CN206196246U - Electromagnetic radiation absorbing structure - Google Patents
Electromagnetic radiation absorbing structure Download PDFInfo
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- CN206196246U CN206196246U CN201620755900.1U CN201620755900U CN206196246U CN 206196246 U CN206196246 U CN 206196246U CN 201620755900 U CN201620755900 U CN 201620755900U CN 206196246 U CN206196246 U CN 206196246U
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Abstract
The utility model provides an electromagnetic radiation absorbing structure, including the base member, its characterized in that: a plurality of little carbon line circles have in this base member, is 0.5% of absorbing material gross weight enclosed to the carbon line a little 10%, a little carbon line circle has one or more length in order realizing different frequency domain electromagnetic assimilation effects, the utility model discloses an optimal conditions is that the carbon line circle that should decline has the multiple length between 10 microns to 5 millimeters, the respectively spiral diameter of carbon line circle and comparing 1 of pitch a little: 1 5 between, carbon filament diameter and spiral diameter are 1: 5 10 between. The utility model discloses still relate to the electromagnetic radiation absorbing structure who has multilayer structure, including the base member, its characterized in that: this base member has at least one main material layer and assists the material layer with at least one, and this main material layer as above. The utility model provides a carry out the essence solution of active absorption to space electromagnetic radiation, have that the ripples of inhaling frequency domain is wide, efficient, the material is frivolous, low cost, be fit for quantifing advantage such as production.
Description
Technical field
The utility model belongs to electromagnetic shielding and absorption techniques field, and in particular to a kind of absorption of electromagnetic radiation structure.
Background technology
With the improvement of living standards, during electrical equipment miscellaneous appears in average family, such as refrigerator, washing machine, mobile phone,
Wireless router etc., the thing followed is exactly electromagnetic radiation puzzlement in addition to facility in life, also；Even if it is few with or without
Electrical equipment, the space that we are lived still is flooded with the electromagnetic radiation of various frequencies, and these electromagnetic radiation sources are in outdoor height
Force feed electric wire, transformer station, transformer, communication base station, communications satellite etc..In theory, all can as long as having and using electric device, machine
Produce certain electromagnetic radiation, the electromagnetic radiation of these shape form formulas is generally present in us at one's side just as air, and it is right to be not only
, also all there is harm to precision electronic device in human body.According to investigations, electromagnetic radiation of mobile telephone can be to nearly 60 percent low coverage
Influence is produced from medicine equipment, its misoperation is caused.Therefore the electromagnetic radiation protection of broadcast and TV radiating station, microwave dark room elimination
The electromagnetic interference of equipment and communication and navigation system, security information secrecy, industrial science and Medical Devices etc. are to electro-magnetic wave absorption
Material has strong demand.
As solution, come in shielding space there has been proposed many electromagnetic shielding materials and electromagnetic wave absorbent material
Extraneous electromagnetic radiation.At present institute widely used ELECTROMAGNETIC RADIATION SHIELDING technology nearly all be utilize high conductivity metal material
Thin plate is reflected electromagnetic radiation, prevents it from being directly entered in shield ranges, but reflection after electromagnetic radiation be still in sky
Between it is central, it is clear that this be not protect electromagnetic radiation essence countermeasure, be sought after real electromagnetic wave absorbent material, both at home and abroad
Conventional absorbing material is ferrite, but with the innovation sexual development of science and technology, such as high speed road traffic system ITS communications set
The high speed of standby, wireless network, various media machines equipment, computer etc., radar SAR, electron spin resonance device ESR, high speed
Highway vehicles peccancy automatic control system ORBIS, fixed satellite communications, automobile anti-collision device ITS, the electromagnetic wave of automotive interior
Pollution guard system, trailer-mounted radar etc. are also increasingly improved to the performance requirement of absorbing material, require the suction that can provide wide frequency domain
Wave technology.The stealth technique and pseudomorphism of aircraft and ship the anti-stealth technology such as prevent, scout detection, communication technical field, number
The research and development of the wideband high-performance novel absorbing material of hundred MHz to GHz up to a hundred turn into the focus of concern.
