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Graphene composite nano-Fe3O4 radar wave absorption material and preparation method thereof

A technology of graphene composite and absorbing materials, which is applied in the field of graphene composite nano Fe3O4 radar wave absorbing materials and graphene composite nano Fe3O4 radar wave absorbing materials, which can solve the problems of microwave absorption performance, wide application, high conductivity and electromagnetic The parameters cannot meet the impedance matching and other problems, and it is suitable for large-scale mass production, the preparation method is simple and easy to operate, and the effect of low density

Active Publication Date: 2019-04-16
深圳市克得磁材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high conductivity and electromagnetic parameters of pure RGO cannot meet the requirements of impedance matching, therefore, its microwave absorption performance is not enough for a wide range of applications

Method used

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  • Graphene composite nano-Fe3O4 radar wave absorption material and preparation method thereof
  • Graphene composite nano-Fe3O4 radar wave absorption material and preparation method thereof
  • Graphene composite nano-Fe3O4 radar wave absorption material and preparation method thereof

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preparation example Construction

[0040] The present invention proposes a graphene composite nano-Fe 3 o 4 The preparation method of the radar wave absorbing material. The preparation method comprises the following steps:

[0041] dissolving the ferrous salt and the ferric salt in water, and stirring to obtain an iron salt solution;

[0042] Dispersing the reduced graphene oxide solution in an organic alcohol solvent, stirring to obtain a dispersion;

[0043] mixing the iron salt solution and the dispersion, and adding a precipitating agent to obtain a mixed solution;

[0044] The mixed solution is moved into a reaction kettle, and heated to obtain a reaction product;

[0045] The obtained reaction product is separated, washed and dried to obtain graphene composite nano-Fe 3 o 4 ;

[0046] The graphene composite nano-Fe 3 o 4 Grinding and filling into the matrix to obtain the graphene composite nano-Fe 3 o 4 Radar absorbing material.

[0047] Specifically, first, a certain amount of ferrous salt and ...

Embodiment 1

[0071] First, weigh 9.73g FeCl 3 ·6H 2 O and 5.56 g FeSO 4 ·7H 2 O was dissolved in 10mL of ultrapure water, then 4.8g of urea was added, and stirred to obtain a uniform solution. Take 16mL of RGO solution with a concentration of 4mg / mL and disperse it in a mixed solution of 23mL of ethylene glycol and 1mL of polyethylene glycol-400, stir and ultrasonically obtain the dispersion for 20min and pour it into the homogeneous solution obtained above, and mix and stir for a certain time. After a period of time, it was slowly transferred to a 100mL polytetrafluoroethylene-lined stainless steel autoclave, placed in a constant temperature drying oven, heated and reacted at 160°C for 5h, and then naturally cooled to room temperature after taking out the autoclave. The reaction product obtained after the reaction is a black solution, which is magnetically separated and washed 3-4 times with a mixture of ethanol and ultrapure water at a volume ratio of 1:1, and then placed in a vacuum ...

Embodiment 2

[0073] First, weigh 9.73g FeCl 3 ·6H 2 O and 5.56 g FeSO 4 ·7H 2 O was dissolved in 10mL of ultrapure water, then 4.8g of urea was added, and stirred to obtain a uniform solution. Take 16mL of RGO solution with a concentration of 34mg / mL and disperse it in a mixed solution of 23mL of ethylene glycol and 1mL of polyethylene glycol-400, stir and ultrasonically obtain the dispersion for 20min and pour it into the homogeneous solution obtained above, mix and stir for a certain time. After a period of time, it was slowly transferred to a 100mL polytetrafluoroethylene-lined stainless steel autoclave, placed in a constant temperature drying oven, heated and reacted at 160°C for 5h, and then naturally cooled to room temperature after taking out the autoclave. The reaction product obtained after the reaction is a black solution, which is magnetically separated and washed 3-4 times with a mixture of ethanol and ultrapure water at a volume ratio of 1:1, and then placed in a vacuum dry...

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Abstract

The invention discloses a graphene composite nano-Fe3O4 radar wave absorption material and a preparation method thereof. The preparation method includes the following steps that divalent iron salt andtrivalent iron salt are dissolved in water and stirred to obtain an iron salt solution; a reduction-oxidation graphene solution is dispersed into an organic alcohol solvent and stirred to obtain dispersion liquid; the iron salt solution and the dispersion liquid are mixed, and a precipitating agent is added to obtain a mixed solution; the mixed solution is transferred to a reaction kettle for heating to obtain reaction products; the obtained reaction products are separated, washed and dried to obtain graphene composite nanometer Fe3O4; the graphene composite nanometer Fe3O4 is ground and fills the matrix to obtain the graphene composite nano-Fe3O4 radar wave absorption material. According to the technical scheme, the wave absorbing performance of the radar wave absorbing material can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of application of nanomaterials in radar absorbing materials, in particular to a graphene composite nano-Fe 3 o 4 Preparation method of radar wave absorbing material and graphene composite nano-Fe prepared by the preparation method 3 o 4 Radar absorbing material. Background technique [0002] Radar Absorbing Materials (RAM) is the fastest growing and most widely used class of stealth materials. It absorbs the incident electromagnetic wave, converts the electromagnetic energy into heat energy and consumes or makes the electromagnetic wave interfere and cancel, weakens the echo intensity of the target, and effectively reduces the radar cross section (Radar Cross Section) of aircraft, missiles, ships, tanks, armored vehicles and other targets. ), so as to achieve the effect of stealth. Wave absorbing materials need to have the characteristics of thin thickness, low density, broadband and strong absorption....

Claims

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Application Information

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IPC IPC(8): C08K3/22C08K3/04C08L91/06
CPCC08K3/042C08K3/22C08K2201/011C08K2003/2275C08L91/06
Inventor 奚克里
Owner 深圳市克得磁材技术有限公司
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