a bcn/fe x o y @c f Preparation technology of /c composite structure absorbing material

A wave-absorbing material and composite structure technology, applied in shielding materials, magnetic field/electric field shielding, electrical components, etc., can solve the problems of difficult densification, poor high temperature oxidation resistance, etc., and achieve excellent dielectric properties and dielectric properties. Adjustability, low density and high temperature stability, and the effect of improving low-frequency absorbing performance

Active Publication Date: 2022-07-15
HARBIN INST OF TECH AT WEIHAI +1
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  • Abstract
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Problems solved by technology

C f Although / C composites have excellent high-temperature performance and mechanical properties, they have poor high-temperature oxidation resistance and are difficult to densify.

Method used

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  • a bcn/fe <sub>x</sub> o <sub>y</sub> @c <sub>f</sub> Preparation technology of /c composite structure absorbing material
  • a bcn/fe <sub>x</sub> o <sub>y</sub> @c <sub>f</sub> Preparation technology of /c composite structure absorbing material
  • a bcn/fe <sub>x</sub> o <sub>y</sub> @c <sub>f</sub> Preparation technology of /c composite structure absorbing material

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Embodiment Construction

[0027] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, ...

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Abstract

The present invention relates to a kind of BCN / Fe x O y @C f The preparation process of the / C composite structure wave absorbing material includes the following steps: f The fibers are dipped in ferric nitrate solution to complete the first dipping operation and dried; continue dipping in a mixed solution of boric acid, urea and melamine, and then dried to obtain BCN / Fe x O y @C f Preform; using a vacuum impregnation machine, BCN / Fe was treated with an organic solvent mixed with graphene, pitch, and n-hexane. x O y @C f The preform is vacuum impregnated, and the impregnated sample is obtained by vacuuming; the impregnated sample is cured to obtain a cured sample; the cured sample is cracked to obtain a wave absorbing material; the vacuum impregnation, curing and Cracking until the weight gain of the absorbing material is less than 1% to obtain the BCN / Fe x O y @C f / C composite structure absorbing material product has the integrated performance of high temperature absorbing and mechanical bearing, and has excellent thinning performance and mechanical performance.

Description

technical field [0001] The present invention relates to a kind of BCN / Fe x O y @C f The preparation process of the / C composite structure absorbing material belongs to the technical field of electromagnetic absorbing materials. Background technique [0002] In recent years, with the development of the 5th Generation Mobile Communication Technology (5G for short), the realization of high-speed and low-latency communication is the network infrastructure for realizing the interconnection of human, machine and things. However, electromagnetic waves have a great impact on human beings, equipment, and the environment. Therefore, in the preparation process of materials, we should not only consider the structural bearing function, but also take into account the wave absorbing performance. [0003] C f The / C composite material is based on carbon fiber as the reinforcement and carbon or graphite as the matrix, which can withstand extremely high temperatures and heating rates, so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/52C04B35/622C04B35/63H05K9/00
CPCC04B35/80C04B35/52C04B35/622C04B35/6303H05K9/009C04B2235/3272C04B2235/3856C04B2235/5248C04B2235/48C04B2235/422C04B2235/602C04B2235/656C04B2235/6581C04B2235/96
Inventor 张涛赵伟柳潜力王坤李晋宇郝桓民范丽君孙永涛王毅楠
Owner HARBIN INST OF TECH AT WEIHAI
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