CN110499078B - Preparation method and application of radar antenna housing or antenna window compressive stress coating - Google Patents
Preparation method and application of radar antenna housing or antenna window compressive stress coating Download PDFInfo
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- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 229910003910 SiCl4 Inorganic materials 0.000 claims abstract description 10
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000003960 organic solvent Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 4
- 229920000053 polysorbate 80 Polymers 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 239000008096 xylene Substances 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
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- 238000010521 absorption reaction Methods 0.000 abstract description 3
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- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
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- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 description 13
- 229910052681 coesite Inorganic materials 0.000 description 12
- 229910052906 cristobalite Inorganic materials 0.000 description 12
- 229910052682 stishovite Inorganic materials 0.000 description 12
- 229910052905 tridymite Inorganic materials 0.000 description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 description 10
- 230000035882 stress Effects 0.000 description 8
- 229910052580 B4C Inorganic materials 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
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- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
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- 239000011734 sodium Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Details Of Aerials (AREA)
Abstract
The invention provides a preparation method of a radar antenna housing/antenna window compressive stress coating, which takes PVA aqueous solution as an adhesive material, and B is heated and physically stirred4The C particles and the surfactant are uniformly dispersed, so that SiCl is ensured4The hydrolysis is more sufficient and uniform; by using SiCl4The hydrolysis and the high-temperature sintering of the organic silicon resin form a pressure stress layer on the surface of the antenna housing/antenna window on the premise of not influencing the base material, so that the local tensile stress on the surface of the antenna housing/antenna window material in the stress process is relieved. The compressive stress coating can greatly reduce the moisture absorption performance of the radome/antenna window, improve the mechanical property and the heat resistance of the radome/antenna window, and has good dielectric property. Meanwhile, the coating prepared by the method is coated on the surface of the radome/antenna window, the strength is improved by 20% or more, and the use requirement of the radome/antenna window in harsh environment can be met.
Description
Technical Field
The invention belongs to the field of high-technology coating preparation, and particularly relates to a radar antenna housing or antenna window compressive stress coating and a preparation method thereof.
Background
Quartz fiber reinforced quartz-based composite material (SiO)2/SiO2) Due to good mechanical property and dielectric property, the material has a huge application prospect in the field of radar antenna housing/antenna window, and has been successfully applied to American trident buried missiles. However, due to SiO2Porous structure of itself and hydrophilic groups on the surface, SiO2/SiO2The radome/antenna window is very easy to absorb moisture in the air, and the mechanical property and the wave transmission performance of the material are influenced. The preparation of the coating on the surface of the radar antenna housing/antenna window is a common means for improving the moisture resistance of the radar antenna housing/antenna window. Coatings can generally be divided into organic coatings and inorganic coatings. The organic coating has the characteristics of simple process and excellent waterproof performance, but is slow in curing, easy to thermally decompose at high temperature, high in carbon residue rate and capable of influencing wave-transmitting performance; the inorganic coating has good high temperature resistance, does not contain impurity carbon, but is complex in process and difficult to form.
Wherein the influence of the additive on the sintering and crystallization of the quartz ceramic [ J]Refractory material, 1994(4) 201-.。。。Chao C H,Lu H Y.Crystallization of Na2O-doped colloidal gel-derived silica[J].Materials Science&The paper of Engineering A (Structural Materials, Properties, MicroStructure and Processing),2000,282(1-2): 123-. The organic-inorganic hybrid coating can exert the mechanical property and the heat resistance of the inorganic material, can exert the forming property and the waterproof property of the organic material, and can further improve the mechanical property of the material on the premise of reducing the moisture absorption rate of the material through special process treatment.
