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Preparation method of high-absorptivity carbon-based wave absorbing material

A wave-absorbing material and strong absorption technology, applied to electrical components, antennas, etc., can solve problems such as limited wave-absorbing performance, weak magnetic loss, and single absorption frequency band

Inactive Publication Date: 2018-06-22
吴迪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is aimed at the problems of single absorption frequency band, high density, and weak absorption in the current traditional wave-absorbing materials. Although carbon materials have excellent dielectric properties and low-density characteristics, pure carbon materials There is no magnetic loss or the magnetic loss is very weak, which limits the improvement of its wave-absorbing performance, and provides a preparation method for a strong-absorbing carbon-based wave-absorbing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] In parts by weight, 20 parts of tryptone, 5 parts of sodium chloride, 15 parts of beef extract, 10 parts of agar and 100 parts of water are mixed to obtain a self-made fermentation substrate, the fermentation substrate is packed into a fermenter, and then The concentration of adding 10% of the mass of fermentation substrate in the fermenter is 10 7cfu / mL suspension of Bacillus circulans, sealed and fermented at 35°C for 3 days; after the fermentation was completed, separated by filtration with two layers of gauze to obtain the fermentation filtrate, and then weighed 30 parts of cobalt nitrate, 20 parts by weight 10 parts of ferric chloride, 10 parts of nickel nitrate and 500 parts of deionized water are mixed to obtain a metal salt solution; the fermentation filtrate obtained above is mixed with the metal salt solution in a mass ratio of 1:2, and then packed into a ceramic pot with an aeration device at the bottom. jar, and then moved the ceramic jar into a greenhouse w...

example 2

[0028] In parts by weight, 25 parts of tryptone, 8 parts of sodium chloride, 18 parts of beef extract, 13 parts of agar and 150 parts of water are mixed to obtain a self-made fermentation substrate, the fermentation substrate is packed into a fermenter, and then The concentration of adding 10% of the mass of fermentation substrate in the fermenter is 10 7 cfu / mL suspension of Bacillus circulans, sealed and fermented at 40°C for 4 days; after the fermentation was finished, filter and separate with two layers of gauze to obtain the fermentation filtrate, and weighed 35 parts of cobalt nitrate, 25 parts by weight. Part ferric chloride, 13 parts of nickel nitrate and 550 parts of deionized water are mixed to obtain a metal salt solution; the fermentation filtrate obtained above is mixed with the metal salt solution in a mass ratio of 1:2 and then packed into a ceramic pot with an aeration device at the bottom. jar, and then move the ceramic jar into a greenhouse with a temperature...

example 3

[0030] In parts by weight, 30 parts of tryptone, 10 parts of sodium chloride, 20 parts of beef extract, 15 parts of agar and 200 parts of water are mixed to obtain a self-made fermentation substrate, the fermentation substrate is packed into a fermenter, and then The concentration of adding 10% of the mass of fermentation substrate in the fermenter is 10 7 cfu / mL suspension of Bacillus circulans, sealed and fermented at 45°C for 5 days; after the fermentation was finished, filter and separate with two layers of gauze to obtain the fermentation filtrate, and weighed 40 parts of cobalt nitrate, 30 parts by weight 1 part of ferric chloride, 15 parts of nickel nitrate and 600 parts of deionized water are mixed to obtain a metal salt solution; the fermentation filtrate obtained above is mixed with the metal salt solution in a mass ratio of 1:2 and then packed into a ceramic pot with an aeration device at the bottom. tank, and then moved the ceramic tank into a greenhouse with a tem...

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Abstract

The invention relates to the technical field of electromagnetic material preparation, and particularly relates to a preparation method of a high-absorptivity carbon-based wave absorbing material. Themethod comprises the following steps: firstly performing fermentation to obtain fermentation filtrate containing rich organic matters and microorganisms, blending the fermentation filtrate with a magnetic metal salt, adsorbing magnetic metal ions via the microorganisms, performing flocculent precipitation to obtain a flocculate, mixing the flocculate with anhydrous ethanol and boric acid to obtaina fuel, burning the fuel via the "self-generated catalysis" effect of a polished nickel plate to obtain nano-carbon doped with the magnetic metal ions and boron elements, causing a part of metal ionsin the nano-carbon to depart and enter a citric acid organic matter under the conditions of high pressure and high temperature to generate crystal lattice hole notches, and finally reducing the magnetic metal ions into simple substance by using hydrogen to obtain the high-absorptivity carbon-based wave absorbing material with the crystal lattice hole notches and doped with the boron elements. Thewave absorbing material prepared by the preparation method provided by the invention is wide in absorption frequency band, small in density and high in absorptivity, thereby having a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of electromagnetic material preparation, in particular to a preparation method of a strong-absorbing carbon-based wave-absorbing material. Background technique [0002] With the development of science and technology, a large number of electronic devices have entered daily life, and electromagnetic radiation pollution has become increasingly serious, gradually becoming a new social hazard. Electromagnetic radiation will not only interfere with the normal operation of electronic instruments and equipment, but also affect human health. In the military, the international competition of weapons and equipment is becoming increasingly fierce. With the development of detection technology, achieving target stealth in war has far-reaching significance for improving the survival and penetration strike capabilities of weapon systems. At present, the most effective way to solve electromagnetic radiation pollution and ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 吴迪张晶
Owner 吴迪
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