Putty with electromagnetic wave absorption function

A technology for absorbing electromagnetic waves and putty, applied in the direction of filling slurry, etc., can solve problems such as shielding pollution, and achieve the effect of avoiding damage and eliminating influence.

Active Publication Date: 2009-03-18
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The 200410040170.9 patent application provides a solution for the shielding of electromagnetic waves. However, this solution protects indoor personnel from radiation, but the reflected

Method used

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  • Putty with electromagnetic wave absorption function
  • Putty with electromagnetic wave absorption function
  • Putty with electromagnetic wave absorption function

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example one:

[0029]

[0030]

[0031] Detection of wave absorbing performance: According to the above-mentioned method, when the graphite powder mass percentage content is 28% at room temperature (25°C), the minimum reflectivity of this putty to electromagnetic waves at 8-18GHz is -15dB. This value shows the attenuation value of the reflected wave, indicating that the putty of this embodiment can effectively absorb energy and attenuate the reflected wave energy.

Example Embodiment

[0032] Embodiment two:

[0033]

[0034] Detection of microwave absorbing performance: According to the above-mentioned method, when the mass percentage of acetylene carbon black powder is 24% at room temperature (25℃), the average reflection attenuation of the putty for electromagnetic waves at 8-18GHz in this example is -8dB .

Example Embodiment

[0035] Embodiment three:

[0036]

[0037] Detection of microwave absorption performance: According to the above-mentioned method, at room temperature (25℃), when the mass percentage of Mn-Zn ferrite powder is 16%, the average reflection attenuation of putty to electromagnetic wave at 8~18GHz is- 5dB.

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Abstract

The invention discloses putty with the function of absorbing electromagnetic wave and belongs to the field of building material. The putty in each 100 mass portions contains 10 to 50 mass portions of a wave absorbing agent; the wave absorbing agent is one or a combination of nanometer Fe-graphite composite powder, manganese-zinc ferrite powder, manganese dioxide powder and acetylene black powder. The reflectivity of the putty to the electromagnetic wave of between 8 and 18 GHz is less than 5 dB below zero; and the putty can effectively absorb energy to attenuate the energy of reflected wave. When the putty is used as an inner wall coating material, the putty can effectively absorb the electromagnetic wave produced by indoor electrical appliances and the like and remove the influence of the electromagnetic wave on personnel; when the putty is applied to the outer wall, the putty can obstruct and absorb the electromagnetic radiation of a television, a mobile phone and other signal towers, protect personnel in a building from being suffered from the electromagnetic radiation, can also directly absorb the electromagnetic wave and avoid that the reflected electromagnetic wave causes harm to the personnel outside the building.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a functional putty capable of absorbing electromagnetic waves. Background technique [0002] With the continuous improvement of people's living standards and the continuous acceleration of the pace of life, in order to facilitate our daily life, various equipment such as TVs, computers, refrigerators, microwave ovens, TV relay towers, and mobile phone signal transmitting stations have entered our lives. They not only bring us convenience, but also bring us harm to our bodies. Studies have shown that electromagnetic waves radiated by electronic equipment affect the cardiovascular system, immune and metabolic functions of the human body, and have adverse effects on the human visual system. Eyes are sensitive to electromagnetic waves, and excessive electromagnetic radiation can cause vision loss and cataracts. [0003] New problems have put forward new requirements fo...

Claims

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Application Information

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IPC IPC(8): C09D5/34
Inventor 冀志江韩斌张忠伦王静侯国艳李海建王晓燕王继梅
Owner CHINA BUILDING MATERIALS ACAD
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