CN103013440A - High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof - Google Patents
High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof Download PDFInfo
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- CN103013440A CN103013440A CN2012105485902A CN201210548590A CN103013440A CN 103013440 A CN103013440 A CN 103013440A CN 2012105485902 A CN2012105485902 A CN 2012105485902A CN 201210548590 A CN201210548590 A CN 201210548590A CN 103013440 A CN103013440 A CN 103013440A
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- dielectric ceramic
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Abstract
The invention particularly relates to a high dielectric ceramic particle and metal sheet composite wave-absorbing material and a preparation method thereof, and belongs to the field of novel photoelectricity. The high dielectric ceramic particle and metal sheet composite wave-absorbing material consists of a metal sheet and a plurality of high dielectric ceramic particles, wherein a plurality of high dielectric ceramic particles are fixed on the square metal sheet in an embedding or adhering manner and are arranged into a high dielectric ceramic particle array; and the distance between any two adjacent high dielectric ceramic particles is equal. The preparation method comprises the following steps of: preparing high dielectric ceramic by a high temperature solid-phase reaction method or a chemical synthesis method and processing the high dielectric ceramic into the particles; and then fixing the high dielectric ceramic particles on the square metal sheet in an embedding or adhering manner and arranging the high dielectric ceramic particles into the high dielectric ceramic particle array so as to form the high dielectric ceramic particle and metal sheet composite wave-absorbing material. The high dielectric ceramic particle and metal sheet composite wave-absorbing material can completely adsorb waves by nearly 100 percent under a certain electromagnetic wave frequency; and the position of a perfect absorption peak can be regulated and controlled by regulating the size of the high dielectric particles and parameters such as dielectric constant and the like.
Description
Technical field
The present invention be more particularly directed to a kind of high dielectric ceramic particle and tinsel composite wave-suction material and preparation method thereof, belong to the novel photoelectric technical field.
Background technology
Along with the fast development of science and technology with electronic industry, the application of various electronicss is increasing.The life of popularizing to the modern of the electronic products such as TV, refrigerator, computer and mobile phone brings a many problem that can not be ignored---electromagnetic radiation that also brought simultaneously easily.Electromagnetic radiation source is almost hidden in each corner of ours at one's side, indoor various household electrical appliance and outdoor hi-line, substation, radio station, television station, hertzian wave launching tower and radar station etc., can produce the hertzian wave of different frequency during their work, these hertzian wave are hidden people at one's side invisible, colourless, tastelessly, are in for a long time in the environment of electromagnetic radiation seriously to damage our healthy.Absorbing material will shine its surperficial absorption of electromagnetic wave, be converted into the energy of other form such as heat energy, and electromagnetic radiation is eliminated to the harm of human body in the surface that therefore absorbing material can be overlayed on electrical equipment.Except bringing the harm to HUMAN HEALTH, electromagnetic radiation also can affect the normal operation of various electronicss, electromagnetic interference causes electronic and electrical equipment to break down can cause huge financial loss, absorbing material can be used for eliminating the electromagnetic interference between the electronic apparatus.In addition, absorbing material can also be used for military field, and protection weapons system and aircraft etc. are hidden pursuing and attacking of radar, reach the stealthy effect of hertzian wave.Absorbing material has caused countries in the world scholars' great attention based on above vital role at the people's livelihood, economy and national defence three aspects:.
