CN1470581A - High-absorption light-type electromagnetic-absorbing coating - Google Patents
High-absorption light-type electromagnetic-absorbing coating Download PDFInfo
- Publication number
- CN1470581A CN1470581A CNA031270727A CN03127072A CN1470581A CN 1470581 A CN1470581 A CN 1470581A CN A031270727 A CNA031270727 A CN A031270727A CN 03127072 A CN03127072 A CN 03127072A CN 1470581 A CN1470581 A CN 1470581A
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- electromagnetic wave
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- absorption light
- carbon fiber
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention relates to a high absorption light type electromagnetic wave absorbing coating. it is characterized by that said invention is a coating type thin sheet shaped electromagnetic wave obsorbing body made up by using epoxy resin 100 phr, carbon micropowder 1 phr and carbon fibre 25-35 phr, the length of said carbon fibre is less than 5 mm, through the processes of uniformly mixing them, applying it and making it into a coating layer whose thicknes if 0.5-0.8 mm and drying for 8 hr at normal temp. Said invention has the extensive application range.
Description
Technical field
The invention belongs to a kind of electromagnetic wave absorbent material.
Background technology
Be accompanied by the develop rapidly of information society, electronic product is popularized day by day.Electronic product has also brought certain harm bring the huge while easily to people.Especially, the widespread use of the e-machine of built-in signal conditioning package, the arithmetic speed of CPU is high speed more and more, and consequent high-frequency electromagnetic wave excitation and noise pollution are also more and more serious.The signal of communication, computer and various electronic systems that the electromagnetic environment that worsens not only relies on day by day to the human lives is propagated and is exerted an influence, and causes the system and device flase operation, brings unpredictable disaster, and can bring threat to human body health.Given this, WHO has classified electromagnetic pollution as second largest environmental pollution.For purifying electromagnetic environment, guarantee the safe operation of each class of electronic devices and machine, prevent hazards of electromagnetic radiation, protection people physical and mental health, the hazards of electromagnetic radiation protection has become a very urgent and important task.In addition, militarily, electronic system is anti-electromagnetic interference how, and how military target hides enemy's electronic reconnaissance, and it is stealthy to implement target, ensures that conscientiously action safety has also become a problem that presses for solution.
In order to address the above problem, people on the basis of shielding material, begin to explore the development of electromagnetic wave absorbent material from the sixties.Developed country is on the forefront in this respect, the surface of U.S.'s stealth fighter F-117 is exactly to adopt stealth material and stealthy design as the well-known, Japan is extensively civilian with electromagnetic wave absorbent material especially, except that electronic applications, also be used for the electromagnet radiation protection in office, watch-keeping cubicle etc., even high-lager building and bridge surface, in order to eliminate the false shadow of radar.
The kind of electromagnetic wave absorbent material has a lot, as sintered iron oxygen iron plate, and wedge-like cartridge, sponge formula cartridge, coating type electromagnetic wave absorbent material etc.Since the eighties, be accompanied by the miniaturization of electronic product and the high speed of CPU arithmetic speed, leakage of electronic system hertzian wave and anti-interference problem are more and more serious, cause people's great attention.Soft type sheet-like electromagnetic wave absorbent begins to be dropped into the huge fund development.In the 1-18GHz different center frequency absorbed dose of 20dB is arranged as japanese product DPR, product thickness is less than 2mm.
At present external product mainly adopts the bigger magneticsubstance of resin and proportion, carbonyl iron dust etc. to produce the coating type electromagnetic wave absorbent material, and product is than great, the cost height.
Summary of the invention
The invention provides a kind of high-absorption light electromagnetic wave absorption coating, to solve external product than great, the problem that cost is high.The technical scheme that the present invention takes is: with Resins, epoxy 100phr, micropowder 1phr, and carbon fiber 25-35phr, the length of this carbon fiber is less than 5mm, uniform mixing, paint the coating of thick 0.5～0.8mm, dry 8hr under the normal temperature prepares the coating type sheet-like electromagnetic wave absorbent.
We select the little radio-radar absorber of proportion, and as micropowder, carbon fiber carries out compound, successfully prepare new coating type electromagnetic wave absorbent material, and absorptive character are identical with external product, but lighter, and cost is lower.Make production more convenient, faster, have more practicality.This also is the novelty place of this project.The key technical indexes contrasts with external product:
At 26--40GHz, different center frequency-band absorption of electromagnetic wave reach more than the 20dB, and thickness is less than 1mm, and proportion is less than 1.3g/cm
3And has a good weathering resistance.Know-why according to this can be prepared the electromagnetic-absorbing coating of 5-110GHz different-waveband.
International advanced Japanese like product index: at 26--40GHz, different center frequency-band absorption of electromagnetic wave reach 15--25dB, and thickness is less than 1mm, proportion 3g/cm
3About.
