Supercharge Your Innovation With Domain-Expert AI Agents!

A wave-absorbing composite board and its application

A composite board and composite material technology, applied in the field of electromagnetic wave-absorbing structures, can solve the problems of free space impedance matching imbalance, low electromagnetic wave absorption rate, single structural design, etc., and achieve good frost resistance and corrosion resistance, and compressive strength High, the effect of reducing resource waste

Active Publication Date: 2020-12-08
GUANGZHOU UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement-based wave-absorbing materials are generally made by directly adding some materials with electromagnetic wave absorption function to cement-based ordinary concrete, but the absorption rate of cement-based wave-absorbing materials for electromagnetic waves is low because the cement-based itself has a dense structure. , the porosity is low, it is easy to cause the impedance matching imbalance with the free space, causing most of the electromagnetic waves to be reflected on the surface of the cement-based wave-absorbing material, and the structural design of the cement-based wave-absorbing material in the building structure is single, usually single layer structure only

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A wave-absorbing composite board and its application
  • A wave-absorbing composite board and its application
  • A wave-absorbing composite board and its application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] The preparation method of the electromagnetic wave transmissive composite material comprises the following steps:

[0051] (1) prepare alkali activator: water, water glass and sodium hydroxide are mixed, stir, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=(45~55 ):1:2;

[0052] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir evenly to obtain a mixed ash body, then add an alkali activator, and stir evenly to obtain the first alkali-activated slag Cementitious material; by mass ratio, fly ash: slag = (7:5) ~ (10:3), mixed ash body: alkali activator = 1: (0.4 ~ 0.5);

[0053] (3) Sodium bicarbonate is added in the epoxy resin glue, stir evenly, obtain mixture A; According to mass volume ratio, sodium bicarbonate: epoxy resin glue=2~3g:20~30mL;

[0054] (4) Wash the expanded polystyrene particles with deionized water for 2-3 times, and then dry th...

Embodiment 1

[0068] Embodiment 1 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0069] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=50: 1:2;

[0070] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:3, mixed ash body: alkali activator=1:0.4;

[0071] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=1g:10mL;

[0072] (4) Wash the expanded polystyrene particles with deionized water ...

Embodiment 2

[0079] Embodiment 2 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0080] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=45: 1:2;

[0081] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:5, mixed ash body: alkali activator=1:0.45;

[0082] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=2g:30mL;

[0083] (4) Wash the expanded polystyrene particles with deionized water...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention disclosed a kind of absorbing composite board and its application.The electromagnetic wave loss layer includes electromagnetic wave loss composite materials.The electromagnetic wave transmission layer has a high electromagnetic wave transmission rate, which makes the electromagnetic wave easily incident into the inside of the suction composite board, and then consumes absorbed by the electromagnetic wave discharge layer., And consumes absorption by the electromagnetic wave loss layer.The absorbing composite board of the present invention has excellent electromagnetic wave absorption loss and mechanical performance, can meet the requirements of the building structure, used in the field of electromagnetic shielding, can achieve a good electromagnetic shielding effect, effectively prevent local electromagnetic leakage and outside the area outside the area.Electromagnetic invasion interference has good application prospects in the MRI system scanning room and other places.

Description

technical field [0001] The invention relates to an electromagnetic wave-absorbing structure, in particular to a wave-absorbing composite board and its application. Background technique [0002] With the development of science and technology and the improvement of human understanding, there are more and more ways to apply electromagnetic waves, and the scope is wider and wider. Nowadays, electromagnetic waves are widely used no matter in the field of communication, medical health or food hygiene. However, studies have shown that working and living under electromagnetic radiation conditions for a long time will cause harm to people's physical and mental health. In addition, electromagnetic radiation will interfere with electronic machines, cause malfunctions of electronic machines, affect the normal operation of the machine, and even cause serious accidents and hazards. It will also affect the reception of radio and television, cause information leakage, and cause serious inf...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B32B13/04B32B13/06B32B15/00C04B28/08C04B38/08C04B38/02C04B38/10E04B1/92
CPCB32B5/18B32B13/045B32B15/046B32B2307/212B32B2307/718B32B2419/00C04B20/023C04B28/08E04B1/92E04B2001/925C04B16/08C04B24/38C04B2103/42C04B18/08C04B18/141C04B22/002C04B22/062C04B12/04C04B38/10C04B18/027C04B38/08
Inventor 赵若红梅超徐安傅继阳刘爱荣吴玖荣
Owner GUANGZHOU UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com