CN109912273A - A kind of radar microwave radiation two-layer compound protective materials - Google Patents
A kind of radar microwave radiation two-layer compound protective materials Download PDFInfo
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- CN109912273A CN109912273A CN201910142559.0A CN201910142559A CN109912273A CN 109912273 A CN109912273 A CN 109912273A CN 201910142559 A CN201910142559 A CN 201910142559A CN 109912273 A CN109912273 A CN 109912273A
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Abstract
The present invention relates to a kind of radar microwaves to radiate two-layer compound protective materials; including wave absorption magnetic conduction thermal control material and inhale wave shielding material; wave absorption magnetic conduction thermal control material in cement by adulterating wave absorption agent, glass bead; optimize impedance matching; the closed cavity of reflection of electromagnetic wave consumption is provided, converts thermal energy for more electromagnetic waves；Wave shielded layer is inhaled by doped ferric oxide skin, staple fiber in cement, and the shielded layer of dense uniform is provided.Radar microwave radiation two-layer compound protective materials of the present invention is in wide frequency range, effectiveness is good, it is provided simultaneously with heat preservation, fireproof performance, can be used for the key area that radar station microwave radiation protecting and Satellite Communication Transmit base station etc. need microwave radiation protecting.
Description
Technical field
The invention belongs to the field of building materials, and in particular to a kind of radar microwave radiation two-layer compound protective materials.
Background technique
Radar station workspace, living area and radar are at a distance of relatively close.Indoor electromagnetic radiation intensity has generally exceeded the standard.For a long time by
The influence of electromagnetic pollution can be such that human immunity function declines, and eyes and the reproductive function for influencing people are impaired.Cause individual cells function
It is impaired, generate canceration, leukemogenesis, the malignant tumours such as cutaneum carcinoma.Associated mechanisms once stopped the healthy feelings of employment person to radar
Condition carried out medical survey, by taking certain radar station as an example, 430 people of respondent person, wherein 38% generation paropsia changes, 40%
Biochemical indicator is abnormal, 35.2% neurasthenia, 52.8% electrocardiographic abnormality.Radar microwave radiation is to living to be made with personnel's physical and mental health
At serious harm.Therefore it is significant to carry out microwave radiation protecting investigation of materials.
Patent of invention CN104628326A uses the nano combined absorbing material of dielectric loss type, the nano combined suction of magnetic loss type
Wave material etc. is prepared for a kind of concrete with electromagenetic wave radiation safeguard function.Good wideband is shown in 2-18GHz
Absorbing property；And the electromagnetic radiation protective materiall as concrete, for the more demanding of structural mechanical property, consideration is more,
And it is primarily adapted for use in newly constructed house, and the radiation protection in old house is transformed, it is more difficult.Patent of invention CN103903665A
It is related to a kind of cement mortar wideband with metal mesh and shields/inhale wave composite construction function solenoid construction material, wave absorbing agent (graphite)
Incorporation be gradually increased from outer layer to internal layer, how to be realized in large-area construction, content is gradually increased from inside to outside, construction technology
Be difficult to ensure, to sum up, existing electromagnetic radiation technology studied in terms of protective benefits it is more, and be directed to operability, function and service
The comprehensive consideration of property and economy is inadequate.
Summary of the invention
The object of the present invention is to provide a kind of radar microwaves to radiate two-layer compound protective materials, and it is anti-to solve radar microwave radiation
The problem of operability present in shield, function and service, economy etc. need comprehensive consideration.
In order to achieve the above object, the present invention has following technical solution:
The invention discloses a kind of radar microwaves to radiate two-layer compound protective materials, including wave absorption magnetic conduction temperature-control coating and suction wave
Shielded layer, the corresponding material of the wave absorption magnetic conduction temperature-control coating are wave absorption magnetic conduction thermal control material, inhale the corresponding material of wave shielded layer and are
Wave shielding material is inhaled, the wave absorption magnetic conduction thermal control material and suction wave shielding material are all composite materials.
Wherein, wave absorption magnetic conduction thermal control material, using wave absorption agent, lightweight porous heat insulating material and the cement of uniform mixing.
Wherein, wave shielding material is inhaled, using the cement of uniform mixing, staple fiber, iron scale.
Preferably, lightweight porous heat insulating material selects glass bead, dry density 240-300kg/m3, thermal coefficient≤
0.07 W/mK, volume account for the 30-40% of gross mass.
Preferably, cement is all made of ordinary portland cement, label is not less than 42.5.
Preferably, iron scale is flakey thin slice, 30 mesh of size or so, Fe3O4Content not less than iron scale it is total
The 75% of amount.
