CN102501492A - Preparation technology of centimetre wave-millimeter wave compatible absorbing material - Google Patents
Preparation technology of centimetre wave-millimeter wave compatible absorbing material Download PDFInfo
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Abstract
The invention relates to a preparation technology of a centimetre wave-millimeter wave compatible absorbing material. The material is of five-layer structure, and a substrate is an irregular surface made of any material; the topmost layer is a first layer, and mainly consists of a W-shaped hexagonal ferrite absorbing agent and an acrylic resin adhesive; a second layer is composed of a carbonyl iron powder absorbing agent and an epoxy resin adhesive, and a third layer is composed of a Fe85Si1Al6Cr8 nanometer crystal thin absorbing agent and an epoxy resin adhesive; a fourth layer is composed of a polycrystal iron fibre absorbing agent and an epoxy resin adhesive; and a fifth layer is composed of a chopped carbon fiber, a sooty mixed absorbing agent and a polyurethane adhesive. A preparation process comprises the following steps: firstly, covering and preparing a bottom fifth-layer medium coating on the substrate; and then successively covering and preparing a fourth-layer medium coating, a third-layer medium coating, a second-layer medium coating and a first-layer medium coating, wherein the coating preparation of each medium coating is as follows: uniformly stirring a coupling agent, a diluting agent and the absorbing agent of each layer, standing, then adding the adhesive of each layer, uniformly stirring to obtain a paint, coating the paint, and curing, thus obtaining the centimetre wave-millimeter wave compatible absorbing material.
Description
Technical field
The present invention relates to a kind of preparation technology who centimeter wave-millimeter wave is had the composite of compatible suction ripple effect.
Background technology
Absorbing material can convert electromagnetic wave energy the energy of other form to and be depleted and attenuate.Because the fast development of electronics telecom technology; Make electromagnetic wave frequency range forward more high band expand; Electromagnetic interference that the electromagenetic wave radiation of ultratvide frequency band causes and electromagnetic pollution problem cause day by day to be paid close attention to and attention, urgently seeks the compatible civilian absorbing material of a kind of multiband.
At present; (2～18GHz) absorbing materials have good absorbing property in superhigh frequency band to existing centimeter wave; But its millimeter wave absorbing property is very low, and millimeter wave (26.6～40GHz) absorbing materials have good absorbing property in millimere-wave band, but very low again at its centimeter wave absorbing property; Exist the superhigh frequency band and the millimeter wave of absorbing material to inhale the problem that the wave band performance is difficult to compatibility.The task of top priority is to develop centimeter wave and the compatible absorbing material of millimeter wave, is used to satisfy the active demand of people to absorbing material.
Summary of the invention
In order to solve the performance issue of the compatibility suction ripple that centimeter wave-millimeter wave can not be good in the current existing field, the object of the present invention is to provide a kind of preparation technology of the composite wave-suction material that compatible loss absorbs to centimeter wave-millimeter wave band electromagnetic wave.
The technical scheme that the present invention adopted is, described material is composited by five layers of dielectric coated, and the top layer is a ground floor, next be followed successively by second and third, four layers, bottom is a layer 5; The raw material of said ground floor dielectric coated comprises: BaCo
0.9Zn
1.1Fe
16O
2750～60 parts of W type hexgonal screws, 40～50 parts of acrylic resin adhesives; The raw material of said second layer dielectric coated comprises 60～70 parts of spherical carbonyl iron dusts, 30～40 parts of epoxyns; The raw material of said the 3rd layer of dielectric coated comprises: Fe
85Si
1Al
6Cr
865～75 parts in nanocrystalline sheet absorbent, 25～35 parts of epoxyns; The raw material of said the 4th layer of dielectric coated comprises 10～20 parts in polycrystalline iron fiber absorbent, 80～90 parts of epoxyns; The raw material of said layer 5 dielectric coated comprises that chopped carbon fiber and carbon black are that 1: 8～1: 5 mixed becomes composite absorber by mass ratio, 45～55 parts of composite absorbers, 45～55 parts of polyurethane adhesives, umber all by weight, down with; The preparation process is that coating preparation bottom layer 5 dielectric coated on matrix applies the 4th layer, the 3rd layer of preparation, the second layer, ground floor dielectric coated more successively earlier; The coating preparation of each dielectric coated is: the absorbent through coupling agent, diluent and each layer stirs, and after leaving standstill, the adhesive that adds each layer is stirred into to solidify after coating applies and forms.
