CN105482111B - A kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3Absorbing material and preparation method - Google Patents
A kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3Absorbing material and preparation method Download PDFInfo
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- CN105482111B CN105482111B CN201511018812.XA CN201511018812A CN105482111B CN 105482111 B CN105482111 B CN 105482111B CN 201511018812 A CN201511018812 A CN 201511018812A CN 105482111 B CN105482111 B CN 105482111B
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Abstract
A kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3Composite granule and preparation method, the present invention is with Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is raw material, using the method for In-situ reaction, is induced by ammonium persulfate when aniline forms long chain and CoFe2O4,Ba0.4Sr0.6TiO3Compound, preparation PANI/xCoFe occurs for powder2O4/(1‑x)Ba0.4Sr0.6TiO3Absorbing material, the present invention prepare trielement composite material PANI/CoFe by in-situ polymerization2O4/Ba0.4Sr0.6TiO3, improve the absorbing property of absorbing material, reduce match materials thickness, composite wave-suction material is obtained optimum organization to greatest extent, so as to meet that multiband, more mechanism absorb, meet combination property requirement of the modern society to absorbing material.
Description
Technical field
The invention belongs to materials science field, is related to a kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3Composite granule and preparation
Method.
Background technology
With the development of scientific and technological progress, the research of absorbing material achieves the still people of important progress, either national defence
Substantial amounts of and fruitful research has all been done to absorbing material.Control electromagnetic interference and dissipation electrostatic charge at present, screen
The most effective means for covering radar emission are to use magnetic or dielectric filler or conduction high polymer.Ferromagnetic conducting polymer and iron
Electrical conduction polymer composites are particularly being studied different types of ferromagnetic and Ferroelectric Composites by sizable concern
Filler.Main challenge is design structure, and structure design has a significant impact to magnetic and dielectric properties.Due to magnetization and electricity
Interaction material between polarization has high magnetic and electric loss as microwave absorption, and in this field, many people are interested at present
Study magnetoelectricity base microwave absorbing material and widen its Absorber Bandwidth.BaTiO3It is a kind of typical perovskite electricity body material, has
There is excellent dielectric polarization effect, therefore the electromagnetic wave of certain wave band can be absorbed, can be used as absorbing material.Jing etc. have studied
The absorbing property of sheet-like barium titanate.Research shows, when annealing temperature is 1000 DEG C, the reflection loss at 12GHz places is-
Absorption band width below 19.6dB, -10dB is 0.8GHz.But single BaTiO3Because absorption band is narrow, it is strong to absorb
Spend weak, it is difficult to meet the currently requirement to absorbing material, can by rear-earth-doped, Morphological control and with other types of absorbent
Its absorbing property of the compound raising of agent.Polyaniline in eigenstate electrical conductivity is very low, and only 10-10S·cm-1, its electrical insulating property is shown,
Without Microwave Absorption Properties, but conductor can be become after protonic acid doping.Faez etc. have studied NBR (the fine rubbers of fourth
Glue)/EPDM (ethylene propylene diene rubber)/PANI blended complex in 8~12GHz absorbing property, shows conducting polymer content
Have a significant impact with coating layer thickness to absorbing property.With polyphenyl amine content increase wave-absorbing effect enhancing, content be 30% when
11~12GHz absorptivity reaches 20dB；And as the increase of thickness, absworption peak move to low frequency.
Ba0.4Sr0.6TiO3And CoFe2O4With many electromagnetic performances, complex permeability and complex dielectric permittivity have non-in high frequency
Often important characteristic, absorbing property is not fine when they are used alone, because the magnetic loss and electrical loss of their own do not have
Reach matching.Polyaniline (PANI) is added in them can improve Ba0.4Sr0.6TiO3And CoFe2O4Electrical loss.Research hair
Existing, the confusion of structure leverages relaxation and the crystal geometry of magnetic oscillation, such as crackle, defect and surface in magnetic material
Roughness, the composite of magnetic particle insertion insulation binding make it more chaotic in the form of filler basal body interface, and this makes
It is more complicated to obtain magnetic relaxation behavior, internally magnetic scope reduces to exchange by region of demagnetizing sends out material with dipolar interaction
Changing.Although some documents about this kind of composite of published in recent years, binary is compound in the majority, and tri compound exists
Relatively low infrared emission field, microwave absorption this respect is also without many reports.