Preferably, inhaling in wave shielding material also doped with cellulose, rubber powder and staple fiber, the content of cellulose accounts for material
The 0.4-0.5% of total amount, the content of rubber powder account for the 1-2% of total amount, and staple fiber accounts for the 0.2-0.3% of total amount；
Preferably, fiber length≤3mm, diameter≤18 μm, tensile strength 400-500MPa；
Preferably, staple length is 15-25mm, diameter≤16 μm, tensile strength 700-800MPa；
Preferably, rubber powder bulk density 800-950g/L, partial size is greater than 400 μm, pH value 6-8.
Preferably, the content of iron scale accounts for the 70-80% of gross mass.
Preferably, wave absorption magnetic conduction thermal control material is mixed with cellulose, staple fiber, rubber powder, specification and wave shielding material phase is inhaled
Together, the content of cellulose accounts for the 3-5% of total amount of material, and staple fiber accounts for the 2-3% of total amount, and the content of rubber powder accounts for the 1-2% of total amount.
Preferably, wave absorption agent mainly includes silicon carbide, graphite, the volume of acetylene carbon black powder, wave absorption agent accounts for total amount of material
4-5%；
Preferably, silicon carbide specific gravity is 3.2-3.25, microhardness 2840-3300kg/m3, volume accounts for wave absorption agent material
Expect the 20-30% of total amount；
Preferably, graphite is flakey, average grain diameter is 60~70 μm, and volume accounts for the 20- of wave absorption agent material total amount
30%；Acetylene carbon black powder particles diameter is 40~50nm, and volume accounts for the 15-25% of wave absorption agent material total amount；
Compared with prior art, beneficial achievement of the invention is:
Radar microwave proposed by the present invention radiates two-layer compound protective materials, in engineer application can according to cement mortar into
Row construction, easy to operate, feasibility is strong；Wave absorption magnetic conduction thermal control material provides the reflection of electromagnetic wave consumption field of porous closed cavity
Institute, the impedance matching of optimization make electromagnetic wave be easier to enter and consume, and inhale the safeguard structure of wave shielded layer densification and equally distributed
Fe3O4, can effectively consume electromagnetic wave；The comprehensive performances such as frost resistance, heat insulating ability, the fire line of material are prominent, while being preferably incorporated into function
Energy material, material price economy, application effect is obvious, and promotion prospect is wide, can be used for radar station microwave radiation protecting and place
Satellite Communication Transmit base station etc. needs the key area of microwave radiation protecting.
Detailed description of the invention
Fig. 1 is that radar microwave of the present invention radiates two-layer compound protective materials schematic diagram.
Fig. 2 is that radar microwave of the present invention radiates double-layer composite material reflectance test figure.
Appended drawing reference: 1, wave shielded layer is inhaled；2, wave absorption magnetic conduction temperature-control coating.
Specific embodiment
Referring to Fig. 1, the present invention is a kind of radar microwave radiation two-layer compound protective materials, including wave absorption magnetic conduction temperature-control coating 2
With suction wave shielded layer 1, the corresponding material of the wave absorption magnetic conduction temperature-control coating 2 is wave absorption magnetic conduction thermal control material, and it is corresponding to inhale wave shielded layer 1
Material be inhale wave shielding material, the wave absorption magnetic conduction thermal control material and inhale wave shielding material be all composite material.
When implementation, according to the putting in order from the near to the remote from radiation source are as follows: wave absorption magnetic conduction temperature-control coating 2 inhales wave shielded layer 1.
Wave absorption magnetic conduction thermal control material, using wave absorption agent, lightweight porous heat insulating material and the cement of uniform mixing, the lightweight
Porous insulation material selects glass bead, dry density 240-300kg/m3, thermal coefficient≤0.07W/mK, the total matter of volume Zhan
The 30-40% of amount, the cement are all made of ordinary portland cement, and label is not less than 42.5, the wave absorption magnetic conduction thermal control material
Mixed with cellulose, staple fiber, rubber powder, wherein fiber length≤3mm, diameter≤18 μm, tensile strength 400-500MPa are fine
The content of dimension element accounts for the 3-5% of total amount of material, wherein staple length 15-25mm, diameter≤16 μm, tensile strength 700-
800MPa, staple fiber account for the 2-3% of total amount, wherein rubber powder bulk density 800-950g/L, partial size are greater than 400 μm, and pH value is
6-8, the content of rubber powder account for the 1-2% of total amount, and the wave absorption agent mainly includes silicon carbide, graphite, acetylene carbon black powder, wave absorption agent
Volume accounts for the 4-5% of total amount of material, wherein silicon carbide specific gravity is 3.2-3.25, and microhardness is 2840-3300 kg/m3, mix
Amount accounts for the 20-30% of wave absorption agent material total amount, wherein graphite is flakey, and average grain diameter is 60~70 μm, and volume accounts for wave absorption agent
The 20-30% of total amount of material, wherein acetylene carbon black powder particles diameter is 40~50nm, and volume accounts for the 15- of wave absorption agent material total amount
25%.
Wave shielding material is inhaled, using the cement of uniform mixing, staple fiber, iron scale, the cement is all made of ordinary silicon
Acid salt cement, label are not less than 42.5, and the iron scale is flakey thin slice, 30 mesh of size or so, Fe3O4Content it is not small
In the 75% of iron scale total amount, the content of iron scale accounts for the 70-80% of gross mass, also adulterates in the suction wave shielding material
There are cellulose, rubber powder and staple fiber, wherein fiber length≤3mm, diameter≤18 μm, tensile strength 400-500MPa, fiber
The content of element accounts for the 0.4-0.5% of total amount of material, wherein rubber powder bulk density 800-950g/L, partial size are greater than 400 μm, PH value
Content for 6-8, rubber powder accounts for the 1-2% of total amount, wherein staple length 15-25mm, diameter≤16 μm, tensile strength
700-800MPa, staple fiber account for the 0.2-0.3% of total amount.
Present invention is further described in detail combined with specific embodiments below, but not as a limitation of the invention.It is real
Applying the special characteristic, structure or feature in example can be combined by any suitable form.
Unless otherwise specified, the percentage composition in the embodiment of the present invention is mass percentage.
Referring to Fig. 1, according to GJB 2038A-2011 " radar absorbing reflectivity test method ", using arch frame method come
Test material reflectivity, process are as follows:
Wave absorption magnetic conduction thermal control material prepare: cement, cellulose, staple fiber, rubber powder, wave absorption agent, glass bead mass ratio
Are as follows: 1:0.004:0.002:0.003:0.005:0.51, the ratio of mud are as follows: 0.8；
Inhale wave shielding material prepare: cement, rubber powder, cellulose, staple fiber, iron scale mass ratio be 1:0.07:
0.02:0.01:3.4, the ratio of mud 0.24；
Cellulose≤2.8mm, diameter≤16 μm, tensile strength 450MPa；Staple length is 18-20mm, diameter≤15 μ
M, tensile strength 760MPa；Rubber powder bulk density 820-900g/L, partial size are greater than 450 μm, pH value 6-8；Silicon carbide specific gravity is
3.22-3.24 microhardness 2900-3100kg/m3；Flaky graphite, average grain diameter are 67 μm；Acetylene carbon black powder, particle
Diameter is 45~48nm.
Inhale wave shielded layer 1 with a thickness of 12mm, wave absorption magnetic conduction temperature-control coating 2 with a thickness of 40mm.
Test the reflectivity of the double-layer composite material in 1.5-40GHz frequency range referring to fig. 2.
In addition to 1.65~2.65GHz, the band limits reflectivity of nearly 38GHz is lower than -10dB, and overall reflectivity is in -
5dB is hereinafter, show that inhaling wave shielding material and wave absorption magnetic conduction thermal control material combines the microwave radiation protecting material to be formed, in wideband
The effectiveness of section is outstanding, has good safeguard function for radar microwave radiation.
Wave shielding material and the performance test of wave absorption magnetic conduction thermal control material are inhaled according in GB-T25181-2010 " premixing mortar "
The common dry-mixed plastering mortar testing standard of equal strength grade M7.5.Detailed performance is as shown in table 1:
1 double-layer composite material basic performance of table tests table
As seen from the above embodiment, radar microwave proposed by the present invention radiates double-layer composite material, multiple by layer functions
It closes, the operability of protection, functionality, economy etc. comprehensive consideration, can effectively be shielded by multiple incident, reflection, consumption
Great microwave radiation is covered, material is provided simultaneously with the performances such as freeze proof, fire prevention, heat preservation, since selection is reasonable, materials are convenient, economical high
Effect, is tested, shield effectiveness is excellent, can provide strong technical support for radar station microwave radiation protecting by example.It promotes and applies
It has a extensive future.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of radar microwave radiates two-layer compound protective materials, it is characterised in that: including wave absorption magnetic conduction temperature-control coating and inhale wave screen
Cover layer, the corresponding material of the wave absorption magnetic conduction temperature-control coating is wave absorption magnetic conduction thermal control material, and inhaling the corresponding material of wave shielded layer is to inhale
Wave shielding material, the wave absorption magnetic conduction thermal control material and suction wave shielding material are all composite materials.
2. a kind of radar microwave as described in claim 1 radiates two-layer compound protective materials, it is characterised in that: the wave absorption is led
Magnetic thermal control material, using wave absorption agent, lightweight porous heat insulating material and the cement of uniform mixing.
