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Preparation method of ammonium nitrate assisted macroporous thin-layer carbon

A technology of ammonium nitrate and thin layer, which is applied in the preparation/purification of carbon, electrical components, antennas, etc. It can solve the problems of poor absorbing performance, large constant, and unfavorable impedance matching, so as to improve the degree of impedance matching and improve the dispersion , the effect of easy access to raw materials

Inactive Publication Date: 2021-01-22
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single carbon material has a large dielectric constant, which is not conducive to impedance matching, resulting in poor absorbing performance

Method used

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  • Preparation method of ammonium nitrate assisted macroporous thin-layer carbon
  • Preparation method of ammonium nitrate assisted macroporous thin-layer carbon
  • Preparation method of ammonium nitrate assisted macroporous thin-layer carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 1 g of glucose and 2 g of zinc nitrate in 20 ml of deionized water, sonicate for 15 minutes, and mix well. The prepared solution was moved to a blast drying oven, dried at 120 degrees Celsius for 7 hours, and complexed and foamed at low temperature to obtain a lightweight expansion precursor. The prepared expanded body was transferred to a tube furnace for heating, heated to 900°C at 5° / min under nitrogen atmosphere, and kept at 900°C for 2 hours. The composite wave absorbing material is obtained after heat treatment. The prepared composite wave absorbing material and paraffin were heated according to the ratio of material: paraffin = 1:8 until they were evenly mixed, and pressed into a ring tube with an outer diameter of 7.0 mm and an inner diameter of 3.0 mm to test the wave absorption performance.

[0024] figure 1 It shows that when the thickness is 4.5mm, the reflection attenuation can reach -44.2dB, and the corresponding bandwidth is 4.8GHz, showing exc...

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Abstract

The invention discloses a preparation method of ammonium nitrate assisted macroporous thin-layer carbon, which comprises the following steps: by using glucose as a carbon source and zinc nitrate as acomplexing pore-forming agent, dissolving different amounts of zinc nitrate and glucose in deionized water at room temperature to form a uniform mixed solution; and then obtaining the high-specific-capacitance macroporous thin-layer carbon through caramelization reaction, carbonization treatment and acid pickling. The preparation method of the high-specific-capacitance macroporous thin-layer carbon is green and environment-friendly, and the preparation process is simple. The method belongs to the technical field of preparation of novel carbon materials, and the carbon material prepared by themethod has high specific capacitance and high specific surface area as a supercapacitor electrode material, and has important application prospects in the fields of national defense science and technology, aerospace and the like.

Description

technical field [0001] The invention provides a preparation method of macroporous thin-layer carbon using ammonium nitrate assisted, and belongs to the field of novel carbon material preparation. Background technique [0002] With the rapid development of electronic information technology, the application of electromagnetic waves is becoming more and more extensive. The electromagnetic waves flooded in the environment will not only interfere with the electromagnetic control system and cause equipment failure, but also damage the physical and mental health of human beings. Therefore, it is of great significance to develop absorbing materials with electromagnetic wave absorbing ability. In addition, the application value in military stealth technology has also greatly promoted the research on absorbing materials. [0003] Because carbon materials have the advantages of excellent dielectric properties, good composite properties, special microstructure, low specific gravity, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C04B14/02C04B26/26H01Q17/00
CPCC01B32/05C04B26/26C04B14/022H01Q17/00C04B2111/00991C04B2111/00258C01P2006/90
Inventor 丁春艳吴松松殷彦菲孙申超
Owner SHANDONG UNIV OF TECH
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