The preferred spherical carbonyl iron particle degree of the present invention is 3～5 microns.
3～6 microns of the diameters of the preferred polycrystalline iron fiber absorbent of the present invention, draw ratio are 15: 1～20: 1.
2～5 microns of the preferred chopped carbon fiber diameters of the present invention, draw ratio is 6: 1～10: 1; 1～3 micron of the granularity of carbon black.
The special preferred silane coupling agent of coupling agent of the present invention KH550.
The present invention is through the thickness of the number of times control coating of every layer of coating of control.Ground floor exists respectively to the thickness of layer 5 among the present invention: 0.1～0.15mm, and 0.2～0.25mm, 0.3～0.35mm, 0.3～0.35mm, 0.5～0.6mm is advisable.
Described diluent preferably adopts by diformazan is stupid and mixes with n-butanol.
Described curing is after being incubated 0.8-1.2 hour down through 25-35 ℃, again temperature being risen to 55-65 ℃ and solidified 0.8-1.2 hour, or directly at room temperature place spontaneous curing without heating.
The coated substrates of composite of the present invention can be the irregular surfaces of any material.Bottom is that layer 5 is connected with the matrix coating.
The composite that makes through method of the present invention is compared with existing absorbing material has following outstanding advantage:
Composite multi-layer absorbing material of the present invention has good impedance matching effect, and can reduce electromagnetic reflection to greatest extent.The composite wave-suction material that makes is superior at 8～12GHz superhigh frequency band reflectivity-8dB (detect performance and see Fig. 2); Be superior to-10dB (detect performance and see Fig. 3) at 26.5～40GHz millimere-wave band reflectivity, reached the compatible purpose that absorbs of centimeter wave-millimeter wave band electromagnetic wave.
The present invention's advantage further is embodied in, and the thickness of composite wave-suction material of the present invention from ground floor to layer 5 stratiform absorbing material is respectively: 0.1～0.15mm, 0.2～0.25mm, 0.3～0.35mm, 0.3～0.35mm, 0.5～0.6mm.The absorbing material integral thickness is less than 2mm, and low, the light weight of surface density can be widely used in electromagnetic compatibility and anti-electromagnetic interference field.
Composite Preparation of the present invention may further comprise the steps:
1. with coupling agent; The diluent that mixes with xylenes and n-butanol; Add 2～5 microns of diameters; Draw ratio is that the carbon black of 6: 1～10: 1 chopped carbon fiber and 1～3 micron of granularity is that 1: 8～1: 5 mixed becomes composite absorber 45～55g to wherein by mass ratio, with electric blender mixture is stirred half an hour; After leaving standstill half an hour, in mixture, add polyurethane adhesive 45～55g again, stir into uniform coating; Adopt aerial spraying or brushing mode that this coating is coated on the matrix; THICKNESS CONTROL is at 0.5～0.6mm; Put into 25-35 ℃ of constant temperature drying room then after 0.8-1.2 hour; Again the drying room temperature is risen to 55-65 ℃ and solidified 0.8-1.2 hour, perhaps at room temperature place spontaneous curing, thereby make the layer 5 dielectric coated.
2. with coupling agent, the diluent with xylenes and n-butanol mix adds 3～6 microns of diameters, draw ratio be polycrystalline iron fiber absorbent 10～20g of 15: 1～20: 1 to wherein, with electric blender mixture is stirred half an hour; After leaving standstill half an hour, in mixture, add epoxyn 80～90g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the layer 5 dielectric coated material; THICKNESS CONTROL is at 0.3～0.35mm; Put into 25-35 ℃ of constant temperature drying room then after 0.8-1.2 hour; Again the drying room temperature is risen to 55-65 ℃ and solidified 0.8-1.2 hour, perhaps at room temperature place spontaneous curing, thereby make the 4th layer of dielectric coated.
