Method for absorbing electromagnetic waves by adopting layered nickel-cobalt double-metal hydroxide/diatomite composite material

A technology for absorbing electromagnetic waves and hydroxides, applied in nanotechnology, nickel compounds, chemical instruments and methods for materials and surface science, to achieve simple preparation methods, solve impedance mismatch, and good wave-absorbing performance

Pending Publication Date: 2022-02-18
CHONGQING UNIV
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  • Description
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  • Method for absorbing electromagnetic waves by adopting layered nickel-cobalt double-metal hydroxide/diatomite composite material
  • Method for absorbing electromagnetic waves by adopting layered nickel-cobalt double-metal hydroxide/diatomite composite material
  • Method for absorbing electromagnetic waves by adopting layered nickel-cobalt double-metal hydroxide/diatomite composite material

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Embodiment 1

[0035] Diatomaceous earth, nickel nitrate, cobalt nitrate, urea, ammonium fluoride according to the ratio of 70mg: 261.7mg: 87.3mg: 432mg: 370mg, in 70mL deionized water using a magnetic stirrer to stir for 10min, after mixing evenly, transfer into polytetrafluoroethylene In an ethylene reactor, conduct a hydrothermal reaction at 120°C for 12 hours, and cool naturally to room temperature; after the reaction, collect the solid product produced by the reaction, wash it with water and ethanol, and then dry it at 60°C to obtain a layered nickel-cobalt bimetallic Hydroxide / Diatomaceous Earth Composite.

[0036] Adopt X-ray diffraction instrument to carry out XRD analysis to the layered nickel-cobalt double metal hydroxide / diatomite composite material that obtains, and the characterization result is as follows figure 1 shown. Obtain the scanning electron microscope picture of layered nickel-cobalt double metal hydroxide / diatomite composite material as figure 2 and image 3 shown. ...

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Abstract

The invention discloses a method for absorbing electromagnetic waves by adopting a layered nickel-cobalt double-metal hydroxide / diatomite composite material. The preparation method of the wave-absorbing composite material comprises the following steps: uniformly mixing diatomite, nickel nitrate, cobalt nitrate, urea and ammonium fluoride according to a ratio of 70mg:261.7mg:87.3mg:432mg:370mg in 70ml of deionized water, transferring the mixture into a polytetrafluoroethylene reaction kettle, and carrying out hydrothermal reaction at 110-130 DEG C under self-generated pressure for 8-14 hours to obtain a wave-absorbing composite material. According to the layered nickel-cobalt double-metal hydroxide / diatomite composite material prepared by the method, the wave absorbing performance of the composite material is improved by exerting the synergistic effect of the layered nickel-cobalt double-metal hydroxide and the diatomite, and the composite material has a relatively great prospect in application and popularization in the field of electromagnetic wave absorption.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave absorption, and in particular relates to a method for absorbing electromagnetic waves by using a layered nickel-cobalt double metal hydroxide / diatomite composite material. Background technique [0002] With the development of modern science and technology, various electrical and electronic devices emerge in an endless stream, which not only bring great convenience to human beings, but also bury hidden dangers of electromagnetic pollution. Electromagnetic pollution is another big new pollution following water pollution, air pollution and noise pollution. It is very harmful and difficult to protect, and its impact on human health, production and living environment is increasing day by day. [0003] Under the radiation of electromagnetic waves, the tissues of the human body heat up, and the temperature rises, causing structural damage to proteins, enzymes and organs in the body, making them unable...

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Application Information

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IPC IPC(8): C01B33/40C01G53/00H05K9/00B82Y30/00B82Y40/00
CPCC01B33/40C01G53/00H05K9/0081B82Y30/00B82Y40/00C01P2002/72C01P2004/80C01P2004/03
Inventor 张育新张益帆李凯霖滕昊吴宇桐王大双丛大龙宋凯强李南郑伟董立超白晶莹平托兰天
Owner CHONGQING UNIV
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