CN103903665A - Cement mortar wideband shielding/ microwave absorbing composite structure building material with metal net and electromagnetic function - Google Patents
Cement mortar wideband shielding/ microwave absorbing composite structure building material with metal net and electromagnetic function Download PDFInfo
- Publication number
- CN103903665A CN103903665A CN201410025168.8A CN201410025168A CN103903665A CN 103903665 A CN103903665 A CN 103903665A CN 201410025168 A CN201410025168 A CN 201410025168A CN 103903665 A CN103903665 A CN 103903665A
- Authority
- CN
- China
- Prior art keywords
- layer
- electromagnetic wave
- composite structure
- sand
- cement slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a cement mortar wideband shielding/ microwave absorbing composite structure building material with a metal net and an electromagnetic function. According to the cement mortar wideband shielding/ microwave absorbing composite structure building material with the metal net and the electromagnetic function, the metal net is embedded in cement mortar, microwave absorbing agents with different contents (the content can be zero, namely any microwave absorbing agent is not added) are mixed at different thickness positions of cement mortar, and electromagnetic wave conversion layers and electromagnetic wave absorbing layers are formed respectively. The cement mortar wideband shielding/ microwave absorbing composite structure building material with the metal net and the electromagnetic function has the advantage of being strong in shielding and microwave absorbing.
Description
Technical field
The present invention relates to a kind of sand-cement slurry wideband with wire netting and shield/inhale ripple composite structure function solenoid building materials, the function solenoid building materials of this structure has bandwidth, the strong feature of shielding/suction ripple.
Background technology
Along with socioeconomic development, the especially great-power electromagnetic radiation device fast development of various electromagnetic radiation equipment, as electric power transmission line and transformer station, wireless communication transmitting station, electric railway etc.Along with cities and towns closeness is more and more higher, these great-power electromagnetic radiation devices are inevitably more and more nearer with building, thereby indoor electromagnetic environmental pollution is progressively aggravated.For electromagnetic radiation pollution problem, propose to adopt the cement based function solenoid building materials that mixes graphite, carbon fiber, steel fibre etc. electromagnetic wave is shielded and absorb.But the working frequency range of this cement based function solenoid building materials is microwave frequency band, also helpless to the protection of low frequency, great-power electromagnetic radiation device.Metal mesh opening is a kind of conventional electromagnetic screen means, it depends on mesh aperture and wire diameter to different frequency range shielding electromagnetic waves usefulness, based on this feature, on the basis of cement based function solenoid building materials, add metal mesh opening, can realize low frequency, great-power electromagnetic radiation device shielding electromagnetic waves and absorption.
Summary of the invention
For solving the deficiency in prior art, the present invention proposes a kind of sand-cement slurry wideband with wire netting and shield/inhale ripple composite structure.It is by the following technical solutions:
A kind of sand-cement slurry wideband shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: wire netting embeds in sand-cement slurry, form respectively electromagnetic wave transform layer and electromagnetic wave absorbing layer and with respect to body of wall electromagnetic wave transform layer outside for outer, electromagnetic wave absorbing layer interior be internal layer; The embedded location of wire netting is in rubber-ferrite layer, in electromagnetic wave transform layer, or simultaneously in electromagnetic wave transform layer, rubber-ferrite layer, or between electromagnetic wave transform layer, rubber-ferrite layer.
Further, described electromagnetic wave transform layer, in the time needing the environment electromagnetics wave energy of shielding/absorb to account for more than 90% spectrum component to be less than 100MHz, its thickness is 2cm～3cm; While being greater than 100MHz, its thickness is 0.1cm～2cm.
Further, described rubber-ferrite layer, in the time needing the environment electromagnetics wave energy of shielding/absorb to account for more than 90% spectrum component to be less than 100MHz, its thickness is 2.5cm～5cm; While being greater than 100MHz, its thickness is 0.5cm～2.5cm.
Further, described electromagnetic wave transform layer and electromagnetic wave absorbing layer also mix wave absorbing agent.
Further, mixing from skin to internal layer of wave absorbing agent increases gradually.
Further, in the time adopting graphite as wave absorbing agent, the mass percentage content scope that electromagnetic wave transform layer mixes is 0～5%, and the content range that rubber-ferrite layer mixes is 1%～15%.
Further, the content of wave absorbing agent is identical in identical bed thickness position.