Novel material is compared with external product, and absorptive character are identical with external product, but lighter, and cost is lower.
Can be widely used in communication, electronic system on this product is civilian, radar wave transmits and receives anti-electromagnetic radiation interference and the information leakage and the electromagnetic pollution protection etc. of applying units such as device and e-machine inside.More can be widely used in military affairs, as radar wave detection protection, armored combat vehicle, the inside and the surfacecti proteon of mobile commanding system, surface ship, aircraft etc., various camouflages, tent.
Embodiment
Embodiment 1.
With Resins, epoxy 100Phr, micropowder 1Phr, carbon fiber 35phr, the length of this carbon fiber is 3mm, and uniform mixing is painted the coating of thick 0.5mm, and dry 8hr under the normal temperature prepares the coating type sheet-like electromagnetic wave absorbent.Reach 20dB in the 39GHz absorption of electromagnetic wave, material proportion is 1.3g/cm
3
Embodiment 2.
With Resins, epoxy 100phr, micropowder 1phr, carbon fiber 27phr, the length of this carbon fiber is 0.5mm, and uniform mixing is painted the coating of thick 0.8mm, and dry 8hr under the normal temperature prepares the coating type sheet-like electromagnetic wave absorbent.Reach 21dB in the 27GHz absorption of electromagnetic wave, material proportion is 1.3g/cm
3
Embodiment 3.
With Resins, epoxy 100phr, micropowder 1phr, carbon fiber 30phr, the length of this carbon fiber is 5mm, and uniform mixing is painted the coating of thick 0.6mm, and dry 8hr under the normal temperature prepares the coating type sheet-like electromagnetic wave absorbent.Prepare soft type sheet-like electromagnetic wave absorbent and reach 22dB in the 33GHz absorption of electromagnetic wave, material proportion is 1.3g/cm
3
Claims (1)
1, a kind of high-absorption light electromagnetic wave absorption coating, it is characterized in that: with Resins, epoxy 100phr, micropowder 1phr, carbon fiber 25-35phr, this carbon fiber length is less than 5mm, uniform mixing, paint the coating of thick 0.5～0.8mm, dry 8hr under the normal temperature prepares the coating type sheet-like electromagnetic wave absorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031270727A CN1470581A (en) | 2003-06-13 | 2003-06-13 | High-absorption light-type electromagnetic-absorbing coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031270727A CN1470581A (en) | 2003-06-13 | 2003-06-13 | High-absorption light-type electromagnetic-absorbing coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1470581A true CN1470581A (en) | 2004-01-28 |
Family
ID=34153181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031270727A Pending CN1470581A (en) | 2003-06-13 | 2003-06-13 | High-absorption light-type electromagnetic-absorbing coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1470581A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257786B (en) * | 2008-04-09 | 2010-06-02 | 海南大学 | Double-frequency compatibility soft type sheet-like electromagnetic wave absorbent |
| CN104031519A (en) * | 2014-05-12 | 2014-09-10 | 铜陵市超远精密电子科技有限公司 | Electromagnetic-interference-preventing three-proofing lacquer for printed-circuit boards |
| CN104789095A (en) * | 2015-04-28 | 2015-07-22 | 江苏理工学院 | Spiral carbon fiber water-based anticorrosive stealth coating and preparation method thereof |
| US9704613B2 (en) | 2013-02-21 | 2017-07-11 | 3M Innovative Properties Company | Polymer composites with electromagnetic interference mitigation properties |
| US9806426B2 (en) | 2009-03-27 | 2017-10-31 | Qinetiq Limited | Electromagnetic field absorbing composition |
-
2003
- 2003-06-13 CN CNA031270727A patent/CN1470581A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257786B (en) * | 2008-04-09 | 2010-06-02 | 海南大学 | Double-frequency compatibility soft type sheet-like electromagnetic wave absorbent |
| US9806426B2 (en) | 2009-03-27 | 2017-10-31 | Qinetiq Limited | Electromagnetic field absorbing composition |
| US9704613B2 (en) | 2013-02-21 | 2017-07-11 | 3M Innovative Properties Company | Polymer composites with electromagnetic interference mitigation properties |
| US10340054B2 (en) | 2013-02-21 | 2019-07-02 | 3M Innovative Properties Company | Polymer composites with electromagnetic interference mitigation properties |
| CN104031519A (en) * | 2014-05-12 | 2014-09-10 | 铜陵市超远精密电子科技有限公司 | Electromagnetic-interference-preventing three-proofing lacquer for printed-circuit boards |
| CN104789095A (en) * | 2015-04-28 | 2015-07-22 | 江苏理工学院 | Spiral carbon fiber water-based anticorrosive stealth coating and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |