Coated wave-absorbing material prepared from nano-graphite powder and preparation method of coated wave-absorbing material

A technology of nano-graphite powder and wave-absorbing materials, which is applied in the field of wave-absorbing materials, can solve the problems of complex preparation process, incapable of industrialized preparation, and high cost, and achieve the effects of improved wave-absorbing performance, light weight, and strong wave-absorbing performance

Active Publication Date: 2015-08-19
HEFEI SIRUI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Coated wave-absorbing material prepared from nano-graphite powder and preparation method of coated wave-absorbing material
  • Coated wave-absorbing material prepared from nano-graphite powder and preparation method of coated wave-absorbing material
  • Coated wave-absorbing material prepared from nano-graphite powder and preparation method of coated wave-absorbing material

Examples

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 of the coated wave-absorbing material. The material comprises a wave absorber and an adhesive, the wave absorber refers to the nano-graphite powder with the weight percent of 1%-75%, the adhesive refers to at least one of resin, rubber and plastics, and the weight percent of the adhesive is 25%-99%. The coated wave-absorbing material has the advantages that the nano-graphite powder is small in specific gravity, the tap density of the nano-graphite powder is 0.6-1.0g/cm<3>, the nano-graphite powder is fine in corrosion resistance, can resist corrosion of seawater and various acid-alkali media and has excellent wave-absorbing performance by the aid of small-size effect, surface effect and quantum size effect, wave-absorbing materials at different wavebands can be obtained by adjusting the granularity, the mixing concentration and the coating thickness of the wave absorber, and the wave-absorbing material is light in weight, thin in coating, fine in dispersing performance, strong in wave-absorbing performance, stable and controllable in quality, simple and easy in preparation process and can meet different invisible 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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L61/06C08L33/00C08L9/06C08L23/22C08L23/16C08L23/06C08L23/12C08L75/04C08K3/04C09K3/00
Inventor 姜涌
Owner HEFEI SIRUI NEW MATERIAL TECH CO LTD
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