The content of the invention
For the problems of the prior art, it is an object of the invention to provide a kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3
Composite granule and preparation method, the composite granule is in component PANI/0.9CoFe2O4/0.1Ba0.4Sr0.6TiO3When, 3mm is thick to be answered
The absorption maximum of condensation material can reach -30.2dB, and below -10dB absorption band width is 3.4GHz (4.3~7.7GHz).
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3Absorbing material, reaction synthesis expression formula is PANI/xCoFe2O4/(1-
x)Ba0.4Sr0.6TiO3, wherein x is 0.1-0.9.
Reaction synthesis expression formula is PANI/xCoFe2O4/(1-x)Ba0.4Sr0.6TiO3, wherein x is 0.4-0.9.
Reaction synthesis expression formula is PANI/xCoFe2O4/(1-x)Ba0.4Sr0.6TiO3, wherein x is 0.7-0.9.
A kind of PANI/CoFe2O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, comprises the following steps：
1) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in hydrochloric acid, aniline is added after well mixed, in ice
The lower stirring 30-60min of bath, is naturally cooling to subzero, ammonium persulfate solution is added dropwise, drop stirs 8-10h after finishing in ice-water bath, obtained
To mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are 0.1~0.9, benzene
Amine and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is (1~1.5):1；Over cure in ammonium persulfate solution
The mol ratio of sour ammonium and aniline is (1~1.5):1；
2) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black is produced
Thing obtains PANI/xCoFe after drying2O4/(1-x)Ba0.4Sr0.6TiO3Absorbing material.
The Ba0.4Sr0.6TiO3Powder is made by the following method：By chemical general formula Ba0.4Sr0.6TiO3Will be analytically pure
BaCO3、SrCO3And TiO2In 1200 DEG C of pre-burning 4h after ball milling 4-6h, blocks of solid is obtained, mistake after then blocks of solid is crushed
120 mesh sieves obtain the Ba after pre-burning0.4Sr0.6TiO3Powder, then calcine 2h at 1300-1350 DEG C and obtain Ba0.4Sr0.6TiO3Powder
Body.
The concentration of hydrochloric acid is 1~2mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and hydrochloric acid
Ratio is 2g：50mL.
It is well mixed to be carried out under ultrasound.
Rate of addition is that 3s to 5s one drips.
Ammonium persulfate solution is made by dissolving ammonium persulfate into hydrochloric acid, concentration 0.21mol/L.
The drying is in vacuum drying chamber, and 18-24h is dried under the conditions of 60 DEG C.
Compared with prior art, the device have the advantages that：The present invention is with Ba0.4Sr0.6TiO3Powder and CoFe2O4
Powder is raw material, using the method for In-situ reaction, is induced by ammonium persulfate when aniline forms long chain and CoFe2O4,
Ba0.4Sr0.6TiO3Compound, preparation PANI/xCoFe occurs for powder2O4/(1-x)Ba0.4Sr0.6TiO3Absorbing material, the present invention are logical
Cross PANI and other types of absorbent are carried out it is compound, constructed have concurrently dielectric loss and magnetic loss polyaniline it is three-dimensional
Structure, its study of radar absorbing property show, meet the requirement of novel wave-absorbing material " thin, wide, light, strong ".
The composite has excellent absorbing property, and maximum reflection loss reaches -30.3dB, and preparation technology is simple.