Further, the aperture of wire netting is 0.5cm～50cm, and the wire diameter of wire netting is 0.01cm～1cm.
Based on the above, the wave absorbing agent content (can be 0) that mix ground floor and second layer different-thickness position draws according to the electromagnetic wave band limits actual computation of shielding/absorption.Wire netting is parallel to body of wall and places.
The present invention is on the basis of cement based function solenoid building materials, utilize the metal mesh opening different pore size size principle different to different frequency electromagnetic shielding effectiveness with different metal filament diameter, by the wire netting of certain pore size being embedded in cement based function solenoid building materials, reach at original microwave frequency band and inhale on the basis of ripple, increase the object to low-frequency electromagnetic wave shielding and absorption.
Accompanying drawing explanation
Fig. 1 (a) is shielding/suction ripple composite structure schematic diagram
Fig. 1 (b) is shielding/suction ripple composite structure electromagnetic wave shielding (metal mesh opening) schematic diagram
Fig. 2 is that pore size is the result of calculation figure of 1cm～50cm wire netting to different frequency electromagnetic shielding effectiveness
Fig. 3 is that pore size is the result of calculation figure of 1cm～25cm wire netting to different frequency electromagnetic shielding effectiveness
Fig. 4 is that the sand-cement slurry wideband of the band wire netting (pore size is 15cm) of actual preparation shields/inhale ripple composite structure function solenoid building materials shield effectiveness test result figure
Fig. 5 is that pore size is the result of calculation figure of 0.5cm～5cm wire netting to different frequency electromagnetic shielding effectiveness
Embodiment
1. shield/inhale with the sand-cement slurry wideband of wire netting the sand-cement slurry wideband that ripple composite structure comprises wire netting and shield/inhale ripple function solenoid building materials, wire netting embeds in sand-cement slurry, in sand-cement slurry, the wave absorbing agent of different content is mixed in different-thickness position, form respectively electromagnetic wave transform layer and electromagnetic wave absorbing layer, as shown in Fig. 1 (a).Ground floor electromagnetic wave transform layer and second layer electromagnetic wave absorbing layer are sand-cement slurry, do not add any wave absorbing agent, and ground floor electromagnetic wave transform layer and second layer electro-magnetic wave absorption layer thickness be 4cm altogether.Wire netting is selected steel wire, and embedded location is first and second layer of centre, mesh aperture 40cm, and wire diameter 0.5cm, as shown in Fig. 1 (b).Fig. 2 is the result of calculation figure of different pore size wire netting to different frequency electromagnetic shielding effectiveness, in the time of mesh aperture 40cm, its shield effectiveness to low-frequency electromagnetic waves such as the radio broadcastings below 30MHz is more than 10.81dB, is below 0.05dB to microwave frequency band shielding electromagnetic waves usefulness such as the above mobile communication of 900MHz.This shielding/suction ripple composite structure function solenoid building materials is applicable to the building near high power low-frequency electromagnetic radiation equipment, need to there is shield effectiveness more than 10dB to the low frequency electromagnetic radiation below 30MHz, but not shield/absorb the electromagnetic situation of mobile communication frequency range.
2. shield/inhale with the sand-cement slurry wideband of wire netting the sand-cement slurry wideband that ripple composite structure comprises wire netting and shield/inhale ripple function solenoid building materials, wire netting embeds in sand-cement slurry, in sand-cement slurry, the wave absorbing agent of different content is mixed in different-thickness position, form respectively electromagnetic wave transform layer and electromagnetic wave absorbing layer, as shown in Fig. 1 (a).Ground floor electromagnetic wave transform layer and the substrate of second layer electromagnetic wave absorbing layer are sand-cement slurry, and ground floor electromagnetic wave transform layer thickness 1cm, act as impedance matching, add the content of graphite (wave absorbing agent) to increase gradually Zi outer to internal layer, and scope is 0.1%～0.5%.Second layer electro-magnetic wave absorption layer thickness is 3cm, act as electromagnetic wave absorption, adds the content of graphite (wave absorbing agent) to increase gradually Zi outer to internal layer, and its content range is 0.5～5%.Wire netting is selected steel wire, embedded location in the middle of the second layer, mesh aperture 15cm, wire diameter 0.1cm, as shown in Fig. 1 (b).Fig. 3 is the result of calculation figure of different pore size wire netting to different frequency electromagnetic shielding effectiveness, in the time of mesh aperture 15cm, its shield effectiveness to low-frequency electromagnetic waves such as the radio broadcastings below 30MHz is more than 20.41dB, is below 0.5dB to microwave frequency band shielding electromagnetic waves usefulness such as the above mobile communication of 900MHz.Electromagnetic wave transform layer and electromagnetic wave absorbing layer all add a certain amount of graphite, make this shielding/suction ripple composite structure function solenoid building materials be applicable to the building near high power low-frequency electromagnetic radiation equipment, need to there is shield effectiveness more than 20dB to the low frequency electromagnetic radiation below 30MHz, and mobile communication frequency range electromagnetic wave be had to the situation of certain suction ripple usefulness.Fig. 4 is that the sand-cement slurry wideband of the band wire netting (pore size is 15cm) of actual preparation shields/inhale ripple composite structure function solenoid building materials shield effectiveness test result figure.