3. with coupling agent, the diluent with xylenes and n-butanol mix adds Fe
85Si
1Al
6Cr
8Nanocrystalline sheet absorbent 65～75g stirs half an hour with electric blender with mixture to wherein; After leaving standstill half an hour, in mixture, add epoxyn 25～35g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the 4th layer of dielectric coated material; THICKNESS CONTROL is at 0.3～0.35mm; Put into 25-35 ℃ of constant temperature drying room then after 0.8-1.2 hour; Again the drying room temperature is risen to 55-65 ℃ and solidified 0.8-1.2 hour, perhaps at room temperature place spontaneous curing, thereby make the 3rd layer of dielectric coated.
4. with coupling agent, with the diluent that xylenes and n-butanol mix, the spherical carbonyl iron dust 60～70g that adds granularity and be 3～5 microns stirs half an hour with electric blender with mixture to wherein; After leaving standstill half an hour, in mixture, add epoxyn 30～40g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the 3rd layer of wave-absorbing coating material; THICKNESS CONTROL is at 0.2～0.25mm; Put into 25-35 ℃ of constant temperature drying room then after 0.8-1.2 hour; Again the drying room temperature is risen to 55-65 ℃ and solidified 0.8-1.2 hour, perhaps at room temperature place spontaneous curing, thereby make second layer dielectric coated.
5. with coupling agent, the diluent with xylenes and n-butanol mix adds BaCo
0.9Zn
1.1Fe
16O
27W type hexgonal screw 50～60g stirs half an hour with electric blender with mixture to wherein; After leaving standstill half an hour, in mixture, add acrylic resin adhesive 40～50g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the second layer wave-absorbing coating material; THICKNESS CONTROL is at 0.1～0.15mm; Put into 25-35 ℃ of constant temperature drying room then after 0.8-1.2 hour; Again the drying room temperature is risen to 55-65 ℃ and solidified 0.8-1.2 hour, perhaps at room temperature place spontaneous curing, thereby make the ground floor dielectric coated.
Stable preparation process of the present invention, easy and simple to handle, with short production cycle and energy savings, and the coating absorption affinity by force and do not peel off can realize that heavy industrialization produces continuously.
Description of drawings
Fig. 1 is the compatible composite structure sketch map of inhaling ripple of centimeter wave of the present invention-millimeter wave.
Fig. 2 is composite 8～12GHz superhigh frequency band absorbing property of the present invention.
Fig. 3 is composite 26.5～40GHz millimere-wave band absorbing property of the present invention.
Fig. 4 is a composite material preparation process flow chart of the present invention.
The specific embodiment
Following examples are intended to explain the present invention rather than to further qualification of the present invention.
1, gets the 1g coupling agent; Using 50g is the diluent that 7: 3 xylenes and n-butanol mixes by volume; Add 2～5 microns of diameters; Draw ratio is that the carbon black of 6: 1～10: 1 chopped carbon fiber and 1～3 micron of granularity is that 1: 8～1: 5 mixed becomes composite absorber 45g to wherein by mass ratio, with electric blender mixture is stirred half an hour; After leaving standstill half an hour, in mixture, add polyurethane adhesive 55g again, stir into uniform coating; Adopt aerial spraying or brushing mode that this coating is coated on the matrix; THICKNESS CONTROL is put into 30 ℃ of constant temperature drying rooms after 1 hour then at 0.5～0.6mm, again the drying room temperature is risen to 60 ℃ and solidifies 1 hour; Perhaps at room temperature place spontaneous curing in 12 hours, thereby make the layer 5 dielectric coated.
2, get the 1g coupling agent; Using 50g is the diluent that 7: 3 xylenes and n-butanol mixes by volume; Add 3～6 microns of diameters, draw ratio be 15: 1～20: 1 polycrystalline iron fiber absorbent 10g to wherein, with electric blender mixture is stirred half an hour; After leaving standstill half an hour, in mixture, add epoxyn 90g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the layer 5 dielectric coated material; THICKNESS CONTROL is at 0.3～0.35mm; Put into 30 ℃ of constant temperature drying rooms then after 1 hour; Again the drying room temperature is risen to 60 ℃ and solidified 1 hour, perhaps at room temperature place spontaneous curing in 12 hours, thereby make the 4th layer of dielectric coated.
3, get the 1g coupling agent, the diluent with xylenes and n-butanol mix adds Fe
85Si
1Al
6Cr
8Nanocrystalline sheet absorbent 65g stirs half an hour with electric blender with mixture to wherein; After leaving standstill half an hour, in mixture, add epoxyn 35g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the 4th layer of dielectric coated material; THICKNESS CONTROL is at 0.3～0.35mm; Put into 25-35 ℃ of constant temperature drying room then after 0.8-1.2 hour; Again the drying room temperature is risen to 60 ℃ and solidified 1 hour, perhaps at room temperature place spontaneous curing in 12 hours, thereby make the 3rd layer of dielectric coated.
4, get the 1g coupling agent, using 50g is 7: 3 xylenes and the diluent that n-butanol mixes by volume, add granularity and be 3～5 microns spherical carbonyl iron dust 60g extremely wherein, with electric blender mixture is stirred half an hour; After leaving standstill half an hour, in mixture, add epoxyn 40g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the 3rd layer of wave-absorbing coating material; THICKNESS CONTROL is at 0.2～0.25mm; Put into 30 ℃ of constant temperature drying rooms then after 1 hour; Again the drying room temperature is risen to 60 ℃ and solidified 1 hour, perhaps at room temperature place spontaneous curing in 12 hours, thereby make second layer dielectric coated.
5, get the 1g coupling agent, using 50g is the diluent that 7: 3 xylenes and n-butanol mixes by volume, adding BaCo
0.9Zn
1.1Fe
16O
27W type hexgonal screw 50g stirs half an hour with electric blender with mixture to wherein; After leaving standstill half an hour, in mixture, add acrylic resin adhesive 50g again, stir into uniform coating; Adopt aerial spraying or brush technology this coating is coated on the second layer wave-absorbing coating material; THICKNESS CONTROL is at 0.1～0.15mm; Put into 30 ℃ of constant temperature drying rooms then after 1 hour; Again the drying room temperature is risen to 60 ℃ and solidified 1 hour, perhaps at room temperature place spontaneous curing in 12 hours, thereby make the ground floor dielectric coated.
Embodiment 2
Step is with embodiment 1, wherein BaCo in the ground floor
0.9Zn
1.1Fe
16O
27W type hexgonal screw 60g, acrylic resin adhesive 40g; The raw material of second layer dielectric coated comprises: the adding granularity is 3～5 microns spherical carbonyl iron dust 70g, epoxyn 30g; The raw material of said the 3rd layer of dielectric coated comprises: Fe
85Si
1Al
6Cr
8Nanocrystalline sheet absorbent 75g, epoxyn 25g; The raw material of said the 4th layer of dielectric coated comprises 3～6 microns of adding diameters, and draw ratio is 15: 1～20: 1 polycrystalline iron fiber absorbent 20g, epoxyn 80g; The raw material of said layer 5 dielectric coated comprises 2～5 microns of adding diameters; Draw ratio is that the carbon black of 6: 1～10: 1 chopped carbon fiber and 1～3 micron of granularity is that 1: 8～1: 5 mixed becomes composite absorber by mass ratio; Composite absorber 55g, polyurethane adhesive 45g.
