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Preparation method of double-layer cement-based wave-absorbing material

A wave-absorbing material, cement-based technology, applied in the field of functional materials, can solve the problems of information leakage, interference with the use of instruments, human body hazards, etc.

Inactive Publication Date: 2017-05-31
SHAANXI SHENGMAI PETROLEUM
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Problems solved by technology

[0002] While the rapid development of information technology has brought convenience to the world, it is also accompanied by unfavorable aspects—electromagnetic radiation. On the one hand, electromagnetic radiation will cause harm to the human body; on the other hand, it will also interfere with the use of instruments and the leakage of accompanying information

Method used

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Embodiment Construction

[0012] The preparation method of double-layer cement-based wave-absorbing material comprises the following steps:

[0013] (1) Dispersion of carbon nanotubes: First add the dispersant to a beaker filled with water, stir on a magnetic stirrer for 1 minute, then add carbon nanotubes and continue stirring for 3 minutes; after the stirring is completed, take out the rotor and put the beaker in Put it in an ultrasonic cleaner and disperse for 5 minutes under the condition of temperature 20°C and power 90W;

[0014] (2) Preparation of matching layer and wave-absorbing layer: first pour the required amount of water into the mixing pot, then add cement and put the stirring pot on the mixer, rise and fix it; start the mixer, stir slowly for 30s, At the beginning of the next 30s, add expanded perlite or sand evenly into the slurry, and then stir at high speed for 30s; stop stirring for 90s, then stir at high speed for 60s, scrape the mortar on the stirring blade and the wall of the stir...

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Abstract

The invention relates to the technical field of functional materials, and particularly relates to a preparation method of a double-layer cement-based wave-absorbing material. The preparation method of the double-layer cement-based wave-absorbing material comprises the following steps of (1), dispersing a carbon nano tube; (2), preparing a matching layer and a wave-absorbing layer; (3), preparing the double-layer cement-based wave-absorbing material. According to the preparation method, expanded perlite is used as an impedance matching layer; the carbon nano tube and ferrite are used as wave absorber to prepare a double-layer cement-based wave-absorbing body; the wave absorption performance of a cement-based wave-absorbing material is researched. Shown by an experimental result, the wave transmission rate of the matching layer is increased as the doping amount of the expanded perlite is increased; in the frequency range of 8GHz to 18GHZ, the wave transmission rate of a test sample in which 20 percent of the expanded perlite is doped is between 20 percent and 60 percent; the wave absorption performance of a double-layer cement-based material prepared by using cement paste of the expanded perlite as the matching layer is superior to a single-layer wave-absorbing material with the same thickness.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a preparation method of a double-layer cement-based wave-absorbing material. Background technique [0002] While the rapid development of information technology has brought convenience to the world, it is also accompanied by unfavorable aspects—electromagnetic radiation. On the one hand, electromagnetic radiation will cause harm to the human body; on the other hand, it will also interfere with the use of instruments and the leakage of accompanying information. Therefore, both civil and military use have higher requirements on the ability of materials to prevent electromagnetic radiation. Cement-based materials are the most widely used building materials for various building facilities, and the research on their electromagnetic radiation performance is of great significance. [0003] Absorbing materials refer to a class of materials that can absorb and attenuate incid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/18C04B14/02
CPCC04B28/00C04B14/026C04B14/185C04B2111/00008C04B2111/00612
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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