3. shield/inhale with the sand-cement slurry wideband of wire netting the sand-cement slurry wideband that ripple composite structure comprises wire netting and shield/inhale ripple function solenoid building materials, wire netting embeds in sand-cement slurry, in sand-cement slurry, the wave absorbing agent of different content is mixed in different-thickness position, form respectively electromagnetic wave transform layer and electromagnetic wave absorbing layer, as shown in Fig. 1 (a).Ground floor electromagnetic wave transform layer and the substrate of second layer electromagnetic wave absorbing layer are sand-cement slurry, and ground floor electromagnetic wave transform layer thickness 1cm, act as impedance matching, add the content of graphite (wave absorbing agent) to increase gradually Zi outer to internal layer, and scope is 0.1%～1%.Second layer electro-magnetic wave absorption layer thickness is 2cm, act as electromagnetic wave absorption, adds the content of graphite (wave absorbing agent) to increase gradually Zi outer to internal layer, and its content range is 1～10%.Wire netting is selected steel wire, embedded location in the middle of the second layer, mesh aperture 1.2cm, wire diameter 0.05cm, as shown in Fig. 1 (b).Fig. 4 is the result of calculation figure of different pore size wire netting to different frequency electromagnetic shielding effectiveness, and in the time of mesh aperture 1.2cm, it is more than 10.69dB to microwave frequency band shielding electromagnetic waves usefulness such as 900MHz～2600MHz mobile communication.Electromagnetic wave transform layer and electromagnetic wave absorbing layer all add a certain amount of graphite, this shielding/suction ripple composite structure function solenoid building materials is applicable to away from high power low-frequency electromagnetic radiation equipment, but near mobile communication base station, especially the just situation of the main transmit direction to antenna of mobile communication base station, need to and inhale ripple usefulness to microwave frequency band shielding electromagnetic waves usefulness such as 900MHz～2600MHz mobile communication and be situation more than 10dB.
Claims (8)
1. a sand-cement slurry wideband shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: wire netting embeds in sand-cement slurry, form respectively electromagnetic wave transform layer and electromagnetic wave absorbing layer and with respect to body of wall electromagnetic wave transform layer outside for outer, electromagnetic wave absorbing layer interior be internal layer; The embedded location of wire netting is in rubber-ferrite layer, in electromagnetic wave transform layer, or simultaneously in electromagnetic wave transform layer, rubber-ferrite layer, or between electromagnetic wave transform layer, rubber-ferrite layer.
2. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: described electromagnetic wave transform layer, in the time needing the environment electromagnetics wave energy of shielding/absorb to account for more than 90% spectrum component to be less than 100MHz, its thickness is 2cm～3cm; While being greater than 100MHz, its thickness is 0.1cm～2cm.
3. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: described rubber-ferrite layer, in the time needing the environment electromagnetics wave energy of shielding/absorb to account for more than 90% spectrum component to be less than 100MHz, its thickness is 2.5cm～5cm; While being greater than 100MHz, its thickness is 0.5cm～2.5cm.
4. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that described electromagnetic wave transform layer and electromagnetic wave absorbing layer also mix wave absorbing agent.
5. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: mixing from skin to internal layer of wave absorbing agent increases gradually.
6. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: in the time adopting graphite as wave absorbing agent, the mass percentage content scope that electromagnetic wave transform layer mixes is 0～5%, and the content range that rubber-ferrite layer mixes is 1%～15%.
7. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: the content of wave absorbing agent is identical in identical bed thickness position.
8. sand-cement slurry wideband according to claim 1 shields/inhales ripple composite structure function solenoid building materials, it is characterized in that: the aperture of wire netting is 0.5cm～50cm, and the wire diameter of wire netting is 0.01cm～1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025168.8A CN103903665B (en) | 2014-01-20 | 2014-01-20 | Cement mortar wideband shielding/ microwave absorbing composite structure building material with metal net and electromagnetic function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025168.8A CN103903665B (en) | 2014-01-20 | 2014-01-20 | Cement mortar wideband shielding/ microwave absorbing composite structure building material with metal net and electromagnetic function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103903665A true CN103903665A (en) | 2014-07-02 |
| CN103903665B CN103903665B (en) | 2017-04-19 |
Family
ID=50994938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410025168.8A Active CN103903665B (en) | 2014-01-20 | 2014-01-20 | Cement mortar wideband shielding/ microwave absorbing composite structure building material with metal net and electromagnetic function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103903665B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275106A (en) * | 2015-11-05 | 2016-01-27 | 中国建筑材料科学研究总院 | Anti-electromagnetic radiation building |
| CN106760032A (en) * | 2016-12-13 | 2017-05-31 | 中国建筑材料科学研究总院 | Wall body structure and building |
| CN106760001A (en) * | 2016-11-23 | 2017-05-31 | 中国建筑材料科学研究总院 | Outer wall structure of building |
| CN111857421A (en) * | 2020-07-14 | 2020-10-30 | 北海翰博士科技有限公司 | Wear-resisting type touch panel with metal mesh on surface |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645783A (en) * | 1992-07-21 | 1994-02-18 | Osaka Gas Co Ltd | Matched type radio wave absorbent |
| JPH07105611B2 (en) * | 1990-04-27 | 1995-11-13 | 日本碍子株式会社 | Manufacturing method of radio wave absorption panel |
| JPH0972020A (en) * | 1995-09-07 | 1997-03-18 | Kajima Corp | Electric wave absorbing wall |
| CN1721357A (en) * | 2004-07-12 | 2006-01-18 | 西南科技大学 | Cement based composite materials with electromagnetic screen function |
| CN101033125A (en) * | 2007-02-05 | 2007-09-12 | 武汉理工大学 | Cement base composite construction materials capable of absorbing microwave |
| CN101386721A (en) * | 2008-10-28 | 2009-03-18 | 中国建筑材料科学研究总院 | Putty with electromagnetic wave absorption function |
| CN202347721U (en) * | 2011-08-05 | 2012-07-25 | 刘学文 | Explosion proof and wave-absorbing cement-fiber board |
| CN102976683A (en) * | 2012-12-10 | 2013-03-20 | 常熟建工建设集团有限公司苏州分公司 | Cement matrix wave-absorbing construction material |
| CN203129427U (en) * | 2013-03-15 | 2013-08-14 | 哈尔滨理工大学 | Radiation-resistant light thermal-insulation wallboard |
| CN103359997A (en) * | 2013-02-04 | 2013-10-23 | 青岛理工大学 | Nano foamed concrete, reinforced insulation wallboard and preparation method of reinforced insulation wallboard |
-
2014
- 2014-01-20 CN CN201410025168.8A patent/CN103903665B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07105611B2 (en) * | 1990-04-27 | 1995-11-13 | 日本碍子株式会社 | Manufacturing method of radio wave absorption panel |
| JPH0645783A (en) * | 1992-07-21 | 1994-02-18 | Osaka Gas Co Ltd | Matched type radio wave absorbent |
| JPH0972020A (en) * | 1995-09-07 | 1997-03-18 | Kajima Corp | Electric wave absorbing wall |
| CN1721357A (en) * | 2004-07-12 | 2006-01-18 | 西南科技大学 | Cement based composite materials with electromagnetic screen function |
| CN101033125A (en) * | 2007-02-05 | 2007-09-12 | 武汉理工大学 | Cement base composite construction materials capable of absorbing microwave |
| CN101386721A (en) * | 2008-10-28 | 2009-03-18 | 中国建筑材料科学研究总院 | Putty with electromagnetic wave absorption function |