Disclosure of Invention
In order to obtain a coating structure with good mechanical properties for the field of radar radomes or antenna windows, SiCl is utilized in the invention4Hydrolyzing under the catalytic action of a surfactant to generate SiO with uniform fineness2Powder, adding proper auxiliary agent, mixing with organic silicon resin as coating material to coat on SiO2/SiO2A layer of compressive stress coating is formed on the surface of the radome/antenna window, and the radome/antenna window has good mechanical property and moisture-proof effect. The method comprises the following specific steps: the method comprises the following specific steps:
(one) preparation of Mixed solution 1
Adding (2-5) wt.% polyvinyl alcohol PVA and (1-10) wt.% boron carbide B into deionized water4C, heating the powder C and (1-2) wt.% of surfactant to 92-96 ℃, and stirring until the PVA is completely dissolved to obtain a mixed solution 1;
(II) preparation of Mixed solution 2
Taking a proper amount of the mixed solution 1, and dropwise adding tetrachlorosilane SiCl into the mixed solution4Keeping the temperature of 45-50 ℃ in a water bath and stirring for 1-2 hours to obtain a mixed solution 2;
(III) preparation of Mixed solution 3
Adding (10-50) wt.% of organic solvent and (0.5-2) wt.% of antioxidant into the silicone resin, and stirring until the silicone resin is completely dissolved in the organic solvent to obtain a mixed solution 3;
(IV) preparation of mixture 4
Mixing the solutionDropwise adding the solution 3 into the mixed solution 2, keeping the temperature of 45-50 ℃ in a water bath, stirring until most of the water and the organic solvent are volatilized, and then drying the mixture in a muffle furnace at 45-50 ℃ for 24-48 hours to obtain a mixture 4; wherein, the organic silicon resin and SiCl4The mass ratio is (1-2): 1;
(V) obtaining a coating
Taking out the mixture 4 and uniformly coating the mixture on SiO2/SiO2Controlling the thickness (400-: heating to 400-460 ℃ for 1-2 hours and preserving the heat for 1-2 hours; cooling to room temperature for 1-2 hours to obtain a coating; wherein the flow rate of nitrogen or argon is 50-100 ml/min.
As a modification, the surfactant in the step (one) includes, but is not limited to, Tween 80, sodium dodecylbenzene sulfonate, and sodium dodecyl sulfate.
As an improvement, SiCl is adopted in the step (two)4And B4The mass ratio of C is 100: (3-10).
As a modification, the organic silicon resin in the step (III) comprises but is not limited to monosilane, disilane and tetraethoxysilane, and the organic solvent comprises but is not limited to acetone and xylene.
As an improvement, the organic silicon resin and SiCl are adopted in the step (IV)4The mass ratio is (1-2): 1.
meanwhile, the radar antenna housing/antenna window prepared by the method is also provided.
Has the advantages that: the compressive stress coating provided by the invention can greatly reduce the moisture absorption performance of the radome/antenna window, improve the mechanical property and the heat resistance of the radome/antenna window and has good dielectric property. Meanwhile, the strength of the coating prepared by the method is improved by 20% or more when the coating is coated on the surface of a radome/antenna window; standing at 60 deg.C under 95% high temperature and high humidity for 28 days with weight increasing rate of less than or equal to 1%; the strength retention rate of the alloy reaches 80 percent or more after working for 8-10 hours at the temperature of 400-; the dielectric constant and the variation of dielectric loss are less than or equal to 8 percent, and the use requirement of the radome/antenna window under the harsh environment is met.
Drawings
FIG. 1 shows the strength of the radome of the invention as B4Schematic diagram of change rule of C content increase.
FIG. 2 shows the retention rate of the high-temperature strength of the radome according to the invention along with B4Schematic diagram of change rule of C content increase.
Detailed Description
The preparation of the compressive stress coating specifically comprises the following steps: using PVA water solution as adhesive material, heating and physically stirring to obtain B4The C particles and the surfactant are uniformly dispersed, so that SiCl is ensured4The hydrolysis is more sufficient and uniform; by using SiCl4The hydrolysis and the high-temperature sintering of the organic silicon resin form a pressure stress layer on the surface of the antenna housing/antenna window on the premise of not influencing the base material, so that the local tensile stress on the surface of the antenna housing/antenna window material in the stress process is relieved.
During the preparation, a small amount of B is added into the system4And C, an antioxidant, wherein on one hand, the antioxidant can slow down the high-temperature oxidation of the organic silicon resin in the air service environment. On the other hand, B4C is oxidized at high temperature to form B2O3The volume expansion is about 250 percent, and the shrinkage thermal stress of the organic silicon resin can be relieved; at the same time, B2O3The melting point is low, the fluidity is high, microcracks on the surface of the material can be healed, and the quartz devitrification can be inhibited.