Wave absorbing agent of the prior art mainly includes ferrite wave-absorbing material, carbon fiber structural wave-absorbing material, nano wave-absorption
Material, polycrystalline iron fiber absorbing material and conduction high polymer absorbing material etc., but these absorbing materials dielectric parameter and magnetic conductance
Rate is difficult to be realized on frequency band wider areflexia requirement, exists that frequency band is narrow, can only realize below 20GHz frequency ranges and absorbs, effect
The shortcomings such as rate is low, density is big, its range of application is subject to a definite limitation, by its obtained absorbing material absorbing property not
It is good.
Utility model content
Based on the problem mentioned in background technology, the utility model proposes a kind of absorption of electromagnetic radiation structure, there is provided right
Spacing electromagnetic radiation carries out the essence solution of effective absorption, and with inhaling, wave frequency field width, efficiency high, material be frivolous, cost
The advantages of cheap, suitable amount metaplasia is produced, its particular technique content is as follows：
A kind of absorption of electromagnetic radiation structure, including matrix, have multiple micro- carbon line circles in the matrix, micro- carbon line encloses suction
There is the 0.5%-10% of wave material gross weight, micro- carbon line circle one or more size to realize the suction to different domain electromagnetic ripples
Produce effects really, the size includes the tune to one or more parameters in length, pitch, screw diameter, the carbon line diameter of micro- carbon line circle
It is whole.
In the middle of one or more embodiments of the present utility model, micro- carbon line circle has between 10 microns to 5 millimeters
Different lengths.
In the middle of one or more embodiments of the present utility model, the ratio between screw diameter and pitch of each micro- carbon line circle are 1：
Between 1-5, carbon filament diameter is with screw diameter 1：Between 5-10.
In the middle of one or more embodiments of the present utility model, micro- carbon line encloses the 1%-3% of absorbing material weight.
In the middle of one or more embodiments of the present utility model, conductive coating on micro- carbon line circle.
In the middle of one or more embodiments of the present utility model, there are some assistant agents in the matrix, those assistant agents include
One kind in granulated carbon, bar-shaped carbon, metal dust, sheet metal, ferrite.
In the middle of one or more embodiments of the present utility model, being processed through nanoencapsulation before metal dust addition makes
Absorbing material is integrally not that metallicity is presented, and reduces reflection of the metal to electromagnetic wave, improves impedance matching.
In the middle of one or more embodiments of the present utility model, the matrix has metal level.
A kind of absorption of electromagnetic radiation structure, including matrix, the matrix include at least one main material layer and at least one auxiliary material
Layer；Main material layer is the absorption of electromagnetic radiation structure in such scheme, and having in auxiliary material layer includes granulated carbon, bar-shaped carbon, gold
A kind of assistant agent in category powder, sheet metal, ferrite；Wherein, processed through nanoencapsulation before metal dust addition.
In the middle of one or more embodiments of the present utility model, the matrix also includes metal back layer.
Compared with prior art, its superiority is embodied in the utility model：Micro- carbon line circle of the present utility model utilize thirdly
Dimension helical structure produces magnetic strength electromotive force in electromagnetic field, finally in the form of heat energy that energy release is electric to reach efficient absorption
The effect of magnetic wave.This be different from it is existing by ELECTROMAGNETIC RADIATION REFLECTION make the return trip empty between scheme, but fundamentally realize to electromagnetism spoke
Inject row sorption enhanced, and optimal absorption efficiency is up to more than 99%.Meanwhile, the electricity of the three-dimensional structure of micro- carbon line circle to any direction
Magnetic radiation can realize efficient absorption, and can accomplish to allow absorbing material two sides to open, and allow electromagnetic radiation well into if should
For electrical equipment, not only all electromagnetic radiation almost outside shielding electrical equipment, and the electromagnetic radiation that electrical equipment inside is produced also can
Absorbed, can be indoor construction more preferably low electromagnetic environment, or even electromagnetic-radiation-free environment.
The utility model is the product for possessing brilliance no matter from technical, practicality or economy, is adapted to
Promote the use of.
Brief description of the drawings
Fig. 1 is the structural representation of absorption of electromagnetic radiation constructive embodiment one of the present utility model.
Fig. 2 is micro- carbon line circle schematic equivalent circuit of absorption of electromagnetic radiation structure of the present utility model.
Fig. 3 is the structural representation of absorption of electromagnetic radiation constructive embodiment two of the present utility model.
Fig. 4 is the structural representation of absorption of electromagnetic radiation constructive embodiment three of the present utility model.
Fig. 5 is the structural representation of absorption of electromagnetic radiation constructive embodiment four of the present utility model.
