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Lightweight gypsum board for absorbing electromagnetic radiation and preparation method thereof

A technology for absorbing electromagnetic waves and gypsum board, which is applied in the field of building materials, can solve the problems of unsatisfactory absorption of electromagnetic radiation, achieve good electromagnetic wave absorption performance, increase bending resistance, and relieve environmental pressure

Active Publication Date: 2018-11-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, building materials that absorb electromagnetic radiation have received more and more attention. The light gypsum boards that absorb electromagnetic radiation that currently exist on the market do not have an ideal effect on absorbing electromagnetic radiation, and cannot meet strict requirements on electromagnetic radiation and weight. place

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of lightweight gypsum board for absorbing electromagnetic wave radiation is prepared, and its raw material components and parts by weight are as follows:

[0024] 30 parts of phosphorus building gypsum, 15 parts of steel slag fine powder, 10 parts of copper slag, 2 parts of carbon fiber, 0.1 part of retarder (protein retarder for gypsum), 0.1 part of water reducer.

[0025] The specific preparation method is: add phosphorus building gypsum into the mixer, add water and stir for 2 minutes at a water-to-material ratio of 0.34, add retarder, water reducer, steel slag powder, copper slag, and carbon fiber in sequence during the stirring process, and inject the resulting slurry into Forming and curing in the forming mold, a new type of electromagnetic wave radiation-absorbing lightweight gypsum board can be obtained.

[0026] For the 1.5-5.4 GHz radio electromagnetic wave of the gypsum board prepared in this embodiment, the electromagnetic wave absorption rate of the ...

Embodiment 2

[0029] A kind of lightweight gypsum board for absorbing electromagnetic wave radiation is prepared, and its raw material components and parts by weight are as follows:

[0030] 50 parts of phosphorous building plaster, 30 parts of steel slag powder, 20 parts of copper slag, 8 parts of carbon fiber, 0.3 part of retarder (sodium polyphosphate), 0.3 part of water reducing agent, and 0.1 part of air-entraining agent.

[0031] The specific preparation method is: add phosphorus building gypsum into the mixer, add water and stir for 2 minutes at a water-to-material ratio of 0.34, and then add retarder, water reducing agent, air-entraining agent, steel slag micropowder, copper slag, and carbon fiber in sequence during the stirring process. The obtained slurry is poured into a molding mold for molding and maintenance, and a new type of electromagnetic wave radiation-absorbing lightweight gypsum board is obtained.

[0032] After testing, the impact resistance of the electromagnetic radi...

Embodiment 3

[0034] A kind of lightweight gypsum board for absorbing electromagnetic wave radiation is prepared, and its raw material components and parts by weight are as follows:

[0035] 40 parts of phosphorus building gypsum, 20 parts of steel slag powder, 25 parts of copper slag, 5 parts of carbon fiber, 0.2 part of retarder (protein retarder for gypsum), 0.2 part of water reducing agent, and 0.05 part of air-entraining agent.

[0036] The specific preparation method is: add phosphorus building gypsum into the mixer, add water and stir for 2 minutes at a water-to-material ratio of 0.34, and then add retarder, water reducing agent, air-entraining agent, steel slag micropowder, copper slag, and carbon fiber in sequence during the stirring process. The obtained slurry is poured into a molding mold for molding and maintenance, and a new type of electromagnetic wave radiation-absorbing lightweight gypsum board is obtained.

[0037] After testing, the impact resistance of the electromagneti...

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Abstract

The invention relates to a lightweight gypsum board for absorbing electromagnetic radiation and a preparation method thereof. The lightweight gypsum board comprises the following raw material components in parts by mass: 30-50 parts of building phosphogypsum, 15-30 parts of a steel slag micro powder, 10-40 parts of copper slag, 2-8 parts of carbon fibers, 0.1-0.3 part of a retarder, 0.1-0.3 part of a water reducing agent and 0-0.1 part of an air entraining agent. According to the lightweight gypsum board disclosed by the invention, the absorption of electromagnetic waves is realized by utilizing ferroelectric and other substances in the copper slag. In addition, the dielectric constant of the material is changed by utilizing the carbon fibers, and the electromagnetic wave absorption ability of the gypsum board is further improved. After the electromagnetic wave passes through the gypsum board, the intensity of the electromagnetic wave is obviously decreased, and the breaking strength and impact strength of the electromagnetic wav are increased. The prepared lightweight gypsum board has a high waste utilization rate and excellent electromagnetic wave absorption property at 1.5-5.4GHz, and various properties meet the GBT23451-2009 General Technical Requirements of Light Weight Panel used for Building Partition.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a lightweight gypsum board for absorbing electromagnetic wave radiation and a preparation method thereof. Background technique [0002] With the rapid development of information technology, mobile communications, computers, household appliances, etc. are rapidly popularized, and the operating frequency range is getting wider and wider. The clock frequency has reached above 4GHz. The wide popularization of household appliances and electronic equipment brings great convenience to people's life, but also brings unfavorable electromagnetic wave interference problems. [0003] Electromagnetic interference (EMI), or electromagnetic noise, is an invisible pollution that cannot be felt by the senses. Due to electromagnetic interference (EMI), it is not uncommon for electronic instruments to malfunction or even fail. Almost all information systems have EMI and ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/28C04B111/52
CPCC04B28/143C04B2111/28C04B2111/52C04B2201/50C04B18/142C04B18/144C04B14/386C04B24/14C04B2103/302C04B24/16C04B22/16
Inventor 马保国吴潇金子豪郅真真孙仲达
Owner WUHAN UNIV OF TECH
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