CN103275529A - 0.6-18GHz-frequency-band wave-absorbing powder/inorganic silicate anti-electromagnetic interference coating material and preparation method thereof - Google Patents
0.6-18GHz-frequency-band wave-absorbing powder/inorganic silicate anti-electromagnetic interference coating material and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of chemical industry and materials, and relates to a 0.6-18GHz-frequency-band wave-absorbing powder/inorganic silicate anti-electromagnetic interference coating material and a preparation method thereof. The preparation method comprises the steps of: mixing and stirring specific frequency band of wave-absorbing powder and inorganic silicate solution to obtain wave-absorbing powder/inorganic silicate solution slurry, stirring and blending non-essential curing agent auxiliaries, non-essential reactive metal and non-essential filler, curing into membranes at room temperature, to obtain the 0.6-18GHz-frequency-band wave-absorbing/inorganic silicate anti-electromagnetic interference coating material. The 0.6-18GHz-frequency-band wave-absorbing/inorganic silicate anti-electromagnetic interference coating material with the thickness of 80-200mum can absorb more than 85% of 0.6-18GHz frequency band of electromagnetic wave, is good in corrosion resistance property and mechanical property, has good workability and long-acting anti-electromagnetic interference effect, and can be used in the fields of a mobile communication substation, a power locomotive, a high-voltage substation and other places easily generating high-frequency electromagnetic wave interference.
Description
Technical field
The invention belongs to chemical industry, material technology field, specifically is anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of a kind of 0.6-18GHz frequency range and preparation method thereof.
Background technology
Aspect hertzian wave pollution protection, what adopt mostly is the reflection of electromagnetic wave material, though this method has solved the protective effect to certain object, certainly will cause electromagnetic secondary pollution again at present.
Continuous progress along with development of modern science and technology and industrial civilization, electronic apparatus and communication system are penetrated into to be produced and various fields in life, electromagnetic radiation becomes continuous enhanced physical factor, change the physical properties of environment for human survival, intensity, time and complicacy that the mankind are exposed to electromagnetic radiation grow with each passing day, along with electromagnetic pollution is more and more many, more and more strong, become the fourth-largest public hazards in the global range gradually.The environmental pollution meeting that electromagnetic radiation produces brings many harm for the people's life, and it may have influence on the normal operation of precision instrument and electronics on the one hand; Long-term on the other hand electromagnetic radiation meeting causes that pathology appears in human body, is unfavorable for health, studies have shown that the microblogging electromagnetic radiation can cause the illness of biological substrate, nervus centralis, cardiovascular systems, crystalline lens, blood system.
Therefore, how to protect the problem of electromagnetic radiation and interference (EMI) effectively, the harm that reduces electromagnetic radiation has become and has become more and more important, and has become the important topic of global scientific and technological circle.
Studies show that previously utilizes some material or structure can effectively protect electromagnetic radiation electromagnetic reflection and sorption.Relatively Chang Yong screening material against electromagnetic radiation normally has the material such as metal, alloy and carbon, graphite of high conductivity, realizes shielding protection to buildings, various plant and instrument by these materials being made forms such as plate, net, fabric and coating.The problem that can not be ignored is, the simple high-conductivity metal that adopts is as shielding material, its shielding effect does not mainly match according to incident electromagnetic wave and dielectric material impedance and produces reflection and realize, but the hertzian wave of its reflection does not disappear or produces strong decay, therefore tend to other outer zones of shielding area are produced new radiation hazradial bundle, thereby form the secondary electromagnetic pollution.
Absorbing material mainly is because some material has higher magnetic loss tangent value, relies on magnetic polarization mechanism decay such as magnetic hysteresis loss, domain wall resonance, aftereffect loss, absorbs hertzian wave, as ferrite, carbonyl iron dust etc.; Perhaps utilize some materials to have higher electrical loss tangent value, rely on the electronic polarization of medium or interfacial polarization to decay, absorb hertzian wave, as graphitized carbon black, graphite etc.But because the characteristic of absorbing material itself makes its influence that is subject to frequency, can only have shielding effect preferably to a certain narrower frequency range.