Fig. 6 is the structural representation of absorption of electromagnetic radiation constructive embodiment five of the present utility model.
Fig. 7 is the electromagnetic wave absorptivity test data chart one of absorption of electromagnetic radiation structure of the present utility model.
Fig. 8 is the electromagnetic wave absorptivity test data chart two of absorption of electromagnetic radiation structure of the present utility model.
Fig. 9 is the electromagnetic wave absorptivity test data chart three of absorption of electromagnetic radiation structure of the present utility model.
Figure 10 is the electromagnetic wave absorptivity test data chart four of absorption of electromagnetic radiation structure of the present utility model.
Figure 11 is the electromagnetic wave absorptivity test data chart five of absorption of electromagnetic radiation structure of the present utility model.
Specific embodiment
Below in conjunction with accompanying drawing, application scheme is further described：
Embodiment one：
Referring to the drawings 1, a kind of absorption of electromagnetic radiation structure, including matrix 1 has multiple micro- carbon line circles 2 in the matrix 1,
Micro- carbon line circle 2 accounts for the 0.5%-10% of absorbing material gross weight, and there is micro- carbon line circle 2 one or more size to realize to not
With the assimilation effect of domain electromagnetic ripple, specifically, micro- carbon line circle 2 has the different lengths between 10 microns to 5 millimeters, it is excellent
It is 0.5-3 millimeters to select practical range；The ratio between screw diameter and pitch of each micro- carbon line circle 2 are 1：Between 1-5, carbon filament diameter and spiral shell
Rotation diameter is 1：Between 5-10；Especially, the preferred version for being used in the present embodiment is：It is total that micro- carbon line circle 2 accounts for absorbing material
The 1%-3% of weight.
Micro- carbon line circle 2 form under an electron microscope, it can be seen that micro- carbon line astragal is regular helix body, and tool
There is obvious pitch, this realization to wave-absorbing effect is significant with the adjustment for absorbing frequency domain.
Micro- carbon line circle 2 has a three-dimensional spiral structure, and with resistance R, electric capacity C and inductance L characteristics (equivalent circuit referring to
Accompanying drawing 2), can be learnt by Faraday's electromagnetic induction law, conductor coils can produce induction electromotive force in variation magnetic field, then
Produce electric current, the utility model exactly dexterously to apply the physical phenomenon, make micro- carbon line Fig. 2 that magnetic strength electricity is produced in electromagnetic field
Kinetic potential, is finally discharged energy in the form of heat energy by self-resistance, and due to its chiral material feature, it lures electricity to micro- carbon line circle 2
Rate and magnetic susceptibility are big, and the attenuating of electromagnetic wave is become apparent than general lure electrical loss and magnetic losses material, incident straight
Line partial wave electromagnetic wave (having level, vertical component) becomes the two garden partial waves (anticlockwise, right rotation) in left and right, and in micro- carbon line circle
Reflection/loss at random is produced in 2 and electromagnetic wave is further subtracted and is declined, by adjusting hand-type parameter (coil pitch P and coil diameter
DCThe ratio between and coil diameter and wire diameter DfThe ratio between) material areflexia can be made, this is fundamentally to realize entering electromagnetic radiation
Row sorption enhanced, and optimal absorption efficiency is up to more than 99%, this and ferritic principle of electromagnetic shield-ing are essentially different.
Meanwhile, the two sides of absorbing material can allow electromagnetic radiation to enter, if being applied on electrical equipment, not only almost shield electricity
All electromagnetic radiation outside device, and the electromagnetic radiation that electrical equipment inside is produced can also be absorbed, can be for indoor construction more preferably
Low electromagnetic environment, or even electromagnetic-radiation-free environment.
Formula is calculated according to reflectance factor
Wherein, R is reflectance factor, and Zin is interface ripple
Impedance, Z0It is air impedance, μ is magnetic conductivity, and ε is dielectric constant；Work as Zin=Z0When, R=0, the i.e. material and free space wave
Impedance is reflected into zero up to matching, such electromagnetic wave.Can be by selecting the size modes of matrix material, micro- carbon line circle (suitable
In selection magnetic conductivity and dielectric constant), to adjust the impedance matching of absorbing material and place space, imitated with reaching suction ripple higher
Rate.
