CN106497313B - A kind of high temperature resistant microwave absorbing coating and its application - Google Patents
A kind of high temperature resistant microwave absorbing coating and its application Download PDFInfo
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Abstract
The invention belongs to technical field of electronic materials, in particular to a kind of high temperature resistant electromagnetic wave microwave absorbing coating and its application in Stealth.Its technical solution is: a kind of high temperature resistant microwave absorbing coating, it includes coated at least one layer of suction wave layer (1) and two layers of heat-insulated oxidation prevention layer (2) in substrate, and two layers of heat-insulated oxidation prevention layer (2) is located at the upper and lower surfaces for inhaling wave layer (1)；Wave layer (1) is inhaled using high temperature resistant absorbent and fire resistant resin as main component, and there is electromagnetic wave absorption and anti-oxidation function；Heat-insulated oxidation prevention layer (2) is mainly made of fire resistant resin and filler, to reduce the temperature inhaled wave layer (1) at high temperature and suction wave layer (1) is prevented directly to contact with air.The present invention can be used for aircraft outer surface, realize target radar invisible in a high temperauture environment.
Description
Technical field
The invention belongs to technical field of electronic materials, in particular to a kind of high temperature resistant electromagnetic wave microwave absorbing coating and its flying
Application during device is stealthy.
Background technique
Absorbing material is to refer to the incident electromagnetic wave of decaying, and its electromagnetic energy is converted into thermal energy and dissipates or make electricity
A kind of material that magnetic wave disappears by interference.Microwave absorbing coating, which refers to, designs absorbing material by certain structure, is coated on base
Bottom surface, with a kind of functional coating of wave-sucking performance.
For aircraft in high-speed flight, along with strong airflow scouring, surface temperature is higher.This requires used
The performances such as microwave absorbing coating not only needs absorption band wide, and to have high temperature resistant, anti-oxidant, and binding force is good.
Currently, the research carried out both at home and abroad includes fire resistant resin development, high temperature resistant suction in terms of high temperature resistant microwave absorbing coating
Receive agent exploitation, anti-oxidant treatment of existing absorbent etc..
To applied mature magnetic absorbent carry out anti-oxidant treatment be study more approach at present because it
Have rich technical foundation in terms of the compatibility of other auxiliary agents such as resin, the adaptability of application environment in coating, such as adopts
Coating film is formed in absorbent surface with absorbent surface cladding process.But because absorbent occupies enough in antiradar coatings
Ratio just has certain absorbing property, and absorbent granules are small, large specific surface area, the coating layer thickness reasons such as not enough, are coated on base
The single high temperature resistant microwave absorbing coating at bottom can only improve the antioxygenic property of absorbent to a certain extent, can not thoroughly solve to inhale
The anti-oxidant problem of wave coating, in other words this coating can only resistance to instantaneous high-temperature and cannot be maintained in long-time hot environment inhale
Wave performance.
Summary of the invention
The object of the present invention is to provide a kind of high temperature resistant microwave absorbing coatings for having multilayered structure, can be in continuous high temperature environment
The middle performance for keeping microwave absorbing coating.
The technical scheme is that a kind of high temperature resistant microwave absorbing coating, it is characterized in that: it includes being coated in substrate extremely
Few one layer of suction wave layer and two layers of heat-insulated oxidation prevention layer, two layers of heat-insulated oxidation prevention layer are located at the upper surface for inhaling wave layer and following table
Face；The suction wave layer has electromagnetic wave absorption and anti-oxidation function using high temperature resistant absorbent and fire resistant resin as main component；
The heat-insulated oxidation prevention layer is mainly made of fire resistant resin and filler, to reduce the temperature inhaled wave layer at high temperature and prevent to inhale wave
Layer is directly contacted with air.
