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Method for preparing carbon-coated manganese oxygen compound electromagnetic wave absorbing material

A technology of manganese oxide compounds and absorbing materials, which is applied in chemical instruments and methods, nanotechnology for materials and surface science, manganese oxide/hydroxide, etc. , incomplete impedance matching, etc., to achieve the effect of large dielectric loss, good impedance matching, and environmental friendliness

Active Publication Date: 2020-02-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the incomplete matching of material impedance and relatively small loss in the existing technology, there are still some application requirements that cannot be met.
At the same time, the high density and composite ratio of existing technology materials also make it difficult to be widely used in some cutting-edge fields.

Method used

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  • Method for preparing carbon-coated manganese oxygen compound electromagnetic wave absorbing material
  • Method for preparing carbon-coated manganese oxygen compound electromagnetic wave absorbing material
  • Method for preparing carbon-coated manganese oxygen compound electromagnetic wave absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The carbon-coated manganese oxide wave-absorbing material prepared by the method of the present invention is compounded with paraffin, and the mass content of the carbon-coated manganese oxide wave-absorbing material prepared by the method of the present invention is 5%.

[0026] Step 1) Preparation of manganese oxyhydroxide nanowires: mix potassium permanganate and ethylene glycol in water at a mixing ratio of 0.2g: 1ml: 80ml, stir for 5h, then heat in a reactor at 130 degrees Celsius, and centrifuge for 10 hours to obtain product and dried; the microstructure of the obtained product manganese oxyhydroxide nanowires is as follows figure 1 shown.

[0027] Step 2) Carry out carbon coating on manganese oxyhydroxide: mix manganese oxyhydroxide and dopamine hydrochloride in tris-hydrochloric acid buffer solution with the dried product obtained in step 1) according to the ratio of 80mg: 80mg: 200ml Stir for 4.5 hours, then centrifuge, and dry to obtain the product;

[0028...

Embodiment 2

[0031] The carbon-coated manganese oxide wave-absorbing material prepared by the method of the invention is compounded with paraffin wax, and the mass content of the carbon-coated manganese oxide wave-absorber material prepared by the method of the invention is 10%.

[0032] Step 1) Preparation of manganese oxyhydroxide nanowires: mix potassium permanganate and ethylene glycol in water at a mixing ratio of 0.2g: 1ml: 80ml, stir for 5h, then heat in a reactor at 130 degrees Celsius, and centrifuge for 10 hours to obtain product and dried; the microstructure of the obtained product manganese oxyhydroxide nanowires is as follows figure 1 shown.

[0033] Step 2) Carry out carbon coating on manganese oxyhydroxide: mix manganese oxyhydroxide and dopamine hydrochloride in tris-hydrochloric acid buffer solution with the dried product obtained in step 1) according to the ratio of 80mg: 80mg: 200ml Stir for 4.5 hours, then centrifuge, and dry to obtain the product;

[0034] Step 3) Pr...

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Abstract

The invention relates to a method for preparing a carbon-coated manganese oxygen compound electromagnetic wave absorbing material. The method comprises: preparing, by using potassium permanganate andethanediol, a manganese oxyhydroxide one-dimensional nanowire by a hydrothermal method; then coating the manganese oxyhydroxide one-dimensional nanowire with carbon in a buffer solution by a dopaminehydrochloride method; and finally sintering a product at high temperature. The carbon in the composite material prepared by the method of the present invention uniformly coats the manganese oxygen compound nanofibers, so that the composite material has a one-dimensional structure, a core-shell structure, and a high specific area so as to have good electromagnetic wave absorption performance.

Description

technical field [0001] The invention relates to a method for preparing a carbon-coated manganese oxide compound electromagnetic wave-absorbing material. The invention belongs to the field of electromagnetic wave absorbing materials. Background technique [0002] After the second industrial revolution, electromagnetic wave technology developed faster and faster, and now it has entered various fields closely related to human beings, such as: communication, radar detection, guidance, etc. Based on the needs of military, security, protection, etc., the demand for electromagnetic wave absorbing materials is increasing day by day, especially for the absorption of electromagnetic waves in the gigahertz frequency range, which is a hot research topic. The so-called electromagnetic wave absorbing material refers to a class of materials that can absorb or greatly weaken the electromagnetic wave energy projected on its surface, thereby weakening the electromagnetic wave. In engineerin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C01G45/02C01B32/15B82Y30/00B82Y40/00C09K3/00
CPCB82Y30/00B82Y40/00C01G45/02C01P2004/16C01P2004/80C09K3/00C01B32/15H05K9/0081
Inventor 王广胜唐家悦刘子涵韦剑鸿张煜恒
Owner BEIHANG UNIV
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