The comprehensive evaluation index (e) of electromagnetic wave absorbent material, is represented with formula the following
E=Δs F λ/fdW；
Wherein, Δ F is that more than -20dB frequency with domains, λ are that wavelength, f frequencies, d are that the thickness of absorber, W are that thin layer is inhaled
Receive the weight of material.The composite index of the thin layer absorbing material (ferrite) of in the market is usually e=4.6~5.5, and this reality
With the composite index of novel wave-absorbing material up to more than e=6.5, very excellent absorbing property is shown as.
Micro- carbon line circle belongs to chiral material, and the chiral parameter of regulation can make material areflexia, and it has two compared with common material
Individual advantage:One is that the chiral parameter of adjustment is easier than adjustment dielectric parameter and magnetic conductivity；Two is the frequency sensitivity ratio of chiral material
Dielectric constant and magnetic conductivity are small, easily realize that wideband absorbs.So far, do not find also natural to be worked in microwave range
Chiral material because microwave wavelength differs larger with the molecular dimension of material.For radar invisible in military affairs
Chiral material be all it is artificial synthesized, this be due to only with the chiral material of incident wavelength adjoining dimensions could and incidence wave
Phase separation, therefore the chiral material of matrix kind doping must have the characteristic size of same magnitude with microwave wavelength.
Embodiment two：
Referring to the drawings 3, on the basis of above-described embodiment one, also there are some assistant agents in the matrix 1, those assistant agents include
It is granulated carbon 3 (this material carbon 3 can be carbon black, graphite powder or crush gained carbon dust by micro- carbon line circle of the present utility model), bar-shaped
Carbon 4 (the bar-shaped carbon 4 can be a nanometer carbon-point, the straight carbon fiber of vapor phase growth), aluminium chips 5 and ferrite 6, those assistant agents are respective
Addition accounts for the 0.1%-8% of absorbing material weight, wherein, addition as ferrite 6 is account for absorbing material weight 5%, its
Remaining these assistant agent (granulated carbon 3, bar-shaped carbon 4, aluminium chips 5) additions of auxiliary are preferred for 1%.
The addition of mentioned component, ferrite improves inductance L, increases magnetic loss；Carbon dust and carbon-point then due to micro- carbon line circle
Overlap and influence resistance R, increase electrical loss；Matrix is then that electric capacity C is made contributions, and increases dielectric loss；It is total to by those compositions
With resonator system is constituted, LCR resonance is strengthened on the whole；Additionally, the assistant agent is conductor, it contacts or takes with micro- carbon line circle 2
Being connected between some micro- carbon line circles 2 can change the LCR characteristics of micro- carbon line circle 2, so that LC resonant frequencies are influenceed, so LCR resonates
Not only further broadening absorbs frequency domain or lifts wave absorbing efficiency in certain frequency domain, and increases absworption peak number.Simultaneously, it is contemplated that
Electromagnetic wave is allowed to be incident to inside absorbing material as much as possible, this requires that the reflecting system of material surface is as low as possible；According to anti-
Coefficient formulas are penetrated, the metal dust etc. the means such as nanoencapsulation treatment is taken into before addition, to adjust absorbing material
With the impedance matching in place space, to reach wave absorbing efficiency higher.
The utility model is not only and encloses effect, or multiple micro- carbon line figures and multiple auxiliary material lists with single micro- carbon line
Unit is resonated even to take by LCR and worked, so the size dimensionally with electromagnetic wave is similar, therefore can reach the height in wide band
Absorptivity.LCR resonance circuits produce very big electromagnetically induced effect to the resonant frequency of electromagnetic wave, produce very big induction electromotive force,
So as to form induced current, heat energy is become by the R component of LCR electronic loops.So as to be radiated at the electricity of the electromagnetic wave of micro- carbon line circle
Field and magnetic field energy enough can expeditiously be converted into heat energy in it resonates band domain.
Embodiment three：
Referring to the drawings 4, on the basis of above-described embodiment one, the matrix 1 is provided with metal level 7 in flake, its bottom surface, gold
Category layer 7 can be reflected electromagnetic wave, and micro- carbon line circle 2 and other assistant agents are returned in the reflection of electromagnetic wave that order will be travelling through matrix 1, are carried out
Secondary, three even multiple absorptions；When the absorbing material of the present embodiment is invested into electronic instrument surface, will effectively reduce first
Remaining electromagnetic wave is returned in the middle of air, has secondly also been prevented remaining electromagnetic wave and has been passed through absorbing material into inside electronic instrument.Together
Sample, it is also possible to metal level is set on the basis of embodiment two, is not stated carefully one by one herein.
