CN109413976A - A kind of highly sensitive electromagnetic wave absorption material of wideband and preparation method thereof - Google Patents
A kind of highly sensitive electromagnetic wave absorption material of wideband and preparation method thereof Download PDFInfo
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Abstract
The invention discloses highly sensitive electromagnetic wave absorption materials of a kind of wideband and preparation method thereof, the highly sensitive electromagnetic wave absorption material of wideband is bonded by two layers of absorbing material, the manganese-zinc ferrite and high polymer binder that first layer absorbing material is sintered by Low Temperature Solid-Phase are combined, and second layer absorbing material is bonded together by 2-5 μm of double-sided adhesive with first layer absorbing material by nanocrystalline band or amorphous ribbon.The electromagnetic wave absorption material has frivolous, wideband, highly sensitive, industrialized advantage easy to accomplish, has broad mass market prospect in civilian and military suction wave field.
Description
Technical field
The present invention relates to absorbing material fields, and in particular to a kind of highly sensitive electromagnetic wave absorption material of wideband and its preparation side
Method.
Background technique
With the rapid development of electronic information technologies, electromagnetic wave using more and more extensive, this is just inevitably caused
Electromagnetic pollution.The electromagnetic wave being full of in the environment can not only interfere electromagnetic control system to lead to equipment fault, can also damage people
The physical and mental health of class.Absorbing material technology, can be harmful useless electromagnetic energy as the common electromagnetism interference means of tradition
Amount absorbs, conversion attenuates, and is always the research hotspot place of civil and military anti-electromagnetic radiation.
Existing absorbing material mainly reaches wave-absorbing effect by impedance matching and two aspect of decaying matching, wherein hindering
Anti- matching can be such that incident electromagnetic wave enters in absorbing material to the maximum extent, reduce reflection；And decay matching be then make into
The electromagnetic wave entered into material is lost to the maximum extent along transmission path, and major way has resistance loss, dielectric loss and magnetic
Three kinds of loss.Due to using the relatively single of material, have for absorbing material by impedance matching or decaying matching merely
There is significant limitation, the research hotspot of absorbing material has been transferred at present, the compound of a variety of absorbing materials is inhaled to improve
The wave-absorbing effect of wave material.
Patent 201711381603.0 discloses a kind of preparation method of electromagnetic wave absorbent material based on ferrite solid waste,
It is compound by the ferrite progress carbon to solid waste, a kind of electromagnetic wave absorption material suitable for DC-42.5GHz frequency range has been obtained,
However, being easy to produce transgranular rupture with the ferrite solid waste that the grinding of soft magnetic core production link generates, having seriously affected ferrite
Electromagnetic performance, reduce wave-absorbing effect.By the way of Low Temperature Solid-Phase sintering, complete ferrite powder can be produced
Grain, improves ferritic electromagnetic performance and wave-absorbing effect.Furthermore simple ferrite carbon composite wave-suction material, which exists, inhales wave frequency
The disadvantages such as section is narrow, and sensitivity is low.
Patent 200810028925.1 discloses a kind of nanocrystalline ultra-fine alloy powder electromagnetic wave absorbent and preparation method thereof,
It is prepared by self-propagating combustion, regulates and controls the magnetic conductance at microwave frequencies of metal powder in preparation process by being heat-treated
Rate, so as to achieve the effect that wave frequency band is inhaled in regulation.The nanocrystalline ultra-fine alloy powder electromagnetic wave of this preparation method production is inhaled
Although receiving agent has good wave-absorbing effect, especially for frequency electromagnetic waves, its production technology is complex and unsuitable
Industrialized production.Therefore by improving the suction wave of material to the nanocrystalline or amorphous band compound of existing industrialized production
Effect is a kind of more efficiently means.
It is narrow compared to existing absorbing material absorption band, the disadvantages such as density is big, and sensitivity is low, a kind of width of the present invention
Frequently highly sensitive electromagnetic wave absorption material and preparation method thereof can make up the deficiencies in the prior art, hence it is evident that improve wave-absorbing effect, nothing
There is broad mass market prospect by civilian or military suction wave field.
