CN108865060A - The preparation method and applications of graphene composite wave-suction material based on 5G communication - Google Patents
The preparation method and applications of graphene composite wave-suction material based on 5G communication Download PDFInfo
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Abstract
The invention discloses a kind of preparation method and applications of graphene composite wave-suction material based on 5G communication, the present invention obtains the flake graphite alkene composite wave-suction material with excellent impedance matching performance by the mixture of mechanical ball mill carbonyl iron dust and graphene oxide.In 2~18GHz frequency range, when applied thickness is 1mm, reflection loss peak reaches -5.8dB near 5GHz, in RL<The Effective frequency width of absorption of -4.0dB is 5GHz (3.2~8.2GHz), completely covers the full frequency band (3.3~3.6GHz and 4.8~5.0GHz) of the mobile 5G of Science in Future in China of the Ministry of Industry and Information Technology's publication.And the content of adjustable Ball-milling Time and calcium stearate changes the position of graphene composite wave-suction material absorption peak, achievees the purpose that interference noise can be absorbed in any two Frequency Band Selection of the following 5G.
Description
Technical field
The present invention is a kind of preparation method and applications of graphene composite wave-suction material based on 5G communication, belongs to suction wave
Field of material technology.
Background technique
In recent years, electromagnetic wave is communicated in household electrical appliance, and many fields such as personal digital assistant are widely used,
Also occur serious wave radiation and pollution problem while facilitating people to live.Nowadays, Mobile Communication Development is rapid,
Frequency usage planning of the issued 5G system of the Ministry of Industry and Information Technology of China in 3000~5000MHz frequency range.Soon
In the future, 5G mobile communication will open the completely new gate of a fan for us, but the electromagenetic wave radiation of various high intensity will make
5G communication be forced in one full of electromagenetic wave radiation pollution environment in propagate.This Contamination of Electromagnetic Wave can be in mobile communication
Interference signal is generated in communication process, to influence communication quality.
Absorbing material can be absorbed and decay incident electromagnetic wave as a kind of effective electromagnetic absorber, be translated into
The energy dissipation of thermal energy or other forms is fallen, and has become the important of prevention electromagnetic pollution using absorbing material electromagnetic wave absorption
Means.Interference signal is lost using absorbing material, by useful signal, to improve the receiving sensitivity of 5G communication, makes user
Can obtain more quickly, accurate, clearly information.
As a kind of traditional absorbing material, carbonyl iron dust saturation magnetization with higher, microwave frequency band have compared with
Strong wave-sucking performance.But the density of carbonyl iron dust is big, temperature stability is poor, and absorption band is narrow, is not able to satisfy absorbing material
The requirement of " thin, light, wide, strong ", to limit its practical application in terms of absorbing material.And graphene is a kind of novel
Two dimensional crystal carbon material, have thickness it is thin, density is low, and interface is big, and mechanical strength is strong, and electric conductivity and thermal conductivity are good, surface area and
The a series of peculiar properties such as light transmission is big, are widely used in supercapacitor, sensor and absorbing material.And it is aoxidizing
In graphene-structured, the presence of various oxygen-containing functional groups (C=O, C-O ,-OH) may also be synthesized with each of different electromagnetic performances
Kind composite material.
Summary of the invention
The present invention be exactly be directed to above-mentioned prior art situation and design provide it is a kind of based on 5G communication graphene it is compound
The preparation method and applications of absorbing material, the purpose is to by adjusting compound suction for carbonyl iron dust and graphene oxide are compound
The complex dielectric permittivity and complex permeability of wave material improve impedance matching, to obtain the better composite wave-suction material of absorbent properties.
The purpose of the present invention is achieved through the following technical solutions：
Technical solution of the present invention provides a kind of preparation method of graphene composite wave-suction material based on 5G communication, special
Sign is：The step of this method, is as follows：
Step 1: carbonyl iron dust is preheated under protection of argon gas；
Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out ball milling, ball
Time consuming is 1~3 hour, obtains mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 5g: 0.1g: 0.01~0.1g: 40~
50mL；
Step 3: the mixed slurry after ball milling is dried in vacuo, graphene composite wave-suction material is obtained.