In component PANI/0.9CoFe2O4/0.1Ba0.4Sr0.6TiO3When, the absorption maximum of composite thick 3mm can reach-
Absorption band width below 30.2dB, -10dB is 3.4GHz (4.3~7.7GHz).In component PANI/0.7CoFe2O4/
0.3Ba0.4Sr0.6TiO3When thick 3mm composite absorption maximum can reach -30.3dB, below -10dB absorption band is wide
Spend and trielement composite material PANI/CoFe is prepared by in-situ polymerization for 2.3GHz (5.1~7.4GHz), the present invention2O4/
Ba0.4Sr0.6TiO3, improve the absorbing property of absorbing material, reduce match materials thickness, composite wave-suction material is obtained maximum limit
The optimum organization of degree, so as to meet that multiband, more mechanism absorb, meet combination property requirement of the modern society to absorbing material.
Brief description of the drawings
Fig. 1 is that concentration of hydrochloric acid is 2mol/mL, and aniline and ammonium persulfate mol ratio are 1:1, stirring gained powder under condition of ice bath
Body PANI XRD.
Fig. 2 is pure phase Ba prepared by solid phase method0.4Sr0.6TiO3XRD.
Fig. 3 is to work as PANI：(CoFe2O4+Ba0.4Sr0.6TiO3) mass ratio=1:When 1, CoFe2O4Mass percent be
90%, Ba0.4Sr0.6TiO3Mass percent be 10% when composite granule reflection loss figure.
Fig. 4 is to work as PANI：(CoFe2O4+Ba0.4Sr0.6TiO3) mass ratio=1:When 1, CoFe2O4Mass percent be
70%, Ba0.4Sr0.6TiO3Mass percent be 30% when composite granule reflection loss figure.
Fig. 5 is to work as PANI：(CoFe2O4+Ba0.4Sr0.6TiO3) mass ratio=1:When 1, CoFe2O4Mass percent be
50%, Ba0.4Sr0.6TiO3Mass percent be 50% when composite granule reflection loss figure.
Fig. 6 is to work as PANI：(CoFe2O4+Ba0.4Sr0.6TiO3) mass ratio=1:When 1, CoFe2O4Mass percent be
30%, Ba0.4Sr0.6TiO3Mass percent be 70% when composite granule reflection loss figure.
Fig. 7 is to work as PANI：(CoFe2O4+Ba0.4Sr0.6TiO3) mass ratio=1:When 1, CoFe2O4Mass percent be
10%, Ba0.4Sr0.6TiO3Mass percent be 90% when composite granule reflection loss figure.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
The present invention is by aniline and ammonium persulfate according to mol ratio 1：1, it is added in 50mL 2mol/L hydrochloric acid, Ran Hou
8-10h is stirred under condition of ice bath, obtains PANI, wherein, aniline 1g；XRD tests are carried out to PANI, referring to Fig. 1, from Fig. 1
As can be seen that the PANI angles of diffraction of synthesis are about at 22,27 degree or so, and it is consistent with standard PANI peak, illustrate of the invention real
It is consistent with standard PANI peak to apply the PANI in a 1-7.
Embodiment 1
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2It is pre- at 1200 DEG C after ball milling 4h
4h is burnt, obtains blocks of solid, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder,
Then calcine 2h at 1300 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 2mol/L hydrochloric acid, is well mixed under ultrasound
After add aniline, stir 30min under ice bath, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after in ice-water bath
10h is stirred, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are matter
Percentage is measured, and x is 0.9, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1:1；Over cure
The mol ratio of ammonium persulfate and aniline in acid ammonium solution is 1:1；Ammonium persulfate solution is by dissolving ammonium persulfate into hydrochloric acid
It is made, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are 2g：
50mL。
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, black product is obtained, by black
Product dries 18h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple
Material.
Referring to Fig. 2, Fig. 2 is pure phase Ba prepared by solid phase method0.4Sr0.6TiO3XRD, prepare as can be seen from Figure 2
Ba0.4Sr0.6TiO3Powder thing is compared to purer.
From figure 3, it can be seen that the absorption maximum of composite thick 3mm can reach -30.2dB, below -10dB absorption
Frequency bandwidth is 3.4GHz (4.3~7.7GHz).
