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Carbon nanometer fiber/ferrite composite absorbing material and preparation method thereof

A composite wave absorbing material and carbon nanofiber technology, applied in the field of wave absorbing materials, can solve the problems of being thin, light, wide and strong, and achieve the elimination of internal stress and lattice defects, good mechanical properties, and easy operation. Effect

Active Publication Date: 2014-06-04
钟春燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of military affairs, modern warfare has put forward higher and higher requirements for the performance of absorbing materials. Generally speaking, absorbing materials in the traditional sense have been difficult to meet the comprehensive requirements of thinness, lightness, width and strength.

Method used

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  • Carbon nanometer fiber/ferrite composite absorbing material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh iron salt and be dissolved in the ethylene glycol of 90wt% concentration, and add zinc salt, wherein Zn 2+ The ratio of the number of moles of Fe3+ to the number of moles of Fe3+ is 1:2, the bacterial cellulose is added for ultrasonic dispersion for 30 minutes, and the mass ratio of the total weight of iron salt and zinc salt to the bacterial cellulose is 1:1;

[0027] and Fe 3+ Anhydrous sodium acetate with a molar ratio of 8:1, a dispersant whose volume accounts for 2% of the volume of ethylene glycol, heated and dissolved at 60°C for 30 minutes, and the mixture was obtained after the powder was completely dissolved;

[0028] Put the above mixture into a reaction kettle and react at 140°C for 15 h. After the reaction is completed, it is naturally cooled to room temperature, washed with deionized water for 2 to 5 times and then dried. The obtained compound is vacuum carbonized in an atmosphere furnace, and the temperature is raised from room temperature To 300°C...

Embodiment 2

[0031] Weigh iron salt and dissolve it in the ethylene glycol of 95wt%, and add magnesium salt and zinc salt, wherein Mg 2+ and Zn 2+ The ratio of the sum of the moles of Fe3+ to the moles of Fe3+ is 1:2, the bacterial cellulose is added for ultrasonic dispersion for 60 minutes, and the mass ratio of the total weight of iron salt, magnesium salt and zinc salt to the bacterial cellulose is 1:0.8 ;

[0032] and Fe 3+ Anhydrous sodium acetate with a molar ratio of 9:1, a dispersant whose volume accounts for 2% of the volume of ethylene glycol, heated and dissolved at 70°C for 25 minutes, and the mixture was obtained after the powder was completely dissolved;

[0033] Put the above mixture into the reaction kettle and react at 150 °C for 13 h. After the reaction was completed, it was naturally cooled to room temperature, washed with deionized water for 2 to 5 times and then dried. The obtained compound was placed in an atmosphere furnace for carbonization under vacuum. Raise th...

Embodiment 3

[0036] Weigh iron salt and be dissolved in the ethylene glycol of 98wt% in concentration, and add nickel salt, zinc salt and copper salt, wherein Ni 2+ , Zn 2+ 、Cu 2+ The sum of moles and Fe 3+ The molar ratio of the bacterial cellulose is 1:2, the bacterial cellulose is added for ultrasonic dispersion for 90 minutes, and the mass ratio of the total weight of the iron salt, nickel salt, zinc salt and copper salt to the bacterial cellulose is 1:0.6;

[0037] and Fe 3+ Anhydrous sodium acetate with a molar ratio of 10:1, a dispersant whose volume accounts for 3% of the volume of ethylene glycol, heated and dissolved at 80°C for 20 minutes, and the mixture was obtained after the powder was completely dissolved;

[0038]Put the above mixture into the reaction kettle and react at 160 °C for 10 h. After the reaction is completed, it is naturally cooled to room temperature, washed with deionized water for 2 to 5 times, and then dried. The obtained compound is placed in an atmosphe...

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Abstract

The invention discloses a carbon nanometer fiber / ferrite composite absorbing material and a preparation method thereof, and relates to the absorbing material preparation technology; the method comprises the following steps: weighting ferric salt to be resolved in glycol; adding one or more from a group formed by zinc salt, nickel salt, magnesium salt, copper salt, and cobalt salt; adding bacteria cellulose for ultrasonic dispersion; adding waterless sodium acetate and dispersant; carrying out mechanical stirring and ultrasonic dispersion; adding mixture ina reaction vessel after powders are completely solved; natural cooling to room temperature after reaction is done; using deionized water to wash; drying; using high temperature carbonization to process dried composite so as to obtain the composite absorbing material with ferrite uniformly arranged in a carbon nanometer fiber three dimensional network; the preparation process is green and environmental protection, simple and easy, convenient in operation, low in cost, and the obtained composite absorbing material is strong in electromagnetic wave absorption, wide in absorption frequency band width, excellent in mechanical property and thermally-stabilised performance, and is ultrathin and super light.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a carbon nanofiber / ferrite composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of the electronic industry and the widespread use of more and more electronic products, electromagnetic shielding technology and stealth technology have been further developed in recent years, and people's research on wave-absorbing materials has also received more attention and attention. Moreover, the detection, tracking, and attack capabilities of various defense systems in the world are increasing day by day, and the survivability and penetration capabilities of military targets in the sea, land, and air forces are seriously threatened; Stealth technology, one of the effective means of strike capability, is gradually becoming the most important and effective tactical means. The wave-absorbing material technology is the...

Claims

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Application Information

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IPC IPC(8): C09K3/00
Inventor 钟春燕
Owner 钟春燕
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