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Double-layer allotype surface cement-based absorption material and preparation method thereof

A wave-absorbing material, cement-based technology, applied in the interdisciplinary field of electromagnetics and material science, can solve the problems of high density and high cost of cement-based wave-absorbing materials, achieve excellent wave-absorbing performance and mechanical properties, reduce absorption performance, protect environmental effects

Inactive Publication Date: 2017-08-18
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a double-layer special-shaped surface cement-based wave-absorbing material and its preparation method, which solves the technical problems of high density and high cost of the cement-based wave-absorbing material in the prior art

Method used

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  • Double-layer allotype surface cement-based absorption material and preparation method thereof
  • Double-layer allotype surface cement-based absorption material and preparation method thereof
  • Double-layer allotype surface cement-based absorption material and preparation method thereof

Examples

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Embodiment 1

[0036] Example 1: This example is a single-layer cement-based wave-absorbing material, including scheme a, scheme b and scheme c

[0037] Scheme a: This scheme is a single-layer cement-based wave-absorbing material, which is made of the following raw materials in weight percentage: 30% polystyrene foam, 4% fly ash, 4% carbon black, 4% wave-absorbing agent, and 15% cement , the balance is water; wherein, the wave absorbing agent is nickel-zinc ferrite, and the particle diameter of polystyrene foam particles is 1mm;

[0038] The preparation method of the single-layer cement-based wave-absorbing material of this embodiment comprises the following steps:

[0039] S1. Weigh the raw materials in weight percentage, put cement and water into the mortar mixer, and configure it into cement slurry with a water-cement ratio of 0.35, and set it aside. Among them, water is added twice, first pouring in 2 / 3 of the total volume of water After stirring for 3 minutes, pour in the remaining amo...

Embodiment 2

[0053] Example 2#: According to the raw materials and their dosages shown in Table 1, the preparation method of the double-layer special-shaped surface cement-based wave-absorbing material in this example includes the following steps:

[0054] S1. Weigh the raw materials in weight percentage, put cement and water into the mortar mixer, and configure it into a cement slurry with a water-cement ratio of 0.34. Among them, water is added twice, and water accounting for 2 / 3 of the total volume of water is poured first. , after stirring for 3 minutes, pour in the remaining amount of water, and stir for another 5 minutes;

[0055] S2. Add polystyrene foam to the cement slurry prepared in step S1, add at least one of fly ash, expanded perlite, and shale ceramsite or none, stir for 8 minutes, and then add a wave absorbing agent. Stir for 4 minutes to obtain the first mixed slurry, then inject the first mixed slurry into the mold, vibrate for 0.5min, and scrape the surface to obtain the...

Embodiment 3

[0058] Example 3#: According to the raw materials and their dosages shown in Table 1, the preparation method of the double-layer special-shaped surface cement-based wave-absorbing material in this example includes the following steps:

[0059] S1. Weigh the raw materials in percentage by weight, put cement and water into the mortar mixer, and configure it into a cement slurry with a water-cement ratio of 0.4, in which, water is added twice, and water accounting for 2 / 3 of the total volume of water is poured first. , after stirring for 3 minutes, pour in the remaining amount of water, and stir for another 5 minutes;

[0060] S2. Add polystyrene foam to the cement slurry prepared in step S1, add at least one of fly ash, expanded perlite, and shale ceramsite or none, stir for 4 minutes, and then add wave absorbing agent, Stir for 8 minutes to obtain the first mixed slurry, then inject the first mixed slurry into the mold, vibrate for 2 minutes, and scrape the surface to obtain th...

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Abstract

The invention provides a double-layer allotype surface cement-based absorption material and a preparation method thereof, which relate to the cross technology field of electromagnetism and material science. Cement is adopted as a matrix, polystyrene foam and pulverized fuel ash are adopted as admixtures, an appropriate microwave absorption agent is compounded, and the obtained double-layer allotype surface cement-based absorption material is low in cost, energy saving and environmentally-friendly; a traditional panel material is subjected to surface shape designs such as a double-layer shape, a triangular shape, a sinusoidal shape, a semicircular shape and a right-angle groove shape, so that a series of double-layer allotype surface cement-based absorption material with a favorable electromagnetic absorption performance is prepared, the density and the thickness are small, the effective absorption bandwidth smaller than -10dB within the range of 1.7 to 18GHz is 13GHz or more, and the minimum reflectance is less than -30dB.

Description

technical field [0001] The invention relates to the intersecting technical field of electromagnetism and material science, and relates to a double-layer special-shaped surface cement-based wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, especially electronic industry technology, electromagnetic wave radiation has become another major public hazard after noise pollution, air pollution, water pollution and solid waste pollution. Electromagnetic interference (EMI) generated by electromagnetic wave radiation will not only affect the normal operation of various electronic devices, but also have varying degrees of harm to the central nervous system, blood and cardiovascular system, reproductive system and immune system of the human body. Electromagnetic shielding only reflects electromagnetic waves back to free space, and cannot fundamentally solve electromagnetic pollution. With ...

Claims

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Application Information

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IPC IPC(8): C04B38/08C04B28/00
CPCC04B28/00C04B2111/00258C04B2111/00612C04B16/08C04B18/08C04B22/06C04B14/185C04B18/027C04B14/062C04B38/08
Inventor 张月芳郝万军李宝毅
Owner HAINAN UNIVERSITY
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