3. a kind of radar microwave as described in claim 1 radiates two-layer compound protective materials, it is characterised in that: the suction wave screen
Material is covered, using the cement of uniform mixing, staple fiber and iron scale, wherein the content of iron scale accounts for the 70- of gross mass
80%。
4. a kind of radar microwave as claimed in claim 2 radiates two-layer compound protective materials, it is characterised in that: the lightweight is more
Hole thermal insulation material selects glass bead, and dry density is 240-300 kg/m3, thermal coefficient≤0.07 W/mK, the total matter of volume Zhan
The 30-40% of amount.
5. special such as claim 2 and a kind of described in any item radar microwave radiation two-layer compound protective materials of claim 3
Sign is: the cement is all made of ordinary portland cement, and label is not less than 42.5.
6. a kind of radar microwave as claimed in claim 3 radiates two-layer compound protective materials, it is characterised in that: the iron oxide
Skin is flakey thin slice, 30 mesh of size or so, Fe3O4Content be not less than iron scale total amount 75%.
7. a kind of radar microwave as claimed in claim 3 radiates two-layer compound protective materials, it is characterised in that: the suction wave screen
It covers also doped with cellulose, rubber powder and staple fiber in material, the content of cellulose accounts for the 0.4-0.5% of total amount of material, and rubber powder contains
Amount accounts for the 1-2% of total amount, and staple fiber accounts for the 0.2-0.3% of total amount；
Fiber length≤the 3mm, diameter≤18 μm, tensile strength 400-500MPa；
The staple length is 15-25mm, diameter≤16 μm, tensile strength 700-800MPa；
The rubber powder bulk density 800-950g/L, partial size are greater than 400 μm, pH value 6-8.
8. a kind of radar microwave as claimed in claim 2 radiates two-layer compound protective materials, it is characterised in that: the wave absorption is led
Magnetic thermal control material is mixed with cellulose, staple fiber, rubber powder, and specification is identical as wave shielding material is inhaled, and it is total that the content of cellulose accounts for material
The 3-5% of amount, the content of staple fiber account for the 2-3% of total amount, and the content of rubber powder accounts for the 1-2% of total amount.
9. a kind of radar microwave as claimed in claim 2 radiates two-layer compound protective materials, it is characterised in that: the wave absorption agent
It include mainly silicon carbide, graphite, the volume of acetylene carbon black powder, wave absorption agent accounts for the 4-5% of total amount of material, wherein silicon carbide specific gravity is
3.2-3.25, microhardness are 2840-3300 kg/m3, and volume accounts for the 20-30% of wave absorption agent material total amount, wherein graphite is squama
Sheet, average grain diameter are 60~70 μm, and volume accounts for the 20-30% of wave absorption agent material total amount, wherein acetylene carbon black powder particles diameter
For 40~50nm, volume accounts for the 15-25% of wave absorption agent material total amount.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110272243A (en) * | 2019-06-21 | 2019-09-24 | 中国人民解放***箭军工程大学 | A kind of double-layer cement base wave-absorbing material and preparation method thereof |
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| EP0689262B1 (en) * | 1994-06-23 | 1999-12-01 | Takenaka Corporation | Wave absorber composition, radio wave absorber member, radio wave absorber and method for producing wave absorber member |
| CN102718451A (en) * | 2012-06-27 | 2012-10-10 | 重庆大学 | Carbon-based composite building wave absorption and heat preservation material and preparation method thereof |
| CN105275106A (en) * | 2015-11-05 | 2016-01-27 | 中国建筑材料科学研究总院 | Anti-electromagnetic radiation building |
| CN105523741A (en) * | 2015-12-28 | 2016-04-27 | 中国建筑材料科学研究总院 | Constructional electromagnetic radiation shielding cement-based plate and production method thereof |
| CN106380139A (en) * | 2016-08-28 | 2017-02-08 | 长屏(北京)电磁防护技术有限公司 | Radar wave protection cement mortar |
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2019
- 2019-02-26 CN CN201910142559.0A patent/CN109912273A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0689262B1 (en) * | 1994-06-23 | 1999-12-01 | Takenaka Corporation | Wave absorber composition, radio wave absorber member, radio wave absorber and method for producing wave absorber member |
| CN102718451A (en) * | 2012-06-27 | 2012-10-10 | 重庆大学 | Carbon-based composite building wave absorption and heat preservation material and preparation method thereof |
| CN105275106A (en) * | 2015-11-05 | 2016-01-27 | 中国建筑材料科学研究总院 | Anti-electromagnetic radiation building |
| CN105523741A (en) * | 2015-12-28 | 2016-04-27 | 中国建筑材料科学研究总院 | Constructional electromagnetic radiation shielding cement-based plate and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110272243A (en) * | 2019-06-21 | 2019-09-24 | 中国人民解放***箭军工程大学 | A kind of double-layer cement base wave-absorbing material and preparation method thereof |
| CN110272243B (en) * | 2019-06-21 | 2021-11-05 | 中国人民解放***箭军工程大学 | Double-layer cement-based wave-absorbing material and preparation method thereof |
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