CN103013440B - 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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- CN103013440B CN103013440B CN201210548590.2A CN201210548590A CN103013440B CN 103013440 B CN103013440 B CN 103013440B CN 201210548590 A CN201210548590 A CN 201210548590A CN 103013440 B CN103013440 B CN 103013440B
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- high dielectric
- dielectric ceramic
- ceramic particle
- metal sheet
- composite wave
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- 239000000919 ceramic Substances 0.000 title claims abstract description 66
- 239000002245 particle Substances 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000011358 absorbing material Substances 0.000 title abstract description 27
- 239000002184 metal Substances 0.000 title abstract 8
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000003746 solid phase reaction Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 230000005622 photoelectricity Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- 229910001361 White metal Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010969 white metal Substances 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Compositions Of Oxide Ceramics (AREA)
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 field of novel photoelectricity.
Background technology
Along with science and technology and the fast development of electronic industry, the application of various electronics is increasing.The popularizing to bring to the life of modern of the electronic products such as TV, refrigerator, computer and mobile phone manyly simultaneously also brings a problem that can not be ignored easily---electromagnetic radiation.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, electromagnetic radiation tower and radar station etc., the hertzian wave of different frequency can be produced 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 and can seriously damage our healthy.Absorbing material will be irradiated to the absorption of electromagnetic wave on its surface, be converted into the energy of other forms such as heat energy, therefore absorbing material can be overlayed on the surface of electrical equipment to eliminate the harm of electromagnetic radiation to human body.Except bringing except harm to HUMAN HEALTH, electromagnetic radiation also can affect the normal operation of various electronics, electromagnetic interference causes electronic and electrical equipment to break down can cause huge financial loss, absorbing material can be used for the electromagnetic interference eliminated between electronic apparatus.In addition, absorbing material can also be used for military field, and pursuing and attacking of the protection evading radar such as weapons system and aircraft, reaches the effect that hertzian wave is stealthy.Absorbing material, based on above vital role in the people's livelihood, economy and national defence three, causes the great attention of countries in the world scholar.
As absorbing material demand fulfillment two conditions, first, absorbing material inhale in ripple frequency range to have little as far as possible or be almost 0 surface albedo.Secondly, absorbing material can all be absorbed into the electromagnetic wave energy being mapped to its inside.Condition one makes absorbing material have to be almost the surface albedo of 0, and the hertzian wave inciding its surface can be made so all to enter into absorbing material inside.When the effective dielectric constant of material surface and magnetic permeability complete equal time, itself and freeboard reach impedance matching, surface albedo just can be made to be 0, traditional absorbing material cannot the effective dielectric constant on accuracy controlling surface and magnetic permeability, therefore perfect impedance matching cannot be reached with freeboard, surface albedo is caused not to be 0, and the present invention can 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 regulate effective dielectric constant and the magnetic permeability on absorbing material surface, itself and freeboard is made to reach close to perfect impedance matching, finally obtain surface albedo close to 0.Condition two makes the electromagnetic wave energy entering 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|
2.Transmissivity is T, and transmission parameters is S
21, T=| S
21|
2.Specific 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.Be composited high dielectric grain and tinsel absorbing material, can by effective dielectric constant and the magnetic permeability regulating the specific conductivity of the size of high dielectric grain, shape, specific inductivity, tinsel, high dielectric grain and the distance of tinsel and the medium between them to regulate absorbing material surface, itself and freeboard is made to reach perfect impedance matching, obtaining surface albedo is 0, the existence of tinsel makes Electromagnetic wave penetrating percentage be 0, and electromagnetic energy is completely consumed by dielectric loss and resonance loss etc. in absorbing material inside.The present invention can by actual demand design optional frequency place specific absorption close to 100% absorbing material.
A kind of high dielectric ceramic particle and tinsel composite wave-suction material, this material is made up of tinsel and multiple high dielectric ceramic particle, wherein multiple high dielectric ceramic particle is by inlay or adhesion is fixed on tinsel, be arranged in high dielectric ceramic particle array, wherein the spacing of any two adjacent high dielectric ceramic particle is equal.
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.
The shape of described high dielectric ceramic particle is spherical, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
Described high dielectric ceramic particle is of a size of nm level, μm level or mm level.
A preparation method for high dielectric ceramic particle and tinsel composite wave-suction material, its concrete steps are as follows:
(1) method of high-temperature solid phase reaction method or chemosynthesis is utilized to prepare high dielectric ceramic and be processed into particulate state.
(2) by high dielectric ceramic particle by inlay or adhesion is fixed on tinsel, be arranged in high dielectric ceramic particle array, 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.
The shape of described high dielectric ceramic particle is spherical, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
Described high dielectric ceramic particle is of a size of nm level, μm level or mm level.
Beneficial effect of the present invention is:
The perfection that the present invention can be able to reach at certain wave frequency place close to 100% inhales ripple, by the position regulating the parameters such as the size of high dielectric grain and specific inductivity can regulate and control perfect absorption peak.
Accompanying drawing explanation
Fig. 1 is composite wave-suction material schematic diagram of the present invention;
Fig. 2 is Ba
0.5sr
0.5tiO
3with the reflection parameters S of absorbing material within the scope of frequency 8 GHz ~ 13 GHz that MgO composite ceramics cubic block and copper film are composited
11curve;
Fig. 3 is the Ba of the different length of side
0.5sr
0.5tiO
3the reflection parameters S of absorbing material within the scope of frequency 5 GHz ~ 8 GHz 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, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment 1
High-temperature solid phase reaction method is utilized to synthesize Ba
0.5sr
0.5tiO
3powder, mixes magnesium oxide, utilizes ceramic size casting 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, periodically adhere on Copper Foil by cubic block, its structure as shown in Figure 1.Black cubic block represents Ba
0.5sr
0.5tiO
3with MgO composite ceramic particle, white metal sheet represents Copper Foil.Fig. 2 is Ba
0.5sr
0.5tiO
3with the reflection parameters S of absorbing material within the scope of frequency 8 GHz ~ 13 GHz that MgO composite ceramics cubic block and copper film are composited
11curve (due to the existence of copper film, transmission parameters S
21=0), as can be seen from the figure this matrix material has absorption peak close to 100% at f=9.97 GHz.This is because the magnetic resonance of cubic block particle and the electric resonance of Copper Foil make the effective dielectric constant of matrix material equal at GHz place, f=9.97 with magnetic permeability, finally causes the perfect absorption peak at this frequency place.
Embodiment 2
High-temperature solid phase reaction method is utilized to synthesize Ba
0.5sr
0.5tiO
3powder, utilizes ceramic size casting 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, cubic block is periodically adhered on 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 within the scope of frequency 5 GHz ~ 8 GHz
11curve (due to the existence of copper film, transmission parameters S
21=0) see Fig. 3, as can be seen from the figure this matrix material has absorption peak close to 100% at f=7.29 GHz.
Embodiment 3
High-temperature solid phase reaction method is utilized to synthesize Ba
0.5sr
0.5tiO
3powder, utilizes ceramic size casting 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, cubic block is periodically adhered on 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 within the scope of frequency 5 GHz ~ 8 GHz
11curve (due to the existence of copper film, transmission parameters S
21=0) see Fig. 3, as can be seen from the figure this matrix material has absorption peak close to 100% at f=6.88 GHz.
Claims (6)
1. a high dielectric ceramic particle and tinsel composite wave-suction material, it is characterized in that: this material is made up of tinsel and multiple high dielectric ceramic particle, wherein multiple high dielectric ceramic particle is by inlay or adhesion is fixed on tinsel, be arranged in high dielectric ceramic particle array, wherein the spacing of any two adjacent high dielectric ceramic particle is equal;
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.
2. composite wave-suction material according to claim 1, is characterized in that: the shape of described high dielectric ceramic particle is spherical, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
3. composite wave-suction material according to claim 1, is characterized in that: described high dielectric ceramic particle is of a size of nm level, μm level or mm level.
4. a preparation method for high dielectric ceramic particle and tinsel composite wave-suction material, is characterized in that, concrete steps are as follows:
(1) method of high-temperature solid phase reaction method or chemosynthesis is utilized to prepare high dielectric ceramic and be processed into particulate state;
(2) by high dielectric ceramic particle by inlay or adhesion is fixed on tinsel, be arranged in high dielectric ceramic particle array, 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.
5. method according to claim 4, is characterized in that: the shape of described high dielectric ceramic particle is spherical, elliposoidal, centrum, right cylinder, rectangular parallelepiped or cubes.
6. method according to claim 4, is characterized in that: described high dielectric ceramic particle is of a size of nm level, μm level or mm level.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548590.2A CN103013440B (en) | 2012-12-17 | 2012-12-17 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548590.2A CN103013440B (en) | 2012-12-17 | 2012-12-17 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103013440A CN103013440A (en) | 2013-04-03 |
| CN103013440B true CN103013440B (en) | 2014-12-24 |
Family
ID=47962565
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| WO2015024241A1 (en) * | 2013-08-23 | 2015-02-26 | 华为技术有限公司 | Coaxial waveguide converter |
| 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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