Example IV：
Referring to the drawings 5, a kind of absorption of electromagnetic radiation structure, it includes matrix, the matrix include main material layer 101a and 101b,
Auxiliary material layer 102a, 102b, 102c and 102d；
Main material layer 101a and 101b is interior respectively to have multiple micro- carbon line circles 2, and micro- carbon line circle 2 accounts for main material layer gross weight
0.5%-10%, micro- carbon line circle 2 has one or more size to realize the assimilation effect to different domain electromagnetic ripples, specifically
, micro- carbon line circle 2 has a different lengths between 10 microns to 5 millimeters, the screw diameter and pitch of each micro- carbon line circle 2 it
Than 1：Between 1-5, carbon filament diameter is with screw diameter 1：Between 5-10；Especially, the preferred version for being used in the present embodiment
It is：Micro- carbon line circle 2 accounts for the 1%-3% of absorbing material gross weight；
There is bar-shaped carbon 4 in auxiliary material layer 102a, there are aluminium chips 5, tool in auxiliary material layer 102c in auxiliary material layer 102b
There is the particle of ferrite 6, there is granulated carbon 3 in auxiliary material layer 102d, the addition of assistant agent accounts for the layer weight in each auxiliary material layer
0.1%-8%, wherein, addition as ferrite 6 is account for absorbing material weight 5%, remaining aid in these assistant agents (granulated carbon 3,
Bar-shaped carbon 4, aluminium chips 5) addition is preferred for 1%.
Embodiment five：
Referring to accompanying drawing 6, on the basis of above-described embodiment four, matrix is additionally provided with metal back layer 103.The meeting of metal back layer 103
Electromagnetic wave is reflected, micro- carbon line circle 2 and other assistant agents are returned in the reflection of electromagnetic wave that order will be travelling through matrix, carry out it is secondary, three
Secondary or even multiple absorption；When the absorbing material of the present embodiment is invested into electronic instrument surface, remaining electricity will be effectively reduced first
Magnetic wave is returned in the middle of air, has secondly also been prevented remaining electromagnetic wave and has been passed through absorbing material into inside electronic instrument.
In the various embodiments described above, the matrix is polymer composite, including polyurethane matrix, siloxane matrix, various
The copolymer of thermoplastic elastomer (TPE), or other are with resin matrix that is elastic and being easily molded, for example, Japan SHIN-ETSU HANTOTAI KE is serial
Siloxane matrix (such as KE-103, KE-109), the Septon resins of Kuraray companies, the liquid of big Japanese ink chemistry (strain)
Epoxy resin EXA-5850-150, commercial resins type emulsion paint etc..
Absorbing material can be made integrally to be not additionally, micro- carbon line circle 2, metal dust is processed before addition through nanoencapsulation
Metallicity is presented, reduces reflection of the metal to electromagnetic wave, improve impedance matching；For example, plating sets carbon-coating on micro- carbon line circle 2,
The electro-magnetic wave absorption to below 1GHz frequency ranges can effectively be strengthened；Referring to accompanying drawing 9, micro- carbon line circle 2 of plating carbon film is dispersed in epoxy
In resin, cuboid box the inside is mounted in, is tested with sonde method (Probe method), had in 400-900MHz fields
More than 90% absorptivity.And plating sets nickel (Ni) layer on micro- carbon line circle 2, the magnetic loss of material can be increased, be lifted to electromagnetic wave
Fade performance.
It is below the checking data of absorbing property of the present utility model：
First, the relation of the length of micro- carbon line circle and wave absorbing efficiency
Referring to accompanying drawing 8, made to 10GHz wave band electromagnetism with micro- carbon line circle of 0.01-0.5mm and 0.6-1.1mm length respectively
Ripple absorption rate testing, test determines the absorptivity of electromagnetic wave using free-space Method：
In figure, curve a inhales the gross data of ripple rate for micro- carbon line circle of 0.6-1.1mm length, and curve c is 0.6-1.1mm
Micro- carbon line circle of length inhales the measured data of ripple rate；Curve b inhales the theoretical value of ripple rate for micro- carbon line circle of 0.01-0.5mm length
According to curve d inhales the measured data of ripple rate for micro- carbon line circle of 0.01-0.5mm length；
From data and curves it is known that micro- carbon line circle of 0.6-1.1mm length is inhaled, ripple rate is real-valued and theoretical value is basically identical,
Being displayed in 10 to 10.2GHz scopes has more than 32dB numerical value, and has the absorption of more than 20dB in 9-11GHz；And 0.01-
Micro- carbon line circle of 0.5mm length is in then weak absorbing in the wavelength band, this illustrate micro- carbon line circle to a certain wave band electromagnetism
Ripple absorptivity is related to its length.