Summary of the invention
Disadvantages, the present invention such as existing absorbing material, that there are absorption bands is narrow, and density is big, and sensitivity is low provide a kind of width
Frequently highly sensitive electromagnetic wave absorption material and preparation method thereof.The absorbing material has the advantages that frivolous, wideband, highly sensitive.
The specific technical solution of the present invention is as follows:
A kind of highly sensitive electromagnetic wave absorption material of wideband and preparation method thereof is combined by two layers of composite wave-suction material bonding,
The first layer composite material is sintered powder body material by Low Temperature Solid-Phase and high polymer binder is combined, and the second layer is compound
Absorbing material is formed by nanocrystalline material or non-crystalline material by 2-5 μm of transparent adhesive tape bonding laminates.
Preferably, in first layer composite material, manganese-zinc ferrite is sintered by the Low Temperature Solid-Phase of mass percent 55-80wt%
Powder body material and high polymer binder are combined.
Preferably, first layer composite material with a thickness of 100-1000 μm.
Preferably, second layer composite material with a thickness of 10-300 μm.
The Low Temperature Solid-Phase is sintered manganese-zinc-ferrite powder material, is made of the raw material of following mass percent:
Fe2O3: 67-72wt%；
MnO:10-26wt%；
ZnO:5-15wt%；
Carbon fiber powder: 0.2-0.8wt%.
Wherein, each material purity is as follows:
Di-iron trioxide: >=99.5%；
Mangano-manganic oxide: >=99%；
Zinc oxide: >=99%；
Carbon fiber powder: >=99.5%.
Preferably, told Low Temperature Solid-Phase is sintered manganese-zinc-ferrite powder material, further includes in following content dopant ingredient
One or more:
TiO2: 0.01-0.2wt%；Bi2O3: 0.01-0.2wt%；CaCO3: 0.01-0.2wt%；V2O5: 0.01-0.2wt%.
Preferably, the raw material MnO in told Low Temperature Solid-Phase sintering manganese-zinc-ferrite powder material, can use Mn3O4Replacement.
Preferably, the raw material carbon fiber powder in told Low Temperature Solid-Phase sintering manganese-zinc-ferrite powder material, can use hydrophily
Carbon black replacement.
Preferably, told high polymer binder is thermoplastic resin, thermosetting resin or rubber.
The first layer composite material preparation includes the following steps:
1) ingredient: by Fe2O3, MnO, ZnO and carbon fiber powder carry out wet process sand according to mass percent weighing mixing, doping
60-180min is ground, granularity control is at 0.8 μm or less after sand milling；
2) dry: the raw material after sand milling to be placed in drying box dry complete；
3) it is sintered: by the powder after drying in N2In atmosphere, it is warming up to 900-1000 DEG C, keeps the temperature 2-4h, Temperature fall；
4) slurrying: sintered powder is stirred evenly in agitator tank with high polymer binder by mass percentage, and deaeration
Processing；
5) be cast: the slurry after deaeration is cast into diaphragm by control casting temperature and speed in casting machine.
Preferably, ingredient in told first layer composite material and preparation method thereof are as follows: to Fe2O3, MnO, ZnO and carbon fiber powder are former
One or more of following content dopant ingredient: TiO2:0.01-0.2wt% is added in material；Bi2O3:0.01-0.2wt%；
CaCO3:0.01-0.2wt%；V2O5:0.01-0.2wt%.
Preferably, being sanded in told first layer composite material and preparation method thereof includes: according to the raw material and deionization after doping
The ratio of the weight ratio 2:1 of water mixes, and sand mill is added and 60-180min is sanded, wherein being sanded 1500-2500 revs/min of revolving speed
Clock, granularity control is at 0.8 μm or less after sand milling.
Preferably, sintering includes: N in told first layer composite material and preparation method thereof2Atmosphere is stream nitrogen condition.
Described nanocrystalline or non-crystalline material is with a thickness of 10-30 μm.
Preferably, it tells nanocrystalline for the nanocrystalline material containing Fe, Si, B, Cu or Nb.
Preferably, told amorphous is the non-crystalline material containing Fe, Si or B.
Preferably, tell that nanocrystalline or non-crystalline material carries out 200-600 DEG C of vacuum annealing process.