Further, the preheating temperature in step 1 is 100~150 DEG C, and preheating time is 1~2 hour.
Further, in step 2, ball milling be pendulum shake ball mill in be added bearing steel ball carry out, bearing steel ball by
The bead of diameter 6mm and the middle ball composition of diameter 8mm, the weight ratio of the two is 1: 1.
Further, the total weight of carbonyl iron dust, graphene oxide and calcium stearate and the weight ratio of bearing steel ball are 1:
10。
Further, vacuum drying temperature described in step 3 is 50~60 DEG C, and soaking time is 1~2 hour.
Further, Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out
Ball milling, Ball-milling Time are 1 hour, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.01: 50mL.
Further, Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out
Ball milling, Ball-milling Time are 2 hours, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.01: 50mL.
Further, Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out
Ball milling, Ball-milling Time are 1 hour, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.1: 50mL.
Further, Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out
Ball milling, Ball-milling Time are 2 hours, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.1: 50mL.
Technical solution of the present invention additionally provides the application of the graphene composite wave-suction material based on 5G communication described in one kind,
It is characterized in that：The electromagnetic wave signal that graphene composite wave-suction material is used for mobile communication 5G full frequency band as wave absorbing agent is inhaled
It receives.
For the present invention by the way that graphene oxide and calcium stearate are added into carbonyl iron dust, preparing by mechanical ball mill can
Graphene composite wave-suction material applied to the following mobile 5G full frequency band.The graphene composite wave-suction material has microwave absorbing coating
Thin, surface density is gently, suction wave frequency bandwidth, absorbent properties are good, prepares the advantages that easy.
A kind of absorbing material of the graphene composite wave-suction material of the present invention as coating-type be in applied thickness
When 1mm, reflection loss peak reaches -5.8dB near 5GHz, in RL<The Effective frequency width of absorption of -4.0dB is 5GHz (3.2
~8.2GHz), completely cover the mobile 5G of Science in Future in China of the Ministry of Industry and Information Technology's publication full frequency band (3.3~3.6GHz and
4.8~5.0GHz).
Technical solution of the present invention can be changed by adjusting the ratio of Ball-milling Time and calcium stearate complex dielectric permittivity and
The relationship of complex permeability, to adjust the position of composite material absorption peak, with reach can be in any two frequency range of the following 5G
The purpose of selective absorbing interference noise.
Detailed description of the invention
Fig. 1 is the preparation technology flow chart of future 5G mobile communication full frequency bands graphene composite wave-suction material of the invention；
Fig. 2 is the scanning electron microscopic picture of conventional form graphene oxide raw material；
Fig. 3 is the scanning electron microscopic picture of conventional form carbonyl iron dust raw material；
Fig. 4 is the scanning electron microscopic picture of the graphene composite wave-suction material of embodiment 3；
Fig. 5 is the scanning electron microscopic picture of the graphene composite wave-suction material of embodiment 4；
Fig. 6 is the power spectrum picture of the composite wave-suction material of embodiment 3；
Fig. 7 is the power spectrum picture of the composite wave-suction material of embodiment 4；
Fig. 8 is Fu for the graphene composite wave-suction material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 are prepared
In leaf transformation infrared spectrum curve；
Fig. 9 is answering for the graphene composite wave-suction material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 are prepared
Real part of permittivity curve；
Figure 10 is answering for the graphene composite wave-suction material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 are prepared
Imaginary part of dielectric constant curve；
Figure 11 is answering for the graphene composite wave-suction material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 are prepared
Magnetic conductivity real part curve；
Figure 12 is answering for the graphene composite wave-suction material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 are prepared
Magnetic conductivity imaginary part curve；
Figure 13 is the anti-of the graphene composite wave-suction material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 are prepared
Penetrate damage curve (coating layer thickness 1mm).
Specific embodiment
Embodiment 1
A kind of process of the preparation method based on the following 5G mobile communication full frequency bands graphene composite wave-suction material is as follows：
The pre-heat treatment carried out to carbonyl iron dust raw material first, the pre-heat treatment by raw material under protection of argon gas, it is pre- at 100 DEG C
Heat 2 hours；By pellet mass ratio 1:10 are put into 4.9g carbonyl iron dust raw material and bearing steel ball in ball grinder, and wherein bearing steel rolls
Pearl is made of the middle ball of bead and 8mm that diameter is 6mm, and the mass ratio of bead and middle ball is 1:1,0.1g is added into ball grinder
Graphene oxide, 0.01g calcium stearate, and 50mL dehydrated alcohol submergence raw material is added, with glass bar closed dress after mixing evenly
Enter and carry out ball-milling treatment in pendulum shake ball mill, Ball-milling Time is 1 hour, and ball milling makes the pattern of spherical carbonyl iron powder change into tool
There is the sheet-like particle of certain draw ratio, while ball milling is but also carbonyl iron dust is uniformly mixed with graphene oxide.After the completion of ball milling
The slurry of acquisition is put into vacuum drying box and is dried 1 hour at 50 DEG C, can be obtained carbonyl iron dust of the present invention with
The composite wave-suction material of graphene oxide.
The Fourier transform for testing acquisition graphene composite wave-suction material using PerkinElmer FTIR (C96926) is red
(FTIR) spectrogram outside, as shown in Figure 8；Coaxial axis method measures graphite using Agilent vector network analyzer (PNA 8363B)
Complex dielectric permittivity and complex permeability (ε ', ε ", μ ', μ ") of the alkene composite wave-suction material in 2~18GHz frequency range, as Fig. 9,
Shown in Figure 10, Figure 11, Figure 12；Then reflection loss when coating layer thickness is 1mm is calculated according to transmission line theory simulation, such as schemed
Shown in 13.
Embodiment 2
A kind of process of the preparation method based on the following 5G mobile communication full frequency bands graphene composite wave-suction material is as follows：
The pre-heat treatment carried out to carbonyl iron dust raw material first, the pre-heat treatment by raw material under protection of argon gas, it is pre- at 100 DEG C
Heat 2 hours；By pellet mass ratio 1:10 are put into 4.9g carbonyl iron dust raw material and bearing steel ball in ball grinder, and wherein bearing steel rolls
Pearl is made of the middle ball of bead and 8mm that diameter is 6mm, and the mass ratio of bead and middle ball is 1:1,0.1g is added into ball grinder
Graphene oxide, 0.01g calcium stearate, and 50mL dehydrated alcohol submergence raw material is added, with glass bar closed dress after mixing evenly
Enter and carry out ball-milling treatment in pendulum shake ball mill, Ball-milling Time is 2 hours, and ball milling makes the pattern of spherical carbonyl iron powder change into tool
There is the sheet-like particle of certain draw ratio, while ball milling is but also carbonyl iron dust is uniformly mixed with graphene oxide.After the completion of ball milling
The slurry of acquisition is put into vacuum drying box and is dried 1 hour at 50 DEG C, can be obtained carbonyl iron dust of the present invention with
The composite wave-suction material of graphene oxide.
Fourier-transform infrared (FTIR) spectrogram for obtaining sample is tested using PerkinElmer FTIR (C96926),
As shown in Figure 8；Coaxial axis method is using Agilent vector network analyzer (PNA 8363B) measurement sample in 2~18GHz frequency model
Interior complex dielectric permittivity and complex permeability (ε ', ε ", μ ', μ ") are enclosed, as shown in Fig. 9, Figure 10, Figure 11, Figure 12；Then according to transmission
Line theoretical modeling calculates reflection loss when coating layer thickness is 1mm, as shown in figure 13.
Embodiment 3
A kind of process of the preparation method based on the following 5G mobile communication full frequency bands graphene composite wave-suction material is as follows：
The pre-heat treatment carried out to carbonyl iron dust raw material first, the pre-heat treatment by raw material under protection of argon gas, it is pre- at 100 DEG C
Heat 2 hours；By pellet mass ratio 1:10 are put into 4.9g carbonyl iron dust raw material and bearing steel ball in ball grinder, and wherein bearing steel rolls
Pearl is made of the middle ball of bead and 8mm that diameter is 6mm, and the mass ratio of bead and middle ball is 1:1,0.1g is added into ball grinder
Graphene oxide, 0.1g calcium stearate, and 50mL dehydrated alcohol submergence raw material is added, with glass bar closed loading after mixing evenly
Ball-milling treatment is carried out in pendulum shake ball mill, Ball-milling Time is 1 hour, and ball milling, which changes into the pattern of spherical carbonyl iron powder, to be had
The sheet-like particle of certain draw ratio, while ball milling is but also carbonyl iron dust is uniformly mixed with graphene oxide.It will after the completion of ball milling
The slurry of acquisition is put into vacuum drying box dries 1 hour at 50 DEG C, and carbonyl iron dust and oxygen of the present invention can be obtained
The composite wave-suction material of graphite alkene.
Using scanning electron microscope (SEM, Hitachi S-3400) to the microscopic appearance and Elemental redistribution of composite material
It is characterized, as shown in Fig. 8, Fig. 6；The Fourier transform for testing acquisition sample using PerkinElmer FTIR (C96926) is red
(FTIR) spectrogram outside, as shown in Figure 8；Coaxial axis method measures sample using Agilent vector network analyzer (PNA 8363B)
Complex dielectric permittivity and complex permeability (ε ', ε ", μ ', μ ") such as Fig. 9, Figure 10, Figure 11, Tu12Suo in 2~18GHz frequency range
Show；Then reflection loss when coating layer thickness is 1mm is calculated according to transmission line theory simulation, as shown in figure 13.
Embodiment 4
A kind of process of the preparation method based on the following 5G mobile communication full frequency bands graphene composite wave-suction material is as follows：
The pre-heat treatment carried out to carbonyl iron dust raw material first, the pre-heat treatment by raw material under protection of argon gas, it is pre- at 100 DEG C
Heat 2 hours；By pellet mass ratio 1:10 are put into 4.9g carbonyl iron dust raw material and bearing steel ball in ball grinder, and wherein bearing steel rolls
Pearl is made of the middle ball of bead and 8mm that diameter is 6mm, and the mass ratio of bead and middle ball is 1:1,0.1g is added into ball grinder
Graphene oxide, 0.1g calcium stearate, and 50mL dehydrated alcohol submergence raw material is added, with glass bar closed loading after mixing evenly
Ball-milling treatment is carried out in pendulum shake ball mill, Ball-milling Time is 2 hours, and ball milling, which changes into the pattern of spherical carbonyl iron powder, to be had
The sheet-like particle of certain draw ratio, while ball milling is but also carbonyl iron dust is uniformly mixed with graphene oxide.It will after the completion of ball milling
The slurry of acquisition is put into vacuum drying box dries 1 hour at 50 DEG C, and carbonyl iron dust and oxygen of the present invention can be obtained
The composite wave-suction material of graphite alkene.
Using scanning electron microscope (SEM, Hitachi S-3400) to the microscopic appearance and Elemental redistribution of composite material
It is characterized, as shown in Figure 5, Figure 7；The Fourier transform for testing acquisition sample using PerkinElmer FTIR (C96926) is red
(FTIR) spectrogram outside, as shown in Figure 8；Coaxial axis method measures sample using Agilent vector network analyzer (PNA 8363B)
Complex dielectric permittivity and complex permeability (ε ', ε ", μ ', μ ") in 2~18GHz frequency range, such as Fig. 9, Figure 10, Figure 11, Figure 12
It is shown；Then reflection loss when coating layer thickness is 1mm is calculated according to transmission line theory simulation, as shown in figure 13.
Fig. 2 is the microscopic appearance before graphene oxide ball milling, and graphene oxide shows as the biggish lamellar morphology of interlamellar spacing.
Fig. 3 is the microscopic appearance before carbonyl iron dust raw material ball milling, it can be seen that carbonyl iron particle has apparent spheric granules.By Fig. 8
And Fig. 5 can be seen that the pattern of graphene composite wave-suction material (embodiment 3,4) after ball milling and change into certain draw ratio
Laminated structure is conducive to break through Snoek limitation；And with the increase of Ball-milling Time, graphene composite wave-suction material (embodiment 4)
Powder particle obviously becomes smaller, and powder is more uniform, advantageously reduces eddy-current loss, to obtain, absorbing property is more excellent to be answered
Close absorbing material.
Mainly there are tri- kinds of elements of C, O, Fe in graphene composite wave-suction material after can be seen that ball milling in Figure 13 and Fig. 7,
This result confirms a large amount of presence of the carbon in the compound of carbonyl iron and graphene oxide, illustrates that graphene oxide exists
The state being evenly distributed in composite material.
The Fourier transform infrared spectroscopy of Fig. 8 can be seen that in about 1640cm-1The peak at place belongs to carbonyl (C=O)；?
3000cm-1~3700cm-1There is a wider, stronger absorption peak, belongs to-OH the stretching vibration of graphene oxide；
1403cm-1The peak value that place occurs belongs to the C-O in carboxyl.For the compound of different Ball-milling Times, there is no bright for characteristic peak
Aobvious variation shows that graphene oxide functional group is not destroyed in the composite.
Fig. 9 can be seen that due to Dispersion, the complex dielectric permittivity real part of composite wave-suction material in 2~18GHz with
The increase of frequency and it is overall reduction trend is presented, and one hour composite wave-suction material of ball milling (is implemented after adding graphene oxide
Example 1) complex dielectric permittivity real part bottom is maintained in 2~18GHz, this helps to improve impedance matching, obtains wave absorbtion
It can better graphene composite wave-suction material.
Figure 10 can be seen that addition 2 hours composite wave-suction materials of graphene oxide ball milling (embodiment 2) and addition aoxidizes
The complex dielectric permittivity imaginary part of 1 hour composite wave-suction material of graphene and calcium stearate ball milling (embodiment 3) in 1~7GHz with
The increase of frequency and be gradually reduced, tend to constant later, biggish fluctuation occur in 12~18GHz.Add graphene oxide and
The complex dielectric permittivity imaginary part of 2 hours composite wave-suction materials of calcium stearate ball milling (embodiment 4) is in about 35 or so fluctuations.Addition
The complex dielectric permittivity of 1 hour composite wave-suction material of graphene oxide ball milling (embodiment 1) is protected in 2~18GHz frequency range
It holds in bottom, the conductivity of carbonyl iron dust is best at this time.
It can be seen from Fig. 9 and Figure 10 compared with 1 hour sample of ball milling, the complex dielectric permittivity of sample after ball milling 2 hours
Real and imaginary parts obviously increase, this is because absorbing material more refines and flaking with the increase of Ball-milling Time,
Intergranular contact surface area increases, and interfacial polarization increases, so that its electric conductivity increases, dielectric constant is also increased with it.
Figure 11 can be seen that due to Dispersion, and the complex permeability real part of composite wave-suction material is in 2~18GHz frequency model
Apparent downward trend is presented with the increase of frequency in enclosing.And frequency is higher decline it is gentler.
Figure 12 can be seen that addition 1 hour composite wave-suction material of graphene oxide ball milling (embodiment 1), addition oxidation
It 2 hours composite wave-suction materials of graphene ball milling (embodiment 2) and addition graphene oxide and calcium stearate ball milling 1 hour answers
Close absorbing material (embodiment 3) complex permeability imaginary part increase in 2~3GHz with the increase of frequency, in 3~18GHz with
The increase of frequency is gradually reduced, and an obvious magnetic loss peak occurs in 3GHz Frequency point, this magnetic loss peak
Occur may be on the one hand demagnetization performance to be reduced, to produce magnetic resonance since the vortex of laminated structure particle is smaller；Separately
It on the one hand may be that there are natural resonance phenomenons in electromagnetic field due to composite powder.Add graphene oxide and stearic acid calcisphere
The complex permeability imaginary part of 2 hours composite wave-suction materials (embodiment 4) of mill is presented in 2~18GHz frequency with the increase of frequency
It is gradually reduced ground trend.
Figure 13 is by electromagnetic field transmission line theory to the carbonyl iron and the compound suction of graphene oxide that coating layer thickness is 1.0mm
The electromagnetic parameter of wave material carries out the reflection of electromagnetic wave damage curve that simulation is calculated.It is apparent that ball milling from figure
The position of the difference of time and calcium stearate levels, reflection loss peak is also different.The reflection loss peak of embodiment 1 is located at 5GHz；
The reflection loss peak of embodiment 2 is located at 4GHz；The reflection loss peak of embodiment 3 is located at 4.4GHz；The reflection loss peak of embodiment 4
Positioned at 3.8GHz.With the variation of Ball-milling Time and calcium stearate levels, reflection loss peak can be mobile from 3.8GHz to 5GHz.
Content by adjusting Ball-milling Time and calcium stearate can obtain various sizes of carbonyl iron and graphene oxide
Compound.The invention can realize the movement of absorption peak in 3.3~5.0GHz frequency range completely, so as to reinforce fixed frequency
On interference electromagnetic wave absorption, the signal-to-noise ratio of the Science in Future in China mobile base station 5G and mobile terminal is effectively improved, to improve use
The communication quality at family.
Claims (10)
1. a kind of preparation method of the graphene composite wave-suction material based on 5G communication, it is characterised in that：The step of this method, is such as
Under：
Step 1: carbonyl iron dust is preheated under protection of argon gas；
Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, ball milling is carried out, when ball milling
Between be 1~3 hour, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 5g: 0.1g: 0.01~0.1g: 40~50mL；
Step 3: the mixed slurry after ball milling is dried in vacuo, graphene composite wave-suction material is obtained.
2. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
Preheating temperature in step 1 is 100~150 DEG C, and preheating time is 1~2 hour.
3. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
In step 2, ball milling be pendulum shake ball mill in be added bearing steel ball carries out, bearing steel ball by diameter 6mm bead with
The middle ball of diameter 8mm forms, and the weight ratio of the two is 1: 1.
4. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
The total weight of carbonyl iron dust, graphene oxide and calcium stearate and the weight ratio of bearing steel ball are 1: 10.
5. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
Vacuum drying temperature described in step 3 is 50~60 DEG C, and soaking time is 1~2 hour.
6. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out ball milling, Ball-milling Time is
1 hour, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.01: 50mL.
7. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out ball milling, Ball-milling Time is
2 hours, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.01: 50mL.
8. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out ball milling, Ball-milling Time is
1 hour, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.1: 50mL.
9. the preparation method of the graphene composite wave-suction material according to claim 1 based on 5G communication, it is characterised in that：
Step 2: after mixing by carbonyl iron dust, graphene oxide, calcium stearate and dehydrated alcohol, carrying out ball milling, Ball-milling Time is
2 hours, obtain mixed slurry；
Carbonyl iron dust, graphene oxide, calcium stearate, dehydrated alcohol proportion be 4.9g: 0.1g: 0.1: 50mL.
10. a kind of application of the graphene composite wave-suction material described in claim 1 based on 5G communication, it is characterised in that：It will
Electromagnetic wave signal of the graphene composite wave-suction material as wave absorbing agent for mobile communication 5G full frequency band absorbs.
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| CN109897597A (en) * | 2019-04-10 | 2019-06-18 | 南京邮电大学 | A kind of corrosion-resistant carbonyl iron/graphene composite wave-suction material preparation method for 5G mobile communication frequency range |
| CN112077298A (en) * | 2020-08-20 | 2020-12-15 | 贺州学院 | ErFe @ GO composite microwave absorbent and preparation method thereof |
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| CN114133739B (en) * | 2021-11-23 | 2022-11-08 | 华南理工大学 | Silicone rubber wave-absorbing composite material and preparation method thereof |
| CN115161531A (en) * | 2022-07-08 | 2022-10-11 | 西安稀有金属材料研究院有限公司 | High-entropy alloy/graphene composite material with wave absorption performance and preparation method thereof |
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