Need to satisfy two conditions as absorbing material, at first, absorbing material will have as far as possible little in inhaling the ripple frequency range or be almost 0 surface albedo.Secondly, absorbing material can all be absorbed into and be mapped to its inner electromagnetic wave energy.Condition one has absorbing material to be almost 0 surface albedo, can make like this to incide its surperficial hertzian wave and all enter into absorbing material inside.When the effective dielectric constant of material surface equates fully with magnetic permeability, itself and freeboard reach impedance matching, just meeting is so that surface albedo is 0, traditional absorbing material can't the accuracy controlling surface effective dielectric constant and magnetic permeability, therefore can't reach perfect impedance matching with freeboard, causing surface albedo is not 0, and the present invention can be by regulating the size of high dielectric grain, shape, specific inductivity, the specific conductivity of metallic membrane, the distance of high dielectric grain and metallic membrane and the medium between them are regulated effective dielectric constant and the magnetic permeability on absorbing material surface, so that itself and freeboard reach near perfect impedance matching, finally obtain surface albedo near 0.Condition two makes the electromagnetic wave energy that enters into absorbing material inside all be sponged by dielectric loss and magnetic loss equal loss form, and is translated into the energy of other forms such as heat energy.Wherein surface albedo is R, and reflection parameters is S
11, R=| S
11|
2Transmissivity is T, and transmission parameters is S
21, T=| S
21|
2Specific absorption is A, A=1-R-T.
Summary of the invention
The object of the invention is to propose a kind of high dielectric ceramic particle and tinsel composite wave-suction material and preparation method thereof.With high dielectric grain and the tinsel absorbing material that is composited, the distance of size, shape, specific inductivity, the specific conductivity of tinsel, high dielectric grain and tinsel that can be by regulating high dielectric grain and effective dielectric constant and the magnetic permeability that the medium between them is regulated the absorbing material surface, so that itself and freeboard reach perfect impedance matching, obtaining surface albedo is 0, the existence of tinsel is so that Electromagnetic wave penetrating percentage is 0, and electromagnetic energy is fallen by completely consumed by dielectric loss and resonance loss etc. in absorbing material inside.The present invention can design optional frequency place specific absorption close to 100% absorbing material by actual demand.
A kind of high dielectric ceramic particle and tinsel composite wave-suction material, this material is by tinsel and a plurality of high dielectric ceramic granulometric composition, wherein a plurality of high dielectric ceramic particles are by inlaying or adhesion is fixed on the tinsel, be arranged in the high dielectric ceramic array of particles, wherein the spacing of any two adjacent high dielectric ceramic particles equates.
Described tinsel is copper sheet, aluminium flake, silver strip or gold plaque.
Described high dielectric ceramic is TiO
2Pottery, CaTiO
3Pottery, Ba
xSr
1-xTiO
3(x=0 ~ 1) pottery or Ba
xSr
1-xTiO
3(x=0 ~ 1) and MgO composite ceramics.
Described high dielectric ceramic particle be shaped as sphere, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
Described high dielectric ceramic particle is of a size of nm level, μ m level or mm level.
The preparation method of a kind of high dielectric ceramic particle and tinsel composite wave-suction material, its concrete steps are as follows:
(1) utilize the method for high-temperature solid phase reaction method or chemosynthesis to prepare high dielectric ceramic and be processed into particulate state.
(2) with the high dielectric ceramic particle by inlaying or adhesion is fixed on the tinsel, be arranged in the high dielectric ceramic array of particles, form high dielectric ceramic particle and tinsel composite wave-suction material.
Described tinsel is copper sheet, aluminium flake, silver strip or gold plaque.
Described high dielectric ceramic is TiO
2Pottery, CaTiO
3Pottery, Ba
xSr
1-xTiO
3(x=0 ~ 1) pottery or Ba
xSr
1-xTiO
3(x=0 ~ 1) and MgO composite ceramics.
Described high dielectric ceramic particle be shaped as sphere, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
Described high dielectric ceramic particle is of a size of nm level, μ m level or mm level.
Beneficial effect of the present invention is:
The present invention can reach near 100% perfection at certain wave frequency place and inhale ripple, and the parameters such as the size by regulating high dielectric grain and specific inductivity can be regulated and control the position of perfect absorption peak.
