Carbon-nano-tube composite microwave absorbing material and preparation method thereof

A carbon nanotube composite and wave-absorbing material technology, which is applied in the direction of carbon compounds, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low purity, poor wave-absorbing performance, and stable environment Poor performance and other problems, to achieve the effect of high purity, light weight, and improved wave-absorbing performance

Active Publication Date: 2017-08-11
EAGLES MEN AERONAUTIC SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon nanotubes prepared in the prior art still have defects such as low purity, poor environmental stability, and poor wave-absorbing performance.

Method used

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  • Carbon-nano-tube composite microwave absorbing material and preparation method thereof
  • Carbon-nano-tube composite microwave absorbing material and preparation method thereof
  • Carbon-nano-tube composite microwave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 , figure 2 and Figure 4 As shown, a carbon nanotube composite wave-absorbing material, the material is a precursor solution 1 prepared by dissolving a catalyst in a liquid carbon source containing additives, and then made by a pressureless sintering method with carbon nanotubes as a matrix 1. Add iron particles and cobalt-nickel alloy particles to the inner wall of the carbon nanotubes, and a composite wave-absorbing material with rare earth compounds attached to the outer wall; the liquid carbon source is 1,2-dichloroethane solution, and the additive is Lanthanum nitrate, ethanol that promotes the dissolution of lanthanum nitrate is also added in the liquid carbon source; the volume ratio of the 1,2-dichloroethane solution to ethanol is 9:1, and the catalyst contains: 33.93wt% dichloromethane Iron, 33.19 wt% cobaltocene and 32.88 wt% nickelocene.

[0035] The rare earth compound is LaOCl (lanthanum oxychloride).

[0036] The component ratio of th...

Embodiment 2

[0049] Such as figure 1 , image 3 and Figure 5 As shown, in this embodiment, the step (1) of the preparation method of the carbon nanotube composite wave-absorbing material is: dissolving 0.82g ferrocene, 0.80g ferrocene cobalt, and 0.78g ferrocene in 54ml of 1,2-dichloroethane and 6ml of ethanol in the mixed solution, mix well and then add 0.24g lanthanum nitrate to the mixed solution, after ultrasonic vibration evenly, make the precursor solution 1;

[0050] Other than that, other contents are the same as those in Embodiment 1.

Embodiment 3

[0052] In this embodiment, in the step (3) of the preparation method of the carbon nanotube composite wave-absorbing material, the temperature of the preheating zone 4 is kept at 220° C., and the reaction zone of the tube furnace 5 is heated so that The reaction zone temperature was maintained at 750°C.

[0053] Other than that, other contents are the same as those in Embodiment 1.

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Abstract

The invention belongs to the technical field of microwave absorbing materials, and relates to a carbon-nano-tube composite microwave absorbing material and a preparation method thereof. According to the material, a catalyst is dissolved in a liquid carbon source containing an additive to prepare a precursor solution, then, a pressureless sintering method is adopted to prepare the composite microwave absorbing material of which matrixes are carbon nano tubes, iron particles and cobalt-nickel alloy particles are added in the inner walls of the carbon nano tubes, and rare-earth compounds are attached to the outer walls of the carbon nano tubes; the liquid carbon source is a 1,2-dichloroethane solution, the additive is lanthanum nitrate, and ethyl alcohol which promotes the dissolution of lanthanum nitrate is further added in the liquid carbon source; the volume ratio of the 1,2-dichloroethane solution to ethyl alcohol is 9:1, and the catalyst contains 33.93 wt.% of ferrocene, 33.19 wt.% of cobaltocene and 32.88 wt.% of nickelocene. The carbon-nano-tube composite microwave absorbing material has the advantages of being light in weight, wide in absorption frequency band, extremely improved in microwave absorbing performance, high in environmental corrosion resistance and wide in application range; carbon-nano-tube filler prepared by the preparation method is high in purity and few in impurity.

Description

technical field [0001] The invention belongs to the technical field of microwave absorbing materials, and in particular relates to a carbon nanotube composite wave absorbing material and a preparation method thereof. Background technique [0002] Among the traditional electromagnetic wave absorbing materials, ferrite and carbonyl iron powder are the most widely used. Although they have the advantages of strong wave absorption performance and wide absorption frequency band, their defects of high density and heavy quality limit their application in stealth aircraft. , Application on weapons and equipment. As a typical nanomaterial, carbon nanotubes not only have good electromagnetic wave absorption properties, but also have the advantages of low density, light weight, and high stability. Combining carbon nanotubes with traditional wave-absorbing materials to prepare new carbon nanotube composite materials is of great significance to the development of national defense and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/162B01J31/22H05K9/00
CPCB01J31/2295B01J35/0006B01J2531/0225B01J2531/842B01J2531/845B01J2531/847C01P2004/04H05K9/0081
Inventor 高志猛冯健杰刘敏章欣
Owner EAGLES MEN AERONAUTIC SCI & TECH GRP
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