2nd, the relation of the doping of micro- carbon line circle and wave absorbing efficiency
Referring to accompanying drawing 9, the survey that micro- carbon line circle content is 0.1%, 0.5%, 1%, 1.5%, 5% and 10% is included in figure
Examination data and curves, it can be seen that content too low (0.1%-0.5%) and too high levels (more than 6%) are equally difficult to play preferably suction
Ripple effect, it is typically more suitable with 1% to 3% doping proportion, especially in 1% or so tool most preferably wave-absorbing effect.
3rd, influence of the assistant agent to wave absorbing efficiency
Referring to accompanying drawing 10, assistant agent is added in the middle of the matrix material being combined to single or multiple lift, and is carried out in 8-30GHz frequency ranges
Experiment；In figure, suction ripple rate data when "---" curve is only comprising micro- carbon line circle, "-" curve includes micro- carbon line circle and many
Plant suction ripple rate data during assistant agent (one or more in granulated carbon, bar-shaped carbon, aluminium chips)；It can be seen that micro- carbon line cycle basis plinth
Upper addition assistant agent, suction wavestrip is significantly widened in 8-30GHz frequency ranges.
4th, the comparing of micro- carbon line circle and common carbon dust wave-absorbing effect
Referring to accompanying drawing 11, matrix is mixed with micro- carbon line circle or common carbon dust merely and is made absorbing material, curve a in figure, b,
It is respectively the rubber-ferrite curve of several common carbon dusts in market with c, curve A and B are respectively micro- carbon line circles of different shape
Inhale wave profile, it can be seen that micro- carbon line circle has significant wave-absorbing property (having absorption numerical value more than -20dB) and suction wider
Wavestrip domain, and have to a certain frequency it is obvious absorb crest, the absorption numerical value of nearly -25dB, its by micro- carbon line circle chi
It is very little：Length, pitch, screw diameter, carbon line diameter-determined), and common carbon dust is due to possessing loop shape, so inhaling
Wave effect is not notable.
5th, micro- carbon line circle of the present utility model and the suction ripple test data of other carbon materials are exemplified below
1) low-frequency range test；Specifically tested with guided wave tube method in 0-14GHz band limits, matrix uses silicon rubber
Material, carbon material proportion 5%, is listed below test data：
From the above data, it can be seen that in the band limits, the wave-absorbing effect of common carbon material is poor, or even substantially not
In wave-absorbing effect；Micro- carbon line circle of the present utility model presents preferably absorbing property, and by its length and corresponding wave band ripple
Length is close, and wave absorbing efficiency is also obviously improved.
2) high band test；Specifically determined with free-space Method in 12-110GHz, matrix is using polyurethane PU or letter
More polysiloxanes KE or polymetylmethacrylate, matrix thickness 3mm；
Participate in other absorbing materials of test：Graphite powder GC, straight line carbon fiber CF, ferrite Fer；Specifically by following composition
Combine to be tested：
Formula 1：GC 3%/PU；(GC is crushed to less than 1 micron particle by micro- carbon line circle, without coil shape)
Formula 2：CF 3%/PU；(CF is linear pattern carbon fiber, without coil shape)
Formula 3：(length is 300-500 μm to the micro- carbon line circle/PU of length, and 1%) proportion be
Formula 4：(length is less than 90 μm to short micro- carbon line circle/PU, and 1%) proportion be
Formula 5：(length is 300-500 μm to the micro- carbon line circle/KE of length, and 1%) proportion be
Formula 6：(length is 300-500 μm to the micro- carbon line circle/PMMA of length, and 1%) proportion be
Formula 7：Short micro- micro- carbon line circle/PMMA of carbon line circle/PU//length (is expressed as two-layer compound, between layers with // table
Show；The length of short micro- carbon line circle is less than 90 μm, and proportion is 1.5%；The length of the micro- carbon line circle of length is 300-500 μm, and proportion is
1%)
Formula 8：Short micro- micro- carbon line circle/GC/PMMA of carbon line circle/CF/PU//length (is expressed as two-layer compound, between layers
With // represent；The length of short micro- carbon line circle is less than 90 μm, and proportion is 1.5%；The length of the micro- carbon line circle of length is 300-500 μm, than
1%) weight is
Formula 9：Short micro- micro- carbon line circle/GC/Fer/PMMA of carbon line circle/CF/Fer/PU//length (is expressed as two-layer compound, layer
With // expression between layer；The length of short micro- carbon line circle is less than 90 μm, and proportion is 1.5%；The length of the micro- carbon line circle of length is 300-
500 μm, 1%) proportion be
Wherein, " length " and " short " in the micro- carbon line circle of above-mentioned length and short micro- carbon line circle is relative concept, to realize to micro-
The differentiation of code loop length.