Usually absorbing material can be divided into structure-type and coating type by moulding technology and supporting capacity.The structure-type wave-absorption material has carrying and reduces the reflection of electromagnetic wave dual-use function, normally absorption agent is dispersed in the structured material; The coating type absorbing material normally is dispersed in absorption agent in the matrix of superpolymer and makes microwave absorbing coating, and its technology is simple, and is easy to use, regulates easily and comes into one's own.Absorbing material mainly contains dielectric loss type and magnetic loss type.Dielectric loss type absorption agent such as expanded graphite, silicon carbide, barium titanate, conductive polymers etc. have higher dielectric loss tangent value, and its loss mechanism is to rely on electronic polarization or the interfacial polarization decay of medium and absorb hertzian wave; Magnetic loss type absorption agent such as ferrite, carbonyl iron dust etc. have higher magnetic loss tangent value, and loss mechanism is to rely on magnetic polarization mechanism decay and absorption hertzian wave such as magnetic hysteresis loss, domain wall resonance and aftereffect loss altogether.
China Patent No.: ZL200810011234, patent name: the preparation method who discloses foam aluminum alloy base wave-absorbing material in a kind of preparation method's of foam aluminum alloy base wave-absorbing material the patent of invention, it comprises the surface preparation of foam aluminium alloy material, the spraying step of the preparation of wave absorbing agent coating and foam aluminium alloy material, foam aluminium alloy material with process skimming treatment and sandblasting is matrix, at the single antiradar coatings of its surperficial butcher or meet antiradar coatings, be prepared into single wave absorbing agent foam aluminum alloy base wave-absorbing material or meet the wave absorbing agent foam aluminum alloy base wave-absorbing material.The absorbing material that this method obtains is in 26.5 ~ 40.0GHz frequency range build-in test reflection of electromagnetic wave rate, is lower than-the broadband most significant digit 3.18GHz of 10dB, and absorbing property still is on the low side.
China application number: CN201010561198.2, patent name: meet to disclose in the patent application that meets the coating electromagnetic shielding material of coating electromagnetic screen coating and preparation thereof and meet the antiradar coatings that the coating electromagnetic screen coating comprises the conductive layer coating with reflection function and has absorptive function; The reflecting layer coating composition comprises: polymer emulsion, conductive filler material, coupling agent, defoamer, wetting agent, film coalescence aid, thickening material and water; Inhaling ripple coating component comprises: polymer emulsion, suction ripple filler, coupling agent, defoamer, wetting agent, film coalescence aid, thickening material and water; The compound mode in this invention employing suction ripple layer and reflecting layer is prepared screening material against electromagnetic radiation, effectively reduces the secondary pollution that electromagnetic radiation causes because of reflection, but this scheme discloses it whether frequency electromagnetic waves is not had good wave-absorbing effect.
Chinese patent application number: CN200910154722.1, patent name: disclose wave-absorbing coating material in the application for a patent for invention of high-efficiency broadband wave-absorbing coating material and using method by inhaling the wave base coating and inhaling the corrugated coating and form, the component of inhaling the wave base coating comprises BaFe12019, BaTi03, expanded graphite, polyacrylate dispersion, TEXANOL membrane-forming agent, 5027 powders, GPE defoamer and PU-220 flow agent.The using method of high-efficiency broadband wave-absorbing coating material of the present invention is: take by weighing each raw material by the mass ratio of inhaling wave base coating component, obtain inhaling the wave base coating after mixing; Take by weighing each raw material by the mass ratio of inhaling corrugated coating component, after mixing, obtain inhaling the corrugated coating; The body surface of high-efficiency broadband wave-absorbing coating material to be coated is carried out grinding process, apply at the body surface through grinding process and inhale the wave base coating, apply at the body surface with suction wave base coating and inhale the corrugated coating.This invention is when reaching certain reflection coefficient, and the coating that needs is thicker, as 2.4 ~ 5.5mm.