The invention provides a change rule about strength and high temperature resistance of a radome, which is shown in figures 1-2, wherein the change rule of figures 1 and 2 is obtained based on B4C variable, obtained with other parameters unchanged: with B4The increase of C content, the strength of the radome and the change rule of high temperature resistance.
As can be seen from FIG. 1, with B4The increase of the content of C increases the strength of the radome first and then keeps unchanged basically. Overall modification effect and cost reasons, B4C and SiCl4The preferable range of the mass ratio is 0.03 to 0.15. As can be seen from FIG. 2, the retention of high temperature strength with B4The increase in C content is such that it increases, then remains substantially constant, and then decreasesTrend. B is4C and SiCl4The preferable range of the mass ratio is 0.03 to 0.10. In summary, SiCl is used in the present invention4And B4The mass ratio of C is 100: (3-10).
The present invention is further illustrated below with reference to examples.
Wherein, the surfactant includes, but is not limited to, tween 80, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate. The organic silicon resin includes but is not limited to monosilane, disilane and tetraethoxysilane, and the organic solvent includes but is not limited to acetone and xylene.
The first embodiment is as follows:
1. adding 2 wt.% polyvinyl alcohol (PVA), 2 wt.% boron carbide (B) to deionized water4C) Powder and 1 wt.% sodium dodecylbenzene sulfonate, heated to 96 ℃ and stirred until PVA is completely dissolved, which is designated as mixed solution 1.
2. Taking a proper amount of the mixed solution 1, and dropwise adding tetrachlorosilane (SiCl) into the mixed solution4) And the temperature was kept at 50 ℃ in a water bath and stirred for 1 hour to obtain a mixed solution 2. Wherein, SiCl4And B4The mass ratio of C is 20: 1.
3. 20 wt.% of xylene and 2 wt.% of antioxidant are added to the monosilane, and the mixture is stirred until the silicone resin is completely dissolved in the organic solvent, so that a mixed solution 3 is obtained.
4. And dropwise adding the mixed solution 3 into the mixed solution 2, keeping the temperature of the water bath at 50 ℃, stirring until most of the water and the organic solvent are volatilized, and drying the mixture in a muffle furnace at 50 ℃ for 48 hours to obtain a mixture 4. Wherein, the organic silicon resin and SiCl4The mass ratio is 1: 1.
5. taking out the mixture 4 and uniformly coating the mixture on SiO2/SiO2The thickness of the surface of the radome is controlled to be 400 μm. Then, the mixture was placed in a high temperature furnace, and nitrogen gas was introduced at a flow rate of 50 ml/min. The temperature-raising program is controlled as follows: heating to 460 ℃ for 2 hours and preserving the temperature for 2 hours; the temperature is reduced to room temperature for 2 hours.
The coating prepared by the embodiment is coated on the surface of the radome, so that the strength is improved by 30%; standing at 60 deg.C under 95% high temperature and high humidity for 28d with weight increasing rate of 0.93%; the strength retention rate of the high-temperature-resistant high-strength steel reaches 87 percent after working for 10 hours at the high temperature of 400 ℃; the dielectric constant is improved by 5.4 percent and is 3.64; the dielectric loss is improved by 2.3 percent and is 0.014, and the use requirement of the radar antenna housing under the harsh environment is met.
The second embodiment is as follows:
1. to deionized water was added 5 wt.% polyvinyl alcohol (PVA), 5 wt.% boron carbide (B)4C) Powder and 1 wt.% tween 80, heated to 92 ℃ and stirred until PVA was completely dissolved, denoted as mixed solution 1.
2. Taking a proper amount of the mixed solution 1, and dropwise adding tetrachlorosilane (SiCl) into the mixed solution4) And the temperature was kept at 50 ℃ in a water bath and stirred for 2 hours to obtain a mixed solution 2. Wherein, SiCl4And B4The mass ratio of C is 10: 1.
