Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-layer cement-based wave-absorbing material with adjustable wave-absorbing performance and application method of double-layer cement-based wave-absorbing material

A technology of wave absorbing material and wave absorbing performance, which is applied in the field of double-layer cement-based wave absorbing material, can solve the problems such as the wave absorbing performance of cement-based material can not meet the actual demand, the electromagnetic environment is complicated and fixed, and the application field can be broadened. and value, improving the absorbing frequency band, and the effect of flexible regulation

Active Publication Date: 2021-07-06
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement-based absorbing materials prepared by traditional methods, once prepared, the absorbing properties of cement-based materials will remain unchanged
In the actual application process, the external electromagnetic environment is complex
When the external electromagnetic environment changes, the absorbing performance of cement-based materials will not meet the actual needs
At present, patents on adjustable double-layer cement-based absorbing materials are still very rare

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
  • Double-layer cement-based wave-absorbing material with adjustable wave-absorbing performance and application method of double-layer cement-based wave-absorbing material
  • Double-layer cement-based wave-absorbing material with adjustable wave-absorbing performance and application method of double-layer cement-based wave-absorbing material
  • Double-layer cement-based wave-absorbing material with adjustable wave-absorbing performance and application method of double-layer cement-based wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment adopts cement-based material, glass fiber tube and nano-Fe 3 o 4 Ferrofluid is used as the main raw material, and the specific preparation methods include:

[0026] (1) Nano-Fe 3 o 4 The magnetic fluid is injected into the glass fiber tube, and then sealed with resin for standby;

[0027] (2) Dry-mix the vitrified microbeads and cement for 3 minutes; then add water and stir to obtain an impedance matching layer; wherein the amount of vitrified microbeads is 10%, and the water-cement ratio is 0.35;

[0028] (3) First dry mix cement and carbon powder for 3 minutes; then prepare the absorption layer according to the preparation process of standard mortar, in which the amount of single-stage sand (1.5-2.5mm) is 300%, the amount of carbon powder is 3%, and the water-cement ratio is 0.4;

[0029] (4) Using the layered casting method, first pour the absorbing layer 20mm, and then pour the impedance matching layer 10mm to obtain a double-layer cement-based ...

Embodiment 2

[0031] This embodiment adopts cement-based material, glass fiber tube and nano-Fe 3 o 4 Ferrofluid is used as the main raw material, and the specific preparation methods include:

[0032] (1) Nano-Fe 3 o 4 The magnetic fluid is injected into the glass fiber tube, and then sealed with resin for standby;

[0033] (2) Dry-mix the vitrified microbeads and cement for 3 minutes; then add water and stir to obtain an impedance matching layer; wherein the amount of vitrified microbeads is 10%, and the water-cement ratio is 0.35;

[0034] (3) First dry mix cement and carbon powder for 3 minutes; then prepare the absorption layer according to the preparation process of standard mortar, in which the amount of single-stage sand (1.5-2.5mm) is 300%, the amount of carbon powder is 3%, and the water-cement ratio is 0.4;

[0035] (4) Using the method of layered casting, first pour the absorbing layer 10mm, and then pour the impedance matching layer 20mm, to obtain a double-layer cement-ba...

Embodiment 3

[0037] This embodiment adopts cement-based material, glass fiber tube and nano-Fe 3 o 4 Ferrofluid is used as the main raw material, and the specific preparation methods include:

[0038] (1) Nano-Fe 3 o 4 The magnetic fluid is injected into the glass fiber tube, and then sealed with resin for standby;

[0039] (2) dry-mix the vitrified microbeads and cement for 3 minutes; then add water and stir to obtain an impedance matching layer; wherein the amount of vitrified microbeads is 5%, and the water-cement ratio is 0.35;

[0040] (3) First dry mix cement and carbon powder for 3 minutes; then prepare the absorption layer according to the preparation process of standard mortar, in which the amount of single-stage sand (1.5-2.5mm) is 300%, the amount of carbon powder is 3%, and the water-cement ratio is 0.4;

[0041] (4) Using the method of layered casting, first pour the absorbing layer 10mm, and then pour the impedance matching layer 20mm, to obtain a double-layer cement-bas...

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

PropertyMeasurementUnit
viscosityaaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of functional building materials, and discloses a preparation method of an adjustable double-layer cement-based wave-absorbing material. The adjustable cement-based wave-absorbing material is mainly composed of a double-layer cement-based material, a wave-transparent tube, a Fe3O4 magnetic fluid and an external magnetic field device. An external magnetic field acts on the double-layer cement-based wave-absorbing material containing the Fe3O4 magnetic fluid wave-transparent tube, and the existence form of the Fe3O4 magnetic fluid in the wave-transparent tube is changed, so that electromagnetic parameters in the cement-based wave-absorbing material are changed, and finally the purpose of flexibly regulating and controlling the wave-absorbing performance of the cement-based material is achieved. The preparation method is simple and practical, the obtained controllable double-layer cement-based wave-absorbing material improves the characteristic that a traditional cement-based wave-absorbing material cannot be changed once being formed, and the application field and range of the cement-based wave-absorbing material are further widened. In the actual application process, when the external electromagnetic environment is changed, only the adjustable double-layer cement-based material can meet the actual requirements.

Description

technical field [0001] The invention belongs to the field of functional building materials, and in particular relates to a double-layer cement-based wave-absorbing material with adjustable wave-absorbing performance and an application method thereof. Background technique [0002] As the carrier of information transmission, electromagnetic wave is an important transmission medium. With the rapid development of electronic information technology, electromagnetic waves have been widely used in various fields, such as telephones, computers, microwave ovens, satellites, radars, etc. The wide application of electromagnetic waves has greatly improved people's quality of life. However, the existence of a large number of electromagnetic waves is not only harmful to human health, but the excess electromagnetic waves can also interfere with the operation of precision instruments. In addition, electromagnetic leakage also seriously affects personal privacy and national security. There...

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 Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00258C04B14/24C04B14/42C04B14/308C04B14/022
Inventor 李方贤任蒙蒙余其俊韦江雄胡捷张同生黄浩良
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com