Further, above-mentioned suction wave layer is made of high temperature resistant antiradar coatings, and the high temperature resistant antiradar coatings mainly include table
Bread is covered with SiO2Carbonyl iron dust, polymethyl silicane and the bisphenol A type epoxy resin of film in the case where completely cutting off air conditions in 100~
180 DEG C of reaction 8~24 hours modified modifying epoxy resin by organosilicon and thermostable phenolic resin curing agent generated.
Further, pigments and fillers described in above-mentioned high temperature resistant antiradar coatings are mainly inorganic mineral class filler, are such as selected from
One of talcum powder, glass powder, flake asbestos etc. are a variety of；The mixed solvent is mainly dimethylbenzene, butanone, ethyl acetate
Mixture.It further include drier in high temperature resistant antiradar coatings, such as benzyl dimethylamine；Coupling agent, such as KH560；Rheological agent, such as gas phase
Silica.Further, in above-mentioned high temperature resistant antiradar coatings, by mass, 10~60 parts of carbonyl iron dust absorbent；Face is filled out
2~40 parts of material；15~45 parts of modifying epoxy resin by organosilicon；1~10 part of thermostable phenolic resin curing agent；Coupling agent 0.5-5
Part；10~50 parts of mixed solvent.
Further, it is described inhale wave layer with a thickness of 0.3~1.2mm.
Further, the fire resistant resin in the heat-insulated oxidation prevention layer is phenolic resin；The pigments and fillers are usually to aoxidize
Object ceramics, are such as selected from SiO2、ZnO2、Al2O3, one of mullite etc. or a variety of, to reduce the cure shrinkage of resin, prevent
Only cracked or stomata.
Further, the thickness in monolayer of the heat-insulated oxidation prevention layer is 0.1~0.3mm.
Above-mentioned high temperature resistant microwave absorbing coating can be coated on aircraft outer surface, to reduce the spy of the target radar in hot environment
Sign.
The present invention is by increasing separately heat-insulated oxidation prevention layer in substrate surface and suction wave layer surface, to solve to inhale the heat-insulated of wave layer
And problem of oxidation keeps required suction wave to ensure that the temperature stability of entire coating for a long time under operating temperature
Performance can be used for aircraft outer surface, realize target radar invisible in a high temperauture environment.
Detailed description of the invention
Attached drawing 1 is schematic structural view of the invention；
For coating of the present invention, in the reflectivity of 300 DEG C of high temperature real-time testings, (coating layer thickness 0.55mm, substrate are resistance to attached drawing 2
Hot stainless steel)；
For coating of the present invention, in the reflectivity of 300 DEG C of high temperature real-time testings, (coating layer thickness 1.65mm, substrate are resistance to attached drawing 3
Hot stainless steel)；
The high temperature reflectance curve that wave layer is inhaled when attached drawing 4 is no heat-insulated oxidation prevention layer (room temperature: measures at room temperature；350 DEG C:
It is measured after keeping the temperature 2 hours in 350 DEG C of baking ovens；Inhale wave thickness degree 0.50mm)；
The high temperature reflectance curve that wave layer is inhaled when attached drawing 5 is comprising heat-insulated oxidation prevention layer (room temperature: measures at room temperature；350 DEG C:
It is measured after keeping the temperature 2 hours in 350 DEG C of baking ovens；Inhale wave layer lower surface and upper surface heat-insulated oxidation prevention layer thickness be respectively 0.10mm,
0.15mm；Inhale wave thickness degree 0.50mm).
Specific embodiment
Embodiment 1: preparation high temperature resistant microwave absorbing coating
Using ammonium hydroxide, ethyl orthosilicate as raw material, using sol-gel method, it is prepared for surface coated Si O2The carbonyl iron of film
Powder absorbent.
Modifying epoxy resin by organosilicon is prepared for by patent CN201010233875.8 the method.
In mass, according to surface coated Si O210-60 parts of the carbonyl iron dust absorbent of film；2-40 parts of pigments and fillers；It is organic
15-45 parts of silicon modified epoxy resin；1-10 parts of thermostable phenolic resin curing agent；0.5-5 parts of coupling agent (KH560)；It mixes molten
The proportional region that 10-50 parts of agent weighs each raw material, above-mentioned raw materials is sufficiently mixed, in the ball mill ball milling 4h, obtains inhaling wave painting
Material.
