CN107325476A - A kind of absorbing meta-material base material and preparation method thereof - Google Patents
A kind of absorbing meta-material base material and preparation method thereof Download PDFInfo
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- CN107325476A CN107325476A CN201610288288.6A CN201610288288A CN107325476A CN 107325476 A CN107325476 A CN 107325476A CN 201610288288 A CN201610288288 A CN 201610288288A CN 107325476 A CN107325476 A CN 107325476A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention provides a kind of absorbing meta-material base material and preparation method thereof.This method includes providing alloy powder and resin matrix；Wet mixing is carried out on ball mill after alloy powder and resin matrix are mixed, the composite of alloy powder and resin matrix is obtained；Composite is dried, it is hot-forming, obtain absorbing meta-material base material.The magnetic conductivity real part of the absorbing meta-material base material prepared by the method for the present invention can reach more than 13.5, and magnetic conductivity imaginary part can also reach more than 3, be a kind of preferably high performance low-frequency wave-absorbing material.
Description
Technical field
The present invention relates to Meta Materials field, more particularly, to a kind of absorbing meta-material base material and preparation method thereof.
Background technology
As communication, electronic technology are developed rapidly, mobile communication, electronic device are widely used, the convenience that it brings
While, also launch electromagnetic radiation, give people to cause harm.Militarily, stealthy continuing to develop with anti-stealth technology, various
Stealth material is continuously developed.Absorbing material is as a kind of functional material for being capable of electromagnetic wave absorption, and it can be by electromagnetism wave energy
Amount is converted into the energy of other forms, suppresses the radiation and interference of electromagnetic wave with this.Present absorbing material is widely used in hidden
Many aspects such as shape aircraft, stealthy guided missile, human-body safety protection, microwave dark room elimination, security information secrecy.
Absorbing material determines the suction ripple electromagnetic performance of stealth material as the dissipative medium in microwave absorption, at present application
Frequency range still more is limited to 4-18GHz, in current detection equipment and civilian " low frequency " for having low frequency trend, breaking through absorbing material presence
Bottleneck, is very urgent national defence and civilian needs.
The content of the invention
The invention provides absorbing meta-material base material of a kind of low frequency (1-4GHz) and preparation method thereof.The suction ripple of the present invention
Meta Materials base material can be applied to the preparation of low frequency absorbing meta-material.
The invention provides a kind of method for preparing absorbing meta-material base material, it is characterised in that methods described includes：There is provided
Alloy powder and resin matrix；Wet mixing is carried out on ball mill after the alloy powder and the resin matrix are mixed, is obtained
The composite of the alloy powder and the resin matrix；The composite is dried, it is hot-forming, obtain inhaling the super material of ripple
Expect base material.
In the above-mentioned methods, wherein, the alloy powder be FeAlSi, FeCo, FeAlCr, FeNdMn in one kind or
It is a variety of.
In the above-mentioned methods, wherein, the resin matrix include phenolic resin, polyurethane resin, epoxy resin in one
Plant or a variety of.
In the above-mentioned methods, wherein, the particle mean size of the alloy powder is 0.2um~2um, and purity is more than 99.9%.
In the above-mentioned methods, wherein, the volume ratio of the alloy powder and the resin matrix is 50vol.%-
75vol.%：25vol.%-50vol.%.
In the above-mentioned methods, wherein, the ball mill is omnidirectional planetary ball mill, and Ball-milling Time is 10~80 small
When, rotating speed is 0~300rpm.
In the above-mentioned methods, wherein, carry out ball milling using 0.5~4mm zirconium oxide bead, Ball-milling Time is 10~60 small
When, rotating speed is 0~300rpm.
In the above-mentioned methods, wherein, carry out hot-forming, hot-forming temperature using flat-bed press for 150~300
DEG C, hot-forming pressure is 50~300MPa, and the hot-forming time is 10min~60min.
In the above-mentioned methods, wherein, the particle mean size of the resin matrix is less than 1um, and purity is more than 99.9%.
In the above-mentioned methods, wherein, the absorbing meta-material base material be film or sheet material.
Present invention also offers the absorbing meta-material base material prepared by above method.
The present invention by alloy powder by being mixed into resin matrix, and magnetic conductivity real part can reach more than 13.5, and magnetic conductivity is empty
Portion can also reach more than 3, be a kind of preferably high performance low-frequency wave-absorbing material.In addition, low frequency prepared by the present invention inhales ripple material
The real part of permittivity of material is higher, reaches more than 33.The electricity of absorbing meta-material base material prepared by the method provided by the present invention
Magnetic property is suitable for the preparation for low frequency absorbing meta-material.
Brief description of the drawings
Fig. 1 shows the flow chart for the method for preparing absorbing meta-material base material.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained belongs to what the present invention was protected
Scope.
Reference picture 1, provides the substrate component of absorbing meta-material first：Alloy powder and resin matrix.Alloy powder includes
One or more in FeAlSi, FeCo, FeAlCr, FeNdMn, the particle mean size of alloy powder is about 0.2um~2um, is closed
The purity at bronze end is more than 99.9%.Resin matrix includes a kind of or many in phenolic resin, polyurethane resin, epoxy resin
Kind, the particle mean size of resin matrix is below 1um, and the purity of resin matrix is more than 99.9%.Granularity is below 1um resin base
Body promotes to mix with the uniform of alloy powder.
Then, by alloy powder and resin matrix according to volume ratio (alloy powder：Resin matrix=50vol.%-
75vol.%：25vol.%-50vol.%) mixed, mixed by this volume ratio and the electromagnetic property of Meta Materials is adapted to
Worked under low frequency, while again the deterioration of the insulating properties of Meta Materials will not be caused due to excessive alloy.In ball after mixing
Wet mixing is carried out on grinding machine, medium used in wet mixing is ethanol.Preferably, ball mill is omnidirectional planetary ball mill, Quan Fang
Position planetary ball mill is conducive to more uniformly being mixed.Ball-milling Time is 10~80 hours, and rotating speed is 0~300rpm, ball
Material volume ratio is 1-2:1.Preferably, when using zirconium oxide bead (0.5~4mm) ball milling, Ball-milling Time is 10~60 hours, is turned
Speed is 0~300rpm.Zirconium oxide bead can increase the efficiency of ball milling, the time needed for reduction ball milling.
Afterwards, the alloy powder and the mixture of resin matrix after wet mixing are dried, progress is hot-forming, obtains this
Low frequency (frequency range 1-4GHz) absorbing meta-material base material needed for invention.In hot-forming, it is preferred to use flat board hot pressing
Machine, hot-forming temperature is 150~300 DEG C, and hot-forming pressure is 50~300MPa, and the hot-forming time is
10min~60min.Base material after hot-forming can be film or sheet material.
Embodiment 1
Ball milling mixing will be carried out after 50vol.%FeAlSi alloy powders and 50vol.% phenolic resin dispensings.Using nylon
Tank and zirconia ball, ratio of grinding media to material are 1:1, Ball-milling Time 30 hours, rotating speed 300rpm, hot-forming pressure 100MPa, 200
DEG C hot-forming 20min, dries, you can obtain a kind of low frequency absorbing meta-material matrix of FeAlSi bases.
Embodiment 2
Ball milling mixing will be carried out after 60vol.%FeAlCr alloy powders and 40vol.% epoxy resin dispensings.Using nylon
Tank and zirconia ball, ratio of grinding media to material are 2:1, Ball-milling Time 10 hours, rotating speed 200rpm, hot-forming pressure 50MPa, 150
DEG C hot-forming 60min, dries, you can obtain a kind of low frequency absorbing meta-material matrix of FeAlCr bases.
Embodiment 3
Ball milling mixing will be carried out after 75vol.%FeNdMn alloy powders and 25vol.% polyurethane resin dispensings.Using Buddhist nun
Imperial tank and zirconia ball, ratio of grinding media to material is 1:1, Ball-milling Time 60 hours, rotating speed 50rpm, hot-forming pressure 300MPa,
300 DEG C of hot-forming 10min, dry, you can obtain a kind of low frequency absorbing meta-material matrix of FeNdMn bases.
Embodiment 4
Ball milling mixing will be carried out after 60vol.%FeAlSi alloy powders and 40vol.% polyurethane resin dispensings.Using Buddhist nun
Imperial tank and agate ball, ratio of grinding media to material is 1:1, Ball-milling Time 60 hours, rotating speed 250rpm, hot-forming pressure 200MPa, 250
DEG C hot-forming 40min, dries, you can obtain a kind of low frequency absorbing meta-material matrix of FeAlSi bases.
Embodiment 5
Ball milling mixing will be carried out after 70vol.%FeAlCr alloy powders and 30vol.% polyurethane resin dispensings.Using Buddhist nun
Imperial tank and nylon ball, ratio of grinding media to material is 2:1, Ball-milling Time 80 hours, rotating speed 150rpm, hot-forming pressure 50MPa, 150
DEG C hot-forming 60min, dries, you can obtain a kind of low frequency absorbing meta-material matrix of FeAlCr bases.
Embodiment 6
Ball milling mixing will be carried out after 75vol.%FeNdMn alloy powders and 25vol.% epoxy resin dispensings.Using nylon
Tank and agate ball, ratio of grinding media to material are 1:1, Ball-milling Time 10 hours, rotating speed 100rpm, hot-forming pressure 250MPa, at 50 DEG C
Hot-forming 10min, dries, you can obtain a kind of low frequency absorbing meta-material matrix of FeNdMn bases.
Embodiment 7
Ball milling mixing will be carried out after 75vol.%FeCo alloy powders and 25vol.% epoxy resin dispensings.Using nylon tank
And agate ball, ratio of grinding media to material is 1:1, Ball-milling Time 30 hours, rotating speed 80rpm, hot-forming pressure 250MPa, in 50 DEG C of hot pressing
10min is molded, is dried, you can a kind of low frequency absorbing meta-material matrix of FeCo bases is obtained.
Determined below using HP8510 Network Analyzers embodiment 1-7 low frequency absorbing meta-material base material microwave section (1~
Magnetic conductivity and dielectric constant 4GHz).Parameter measurement is carried out by sample of absorbing material thick 2mm, data are as shown in table 1 below：
Table 1
Magnetic conductivity of the existing absorbing material under 1-4GHz frequency (i.e. low frequency) is generally less than 2, some composites
Magnetic conductivity also can only achieve 5 or so.And in the present invention, by the way that alloy powder is mixed into resin matrix, magnetic conductivity real part energy
More than 13.5 are reached, and magnetic conductivity imaginary part can also reach more than 3, be a kind of preferably high performance low-frequency wave-absorbing material.In addition,
The real part of permittivity of low-frequency wave-absorbing material prepared by the present invention is higher, reaches more than 33.The method system provided by the present invention
The electromagnetic property of standby absorbing meta-material base material is suitable for the preparation for low frequency absorbing meta-material.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (11)
1. a kind of method for preparing absorbing meta-material base material, it is characterised in that methods described includes：
Alloy powder and resin matrix are provided；
Wet mixing is carried out on ball mill after the alloy powder and the resin matrix are mixed, the alloy powder and institute is obtained
State the composite of resin matrix；
The composite is dried, it is hot-forming, obtain absorbing meta-material base material.
2. according to the method described in claim 1, it is characterised in that the alloy powder be FeAlSi, FeCo, FeAlCr,
One or more in FeNdMn.
3. according to the method described in claim 1, it is characterised in that the resin matrix include phenolic resin, polyurethane resin,
One or more in epoxy resin.
4. according to the method described in claim 1, it is characterised in that the particle mean size of the alloy powder is 0.2um~2um,
Purity is more than 99.9%.
5. according to the method described in claim 1, it is characterised in that the volume ratio of the alloy powder and the resin matrix is
50vol.%-75vol.%：25vol.%-50vol.%.
6. according to the method described in claim 1, it is characterised in that the ball mill is omnidirectional planetary ball mill, ball milling
Time is 10~80 hours, and rotating speed is 0~300rpm.
7. method according to claim 6, it is characterised in that carry out ball milling, ball milling using 0.5~4mm zirconium oxide bead
Time is 10~60 hours, and rotating speed is 0~300rpm.
8. according to the method described in claim 1, it is characterised in that carried out using flat-bed press it is hot-forming, it is hot-forming
Temperature be 150~300 DEG C, hot-forming pressure is 50~300MPa, and the hot-forming time is 10min~60min.
9. according to the method described in claim 1, it is characterised in that the particle mean size of the resin matrix is less than 1um, purity is big
In 99.9%.
10. according to the method described in claim 1, it is characterised in that the absorbing meta-material base material is film or sheet material.
11. absorbing meta-material base material prepared by the method according to any one of claim 1-10.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384243A (en) * | 2018-03-02 | 2018-08-10 | 龙岩紫荆创新研究院 | A kind of magnetic composite and preparation method thereof |
| CN108617155A (en) * | 2018-04-20 | 2018-10-02 | 浙江大学 | A kind of full angle absorbing material of spatial dispersion and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103918A (en) * | 2009-12-18 | 2011-06-22 | 北京有色金属研究总院 | Thin low-frequency wave-absorbing material and preparation method thereof |
| US20130056673A1 (en) * | 2011-09-06 | 2013-03-07 | Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense | Electromagnetic Wave-Absorbing Material |
| CN104735964A (en) * | 2015-02-02 | 2015-06-24 | 邓秀梅 | Microwave-absorbing material for microwave chamber and printing production method thereof |
-
2016
- 2016-04-29 CN CN201610288288.6A patent/CN107325476A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103918A (en) * | 2009-12-18 | 2011-06-22 | 北京有色金属研究总院 | Thin low-frequency wave-absorbing material and preparation method thereof |
| US20130056673A1 (en) * | 2011-09-06 | 2013-03-07 | Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense | Electromagnetic Wave-Absorbing Material |
| CN104735964A (en) * | 2015-02-02 | 2015-06-24 | 邓秀梅 | Microwave-absorbing material for microwave chamber and printing production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384243A (en) * | 2018-03-02 | 2018-08-10 | 龙岩紫荆创新研究院 | A kind of magnetic composite and preparation method thereof |
| CN108617155A (en) * | 2018-04-20 | 2018-10-02 | 浙江大学 | A kind of full angle absorbing material of spatial dispersion and preparation method thereof |
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