The present invention also provides a kind of preparation methods of above-mentioned electromagnetic wave absorbent material, comprising:
1) first layer composite material is bonded by 2-5 μm of transparent adhesive tape with second layer composite wave-suction material；
2) second layer composite wave-suction material is formed by nanocrystalline or non-crystalline material bonding laminates, can be one or more layers, multilayer
Nanocrystalline or non-crystalline material is mutually bonded by 2-5 μm of transparent adhesive tape and is formed by stacking.
Compared with prior art, the present invention has following major advantage:
1) present invention combines Low Temperature Solid-Phase sintering manganese-zinc ferrite composite material with the nanocrystalline/non-crystalline material,
Make the electromagnetic wave absorbent material being prepared that there is excellent magneto-electric behavior, widens service band range, while light, temperature
Stability is good, improves the disadvantages such as traditional absorbing material absorption band is narrow, and density is big, and sensitivity is low.
2) by being adjusted at the annealing with nanocrystalline/non-crystalline material different temperatures to manganese-zinc ferrite composite-material formula
Reason, so as to further achieve the effect that wave frequency band is inhaled in regulation.
General description and following detailed description more than it should be understood that be only it is exemplary and explanatory, not
It can the limitation present invention.
Specific embodiment
Below with reference to embodiment, the content of the present invention will be explained in more detail.It should be appreciated that implementation of the invention is not limited to
In the following examples, the accommodation in any form or change made to the present invention both fall within the scope of the present invention；Under and
The method in embodiment is stated, is the conventional method of this field unless otherwise instructed.
Embodiment 1:
A kind of highly sensitive electromagnetic wave absorption material of wideband is combined by two layers of composite wave-suction material bonding, first layer composite wood
Material is sintered manganese-zinc-ferrite powder material and high polymer binder by Low Temperature Solid-Phase and is combined, second layer composite wave-suction material by
Nanocrystalline material is formed by 3 μm of transparent adhesive tape bonding laminates:
Wherein Low Temperature Solid-Phase is sintered manganese-zinc-ferrite powder material, is made of the raw material of following mass percent:
Fe2O3: 68.5wt%；MnO:20.2wt%；ZnO:11.2wt%；Carbon fiber powder: 0.4wt%；TiO2: 0.06wt%；CaCO3:
0.04wt%.Wherein, each material purity is as follows: Fe2O3: 99.5%；MnO:99.1%；ZnO:99.5%；Carbon fiber powder: 99.5%；
TiO2: analysis is pure；CaCO3: analysis is pure.
By Fe2O3, MnO, ZnO and carbon fiber powder weigh mixing, doping, and carries out wet process and 120min, granularity after sand milling is sanded
Control is dried completely at 0.8 μm hereinafter, the raw material after sand milling is placed in drying box, and in N2The protection of stream nitrogen, heating in atmosphere
To 960 DEG C, 3h is kept the temperature, Temperature fall is made Low Temperature Solid-Phase and is sintered 2.2 μm of manganese-zinc-ferrite powder material average particle size.
By sintered powder, 2.5:1 is stirred with the polyurethane for being dissolved in cyclohexanone in agitator tank by mass percentage
It is even, and deaeration is handled, curtain coating is hot pressed into the composite material of 600 μ m thicks.
The nanocrystalline material of 20 μ m thicks is carried out to 460 DEG C of annealing, and passes through 5 layers of transparent adhesive tape lamination of 3 μ m-thicks
Bonding, compacting.
Above two composite material is compacted by 5 μm of transparent gluing knot, the highly sensitive rubber-ferrite material of wideband is made
Material.
Embodiment 2:
A kind of highly sensitive electromagnetic wave absorption material of wideband is combined by two layers of composite wave-suction material bonding, first layer composite wood
Material is sintered manganese-zinc-ferrite powder material and high polymer binder by Low Temperature Solid-Phase and is combined, second layer composite wave-suction material by
Non-crystalline material is formed by 3 μm of transparent adhesive tape bonding laminates:
Wherein Low Temperature Solid-Phase is sintered manganese-zinc-ferrite powder material, is made of the raw material of following mass percent:
Fe2O3: 69.2wt%；MnO:18.6wt%；ZnO:12.0wt%；Carbon fiber powder: 0.5wt%；Bi2O3: 0.1wt%；.Wherein,
Each material purity is as follows: Fe2O3: 99.5%；MnO:99.1%；ZnO:99.5%；Carbon fiber powder: 99.5%；Bi2O3: analysis is pure.