In mass, according to 6-60 parts of pigments and fillers；15-45 parts of modifying epoxy resin by organosilicon；Thermostable phenolic resin is solid
1-10 parts of agent；0.5-5 parts of coupling agent (KH560)；The proportional region that 10-50 parts of mixed solvent weighs each raw material, by above-mentioned original
Material is sufficiently mixed, in the ball mill ball milling 4h, obtains heat-insulated resistance oxygen coating.
Using heat-resistance stainless steel plate as substrate, after the cleaned, processing such as deoil, polish, according to heat-insulated oxidation prevention layer in substrate
1, wave layer is inhaled, the order of heat-insulated oxidation prevention layer 2 successively carries out each layer spraying: every one layer of spraying, in 180 DEG C of progress solidifying and settings, when
Between be 2 hours, soaking time be 2 hours, then carry out the spraying of next coating.
Minimum, peak and median point of the present invention to antiradar coatings and heat-insulated resistance oxygen coating each component mass fraction
It does not carried out weighing, be combined into different ratio coating.Through detecting, every physical and chemical performance of the coating within the scope of said ratio
It is all satisfied coating requirements of the national standard.Prepare different-thickness clad plate, each thickness degree and clad plate number respectively according to the above method
Such as table 1.
The clad plate that table 1 is prepared using heat-resistance stainless steel as substrate
Embodiment 2: high temperature resistant microwave absorbing coating reflectance curve test
It is object, the reflectance curve in 8-18GHz of testing coating with clad plate 1,2,3,4.Attached drawing 2 is clad plate 1
In the reflectivity of 350 DEG C of high temperature real-time testings, attached drawing 3 is reflectivity of the clad plate 2 in 300 DEG C of high temperature real-time testings, and attached drawing 4 is
For clad plate 3 in the reflectivity of 300 DEG C of high temperature real-time testings, attached drawing 5 is that clad plate 4 is surveyed in room temperature and 350 DEG C of high temperature in real time respectively
The reflectivity of examination.Test method is using segmental support method described in GJB 5022-2011；High temperature real-time testing, takes flattening oven to add
Heat reaches the test of segmental support method.
Embodiment 3: high temperature resistant microwave absorbing coating reflectance test
It is object, the adhesive force of testing coating, flexibility, impact strength with clad plate 1,2,3,4.Test content reaches
To index and the test method of reference be shown in Table 2.
The test of 2 high temperature resistant microwave absorbing coating traditional performance of table
Note: high temperature (300 DEG C) adhesive force be in clad plate in Muffle furnace 300 DEG C heat preservation 2 hours after take out, be cooled to room
The coating adhesion tested after temperature.
Embodiment 4: the effect contrast test of heat-insulated oxidation prevention layer
It is influenced to test heat-insulated oxidation prevention layer to the heat-insulated and antioxygenic property for inhaling wave layer, respectively testing coating plate 3 and painting
Laminate 4 at room temperature, kept the temperature 2 hours in 350 DEG C of baking ovens after reflectivity (8-18GHz), test result is shown in attached drawing 4,5.It can be with
Find out, the presence of heat-insulated oxidation prevention layer significantly provides the high temperature absorbing property for inhaling wave layer.