3. adding 50 wt.% of acetone and 1 wt.% of antioxidant into the tetraethoxysilane organic silicon resin, and stirring until the organic silicon resin is completely dissolved in the organic solvent to obtain a mixed solution 3.
4. And dropwise adding the mixed solution 3 into the mixed solution 2, keeping the temperature of the water bath at 50 ℃, stirring until most of the water and the organic solvent are volatilized, and drying the mixture in a muffle furnace at 50 ℃ for 24 hours to obtain a mixture 4. Wherein, the organic silicon resin and SiCl4The mass ratio is 2: 1.
5. taking out the mixture 4 and uniformly coating the mixture on SiO2/SiO2The thickness of the surface of the radar antenna window is controlled to be 800 mu m. Then the mixture is put into a high temperature furnace, argon is introduced, and the flow rate is 100 ml/min. The temperature-raising program is controlled as follows: heating to 400 ℃ for 2 hours and preserving the temperature for 2 hours; the temperature is reduced to room temperature for 1 hour.
When the coating prepared by the embodiment is coated on the surface of the radar antenna window, the strength is improved by 27%; standing at 60 deg.C under 95% high temperature and high humidity for 28d with weight increasing rate of 0.65%; the strength retention rate of the high-temperature-resistant high-strength steel reaches 82 percent after working for 10 hours at the high temperature of 600 ℃; the dielectric constant is improved by 8.7 percent and is 3.75; the dielectric loss is improved by 7.1 percent and is 0.015 percent, and the use requirement of the radar antenna window under the harsh environment is met.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A preparation method of a radar antenna housing/antenna window compressive stress coating is characterized by comprising the following steps: the method comprises the following specific steps:
(one) preparation of Mixed solution 1
Adding 2-5 wt% of PVA and 1-10 wt% of B into deionized water4C, heating the powder C and 1-2 wt% of surfactant to 92-96 ℃, and stirring until the PVA is completely dissolved to obtain a mixed solution 1;
(II) preparation of Mixed solution 2
Taking the mixed solution 1, and dropwise adding SiCl into the mixed solution4Keeping the temperature of 45-50 ℃ in a water bath and stirring for 1-2 hours to obtain a mixed solution 2; wherein SiCl4And B4The mass ratio of C is 100: 3-10;
(III) preparation of Mixed solution 3
Adding 10-50 wt% of organic solvent and 0.5-2 wt% of antioxidant into the organic silicon resin, and stirring until the organic silicon resin is completely dissolved in the organic solvent to obtain a mixed solution 3;
(IV) preparation of mixture 4
Dropwise adding the mixed solution 3 into the mixed solution 2, keeping the temperature of 45-50 ℃ in a water bath, stirring until most of water and the organic solvent are volatilized, and then placing the mixture in a muffle furnace to dry for 24-48 hours at 45-50 ℃ to obtain a mixture 4;
(V) obtaining a coating
Taking out the mixture 4, uniformly coating the mixture on the surface of a radome or an antenna window prepared from the quartz fiber reinforced quartz-based composite material, controlling the thickness to be 400-: heating to 400-460 ℃ for 1-2 hours and preserving the heat for 1-2 hours; cooling to room temperature for 1-2 hours to obtain a coating; wherein the flow of nitrogen or argon is 50-100 ml/min.
2. The method for preparing the radome/antenna window compressive stress coating of claim 1, wherein the method comprises the following steps: the surfactant in step (one) includes, but is not limited to, tween 80, sodium dodecylbenzene sulfonate, and sodium dodecyl sulfate.
3. The method for preparing the radome/antenna window compressive stress coating of claim 1, wherein the method comprises the following steps: the organic silicon resin in the step (III) comprises but is not limited to monosilane, disilane and tetraethoxysilane, and the organic solvent comprises but is not limited to acetone and xylene.
4. The method for preparing the radome/antenna window compressive stress coating of claim 1, wherein the method comprises the following steps: in the step (IV), organic silicon resin and SiCl are adopted4The mass ratio is 1-2: 1.
5. a radome/antenna window obtained by the method for preparing a radome/antenna window compressive stress coating according to any one of claims 1-4.
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