By Fe2O3, MnO, ZnO and carbon fiber powder weigh mixing, doping, and carries out wet process and 120min, granularity after sand milling is sanded
Control is dried completely at 0.8 μm hereinafter, the raw material after sand milling is placed in drying box, and in N2The protection of stream nitrogen, heating in atmosphere
To 940 DEG C, 2.5h is kept the temperature, Temperature fall is made Low Temperature Solid-Phase and is sintered 1.8 μm of manganese-zinc-ferrite powder material average particle size.
By sintered powder, 1.8:1 is stirred with the epoxy resin for being dissolved in acetone in agitator tank by mass percentage
It is even, and deaeration is handled, curtain coating is hot pressed into the composite material of 800 μ m thicks.
The non-crystalline material of 30 μ m thicks is carried out to 300 DEG C of annealing, and 3 layers of transparent adhesive tape lamination by 3 μ m-thicks are viscous
Knot, compacting.
Above two composite material is compacted by 5 μm of transparent gluing knot, the highly sensitive rubber-ferrite material of wideband is made
Material.
Embodiment 3:
A kind of highly sensitive electromagnetic wave absorption material of wideband is combined by two layers of composite wave-suction material bonding, first layer composite wood
Material is sintered manganese-zinc-ferrite powder material and high polymer binder by Low Temperature Solid-Phase and is combined, second layer composite wave-suction material by
Nanocrystalline material and non-crystalline material are formed by 3 μm of transparent adhesive tape bonding laminates:
Wherein Low Temperature Solid-Phase is sintered manganese-zinc-ferrite powder material, is made of the raw material of following mass percent:
Fe2O3: 69.4wt%；MnO:19.2wt%；ZnO:11.4wt%；Hydrophilic carbon black: 0.5wt%；CaCO3: 0.08wt%；.Its
In, each material purity is as follows: Fe2O3: 99.5%；MnO:99.1%；ZnO:99.5%；Hydrophilic carbon black: 99.5%；CaCO3: analysis
It is pure.
By Fe2O3, MnO, ZnO and carbon fiber powder weigh mixing, doping, and carries out wet process and 120min, granularity after sand milling is sanded
Control is dried completely at 0.8 μm hereinafter, the raw material after sand milling is placed in drying box, and in N2The protection of stream nitrogen, heating in atmosphere
To 950 DEG C, 3.5h is kept the temperature, Temperature fall is made Low Temperature Solid-Phase and is sintered 2.6 μm of manganese-zinc-ferrite powder material average particle size.
By sintered powder, 1.7:1 is being stirred with the organosilicon epoxy hybrid resin for being dissolved in isobutanol by mass percentage
It mixes in tank and stirs evenly, and deaeration is handled, curtain coating is hot pressed into the composite material of 700 μ m thicks.
The nanocrystalline material of 15 μ m thicks is subjected to 500 DEG C of annealings, non-crystalline material carries out 320 DEG C of annealing,
And it is bonded for totally 6 layers by the mutual lamination of transparent adhesive tape of 3 μ m-thicks, compacting.
Above two composite material is compacted by 5 μm of transparent gluing knot, the highly sensitive rubber-ferrite material of wideband is made
Material.
Claims (8)
1. a kind of highly sensitive electromagnetic wave absorption material of wideband and preparation method thereof, which is characterized in that the highly sensitive electromagnetism of wideband
Wave absorbing material is bonded by two layers of absorbing material, the manganese-zinc ferrite and height that first layer absorbing material is sintered by Low Temperature Solid-Phase
Molecular binder is combined, and second layer absorbing material is passed through 2-5 μm of double-sided adhesive and first layer by nanocrystalline band or amorphous ribbon
Absorbing material is bonded together；Wherein in the first layer absorbing material, burnt by the Low Temperature Solid-Phase of mass percent 55-80wt%
Knot manganese-zinc-ferrite powder material and high polymer binder are combined.