Description of drawings
Fig. 1 is composite wave-suction material synoptic diagram of the present invention;
Fig. 2 is Ba
0.5Sr
0.5TiO
3The reflection parameters S of absorbing material in frequency 8 GHz ~ 13 GHz scopes that is composited with MgO composite ceramics cubic block and copper film
11Curve;
Fig. 3 is the Ba of the different length of sides
0.5Sr
0.5TiO
3The reflection parameters S of absorbing material in frequency 5 GHz ~ 8 GHz scopes that pottery cubic block and copper film are composited
11Curve.
Embodiment
The invention provides a kind of high dielectric ceramic particle and tinsel composite wave-suction material and preparation method thereof, the present invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1
Utilize high-temperature solid phase reaction method to synthesize Ba
0.5Sr
0.5TiO
3Powder mixes magnesium oxide, utilizes ceramic size curtain coating technology, obtain certain thickness cast sheet, obtain fine and close ceramic plate by binder removal and sintering, ceramic plate is cut into the cubic block that length of side a is 2 mm, cubic block is periodically adhered on the Copper Foil, and its structure as shown in Figure 1.The black cubic block represents Ba
0.5Sr
0.5TiO
3With the MgO composite ceramic particle, the white metal sheet represents Copper Foil.Fig. 2 is Ba
0.5Sr
0.5TiO
3The reflection parameters S of absorbing material in frequency 8 GHz ~ 13 GHz scopes that is composited with MgO composite ceramics cubic block and copper film
11Curve (since the existence of copper film, transmission parameters S
21=0), as can be seen from the figure this matrix material has the absorption peak close to 100% at f=9.97 GHz.This is because the electric resonance of the magnetic resonance of cubic block particle and Copper Foil so that the effective dielectric constant of matrix material and magnetic permeability are equal at f=9.97 GHz places, finally causes the perfect absorption peak at this frequency place.
Embodiment 2
Utilize high-temperature solid phase reaction method to synthesize Ba
0.5Sr
0.5TiO
3Powder utilizes ceramic size curtain coating technology, obtains certain thickness cast sheet, obtain fine and close ceramic plate by binder removal and sintering, ceramic plate is cut into the cubic block that length of side a is 0.96 mm, periodically adhere to cubic block on the Copper Foil, its structure as shown in Figure 1, Ba
0.5Sr
0.5TiO
3The reflection parameters S of the absorbing material that cubic block and copper film are composited in frequency 5 GHz ~ 8 GHz scopes
11Curve (since the existence of copper film, transmission parameters S
21=0) see Fig. 3, as can be seen from the figure this matrix material has the absorption peak close to 100% at f=7.29 GHz.
Embodiment 3
Utilize high-temperature solid phase reaction method to synthesize Ba
0.5Sr
0.5TiO
3Powder utilizes ceramic size curtain coating technology, obtains certain thickness cast sheet, obtain fine and close ceramic plate by binder removal and sintering, ceramic plate is cut into the cubic block that length of side a is 1.02 mm, periodically adhere to cubic block on the Copper Foil, its structure as shown in Figure 1, Ba
0.5Sr
0.5TiO
3The reflection parameters S of the absorbing material that cubic block and copper film are composited in frequency 5 GHz ~ 8 GHz scopes
11Curve (since the existence of copper film, transmission parameters S
21=0) see Fig. 3, as can be seen from the figure this matrix material has the absorption peak close to 100% at f=6.88 GHz.
Claims (10)
1. a high dielectric ceramic particle and tinsel composite wave-suction material, it is characterized in that: this material is by tinsel and a plurality of high dielectric ceramic granulometric composition, wherein a plurality of high dielectric ceramic particles are by inlaying or adhesion is fixed on the tinsel, be arranged in the high dielectric ceramic array of particles, wherein the spacing of any two adjacent high dielectric ceramic particles equates.
2. composite wave-suction material according to claim 1, it is characterized in that: described tinsel is copper sheet, aluminium flake, silver strip or gold plaque.
3. composite wave-suction material according to claim 1, it is characterized in that: described high dielectric ceramic is TiO
2Pottery, CaTiO
3Pottery, Ba
xSr
1-xTiO
3(x=0 ~ 1) pottery or Ba
xSr
1-xTiO
3(x=0 ~ 1) and MgO composite ceramics.
