A preparation method of manganese oxide@ni-co/graphite carbon nanometer microwave absorbing composite material

A nano-composite material and manganese oxide technology, applied in antennas, electrical components, etc., can solve the problems of narrow absorption frequency band and weak magnetic loss, so as to reduce the use of KCl, improve electromagnetic wave absorption performance, and enhance dielectric loss capability Effect

Active Publication Date: 2022-05-20
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology

[0005] The invention provides a preparation method of manganese oxide @Ni-Co / graphite carbon nanometer microwave absorbing composite material, aiming to solve the technical problems of weak magnetic loss and narrow wave-absorbing frequency band existing when carbon materials and manganese oxide are used alone

Method used

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  • A preparation method of manganese oxide@ni-co/graphite carbon nanometer microwave absorbing composite material
  • A preparation method of manganese oxide@ni-co/graphite carbon nanometer microwave absorbing composite material
  • A preparation method of manganese oxide@ni-co/graphite carbon nanometer microwave absorbing composite material

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Embodiment 1

[0034] A preparation method of manganese oxide @Ni-Co / graphite carbon nanometer microwave absorbing composite material, comprising the following specific steps:

[0035] (1) Preparation of Ni-Co / Graphite Carbon Material

[0036] Disperse 529.38 mg of sodium citrate and 348.95 mg of nickel nitrate hexahydrate in 40 mL of deionized water and fully dissolve to obtain solution A, then disperse 258.67 mg of potassium cobaltcyanide (Ⅲ) in 40 mL of deionized water to obtain solution B;

[0037] The two were quickly mixed and stirred continuously, aged at 25 °C for 24 h, the precipitate was filtered, washed with deionized water and absolute ethanol, and dried in vacuum for 12 h to obtain Ni-Co PBA crystals;

[0038] Put 100 mg of Ni-Co PBA crystal into a porcelain boat, and place it in a tube furnace for annealing treatment. The annealing treatment step is to raise the temperature to 350 °C at a heating rate of 2 °C / min in an argon atmosphere, and maintain 1.5 h, After naturally cool...

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Abstract

The invention relates to a preparation method of manganese oxide@Ni-Co / graphite carbon nanocomposite material, specifically comprising the following steps: annealing Ni-CoPBA, adding KMnO 4 Afterwards, hydrothermal reaction is carried out, and then the reaction product is subjected to secondary calcination treatment, and finally manganese oxide @Ni‑Co / graphite carbon composite material is obtained; the present invention skillfully calcines Ni‑CoPBA to derive C, and through C and KMnO 4 Manganese oxide @Ni‑Co / graphitic carbon composite material is effectively synthesized through the oxidation-reduction reaction and secondary calcination treatment; the prepared material has both the excellent characteristics of Ni‑CoPBA and manganese oxide, and can be used as an absorbent with excellent performance. The wave agent is applied to the treatment of electromagnetic pollution; compared with the conventional preparation method, the invention reduces the use of reagent consumables and conforms to the concept of green environmental protection.

Description

technical field [0001] The invention relates to the field of preparation of microwave absorbing materials, in particular to a method for preparing a manganese oxide @Ni-Co / graphite carbon nanometer microwave absorbing composite material. Background technique [0002] In recent years, with the rapid development of science and technology, electronic products such as computers and mobile phones have been widely used, and electronic communication technologies such as transportation, communications, and military affairs have developed rapidly. Electromagnetic wave pollution has filled every corner of human life, causing many environmental problems and safety issues. question. In order to protect human health, strengthen communication security, and prevent radar detection, etc., the research and application of absorbing materials in the industry are becoming more and more urgent. The development can meet the requirements of thin thickness, low density, strong absorption, wide freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 高江姗何燕王欢欢周杨
Owner QINGDAO UNIV OF SCI & TECH
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