Production method of electromagnetic wave-absorbing gypsum composite material

A composite material and absorbing technology, applied in the field of wave absorbing materials, can solve problems such as poor mechanical properties, achieve the effects of improving mechanical properties, reducing grain boundary resistivity, and increasing hysteresis loss

Active Publication Date: 2019-11-05
黄梅龙源石膏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Technical problem to be solved by the present invention: Aiming at the problem of poor mechanical properties of existing gypsum-based wave-absorbing materials, a preparation method of electromagnetic wave-absorbing gypsum composite material is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix carbon fiber and antimony trioxide in a ball mill at a mass ratio of 1:3, and mill for 20 minutes at a ball milling speed of 300r / min to obtain a mixed material. Mix lanthanum nitrate and deionized water evenly at a mass ratio of 1:8 , to obtain the mixed solution, mix the mixed material and the mixed solution according to the mass ratio of 1:1, and continue ball milling for 10 minutes to obtain the filler; in parts by weight, take 30 parts of ferrous chloride, 10 parts of iron powder, 5 parts of Part mass fraction is 3% hydrochloric acid, 80 parts of deionized water, ferrous chloride, iron powder and deionized water are mixed uniformly, promptly gets reaction solution, in reaction solution, drop mass fraction is 3% hydrochloric acid, at temperature 40°C, stirred at a stirring speed of 200r / min for 20min, filtered to obtain the filtrate; in parts by weight, weigh 30 parts of filtrate, 10 parts of filler, 1 part of polyethylene glycol, 80 parts of absolute ethanol, 40...

Embodiment 2

[0035] Mix carbon fiber and antimony trioxide in a ball mill at a mass ratio of 1:3, and mill for 250 minutes at a ball milling speed of 350r / min to obtain a mixed material. Mix lanthanum nitrate and deionized water evenly at a mass ratio of 1:8 , to obtain the mixed solution, mix the mixed material and the mixed solution according to the mass ratio of 1:1, and continue ball milling for 15 minutes to obtain the filler; in parts by weight, take 35 parts of ferrous chloride, 12 parts of iron powder, 8 Part mass fraction is 3% hydrochloric acid, 90 parts of deionized water, ferrous chloride, iron powder and deionized water are mixed uniformly, promptly gets reaction solution, in reaction solution, drip mass fraction is 3% hydrochloric acid, at temperature 45°C, stirred at a stirring speed of 250r / min for 25min, filtered to obtain the filtrate; in parts by weight, 35 parts of filtrate, 15 parts of filler, 3 parts of polyethylene glycol, 85 parts of absolute ethanol, 50 parts of Te...

Embodiment 3

[0037] Mix carbon fiber and antimony trioxide in a ball mill at a mass ratio of 1:3, and mill at a ball milling speed of 400r / min for 30 minutes to obtain a mixed material. Mix lanthanum nitrate and deionized water evenly at a mass ratio of 1:8 , to obtain the mixed solution, mix the mixed material and the mixed solution according to the mass ratio of 1:1, and continue ball milling for 20min to obtain the filler; in parts by weight, take 40 parts of ferrous chloride, 15 parts of iron powder, 10 parts of Parts mass fraction is 3% hydrochloric acid, 100 parts deionized water, ferrous chloride, iron powder and deionized water are mixed uniformly, promptly gets reaction solution, in reaction solution, drip mass fraction is 3% hydrochloric acid, at temperature 50°C, stirred at a stirring speed of 300r / min for 30min, filtered to obtain the filtrate; in parts by weight, weighed 40 parts of filtrate, 20 parts of filler, 5 parts of polyethylene glycol, 90 parts of absolute ethanol, 60 p...

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PUM

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Abstract

The invention relates to a production method of an electromagnetic wave-absorbing gypsum composite material, and belongs to the technical field of wave-absorbing materials. According to the productionmethod of the electromagnetic wave-absorbing gypsum composite material, antimonous oxide and carbon fibers are mechanically mixed, rare earth is adopted for doping to modify an obtained mixture, an obtained modified mixture is used as filler, through a sol-gel method, ferrous titanate is produced, and is used as an absorbent, gypsum is used as a matrix, and the matrix and the absorbent are subjected to composition to produce the electromagnetic wave-absorbing gypsum composite material; the antimonous oxide not only has wave transmittance, but also has certain absorbing capability, after rareearth doping modification is conducted, the magnetic performance and the wave absorbing performance are effectively improved, the ferrous titanate is an inorganic functional material with microwave absorbing performance, and has good wave absorbing performance, and the carbon fibers can effectively improve the mechanical performance of the material; and an ilmenite structure has a large electricalloss tangent angle, by means of electronic polarization, ionic polarization, molecular polarization or interfacial polarization of a medium, electromagnetic waves are attenuated and absorbed, and theferrous titanate compound has an excellent impedance matching property.

Description

technical field [0001] The invention relates to a preparation method of an electromagnetic wave-absorbing gypsum composite material, which belongs to the technical field of wave-absorbing materials. Background technique [0002] At present, almost the entire urban space is shrouded in electromagnetic radiation, especially in public buildings, public places, working areas, and living and living areas. If materials with wave-absorbing properties are used in the building itself or in its space, it can not only effectively reduce the intensity of radiation by absorbing the electromagnetic radiation existing in the building space, but also improve the physical and mental effects of harmful radiation on the human body. , has certain practical value. At present, most of the indoor protective wave-absorbing materials for buildings are prepared by doping various wave-absorbing agents into matrix materials such as cement, gypsum, and concrete. [0003] At present, there are mainly t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B22/08
CPCC04B28/14C04B22/08C04B2111/00258C04B2201/50Y02W30/91
Inventor 邓道美
Owner 黄梅龙源石膏有限公司
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