4. composite wave-suction material according to claim 1 is characterized in that: described high dielectric ceramic particle be shaped as sphere, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
5. composite wave-suction material according to claim 1, it is characterized in that: described high dielectric ceramic particle is of a size of nm level, μ m level or mm level.
6. the preparation method of a high dielectric ceramic particle and tinsel composite wave-suction material is characterized in that concrete steps are as follows:
(1) utilize the method for high-temperature solid phase reaction method or chemosynthesis to prepare high dielectric ceramic and be processed into particulate state.
(2) with the high dielectric ceramic particle by inlaying or adhesion is fixed on the tinsel, be arranged in the high dielectric ceramic array of particles, form high dielectric ceramic particle and tinsel composite wave-suction material.
7. method according to claim 6, it is characterized in that: described tinsel is copper sheet, aluminium flake, silver strip or gold plaque.
8. method according to claim 6, it is characterized in that: described high dielectric ceramic is TiO
2Pottery, CaTiO
3Pottery, Ba
xSr
1-xTiO
3(x=0 ~ 1) pottery or Ba
xSr
1-xTiO
3(x=0 ~ 1) and MgO composite ceramics.
9. method according to claim 6 is characterized in that: described high dielectric ceramic particle be shaped as sphere, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
10. method according to claim 6, it is characterized in that: described high dielectric ceramic particle is of a size of nm level, μ m level or mm level.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015024241A1 (en) * | 2013-08-23 | 2015-02-26 | 华为技术有限公司 | Coaxial waveguide converter |
| CN104485502A (en) * | 2014-12-31 | 2015-04-01 | 清华大学 | Metamaterial harmonic oscillator based on dielectric resonator and application of metamaterial harmonic oscillator |
| CN104579278A (en) * | 2014-12-08 | 2015-04-29 | 清华大学 | Optical switching realization method based on Mie resonance |
| CN104902735A (en) * | 2015-05-07 | 2015-09-09 | 武汉理工大学 | High-temperature wave absorbing metamaterial and preparation method thereof |
| CN107807416A (en) * | 2017-11-16 | 2018-03-16 | 厦门大学 | A kind of high efficiency broadband mirrors based on isotropism ceramics metamaterial |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507354A (en) * | 1982-03-31 | 1985-03-26 | Nippon Carbon Co., Ltd. | Electromagnetic wave absorbers of silicon carbide fibers |
| JPH05280117A (en) * | 1992-02-27 | 1993-10-26 | Tokin Corp | Wave absorber |
| US5276448A (en) * | 1990-01-25 | 1994-01-04 | Naito Yoshuki | Broad-band wave absorber |
| JPH06132691A (en) * | 1992-10-21 | 1994-05-13 | Tomoegawa Paper Co Ltd | Radio wave absorber |
| US20010024121A1 (en) * | 2000-03-27 | 2001-09-27 | Tdk Corporation | Electromagnetic wave absorber |
| CN1599551A (en) * | 2004-08-30 | 2005-03-23 | 天津大学 | Circuit analog wave absorbing material using active carbon felt as absorbent and its preparation method |
| US20080053695A1 (en) * | 2006-09-05 | 2008-03-06 | Jae-Chul Choi | Electromagnetic wave absorber and method of constructing the same |
| CN101150217A (en) * | 2007-11-02 | 2008-03-26 | 清华大学 | Electric field-tunable negative magnetic permeability part based on ferroelectric ceramic grain and its making method |
| CN102523730A (en) * | 2011-11-18 | 2012-06-27 | 华南理工大学 | Structured wave-absorbing material and preparation method thereof |