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Summary of the invention
In order to solve the problems of the technologies described above, the invention provides anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of a kind of 0.6-18GHz frequency range and preparation method thereof.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of a kind of 0.6-18GHz is characterized in that it is made by following raw material: inhale ripple powder, inorganic silicic acid salts solution, nonessential auxiliary curing agent, nonessential reactive metal powder, nonessential cenosphere.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that the weight percentage that described each raw material accounts for total raw material is respectively: inhale ripple powder 64%-68%; Inorganic silicic acid salts solution 18%-21%; Auxiliary curing agent 4%-5.7%; Reactive metal powder 4.8%-6%; Cenosphere 4%-5% is preferably and inhales ripple powder 68%; Inorganic silicic acid salts solution 18%; Auxiliary curing agent 4.6%; Reactive metal powder 5.4%; Cenosphere 4%.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that described suction ripple powder is is Fe by component
85Si
2Al
6Cr
7Magneticalloy powder and component be (Ba
0.7Sr
0.3)
3Ni
2Fe
24O
41Z type hexgonal screw material be composited by the mass ratio of 2:3.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that described inorganic silicic acid salts solution is selected from modulus at 2.4-8 lithium silicate solution, sodium silicate solution, the composition of one or more in the potassium silicate solution.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that described nonessential auxiliary curing agent is selected from a kind of in phosphoric acid solution or the magnesium chloride solution.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that described nonessential reactive metal powder is selected from active zinc powder, the one or more combination in the activated aluminum powder.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that described nonessential cenosphere is selected from one or more the composition in hollow glass bead, ceramic hollow microballon, the hollow grey microballon of fine coal.
The anti-electromagnetic interference coating preparation methods of suction ripple powder/inorganic silicate of described 0.6-18GHz is characterized in that comprising following steps:
1) under agitation condition, will inhale ripple powder, reactive metal powder, cenosphere and mix with the inorganic silicic acid salts solution, evenly disperse alr mode to prepare stealthy powder inorganic silicic acid salts solution slurry;
2) before the construction, under agitation condition, 1) in stealthy powder inorganic silicic acid salts solution slurry in add nonessential auxiliary curing agent and make the anti-electromagnetic interference coating of inorganic silicate;
3) normal temperature bottom roll or spraying application, i.e. film-forming.
In film process, anti-electromagnetic interference inorganic silicic acid salts solution slurry carries out chemical reaction with the agent of inorganic silicate auxiliary curing agent and reactive metal powder, can obtain the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz, wherein inhale the ripple powder and have certain oil absorbency, disperseing to stir under the effect of shearing force, coated by the inorganic silicic acid salts solution, obtaining particle diameter is 40 μ m and following grinding dispersion.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of described 0.6-18GHz is at the metal object surface of required shielding, as the application in fields such as electric locomotive chassis, electrical equipment, power transmission and transformation.
Suction ripple powder of the present invention is by the Fe with the atomization process preparation
85Si
2Al
6Cr
7Z type (the Ba of alloy powder and sol-gel technology preparation
0.7Sr
0.3)
3Ni
2Fe
24O
41Ferrite is raw material, adopts the matrix material that is made of this 2 class material of high-energy ball milling compounding technology preparation.
The composite powder of process high-energy ball milling gained as shown in Figure 1, the iron alloy particle adhesion is on ferrite crystal grains, composite material granular still keeps the grain morphology of Z-iron oxysome hexagonal plate, and alloy particle becomes irregular flakey because of ball-milling processing by original sphere.
This suction ripple powder has the electromagnetic performance of setting, hertzian wave to the 0.6-18GHz range of wavelength has good attenuation by absorption effect, in the forming process of filming, form the suction ripple powder coating of evenly gathering through the suction ripple powder particulate that is coated by silicate solutions that disperses to stir the back acquisition, can effectively absorb the hertzian wave of this wave band.
Anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of a kind of 0.6-18GHz frequency range of the present invention and preparation method thereof, in film process, anti-electromagnetic interference inorganic silicic acid salts solution slurry carries out chemical reaction with the agent of inorganic silicate auxiliary curing agent and reactive metal powder, can obtain the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz, wherein inhale the ripple powder and have certain oil absorbency, disperseing to stir under the effect of shearing force, coated by the inorganic silicic acid salts solution, obtaining particle diameter is 40 μ m and following grinding dispersion.The anti-electromagnetic interference coating material of inorganic silicate of the present invention is to the absorption of electromagnetic wave of 0.6-18GHz frequency range more than 85%, corrosion resistance and good, the mechanical property height, has good construction performance, have long-acting anti-electromagnetic interference effect, can be used for the field, place that mobile communication base station, electric locomotive, high voltage substation etc. easily produce the high-frequency electromagnetic wave excitation.