Claims (7)
1. a kind of high temperature resistant microwave absorbing coating, it is characterized in that: it includes inhaling wave layer (1) and at least coated at least one layer of in substrate
Two layers of heat-insulated oxidation prevention layer (2), two layers of heat-insulated oxidation prevention layer (2) are located at the upper and lower surfaces for inhaling wave layer (1)；It is described
Wave layer (1) is inhaled using high temperature resistant absorbent and fire resistant resin as main component, and there is electromagnetic wave absorption and anti-oxidation function；It is described
Heat-insulated oxidation prevention layer (2) is mainly made of fire resistant resin and filler, to reduce the temperature inhaled wave layer (1) at high temperature and prevent to inhale
Wave layer (1) is directly contacted with air；
The suction wave layer (1) is solidified by the coating of high temperature resistant antiradar coatings, and the high temperature resistant antiradar coatings mainly include surface
It is coated with SiO2Carbonyl iron dust, polymethyl silicane and the bisphenol A type epoxy resin of film are in the case where completely cutting off air conditions in 100~180
DEG C reaction 8~24 hours modified modifying epoxy resin by organosilicon and thermostable phenolic resin curing agent generated.
2. a kind of high temperature resistant microwave absorbing coating as described in claim 1, characterized in that the high temperature resistant antiradar coatings also include face
Filler, mixed solvent, the pigments and fillers are selected from one of talcum powder, glass powder, flake asbestos or a variety of；The mixed solvent master
It to be dimethylbenzene, butanone, the mixture of ethyl acetate；It also include drier in high temperature resistant antiradar coatings；Coupling agent.
3. a kind of high temperature resistant microwave absorbing coating as claimed in claim 2, characterized in that in the high temperature resistant antiradar coatings, by matter
Meter, the surface are coated with SiO210~60 parts of the carbonyl iron dust of film；2~40 parts of pigments and fillers；Modifying epoxy resin by organosilicon
15~45 parts；1~10 part of thermostable phenolic resin curing agent；0.5~5 part of coupling agent；10~50 parts of mixed solvent.
4. a kind of high temperature resistant microwave absorbing coating as described in claim 1, characterized in that it is described inhale wave layer (1) with a thickness of 0.3~
1.2mm。
5. a kind of high temperature resistant microwave absorbing coating as described in claim 1, characterized in that the resistance to height in the heat-insulated oxidation prevention layer (2)
Warm resin is phenolic resin；The filler is selected from SiO2、ZnO2、Al2O3, one of mullite or a variety of, to reduce resin
Cure shrinkage prevents crackle or stomata.
6. a kind of high temperature resistant microwave absorbing coating as described in claim 1, characterized in that the single monolayer thick of the heat-insulated oxidation prevention layer (2)
Degree is 0.1~0.2mm.
7. a kind of application of high temperature resistant microwave absorbing coating as described in claim 1 in aircraft outer surface.
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| CN106752732A (en) * | 2017-03-30 | 2017-05-31 | 孟鋆辉 | A kind of macromolecule superconduction stealth anticorrosive paint |
| CN109836997A (en) * | 2017-09-26 | 2019-06-04 | 洛阳尖端技术研究院 | A kind of infrared stealth coating and preparation method thereof |
| CN109796624A (en) * | 2019-01-24 | 2019-05-24 | 大连东信微波技术有限公司 | Inhale wave honeycomb and preparation method thereof |
| CN110885583B (en) * | 2019-11-06 | 2021-08-10 | 航天材料及工艺研究所 | Ablation-resistant wave-absorbing anti-skid wear-resistant composite coating and preparation method thereof |
| CN110982421B (en) * | 2019-11-08 | 2021-07-30 | 航天科工武汉磁电有限责任公司 | High-temperature-resistant wave-absorbing coating and preparation method thereof |
| CN111135996A (en) * | 2020-01-08 | 2020-05-12 | 中国航空制造技术研究院 | Preparation method of medium-temperature broadband wave-absorbing coating |
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| CN101699564B (en) * | 2009-10-27 | 2011-08-24 | 泰州拓谷超细粉体材料有限公司 | Preparation method of fiber metal matrix composite broadband light and slim type radar wave camouflage coating |
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| CN101712837A (en) * | 2009-11-30 | 2010-05-26 | 浙江师范大学 | High-efficiency broadband wave-absorbing coating material and use method |
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|---|---|
| CN106497313A (en) | 2017-03-15 |
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