A kind of coated wave-absorbing material prepared by nano-graphite powder and its preparation method
A technology of nano-graphite powder and wave-absorbing materials, which is applied in the field of wave-absorbing materials, can solve problems such as incapable of industrialized preparation, high cost, and complicated preparation process, and achieve the effects of light weight, strong wave-absorbing performance, and improved wave-absorbing performance
Active Publication Date: 2017-09-19
HEFEI SIRUI NEW MATERIAL TECH CO LTD
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Problems solved by technology
It can be seen from the report that the absorbing agents prepared by adopting nano-carbon materials and their composite materials all show good absorbing properties, but the disadvantages are that the preparation process of these nano-carbon materials is complex (nano-carbon fibers), and the cost is high (graphene and nano-carbon tube), even currently unable to be produced industrially
However, there is no report on the use of nano-graphite powder as a wave absorbing agent.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] Mix the dried nano-graphite powder (particle size is 100nm) with polypropylene, wherein the weight percentage of nano-graphite powder is 1%, and the weight percentage of polypropylene is 99%. A thin slice of 20cm×20cm×2mm was prepared by this method. The maximum reflectance of this sheet test is -3dB (see figure 1 ).
Embodiment 2
[0030] Mix the dried nano-graphite powder (particle size is 100nm) with epoxy resin, wherein the nano-graphite powder weight percentage is 5%, and the epoxy resin weight percentage is 95%, after uniformly mixing by mixer, use A thin slice of 20cm×20cm×2mm was prepared by brushing. This sheet has a peak at 16.16GHz, the reflectivity is -11.92dB, and the absorbing bandwidth less than -10dB is 4.1GHz (see figure 2 ).
Embodiment 3
[0032] The nano-graphite powder (particle size is 200nm) after the drying process is mixed with epoxy resin, wherein the nano-graphite powder weight percentage is 15%, and the epoxy resin weight percentage is 85%. A thin slice of 20cm×20cm×2mm was prepared by brushing. This sheet has a peak at 12.64GHz, the reflectivity is -15dB, and the absorbing bandwidth less than -10dB is 3.8GHz (see image 3 ).
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Abstract
The invention discloses a coated wave-absorbing material prepared from nano-graphite powder and a preparation method thereof. The material is composed of wave absorbing agent and binder. The wave absorbing agent refers to nano-graphite powder, and the weight percentage is 1% to 75%. The binder refers to at least one of resin, rubber and plastic. , and the weight percent content is 25% to 99%. The invention has the following advantages: firstly, the nano-graphite powder has a small specific gravity, and its tap density is 0.6-1.0 g / cm3; secondly, it has good corrosion resistance, and the nano-graphite powder can resist the corrosion of seawater and various acid-base media. The small size effect, surface effect and quantum size effect of nano-graphite powder make it have excellent microwave absorption performance. By adjusting the particle size, proportioning concentration and coating thickness of the absorbing agent, absorbing coatings in different wave bands can be obtained; the absorbing material is light in weight, thin in coating, good in dispersion performance, strong in absorbing performance, and stable and controllable in quality , the preparation process is simple and easy, and can meet different stealth requirements.
Description
technical field [0001] The invention relates to a method for preparing a wave-absorbing material composed of wave-absorbing agent nano-graphite powder and a binder, and belongs to the technical field of wave-absorbing materials. Background technique [0002] With the rapid development of electronic technology, various weapon systems on the future battlefield are facing severe threats. Stealth technology, as one of the five elements of land, sea, air, space and electromagnetic, is an important way to improve the survival and penetration of weapon systems. It is also an effective means to improve the overall combat effectiveness, and is highly valued by the world's military powers. The high-speed development of stealth technology is called one of the three major achievements of military science (plus laser weapons and cruise missiles). As the most important part of stealth technology, the research and application of new stealth materials is an important foundation and key to ...
Claims
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Patent Timeline
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IPC IPC(8): C08L63/00C08L61/06C08L33/00C08L9/06C08L23/22C08L23/16C08L23/06C08L23/12C08L75/04C08K3/04C09K3/00
Inventor姜涌
OwnerHEFEI SIRUI NEW MATERIAL TECH CO LTD