Description of drawings
Fig. 1 is the grain morphology synoptic diagram of composite wave-absorbing powder of the present invention;
Fig. 2 is the reflectance curve synoptic diagram of coated material of the present invention.
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Embodiment
Embodiment 1
1) under agitation condition, 0.6-18GHz suction ripple powder, 5.4% reactive metal powder, 4% cenosphere with 68% mix with 18% inorganic silicic acid salts solution, evenly disperse alr mode to prepare stealthy powder inorganic silicic acid salts solution slurry.
2) before the construction, under agitation condition, add 4.6% nonessential auxiliary curing agent phosphoric acid solution or magnesium chloride solution in the stealthy powder inorganic silicic acid salts solution slurry in (1) and make the anti-electromagnetic interference coating of inorganic silicate.
3) normal temperature bottom roll or spraying application, i.e. film-forming.
Embodiment 2
1) under agitation condition, 0.6-18GHz suction ripple powder, 6% reactive metal powder, 5% cenosphere with 65% mix with 20% inorganic silicic acid salts solution, evenly disperse alr mode to prepare stealthy powder inorganic silicic acid salts solution slurry.
2) before the construction, under agitation condition, add 4% nonessential auxiliary curing agent phosphoric acid solution or magnesium chloride solution in the stealthy powder inorganic silicic acid salts solution slurry in (1) and make the anti-electromagnetic interference coating of inorganic silicate.
3) normal temperature bottom roll or spraying application, i.e. film-forming.
Embodiment 3
1) under agitation condition, 0.6-18GHz suction ripple powder, 4.8% reactive metal powder, 4.5% cenosphere with 64% mix with 21% inorganic silicic acid salts solution, evenly disperse alr mode to prepare stealthy powder inorganic silicic acid salts solution slurry.
2) before the construction, under agitation condition, add 5.7% nonessential auxiliary curing agent phosphoric acid solution or magnesium chloride solution in the stealthy powder inorganic silicic acid salts solution slurry in (1) and make the anti-electromagnetic interference coating of inorganic silicate.
3) normal temperature bottom roll or spraying application, i.e. film-forming.
The anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate that adopts above-described embodiment 1 to prepare is sprayed on the flat aluminium alloy plate matrix, makes square standard coated and inhales the ripple plate, and inhaling the ripple layer thickness is 1 mm, and the reflectance curve of microwave absorbing coating as shown in Figure 2.As seen, have in all wave band of 0.6-18GHz and be better than-absorbing property of 15dB.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all is included within protection scope of the present invention.
Claims (9)
1. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of a 0.6-18GHz is characterized in that it is made by following raw material: inhale ripple powder, inorganic silicic acid salts solution, nonessential auxiliary curing agent, nonessential reactive metal powder, nonessential cenosphere.
2. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1 is characterized in that the weight percentage that described each raw material accounts for total raw material is respectively: inhale ripple powder 64%-68%; Inorganic silicic acid salts solution 18%-21%; Auxiliary curing agent 4%-5.7%; Reactive metal powder 4.8%-6%; Cenosphere 4%-5% is preferably and inhales ripple powder 68%; Inorganic silicic acid salts solution 18%; Auxiliary curing agent 4.6%; Reactive metal powder 5.4%; Cenosphere 4%.
3. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1 is characterized in that described suction ripple powder is is Fe by component
85Si
2Al
6Cr
7Magneticalloy powder and component be (Ba
0.7Sr
0.3)
3Ni
2Fe
24O
41Z type hexgonal screw material be composited by the mass ratio of 2:3.
4. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1, it is characterized in that described inorganic silicic acid salts solution is selected from modulus at 2.4-8 lithium silicate solution, sodium silicate solution, the composition of one or more in the potassium silicate solution.
5. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1 is characterized in that described nonessential auxiliary curing agent is selected from a kind of in phosphoric acid solution or the magnesium chloride solution.
6. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1 is characterized in that described nonessential reactive metal powder is selected from active zinc powder, the one or more combination in the activated aluminum powder.
7. the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1 is characterized in that described nonessential cenosphere is selected from one or more the composition in hollow glass bead, ceramic hollow microballon, the hollow grey microballon of fine coal.
8. the anti-electromagnetic interference coating preparation methods of suction ripple powder/inorganic silicate of 0.6-18GHz as claimed in claim 1 is characterized in that comprising following steps:
1) under agitation condition, will inhale ripple powder, reactive metal powder, cenosphere and mix with the inorganic silicic acid salts solution, evenly disperse alr mode to prepare stealthy powder inorganic silicic acid salts solution slurry;
2) before the construction, under agitation condition, 1) in stealthy powder inorganic silicic acid salts solution slurry in add nonessential auxiliary curing agent and make the anti-electromagnetic interference coating of inorganic silicate;
3) normal temperature bottom roll or spraying application, i.e. film-forming.
9. one kind as the anti-electromagnetic interference coating material of suction ripple powder/inorganic silicate of any described 0.6-18GHz among the claim 1-8 metal object surface in required shielding, as the application in fields such as electric locomotive chassis, electrical equipment, power transmission and transformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310194920.7A CN103275529B (en) | 2013-05-23 | 2013-05-23 | Suction ripple powder/inorganic silicate electromagnetism interference coated material of a kind of 0.6-18GHz frequency range and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310194920.7A CN103275529B (en) | 2013-05-23 | 2013-05-23 | Suction ripple powder/inorganic silicate electromagnetism interference coated material of a kind of 0.6-18GHz frequency range and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN103275529A true CN103275529A (en) | 2013-09-04 |
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| CN108793934A (en) * | 2018-08-22 | 2018-11-13 | 四川央润科宇科技有限公司 | Wave composite material and preparation method thereof is inhaled in a kind of superconduction |
| CN110740626A (en) * | 2018-10-29 | 2020-01-31 | 嘉兴学院 | Preparation method of composite electromagnetic shielding materials of copper and ceramic powder |
| CN115612324A (en) * | 2022-10-14 | 2023-01-17 | 中国科学院赣江创新研究院 | Radar wave-absorbing coating and preparation method and application thereof |
| CN115873440A (en) * | 2022-10-31 | 2023-03-31 | 航天科工武汉磁电有限责任公司 | High-temperature-resistant wave-absorbing coating and preparation method thereof, broadband wave-absorbing material and preparation method thereof |
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| CN107660111A (en) * | 2016-07-05 | 2018-02-02 | 中国人民解放军军械工程学院 | A kind of preparation method of amorphous li Zn ferrite cenosphere low-frequency wave-absorbing material |
| CN108793934A (en) * | 2018-08-22 | 2018-11-13 | 四川央润科宇科技有限公司 | Wave composite material and preparation method thereof is inhaled in a kind of superconduction |
| CN108793934B (en) * | 2018-08-22 | 2021-07-16 | 严欣 | Novel superconducting wave-absorbing composite material and preparation method thereof |
| CN110740626A (en) * | 2018-10-29 | 2020-01-31 | 嘉兴学院 | Preparation method of composite electromagnetic shielding materials of copper and ceramic powder |
| CN110740626B (en) * | 2018-10-29 | 2020-11-03 | 嘉兴学院 | Preparation method of composite electromagnetic shielding material of copper and ceramic powder |
| CN115612324A (en) * | 2022-10-14 | 2023-01-17 | 中国科学院赣江创新研究院 | Radar wave-absorbing coating and preparation method and application thereof |
| CN115612324B (en) * | 2022-10-14 | 2024-01-16 | 中国科学院赣江创新研究院 | Radar wave-absorbing coating and preparation method and application thereof |
| CN115873440A (en) * | 2022-10-31 | 2023-03-31 | 航天科工武汉磁电有限责任公司 | High-temperature-resistant wave-absorbing coating and preparation method thereof, broadband wave-absorbing material and preparation method thereof |
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