Specific test data see the table below：
From the above data, it can be seen that in the range of high-frequency band, common carbon material shows as not absorbing substantially, and this reality
Preferably absorbing property is presented with new micro- carbon line circle, and more can intuitively be found out：Micro- carbon line of different length
Enclose when the wavelength of correspondence wave band is close, wave absorbing efficiency is obviously improved；It is various assistant agents addition (such as GC, CF, Fer), many
Individual absorbed layer has active influence to the overall absorption effect of absorbing material.
It is that above-mentioned preferred embodiment should be regarded as application scheme implementation method for example, all with application scheme thunder
Technology deduction that is same, approximately or based on this making, replacement, improvement etc., are regarded as the protection domain of this patent.
Claims (10)
1. a kind of absorption of electromagnetic radiation structure, including matrix, it is characterised in that：There are multiple micro- carbon line circles, this is micro- in the matrix
Carbon line encloses the 0.5%-10% of absorbing material gross weight, and there is micro- carbon line circle one or more size to realize to different frequency domains
The assimilation effect of electromagnetic wave, the size is included to one or many in length, pitch, screw diameter, the carbon line diameter of micro- carbon line circle
The adjustment of individual parameter.
2. absorption of electromagnetic radiation structure according to claim 1, it is characterised in that：Micro- carbon line circle has at 10 microns extremely
Different lengths between 5 millimeters.
3. absorption of electromagnetic radiation structure according to claim 1 and 2, it is characterised in that：The screw diameter of each micro- carbon line circle
With the ratio between pitch 1：Between 1-5, carbon filament diameter is with screw diameter 1：Between 5-10.
4. absorption of electromagnetic radiation structure according to claim 1 and 2, it is characterised in that：Micro- carbon line encloses absorbing material
The 1%-3% of weight.
5. absorption of electromagnetic radiation structure according to claim 1 and 2, it is characterised in that：There is conduction on micro- carbon line circle
Property coating.
6. absorption of electromagnetic radiation structure according to claim 1, it is characterised in that：There are some assistant agents in the matrix, should
A little assistant agents include the one kind in granulated carbon, bar-shaped carbon, metal dust, sheet metal, ferrite.
7. absorption of electromagnetic radiation structure according to claim 6, it is characterised in that：Through nanometre glue before metal dust addition
Encapsulated treatment makes absorbing material integrally be not that metallicity is presented, and reduces reflection of the metal to electromagnetic wave, improves impedance matching.
8. absorption of electromagnetic radiation structure according to claim 1, it is characterised in that：The matrix has metal level.
9. a kind of absorption of electromagnetic radiation structure, including matrix, it is characterised in that：The matrix is including at least one main material layer and at least
One auxiliary material layer；Main material layer is the absorption of electromagnetic radiation structure as described in claim 1 to 5 any one, in auxiliary material layer
With including a kind of assistant agent in granulated carbon, bar-shaped carbon, metal dust, sheet metal, ferrite；Wherein, metal dust addition
It is preceding to be processed through nanoencapsulation.
10. absorption of electromagnetic radiation structure according to claim 9, it is characterised in that：The matrix also includes metal back layer.
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|---|---|---|---|---|
| CN108936960A (en) * | 2018-07-09 | 2018-12-07 | 唐山德善中医药科技发展有限公司 | A kind of independent assortment energy of a quantum unit insole |
| CN109541672A (en) * | 2018-11-21 | 2019-03-29 | 华东师范大学 | A kind of detection method and device of electron spin transient state information |
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