019-11-12 | 2020-04-07 | 航天科工武汉磁电有限责任公司 | Broadband strong-absorption high-temperature-resistant wave-absorbing patch and preparation method thereof |
| CN111909524A (en) * | 2020-04-16 | 2020-11-10 | 深圳和畅电磁材料有限公司 | Silica gel wave-absorbing material for high-frequency welding and preparation method thereof |
| CN112659662A (en) * | 2020-12-07 | 2021-04-16 | 航天特种材料及工艺技术研究所 | Wave-absorbing patch/hard substrate adhesive composite structure and preparation method thereof |
| CN113583352A (en) * | 2021-08-19 | 2021-11-02 | 南京冠旭新材料科技有限公司 | Wave-absorbing patch and preparation method thereof |
| CN114179449A (en) * | 2021-11-25 | 2022-03-15 | 广州金南磁性材料有限公司 | Wave-absorbing material for folding screen and preparation method and application thereof |
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