Claims (8)
1. the preparation technology to the compatible absorbing material of centimeter wave and millimeter wave is characterized in that described material is composited by five layers of dielectric coated, and the top layer is a ground floor, next be followed successively by second and third, four layers, bottom is a layer 5; The raw material of said ground floor dielectric coated comprises: BaCo
0.9Zn
1.1Fe
16O
2750～60 parts in W type hexgonal screw absorbent, 40～50 parts of acrylic resin adhesives; The raw material of said second layer dielectric coated comprises: 60～70 parts in spherical carbonyl iron dust absorbent, 30～40 parts of epoxyns; The raw material of said the 3rd layer of dielectric coated comprises: Fe
85Si
1Al
6Cr
865～75 parts in nanocrystalline sheet absorbent, 25～35 parts of epoxyns; The raw material of said the 4th layer of dielectric coated comprises 10～20 parts in polycrystalline iron fiber absorbent, 80～90 parts of epoxyns; The raw material of said layer 5 dielectric coated comprises that chopped carbon fiber and carbon black are that 1: 8～1: 5 mixed becomes composite absorber by mass ratio, 45～55 parts of composite absorbers, and 45～55 parts of polyurethane adhesives, above umber are all by weight; The preparation process is that coating preparation bottom layer 5 dielectric coated on matrix applies the 4th layer, the 3rd layer of preparation, the second layer, ground floor dielectric coated more successively earlier; The coating preparation of each dielectric coated is: the absorbent through coupling agent, diluent and each layer stirs, and after leaving standstill, the adhesive that adds each layer is stirred into to solidify after coating applies and forms.
2. technology according to claim 1 is characterized in that, described spherical carbonyl iron dust granularity is 3～5 microns.
3. technology according to claim 1 is characterized in that, 3～6 microns of the diameters of described polycrystalline iron fiber absorbent, and draw ratio is 15: 1～20: 1.
4. technology according to claim 1 is characterized in that, 2～5 microns of described chopped carbon fiber diameters, and draw ratio is 6: 1～10: 1; 1～3 micron of the granularity of carbon black.
5. according to each described technology of claim 1-4, it is characterized in that said coupling agent comprises silane coupler KH550.
6. according to each described technology of claim 1-4, it is characterized in that described diluent is to mix with n-butanol by diformazan is stupid.
7. according to each described technology of claim 1-4; It is characterized in that; Described curing is after being incubated 0.8-1.2 hour down through 25-35 ℃, again temperature being risen to 55-65 ℃ and solidified 0.8-1.2 hour, or directly at room temperature place spontaneous curing without heating.
8. according to each described composite of claim 1-4, it is characterized in that said ground floor dielectric coated exists respectively to the coating thickness of layer 5 dielectric coated: 0.1～0.15mm; 0.2～0.25mm; 0.3～0.35mm, 0.3～0.35mm, 0.5～0.6mm.
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| CN103073981A (en) * | 2012-09-13 | 2013-05-01 | 电子科技大学 | High-temperature-resistant radar wave absorption coating and preparation method thereof |
| CN109765633A (en) * | 2018-12-19 | 2019-05-17 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Security check passage based on Terahertz safety check instrument |
| CN114531837A (en) * | 2022-02-16 | 2022-05-24 | 宁波招宝磁业有限公司 | Wave-absorbing material with composite structure and preparation method thereof |
| CN117430919A (en) * | 2023-11-28 | 2024-01-23 | 珠海鲁班智造科技有限公司 | High-power wedge wave-absorbing material and preparation method thereof |
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| JP2010245112A (en) * | 2009-04-01 | 2010-10-28 | Nitto Denko Corp | Electromagnetic wave absorbing body |
| CN101699564A (en) * | 2009-10-27 | 2010-04-28 | 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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103073981A (en) * | 2012-09-13 | 2013-05-01 | 电子科技大学 | High-temperature-resistant radar wave absorption coating and preparation method thereof |
| CN103073981B (en) * | 2012-09-13 | 2016-01-27 | 电子科技大学 | High temperature resistant radar wave absorption absorbing coating and preparation method |
| CN109765633A (en) * | 2018-12-19 | 2019-05-17 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Security check passage based on Terahertz safety check instrument |
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| CN117430919A (en) * | 2023-11-28 | 2024-01-23 | 珠海鲁班智造科技有限公司 | High-power wedge wave-absorbing material and preparation method thereof |
| CN117430919B (en) * | 2023-11-28 | 2024-05-24 | 珠海鲁班智造科技有限公司 | High-power wedge wave-absorbing material and preparation method thereof |
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