| CN202347721U (en) * | 2011-08-05 | 2012-07-25 | 刘学文 | Explosion proof and wave-absorbing cement-fiber board |
| CN102976683A (en) * | 2012-12-10 | 2013-03-20 | 常熟建工建设集团有限公司苏州分公司 | Cement matrix wave-absorbing construction material |
| CN103359997A (en) * | 2013-02-04 | 2013-10-23 | 青岛理工大学 | Nano foamed concrete, reinforced insulation wallboard and preparation method of reinforced insulation wallboard |
| CN203129427U (en) * | 2013-03-15 | 2013-08-14 | 哈尔滨理工大学 | Radiation-resistant light thermal-insulation wallboard |
Non-Patent Citations (5)
| Title |
|---|
| 冀志江 等: "石墨为吸收剂水泥基膨胀珍珠岩砂浆吸波性能研究", 《材料科学与工艺》, vol. 19, no. 2, 30 April 2011 (2011-04-30) * |
| 崔升 等: "电磁屏蔽和吸波材料的研究进展", 《电子元件与材料》 * |
| 王永利 等: "电缆屏蔽金属网屏蔽效能的工程计算", 《航天控制》 * |
| 范新 等: "《防护工程的技术进步》", 31 May 2008, article "防护工程的技术进步" * |
| 邹田春 等: "吸波材料吸波性能的计算及其优化设计", 《功能材料》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275106A (en) * | 2015-11-05 | 2016-01-27 | 中国建筑材料科学研究总院 | Anti-electromagnetic radiation building |
| CN106760001A (en) * | 2016-11-23 | 2017-05-31 | 中国建筑材料科学研究总院 | Outer wall structure of building |
| CN106760032A (en) * | 2016-12-13 | 2017-05-31 | 中国建筑材料科学研究总院 | Wall body structure and building |
| CN111857421A (en) * | 2020-07-14 | 2020-10-30 | 北海翰博士科技有限公司 | Wear-resisting type touch panel with metal mesh on surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103903665B (en) | 2017-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103903665A (en) | Cement mortar wideband shielding/ microwave absorbing composite structure building material with metal net and electromagnetic function | |
| CN102157778B (en) | Method and device for realizing SAR (Specific Absorption Rate) control | |
| Micheli et al. | Shielding effectiveness of carbon nanotube reinforced concrete composites by reverberation chamber measurements | |
| CN103825108A (en) | Mobile phone terminal MIMO antenna structure applied to multiple modes and multiple bands | |
| CN108054491A (en) | Antenna system and mobile terminal | |
| Antonini et al. | Shielding effects of reinforced concrete structures to electromagnetic fields due to GSM and UMTS systems | |
| Hossain et al. | Application of auxiliary antenna elements for SAR reduction in the human head | |
| CN102637949A (en) | Double-frequency terahertz wave antenna with double-dipole structure | |
| Ali et al. | Design and comparison of two types of antennas for SAR calculation in wireless applications | |
| Pastore et al. | Advanced concrete materials for EMI reduction in protected environment and IEMI threats suppression | |
| Li et al. | Design and preparation of double-layer iron ore tailings cement-based electromagnetic wave absorbing materials containing carbon black and steel fiber | |
| CN102724857A (en) | Electromagnetic wave absorbing structure | |
| Roberts et al. | Diffraction from Frequency Selective Surfaces for secure building applications | |
| Kuther et al. | Radiation effect of fractal sierpinski square patch antenna | |
| JP2014187134A (en) | Electromagnetic wave absorber | |
| CN203760679U (en) | MIMO antenna structure suitable for multi-mode multi-band mobile phone terminal | |
| WO2020034683A1 (en) | Antenna element and antenna system | |
| Hristov et al. | Improving indoor signal coverage by use of through-wall passive repeaters | |
| CN102723611A (en) | Pinpoint patch loaded magnetic absorbing structure | |
| CN101386507A (en) | Electro-magnetism proof cement mortar material and preparation method thereof | |
| Kim et al. | Development of electromagnetic wave absorbing/shielding construction materials | |
| JP2006253283A (en) | Electromagnetic shielding wire-through mechanism of cable | |
| CN205320456U (en) | Electromagnetic wave absorbs board | |
| Atenaga et al. | Assessment of Radiated Electromagnetic Waves from Base Station Antennas using Calculation and Field Measurement Techniques | |
| Zhang | Analysis of antenna radiation characteristics in mine tunnels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |