CN107010675A - A kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber and preparation method - Google Patents
A kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber and preparation method Download PDFInfo
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Abstract
A kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber disclosed by the invention is by Ti3SiC2And CoFe2O4It is composited；Invention additionally discloses the preparation method of above-mentioned radio-radar absorber：To Ti3SiC2Powder is pre-processed；Prepare precursor liquid；Utilize pretreated Ti3SiC2Powder and precursor liquid prepare titanium silicon-carbon/Conjugate ferrite precursor sol；Processing is dried to titanium silicon-carbon/Conjugate ferrite precursor sol, titanium silicon-carbon/Conjugate ferrite presoma xerogel is obtained；Titanium silicon-carbon/Conjugate ferrite presoma xerogel is occurred self-propagating combustion reaction, then carry out cooling treatment, finally grind to form and titanium silicon-carbon/Conjugate ferrite radio-radar absorber is obtained after powdery.Titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the present invention, with light weight, the characteristics of there is dielectric loss and magnetic loss simultaneously to electromagnetic wave, preparation method of the invention is simple, be easily achieved.
Description
Technical field
The invention belongs to electromagnetic wave technology field, and in particular to a kind of titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4)
Radio-radar absorber, the invention further relates to the preparation method of above-mentioned titanium silicon-carbon/Conjugate ferrite radio-radar absorber.
Background technology
With the development and the progress of industrial civilization of modern science and technology, the application of various electronic equipments also increasingly increases
Many, it produces increasing electromagnetic radiation and electromagnetic interference is increasingly serious.Meanwhile, Contamination of Electromagnetic Wave has penetrated into the every of life
Individual corner, has severely impacted the psychosomatic health of people.Research has shown that Microwave electromagnetic irradiation can cause biological substrate, maincenter god
Through, the illness of cardiovascular system, crystalline lenses and hematological system.Therefore, how effectively to prevent and eliminate electromagnetic radiation, electromagnetism
The problem of interference work, causes the great attention of countries in the world, the important topic as global scientific and technological circle.
Absorbing material technology electromagnetic pollution can be produced useless and has as a kind of conventional electromagnetism interference means
Harmful electromagnetic energy absorption, conversion, so that it is attenuated.According to wave-absorbing mechanism, absorbing material generally can be divided into dielectric loss type,
Magnetic loss type.The wave-absorbing mechanism of the strong material of the electric conductivity such as conduction high polymer, graphite is mainly electrical loss, including conduction loss and
Dielectric loss two parts, loss is mainly derived from electronic polarization, atom polarization, the sub- orientation polarization of intrinsic electric dipoles and interfacial polarization
Deng；The wave-absorbing mechanism of the magnetic materials such as ferrite, carbonyl iron, nitrided iron, predominantly magnetic loss, magnetic loss particularly may be divided into vortex
Loss, magnetic hystersis loss and residual loss etc..Absorbing material is required to meet the characteristics of thickness of thin, density are low, frequency range is wide and absorbs strong,
But numerous studies show：The wave absorbing agent of single loss-type is difficult the requirement for meeting absorbing material, and reason is due to that they can only be single
Some influence factors in one regulation absorbing material, and two decisive parameters of dielectric constant and magnetic conductivity can not be adjusted simultaneously.
Therefore, there is dielectric loss and the composite of magnetic loss to be only the most effective approach for solving electro-magnetic wave absorption simultaneously for exploitation.
At present, it is more on the report using ferrite as radio-radar absorber, but with Ti3SiC2It is used as the report of absorbent
Road is less, especially by the Ti with dielectric loss characteristicses3SiC2It is combined with the ferrite with magnetic loss characteristic and polynary suction is made
Wave material, can not only reduce the density of absorbent, also widen absorption band, improve assimilation effect.
Chinese invention patent CN105668652A, it is entitled：A kind of charcoal/nickel-zinc ferrite wave absorbing agent and preparation method thereof,
The characteristics of being wherein light weight porous using wood powder, in its area load ferrite presoma xerogel, by presoma xerogel elder generation
Through low temperature presintering, then through high-temperature calcination under hydrogen atmosphere, wood powder is set not have complete oxidation, partial reduction obtains charcoal nickel zinc into charcoal
Ferrite wave absorbing agent.In addition, Chinese invention patent CN106006751A, its is entitled：A kind of nickel-zinc ferrite of cation doping is received
The preparation method of rice material, this method and method described in CN105668652A are essentially identical.As can be seen here：From prior art
From the point of view of, existing to prepare ferritic method and pass through high-temperature calcination substantially, cost is higher, complex process and be unsuitable for industrial life
Production.
The content of the invention
It is an object of the invention to provide a kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber, the microwave absorption light weight,
There is dielectric loss and magnetic loss simultaneously to electromagnetic wave.
Another object of the present invention is to provide the preparation method of above-mentioned titanium silicon-carbon/Conjugate ferrite radio-radar absorber.
The first technical scheme of the present invention is, a kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber by
Ti3SiC2And CoFe2O4It is composited, and Ti3SiC2Mass fraction be 30%~90%, CoFe2O4Mass fraction be 70%
~10%.
Second of technical scheme of the present invention be, the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber,
Specifically implement according to following steps：
Step 1, to Ti3SiC2Powder is pre-processed；
Step 2, treat step 1 after the completion of, prepare precursor liquid；
Step 3, utilize the pretreated Ti obtained through step 13SiC2It is prepared by powder and the precursor liquid prepared through step 2
Go out titanium silicon-carbon/Conjugate ferrite precursor sol；
Step 4, processing is dried to the titanium silicon-carbon/Conjugate ferrite precursor sol obtained through step 3, obtains titanium silicon
Carbon/Conjugate ferrite presoma xerogel；
Step 5, the titanium silicon-carbon that is obtained through step 4/Conjugate ferrite presoma xerogel is first set to occur self-propagating combustion reaction,
Then cooling treatment is carried out, finally grinds to form and titanium silicon-carbon/Conjugate ferrite radio-radar absorber is obtained after powdery.
The characteristics of second of technical scheme of the invention, also resides in：
Step 1 is specifically implemented according to following steps：
Step 1.1, the Ti for taking granularity to be more than 93% for 2 μm~20 μm, purity3SiC2Powder；
Step 1.2, to use concentration be 5vol%~50vol% salpeter solution to the Ti that is obtained in step 1.13SiC2Powder
Body carries out pickling, and pickling time is 10min~30min；
Step 1.3, using volume ratio 1：1~3 ethanol water is to the Ti after step 1.2 pickling3SiC2Powder is carried out
Alcohol is washed, and alcohol washes the time for 10min~30min；
Step 1.4, with deionized water to being washed through step 1.3 alcohol after Ti3SiC2Powder cyclic washing 2~4 times, finally according to
It is secondary through centrifugation, filtering after, be dried in 80 DEG C~100 DEG C, obtain pretreated Ti3SiC2Powder.
Step 2 is specifically implemented according to following steps：
Step 2.1, under normal temperature condition, by CoFe2O4In the molal weight of each metallic element weigh Co and Fe metal
Salt, and be dissolved in water, obtain the mixing salt solution that concentration is 0.04mol/L~0.1mol/L；
Step 2.2, citric acid is added into the mixed salt solution obtained through step 2.1, and stirred, wherein adding
It is 4~6 to enter the amount of citric acid with metal ion Co mol ratio：1, obtain precursor liquid.
Step 3 is specifically implemented according to following steps：
Step 3.1, the pretreated Ti that will be obtained through step 13SiC2Powder is added to the precursor liquid obtained through step 2
In, obtain mixed solution；
Pretreated Ti3SiC2Powder and precursor liquid CoFe2O4Mass ratio be 1~9：1；
Step 3.2, the mixed solution obtained through step 3.1 is placed in temperature in 40 DEG C~60 DEG C water-baths, and in
Stirred under 300r/min~600r/min speed, ammoniacal liquor, regulation mixing is added dropwise dropwise into mixed solution while stirring
The pH of solution to 7~8, continues to stir 2h~6h under 300r/min~600r/min mixing speed, obtains titanium silicon-carbon/cobalt
Ferrite precursor sol.
Step 4 is specifically implemented in accordance with the following methods：
Titanium silicon-carbon/Conjugate ferrite the precursor sol obtained through step 3 is dried into 24h under conditions of 100 DEG C~120 DEG C
~48h, obtains titanium silicon-carbon/Conjugate ferrite presoma xerogel.
Step 5 is specifically implemented in accordance with the following methods：
First by the titanium silicon-carbon/Conjugate ferrite presoma xerogel obtained through step 4 with 4 DEG C/min~6 DEG C/min speed
220 DEG C~250 DEG C are increased to, self-propagating combustion reaction is brought it about；Then cool to room temperature with the furnace, obtain dendritic products；
Finally dendritic products are ground into powder, that is, obtain titanium silicon-carbon/Conjugate ferrite radio-radar absorber.
The beneficial effects of the present invention are：
(1) preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the invention is：First existed using sol-gal process
Ti3SiC2Area load Conjugate ferrite presoma, then prepare Ti through the reaction of citric acid self-propagating combustion3SiC2/CoFe2O4Inhale
Agent is received, the assimilation effect for improving composite is realized finally by dielectric, the cooperative effect of the dual loss of magnetic；Prepared titanium
Silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber has the spy that electromagnetic wave absorption ability is strong and absorption band is wide
Point.
(2) titanium silicon-carbon/Conjugate ferrite (Ti of the invention3SiC2/CoFe2O4) radio-radar absorber preparation method with it is existing
Having technology to compare has obvious advantage, and its innovation is：Using Ti3SiC2Powder and CoFe2O4Answered as raw material
Conjunction prepares radio-radar absorber, makes its impedance matching, electromagnetic wave incident to material surface by adjusting the impedance operator of absorbent
When into material internal and attenuation characteristic can be made it have to greatest extent, into material electromagnetism wave energy rapidly it is almost complete
Portion decays the reflection loss of the composite granule.
(3) titanium silicon-carbon/Conjugate ferrite (Ti of the invention3SiC2/CoFe2O4) radio-radar absorber has good heatproof
Property, ageing-resistant, radioresistance and corrosion resistance, can be used under certain high temperature and corrosive environment.
(4) titanium silicon-carbon/Conjugate ferrite (Ti of the invention3SiC2/CoFe2O4) preparation method of radio-radar absorber is not required to
Carry out high-temperature process, with low cost and save the energy, practicality is big, and whole synthetic reaction process is rapid, typically at several seconds or
Completed in tens seconds, save very much the time.
Brief description of the drawings
Fig. 1 is the XRD of titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the present invention.
Embodiment
With reference to embodiment, the present invention is described in detail.
A kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the present invention is by Ti3SiC2And CoFe2O4It is composited, wherein,
Ti3SiC2Mass fraction be 30%~90%, CoFe2O4Mass fraction be 70%~10%.
Conductance loss-type absorbent Ti3SiC2It is main that loss effect decay electromagnetic wave, magnetic loss type CoFe are led by leakage2O4
Absorbent is by magnetic loss decay electromagnetic wave, by adjusting Ti3SiC2And CoFe2O4Proportioning, make Ti3SiC2/CoFe2O4Electromagnetism
Wave absorbent has the good dual loss characteristic of Jie's electro magnetic, improves the wave absorbing efficiency of material using the synergy of the two, opens up
Wide absorption band.
By titanium silicon-carbon/Conjugate ferrite (Ti of the present invention3SiC2/CoFe2O4) radio-radar absorber and insulating body (including
Ceramic matrix, resin matrix, rubber, paraffin) etc. mixed by a certain percentage, by adjusting Ti3SiC2/CoFe2O4Electromagnetic wave
The content (5wt%~80%) of absorbent adjusts the electromagnetic parameter of composite, can prepare the suction ripple of absorbing property well and answer
Condensation material.
A kind of preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the present invention, specifically implements according to following steps：
Step 1, to Ti3SiC2Powder is pre-processed, and is specifically implemented according to following steps：
Step 1.1, the Ti for taking granularity to be more than 93% for 2 μm~20 μm, purity3SiC2Powder；
Step 1.2, to use concentration be 5vol%~50vol% salpeter solution to the Ti that is obtained in step 1.13SiC2Powder
Body carries out pickling, and pickling time is 10min~30min；
Step 1.3, using volume ratio 1：1~3 ethanol water is to the Ti after step 1.2 pickling3SiC2Powder is carried out
Alcohol is washed, and alcohol washes the time for 10min~30min；
Step 1.4, with deionized water to being washed through step 1.3 alcohol after Ti3SiC2Powder cyclic washing 2~4 times, finally according to
It is secondary through centrifugation, filtering after, be dried in 80 DEG C~100 DEG C, obtain pretreated Ti3SiC2Powder.
Step 2, treat step 1 after the completion of, prepare precursor liquid, specifically implement according to following steps：
Step 2.1, under normal temperature condition, by CoFe2O4In the molal weight of each metallic element weigh Co and Fe metal
Salt, and be dissolved in water, obtain the mixing salt solution that concentration is 0.04mol/L~0.1mol/L；
Step 2.2, citric acid is added into the mixed salt solution obtained through step 2.1, and stirred, wherein adding
It is 4~6 to enter the amount of citric acid with metal ion Co mol ratio：1, obtain precursor liquid.
Step 3, utilize the pretreated Ti obtained through step 13SiC2It is prepared by powder and the precursor liquid prepared through step 2
Go out titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) precursor sol, specifically implement according to following steps：
Step 3.1, the pretreated Ti that will be obtained through step 13SiC2Powder is added to the precursor liquid obtained through step 2
In, obtain mixed solution；
Wherein, pretreated Ti3SiC2Powder and CoFe in precursor liquid2O4Mass ratio be 1~9：1；
Step 3.2, the mixed solution obtained through step 3.1 is placed in temperature in 40 DEG C~60 DEG C water-baths, and in
Stirred under 300r/min~600r/min speed, ammoniacal liquor, regulation mixing is added dropwise dropwise into mixed solution while stirring
The pH of solution to 7~8, continues to stir 2h~6h under 300r/min~600r/min mixing speed, obtains titanium silicon-carbon/cobalt
Ferrite (Ti3SiC2/CoFe2O4) precursor sol.
Step 4, titanium silicon-carbon/Conjugate ferrite (Ti to being obtained through step 33SiC2/CoFe2O4) precursor sol done
Dry processing, obtains titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) presoma xerogel, specifically implement in accordance with the following methods：
By the titanium silicon-carbon/Conjugate ferrite (Ti obtained through step 33SiC2/CoFe2O4) precursor sol is in 100 DEG C~120
24h~48h is dried under conditions of DEG C, titanium silicon-carbon/Conjugate ferrite (Ti is obtained3SiC2/CoFe2O4) presoma xerogel.
Step 5, first make titanium silicon-carbon/Conjugate ferrite (Ti for being obtained through step 43SiC2/CoFe2O4) presoma xerogel hair
Propagating combustion reaction is born from, cooling treatment is then carried out, finally grinds to form and titanium silicon-carbon/Conjugate ferrite (Ti is obtained after powdery3SiC2/
CoFe2O4) radio-radar absorber, specifically implement in accordance with the following methods：
First by the titanium silicon-carbon/Conjugate ferrite (Ti obtained through step 43SiC2/CoFe2O4) presoma xerogel is with 4 DEG C/min
~6 DEG C/min speed is increased to 220 DEG C~250 DEG C, brings it about self-propagating combustion reaction；Then room temperature is cooled to the furnace,
Obtain dendritic products；Finally dendritic products are ground into powder, that is, obtain titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/
CoFe2O4) radio-radar absorber.
Embodiment 1
The Ti for taking granularity to be more than 93% for 2 μm~20 μm, purity3SiC2Powder；Concentration is used for 5vol% salpeter solution
To the Ti of acquirement3SiC2Powder carries out pickling, and pickling time is 10min；Using volume ratio 1：1 ethanol water is to through pickling
Ti afterwards3SiC2Powder carries out alcohol and washed, and alcohol washes the time for 10min；Ti after being washed with deionized water to alcohol3SiC2Powder is washed repeatedly
Wash 2 times, be most dried in 80 DEG C after centrifugation, filtering afterwards, obtain pretreated Ti3SiC2Powder；
In under normal temperature condition, by CoFe2O4In the molal weight of each metallic element weigh Co and Fe metal salt, and respectively
It is dissolved in the water, obtains the mixing salt solution that concentration is 0.04mol/L；Citric acid is added into mixed salt solution, and is stirred
Mix uniform, wherein it is 4 to add the amount of citric acid with metal ion Co mol ratio：1, obtain precursor liquid；
By pretreated Ti3SiC2Powder is added in precursor liquid, obtains mixed solution, wherein pretreated
Ti3SiC2Powder and CoFe in precursor liquid2O4Mass ratio be 9：1；Mixed solution is placed in temperature in 40 DEG C of water-baths, and
Stirred under 300r/min speed, ammoniacal liquor is added dropwise dropwise into mixed solution while stirring, the pH of mixed solution is adjusted
To 7,6h is stirred under the mixing speed for continuing to 300r/min, titanium silicon-carbon/Conjugate ferrite (Ti is obtained3SiC2/CoFe2O4) before
Drive body colloidal sol；
By obtained titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) precursor sol drying under conditions of 120 DEG C
24h, obtains titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) presoma xerogel；
By obtained titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) presoma xerogel is with 4 DEG C/min speed liter
Up to 220 DEG C, bring it about self-propagating combustion reaction；Then cool to room temperature with the furnace, obtain dendritic products；Finally by branch
Shape product is ground into powder, that is, obtains titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber.
By the titanium prepared in the present embodiment silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber powder X
X ray diffractometer x (XRD) carries out material phase analysis, as a result shows product except Ti3SiC2Outside, almost it is all CoFe2O4Phase, such as Fig. 1
In (a) shown in, that illustrate to prepare is titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber.
Embodiment 2
The Ti for taking granularity to be more than 93% for 2 μm~20 μm, purity3SiC2Powder；Use concentration molten for 10vol% nitric acid
Ti of the liquid to acquirement3SiC2Powder carries out pickling, and pickling time is 20min；Using volume ratio 1：2 ethanol water is to through acid
Ti after washing3SiC2Powder carries out alcohol and washed, and alcohol washes the time for 20min；Ti after being washed with deionized water to alcohol3SiC2Powder is repeatedly
Washing 3 times, is most dried in 100 DEG C after centrifugation, filtering afterwards, obtains pretreated Ti3SiC2Powder；
In under normal temperature condition, by CoFe2O4In the molal weight of each metallic element weigh Co and Fe metal salt, and respectively
It is dissolved in the water, obtains the mixing salt solution that concentration is 0.06mol/L；Citric acid is added into mixed salt solution, and is stirred
Mix uniform, wherein it is 5 to add the amount of citric acid with metal ion Co mol ratio：1, obtain precursor liquid；
By pretreated Ti3SiC2Powder is added in precursor liquid, obtains mixed solution, wherein, it is pretreated
Ti3SiC2Powder and CoFe in precursor liquid2O4Mass ratio be 1.5：1；Mixed solution is placed in temperature in 60 DEG C of water-baths,
And stirred under 450r/min speed, ammoniacal liquor is added dropwise dropwise into mixed solution while stirring, regulation mixed solution
3h is stirred under pH to 8, the mixing speed for continuing to 450r/min, titanium silicon-carbon/Conjugate ferrite (Ti is obtained3SiC2/CoFe2O4)
Precursor sol；
By obtained titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) precursor sol drying under conditions of 110 DEG C
30h, obtains titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) presoma xerogel；
By obtained Ti3SiC2/CoFe2O4Presoma xerogel is increased to 240 DEG C with 5 DEG C/min speed, brings it about
Self-propagating combustion reacts；Then cool to room temperature with the furnace, obtain dendritic products；Finally by dendritic products grind into powder
Shape, that is, obtain titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber.
By the titanium prepared in the present embodiment silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber powder X
X ray diffractometer x (XRD) carries out material phase analysis, as a result shows product except Ti3SiC2Outside, almost it is all CoFe2O4Phase, such as Fig. 1
In (b) shown in, that illustrate to prepare is titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber.
Embodiment 3
The Ti for taking granularity to be more than 93% for 2 μm~20 μm, purity3SiC2Powder；Use concentration molten for 20vol% nitric acid
Ti of the liquid to acquirement3SiC2Powder carries out pickling, and pickling time is 30min；Using volume ratio 1：3 ethanol water is to through acid
Ti after washing3SiC2Powder carries out alcohol and washed, and alcohol washes the time for 30min；Ti after being washed with deionized water to alcohol3SiC2Powder is repeatedly
Washing 4 times, is most dried in 120 DEG C after centrifugation, filtering afterwards, obtains pretreated Ti3SiC2Powder；
In under normal temperature condition, by CoFe2O4In the molal weight of each metallic element weigh Co and Fe metal salt, and respectively
It is dissolved in the water, obtains the mixing salt solution that concentration is 0.1mol/L；Citric acid is added into mixed salt solution, and is stirred
Uniformly, wherein it is 6 to add the amount of citric acid with metal ion Co mol ratio：1, obtain precursor liquid；
By pretreated Ti3SiC2Powder is added in precursor liquid, obtains mixed solution, wherein, it is pretreated
Ti3SiC2Powder and CoFe2O4Mass ratio be 2.5：1；Mixed solution is placed in temperature in 55 DEG C of water-baths, and in 600r/
Stirred under min speed, ammoniacal liquor is added dropwise dropwise into mixed solution while stirring, the pH to 7.5 of mixed solution is adjusted, after
2h is stirred under continuous maintenance 600r/min mixing speed, titanium silicon-carbon/Conjugate ferrite (Ti is obtained3SiC2/CoFe2O4) presoma is molten
Glue；
By obtained titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) precursor sol drying under conditions of 100 DEG C
48h, obtains titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) presoma xerogel；
By obtained titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) presoma xerogel is with 6 DEG C/min speed liter
Up to 250 DEG C, bring it about self-propagating combustion reaction；Then cool to room temperature with the furnace, obtain dendritic products；Finally by branch
Shape product is ground into powder, that is, obtains titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber.
By the titanium prepared in the present embodiment silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber powder X
In x ray diffractometer x (XRD) progress material phase analysis, such as Fig. 1 shown in (c), as a result show product except Ti3SiC2Outside, almost it is all
CoFe2O4Phase, that illustrate to prepare is titanium silicon-carbon/Conjugate ferrite (Ti3SiC2/CoFe2O4) radio-radar absorber.
, with light weight, there is dielectric loss simultaneously to electromagnetic wave in titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the present invention
And the characteristics of magnetic loss, the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber of the invention is relatively simple, be easy to real
It is existing.
Claims (7)
1. a kind of titanium silicon-carbon/Conjugate ferrite radio-radar absorber, it is characterised in that by Ti3SiC2And CoFe2O4It is composited, and
The Ti3SiC2Mass fraction be 30%~90%, the CoFe2O4Mass fraction be 70%~10%.
2. a kind of preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber as claimed in claim 1, it is characterised in that
Specifically implement according to following steps：
Step 1, to Ti3SiC2Powder is pre-processed；
Step 2, treat step 1 after the completion of, prepare precursor liquid；
Step 3, utilize the pretreated Ti obtained through step 13SiC2Powder and the precursor liquid prepared through step 2 prepare titanium
Silicon-carbon/Conjugate ferrite precursor sol；
Step 4, processing is dried to the titanium silicon-carbon/Conjugate ferrite precursor sol obtained through step 3, obtains titanium silicon-carbon/cobalt
Ferrite presoma xerogel；
Step 5, the titanium silicon-carbon that is obtained through step 4/Conjugate ferrite presoma xerogel is first set to occur self-propagating combustion reaction, then
Cooling treatment is carried out, finally grinds to form and titanium silicon-carbon/Conjugate ferrite radio-radar absorber is obtained after powdery.
3. the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber according to claim 2, it is characterised in that institute
Step 1 is stated specifically according to following steps to implement：
Step 1.1, the Ti for taking granularity to be more than 93% for 2 μm~20 μm, purity3SiC2Powder；
Step 1.2, to use concentration be 5vol%~50vol% salpeter solution to the Ti that is obtained in step 1.13SiC2Powder enters
Row pickling, pickling time is 10min~30min；
Step 1.3, using volume ratio 1：1~3 ethanol water is to the Ti after step 1.2 pickling3SiC2Powder carries out alcohol
Wash, alcohol washes the time for 10min~30min；
Step 1.4, with deionized water to being washed through step 1.3 alcohol after Ti3SiC2Powder cyclic washing 2~4 times, is finally passed through successively
After centrifugation, filtering, it is dried in 80 DEG C~100 DEG C, obtains pretreated Ti3SiC2Powder.
4. the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber according to claim 2, it is characterised in that institute
Step 2 is stated specifically according to following steps to implement：
Step 2.1, under normal temperature condition, by CoFe2O4In the molal weight of each metallic element weigh Co and Fe metal salt, and
It is dissolved in water, obtains the mixing salt solution that concentration is 0.04mol/L~0.1mol/L；
Step 2.2, citric acid is added into the mixed salt solution obtained through step 2.1, and stirred, wherein adding lemon
The amount of lemon acid is 4~6 with metal ion Co mol ratio：1, obtain precursor liquid.
5. the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber according to claim 2, it is characterised in that institute
Step 3 is stated specifically according to following steps to implement：
Step 3.1, the pretreated Ti that will be obtained through step 13SiC2Powder is added in the precursor liquid obtained through step 2, obtains
To mixed solution；
The pretreated Ti3SiC2Powder and Ti in precursor liquid3SiC2Powder and CoFe2O4Mass ratio be 1~9：1；
Step 3.2, the mixed solution obtained through step 3.1 is placed in temperature in 40 DEG C~60 DEG C water-baths, and in 300r/
Stirred under min~600r/min speed, ammoniacal liquor is added dropwise dropwise into mixed solution while stirring, regulation mixed solution
PH to 7~8, continues to stir 2h~6h under 300r/min~600r/min mixing speed, obtains titanium silicon-carbon/Conjugate ferrite
Precursor sol.
6. the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber according to claim 2, it is characterised in that institute
Step 4 is stated specifically in accordance with the following methods to implement：
By the titanium silicon-carbon/Conjugate ferrite precursor sol obtained through step 3 under conditions of 100 DEG C~120 DEG C dry 24h~
48h, obtains titanium silicon-carbon/Conjugate ferrite presoma xerogel.
7. the preparation method of titanium silicon-carbon/Conjugate ferrite radio-radar absorber according to claim 2, it is characterised in that institute
Step 5 is stated specifically in accordance with the following methods to implement：
First the titanium silicon-carbon/Conjugate ferrite presoma xerogel obtained through step 4 is raised with 4 DEG C/min~6 DEG C/min speed
To 220 DEG C~250 DEG C, self-propagating combustion reaction is brought it about；Then cool to room temperature with the furnace, obtain dendritic products；Finally
Dendritic products are ground into powder, that is, obtain titanium silicon-carbon/Conjugate ferrite radio-radar absorber.
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