A double-layer cement-based wave-absorbing material and its preparation method

A wave-absorbing material and cement-based technology, applied in the field of functional materials, can solve the problems of narrow effective bandwidth, difficulty in satisfying the absorption broadband, and few variable parameters of the absorber, so as to achieve improved attenuation, easy spatial impedance matching, and excellent The effect of the absorbing effect

Active Publication Date: 2021-11-05
ROCKET FORCE UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A lot of research has been done on concrete that can absorb electromagnetic waves at a certain frequency and absorption bandwidth. Require

Method used

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  • A double-layer cement-based wave-absorbing material and its preparation method

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preparation example Construction

[0034] A preparation method of a double-layer cement-based wave-absorbing material provided by the invention comprises the following steps:

[0035] Step 1, preparing the lower layer of absorbing material, the specific method is:

[0036] S1, in terms of parts by mass, weigh the lower wave-absorbing material, including the following raw material components: 100-130 parts of water, 10-15 parts of nano-carbonyl iron wave-absorbing material, 300-400 parts of Portland cement, 500 parts ~600 parts of fine aggregate, 800 parts of gravel and 1.0~2.0 parts of water reducer;

[0037] S2, adding the water reducer in S1 into water, stirring at room temperature until completely dissolved to obtain an aqueous solution;

[0038] S3, put the nano-carbonyl iron wave-absorbing material, Portland cement, fine aggregate and gravel in S1 into a high-speed mixer, and disperse for 30 minutes at a speed of 200r / min to obtain a powder;

[0039] S4, put the powder after high-speed mixing in S3 into ...

Embodiment 1

[0051]A preparation method of a double-layer cement-based wave-absorbing material provided by the invention comprises the following steps:

[0052] Step 1, preparing the lower layer of absorbing material, the specific method is:

[0053] S1, in terms of parts by mass, weigh the lower absorbing material, including the following raw material components: 130 parts of water, 15 parts of nano-carbonyl iron absorbing material, 400 parts of Portland cement, 500 parts of fine aggregate, 800 parts of gravel and 2.0 parts of water reducer;

[0054] S2, adding the water reducer in S1 into water, stirring at room temperature until completely dissolved to obtain an aqueous solution;

[0055] S3, put the nano-carbonyl iron wave-absorbing material, Portland cement, fine aggregate and gravel in S1 into a high-speed mixer, and disperse for 30 minutes at a speed of 200r / min to obtain a powder;

[0056] S4, put the powder after high-speed mixing in S3 into a mixer, and slowly add the aqueous s...

Embodiment 2

[0067] A preparation method of a double-layer cement-based wave-absorbing material provided by the invention comprises the following steps:

[0068] Step 1, preparing the lower layer of absorbing material, the specific method is:

[0069] S1, in terms of parts by mass, weigh the lower absorbing material, including the following raw material components: 100 parts of water, 10 parts of nano-carbonyl iron absorbing material, 300 parts of Portland cement, 600 parts of fine aggregate, 800 parts of gravel and 1.0 parts of water reducer;

[0070] S2, adding the water reducer in S1 into water, stirring at room temperature until completely dissolved to obtain an aqueous solution;

[0071] S3, put the nano-carbonyl iron wave-absorbing material, Portland cement, fine aggregate and gravel in S1 into a high-speed mixer, and disperse for 30 minutes at a speed of 200r / min to obtain a powder;

[0072] S4, put the powder after high-speed mixing in S3 into a mixer, and slowly add the aqueous ...

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Abstract

A double-layer cement-based wave-absorbing material and a preparation method thereof provided by the present invention are composed of an upper-layer absorbing material and a lower-layer absorbing material superimposed and arranged; wherein, the upper-layer wave-absorbing material includes the following raw material components in parts by mass: 100-130 100 parts of water, 10-15 parts of ferrite nanocomposite wave-absorbing material, 300-400 parts of Portland cement, 500-600 parts of fine aggregate, 800 parts of gravel and 1.0-2.0 parts of water-reducing agent; the lower absorbing material is calculated in parts by mass, including the following raw material components: 100-130 parts of water, 10-15 parts of nano-carbonyl iron wave-absorbing material, 300-400 parts of Portland cement, 500-600 parts fine aggregate, 800 parts of crushed stone and 1.0-2.0 parts of water reducer; the present invention uses nano-ferrite as the surface layer absorbent, fully utilizes the advantages of ferrite’s good spatial impedance matching performance, and the bottom layer adopts nano Carbonyl iron powder makes full use of the advantages of good attenuation performance of carbonyl iron powder, realizes the complementary advantages of the two, and obtains a wave-absorbing material with excellent performance.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a double-layer cement-based wave-absorbing material and a preparation method thereof. Background technique [0002] Radar absorbing material (RAM) refers to a class of functional materials that can effectively absorb incident electromagnetic waves and attenuate them. The energy-consuming absorbing materials in radar absorbing materials are mainly composed of radar wave absorbers and matrix materials (ie, adhesives). constitute. The key to manufacturing microwave-absorbing materials is to have an absorbent with excellent performance, which can be realized through reasonable formula design, impedance matching design and perfect process operation. Traditional absorbers mainly include graphite, ferrite, metal particles, metal fibers, carbon fibers, barium titanate, silicon carbide, etc., and the thickness of the absorbing materials is generally as high as 5-10mm. Due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/36
CPCC04B28/04C04B2111/00258C04B2111/00612C04B14/00C04B14/02C04B14/363C04B2103/302C04B14/36
Inventor 刘渊王炜陈桂明贾瑛
Owner ROCKET FORCE UNIV OF ENG
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