2. the highly sensitive electromagnetic wave absorption material of wideband according to claim 1, which is characterized in that the Low Temperature Solid-Phase is sintered manganese
Zn ferrite powder body material is made of the raw material of following mass percent:
Fe2O3: 67-72wt%；
MnO:10-26wt%；
ZnO:5-15wt%；
Carbon fiber powder: 0.2-0.8wt%；
Wherein, each material purity is as follows:
Di-iron trioxide: >=99.5%；
Mangano-manganic oxide: >=99%；
Zinc oxide: >=99%；
Carbon fiber powder: >=99.5%.
3. the highly sensitive electromagnetic wave absorption material of wideband according to claim 1, which is characterized in that the Low Temperature Solid-Phase is sintered manganese
Zn ferrite powder body material further includes one or more of following content dopant ingredient:
TiO2: 0.01-0.2wt%；
Bi2O3: 0.01-0.2wt%；
CaCO3: 0.01-0.2wt%；
V2O5: 0.01-0.2wt%.
4. the highly sensitive electromagnetic wave absorption material of wideband according to claim 1, which is characterized in that the first layer composite material
Preparation includes the following steps:
1) ingredient: by Fe2O3, MnO, ZnO and carbon fiber powder carry out wet process sand according to mass percent weighing mixing, doping
60-180min is ground, granularity control is at 0.8 μm or less after sand milling；
2) dry: the raw material after sand milling to be placed in drying box sufficiently dry；
3) it is sintered: by the powder after drying in N2In atmosphere, it is warming up to 900-1000 DEG C, keeps the temperature 2-4h, Temperature fall；
4) slurrying: sintered powder is stirred evenly in agitator tank with high polymer binder by mass percentage, and deaeration
Processing；
5) be cast: the slurry after deaeration is cast into diaphragm by control casting temperature and speed in casting machine.
5. the highly sensitive electromagnetic wave absorption material of wideband according to claim 1, which is characterized in that the high polymer binder is
Thermoplastic resin, thermosetting resin or rubber.
6. the highly sensitive electromagnetic wave absorption material of wideband according to claim 1, which is characterized in that the nanocrystalline material is non-
Brilliant material with a thickness of 10-30 μm.
7. Low Temperature Solid-Phase according to claim 3 is sintered manganese-zinc-ferrite powder material, which is characterized in that the raw material
MnO can use Mn3O4Replacement, the raw material carbon fiber powder can be replaced with hydrophilic carbon black.
8. a kind of highly sensitive electromagnetic wave absorption material preparation method of wideband according to claim 1, which is characterized in that packet
It includes:
First layer absorbing material is bonded by 2-5 μm of transparent adhesive tape with second layer composite wave-suction material；
2) second layer absorbing material is formed by nanocrystalline or non-crystalline material bonding laminates, can be one or more layers, multi-layer nano
Brilliant or non-crystalline material is mutually bonded by 2-5 μm of transparent adhesive tape and is formed by stacking.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995386A (en) * | 2020-09-09 | 2020-11-27 | 合肥工业大学 | Preparation method of ferrite solid waste based ceramic wave-absorbing material |
| CN112072324A (en) * | 2020-09-14 | 2020-12-11 | 南昌航空大学 | Manganese oxide graphene nano wave-absorbing material and preparation process thereof |
| CN114654823A (en) * | 2022-03-29 | 2022-06-24 | 重庆科技学院 | Mn-Zn ferrite-FeSiAl composite wave-absorbing material and preparation method thereof |
| CN115141020A (en) * | 2022-07-01 | 2022-10-04 | 南京工业大学 | Preparation method of high-toughness broadband electromagnetic wave absorption super-layered bionic ceramic |
| CN115521710A (en) * | 2022-09-28 | 2022-12-27 | 湖南航天磁电有限责任公司 | Low-frequency wave-absorbing coating and preparation method thereof |
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| CN114654823A (en) * | 2022-03-29 | 2022-06-24 | 重庆科技学院 | Mn-Zn ferrite-FeSiAl composite wave-absorbing material and preparation method thereof |
| CN115141020A (en) * | 2022-07-01 | 2022-10-04 | 南京工业大学 | Preparation method of high-toughness broadband electromagnetic wave absorption super-layered bionic ceramic |
| CN115521710A (en) * | 2022-09-28 | 2022-12-27 | 湖南航天磁电有限责任公司 | Low-frequency wave-absorbing coating and preparation method thereof |
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