| CN102709708A (en) * | 2012-06-28 | 2012-10-03 | 中国人民解放军国防科学技术大学 | Electromagnetic wave absorbing material with periodic structure, and preparation method thereof |
| CN102732210A (en) * | 2012-06-28 | 2012-10-17 | 中国人民解放军国防科学技术大学 | Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5280117B2 (en) * | 2008-06-27 | 2013-09-04 | Ｓｕｍｃｏ Ｔｅｃｈｘｉｖ株式会社 | Wafer holding jig and wafer processing apparatus |
-
2012
- 2012-12-17 CN CN201210548590.2A patent/CN103013440B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507354A (en) * | 1982-03-31 | 1985-03-26 | Nippon Carbon Co., Ltd. | Electromagnetic wave absorbers of silicon carbide fibers |
| US5276448A (en) * | 1990-01-25 | 1994-01-04 | Naito Yoshuki | Broad-band wave absorber |
| JPH05280117A (en) * | 1992-02-27 | 1993-10-26 | Tokin Corp | Wave absorber |
| JPH06132691A (en) * | 1992-10-21 | 1994-05-13 | Tomoegawa Paper Co Ltd | Radio wave absorber |
| US20010024121A1 (en) * | 2000-03-27 | 2001-09-27 | Tdk Corporation | Electromagnetic wave absorber |
| CN1599551A (en) * | 2004-08-30 | 2005-03-23 | 天津大学 | Circuit analog wave absorbing material using active carbon felt as absorbent and its preparation method |
| US20080053695A1 (en) * | 2006-09-05 | 2008-03-06 | Jae-Chul Choi | Electromagnetic wave absorber and method of constructing the same |
| CN101150217A (en) * | 2007-11-02 | 2008-03-26 | 清华大学 | Electric field-tunable negative magnetic permeability part based on ferroelectric ceramic grain and its making method |
| CN102523730A (en) * | 2011-11-18 | 2012-06-27 | 华南理工大学 | Structured wave-absorbing material and preparation method thereof |
| CN102709708A (en) * | 2012-06-28 | 2012-10-03 | 中国人民解放军国防科学技术大学 | Electromagnetic wave absorbing material with periodic structure, and preparation method thereof |
| CN102732210A (en) * | 2012-06-28 | 2012-10-17 | 中国人民解放军国防科学技术大学 | Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| A. J. MOULSON，等: "《电子陶瓷 材料•性能•应用》", 31 October 1993, article "电子陶瓷 材料•性能•应用" * |
| A. J. MOULSON，等: "《电子陶瓷 材料•性能•应用》", 31 October 1993, 武汉工业大学出版社 * |
| 孙建英，等: "低掺杂量MgO对钛酸锶钡陶瓷的结构和性能的影响", 《功能材料》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015024241A1 (en) * | 2013-08-23 | 2015-02-26 | 华为技术有限公司 | Coaxial waveguide converter |
| CN104813536A (en) * | 2013-08-23 | 2015-07-29 | 华为技术有限公司 | Coaxial waveguide converter |
| US9972881B2 (en) | 2013-08-23 | 2018-05-15 | Huawei Technologies Co., Ltd. | Coaxial line-to-waveguide adapter comprising a left-handed material used as an electromagnetic parameter adjusting component |
| CN104579278A (en) * | 2014-12-08 | 2015-04-29 | 清华大学 | Optical switching realization method based on Mie resonance |
| CN104579278B (en) * | 2014-12-08 | 2017-10-03 | 清华大学 | A kind of method for implementing optical switch based on Mie resonance |
| CN104485502A (en) * | 2014-12-31 | 2015-04-01 | 清华大学 | Metamaterial harmonic oscillator based on dielectric resonator and application of metamaterial harmonic oscillator |
| CN104902735A (en) * | 2015-05-07 | 2015-09-09 | 武汉理工大学 | High-temperature wave absorbing metamaterial and preparation method thereof |
| CN107807416A (en) * | 2017-11-16 | 2018-03-16 | 厦门大学 | A kind of high efficiency broadband mirrors based on isotropism ceramics metamaterial |
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| CN103013440B (en) | 2014-12-24 |
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