Embodiment 2
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2It is pre- at 1200 DEG C after ball milling 5h
4h is burnt, obtains blocks of solid, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder,
Then calcine 2h at 1350 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 2mol/L hydrochloric acid, is well mixed under ultrasound
After add aniline, stir 30min under ice bath, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after in ice-water bath
8h is stirred, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are matter
Percentage is measured, and x is 0.7, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1:1；Over cure
The mol ratio of ammonium persulfate and aniline in acid ammonium solution is 1:1；Ammonium persulfate solution is by dissolving ammonium persulfate into hydrochloric acid
It is made, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are 2g：
50mL。
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black is produced
Thing dries 20h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple material
Material.
Referring to Fig. 4, from fig. 4, it can be seen that the absorption maximum of composite thick 3mm can reach -30.3dB, -10dB with
Under absorption band width be 2.3GHz (5.1~7.4GHz).
Embodiment 3
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2It is pre- at 1200 DEG C after ball milling 6h
4h is burnt, obtains blocks of solid, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder,
Then calcine 2h at 1320 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 2mol/L hydrochloric acid, is well mixed under ultrasound
After add aniline, stir 30min under ice bath, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after in ice-water bath
9h is stirred, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are matter
Percentage is measured, and x is 0.5, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1:1；Over cure
The mol ratio of ammonium persulfate and aniline in acid ammonium solution is 1:1；Ammonium persulfate solution is by dissolving ammonium persulfate into hydrochloric acid
It is made, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are 2g：
50mL。
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black is produced
Thing dries 24h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple material
Material.
Referring to Fig. 5, from fig. 5, it can be seen that the absorption maximum of composite thick 3mm can reach -20.2dB, -10dB with
Under absorption band width be 3.2GHz (6.3~9.5GHz).
Embodiment 4
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2It is pre- at 1200 DEG C after ball milling 4h
4h is burnt, obtains blocks of solid, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder,
Then calcine 2h at 1310 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 2mol/L hydrochloric acid, is well mixed under ultrasound
After add aniline, stir 30min under ice bath, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after in ice-water bath
Middle stirring 9h, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are
Mass percent, and x is 0.3, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1:1；Cross
The mol ratio of ammonium persulfate and aniline in ammonium sulfate is 1:1；Ammonium persulfate solution is by dissolving ammonium persulfate into hydrochloric acid
In be made, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are 2g：
50mL。
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black is produced
Thing dries 22h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple material
Material.
Referring to Fig. 6, from fig. 6, it can be seen that the absorption maximum of composite thick 3mm can reach -14.7dB, -10dB with
Under absorption band width be 2.1GHz (10.3~12.4GHz).
Embodiment 5
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2It is pre- at 1200 DEG C after ball milling 5h
4h is burnt, obtains blocks of solid, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder,
Then calcine 2h at 1300 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 2mol/L hydrochloric acid, is well mixed under ultrasound
After add aniline, stir 30min under ice bath, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after in ice-water bath
9h is stirred, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are matter
Percentage is measured, and x is 0.1, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1:1；Over cure
The mol ratio of ammonium persulfate and aniline in acid ammonium solution is 1:1；Ammonium persulfate solution is by dissolving ammonium persulfate into hydrochloric acid
It is made, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are 2g：
50mL。
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, black product is obtained, by black
Product dries 19h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple
Material.
Referring to Fig. 7, from figure 7 it can be seen that composite thick 3mm reaches maximum suction when absorption frequency is 11.5GHz
Receipts -9.3dB.
Embodiment 6
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2At 1200 DEG C after ball milling 4.5h
Pre-burning 4h, blocks of solid is obtained, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder
Body, then calcine 2h at 13020 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 1mol/L hydrochloric acid, is well mixed under ultrasound
After add aniline, stir 45min under ice bath, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after in ice-water bath
10h is stirred, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are matter
Percentage is measured, and x is 0.2, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1.5:1；Cross
The mol ratio of ammonium persulfate and aniline in ammonium sulfate is 1.3:1；Ammonium persulfate solution is by dissolving ammonium persulfate into salt
It is made in acid, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are
2g：50mL.
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black is produced
Thing dries 18h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple material
Material.
Embodiment 7
1) chemical general formula Ba is pressed0.4Sr0.6TiO3By analytically pure BaCO3、SrCO3And TiO2It is pre- at 1200 DEG C after ball milling 6h
4h is burnt, obtains blocks of solid, 120 mesh sieves are crossed after then blocks of solid is crushed and obtain the Ba after pre-burning0.4Sr0.6TiO3Powder,
Then calcine 2h at 1340 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
2) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in 1.5mol/L hydrochloric acid, is mixed under ultrasound equal
Aniline is added after even, 60min is stirred under ice bath, subzero, dropwise addition ammonium persulfate solution is naturally cooling to, in ice-water bath after drop is complete
Middle stirring 8h, obtains mixed solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x are
Mass percent, and x is 0.6, aniline and Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is 1.2:1；
The mol ratio of ammonium persulfate and aniline in ammonium persulfate solution is 1.5:1；Ammonium persulfate solution is by dissolving ammonium persulfate into
It is made in hydrochloric acid, concentration 0.21mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are
2g：50mL.
3) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black is produced
Thing dries 20h under the conditions of 60 DEG C, obtains PANI/xCoFe in vacuum drying chamber2O4/(1-x)Ba0.4Sr0.6TiO3Inhale ripple material
Material.
Traditional electromagnetic shielding material, mainly reach the purpose of shielding by being reflected electromagnetic wave.But quilt
The electromagnetic wave of reflection can still have an impact to the normal work of extraneous electronic device and the health of human body.Therefore, it is necessary to root
According to EM theory and the interaction principle of material and electromagnetic wave, the compound of a variety of different fillers is carried out, to develop to electromagnetism
Ripple has high-selenium corn, the electromagnetic shielding material of low albedo, i.e. absorbing material.The present invention according to EM theory and material with
The interaction principle of electromagnetic wave, the compound of a variety of different fillers is carried out, there is high-selenium corn to electromagnetic wave to develop, low reflection energy
The electromagnetic shielding material of power.
Claims (7)
- A kind of 1. PANI/CoFe2O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, it is characterised in that comprise the following steps：1) by Ba0.4Sr0.6TiO3Powder and CoFe2O4Powder is added in hydrochloric acid, aniline is added after well mixed, under ice bath Stir 30-60min, be naturally cooling to it is subzero, be added dropwise ammonium persulfate solution, drop finish after 8-10h is stirred in ice-water bath, mixed Close solution；Wherein, Ba0.4Sr0.6TiO3Powder and CoFe2O4The mass ratio of powder is (1-x)：X, x be 0.1~0.9, aniline with Ba0.4Sr0.6TiO3Powder and CoFe2O4The ratio of the gross mass of powder is (1~1.5):1；Ammonium persulfate in ammonium persulfate solution Mol ratio with aniline is (1~1.5):1；2) mixed solution is filtered, is washed repeatedly with ultra-pure water until filtrate is in colourless, obtain black product, black product is done PANI/xCoFe is obtained after dry2O4/(1-x)Ba0.4Sr0.6TiO3Absorbing material.
- 2. PANI/CoFe according to claim 12O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, its feature exist In the Ba0.4Sr0.6TiO3Powder is made by the following method：By chemical general formula Ba0.4Sr0.6TiO3By analytically pure BaCO3、 SrCO3And TiO2In 1200 DEG C of pre-burning 4h after ball milling 4-6h, blocks of solid is obtained, 120 mesh sieves are crossed after then blocks of solid is crushed Obtain the Ba after pre-burning0.4Sr0.6TiO3Powder, then calcine 2h at 1300-1350 DEG C and obtain Ba0.4Sr0.6TiO3Powder.
- 3. PANI/CoFe according to claim 12O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, its feature exist In the concentration of hydrochloric acid is 1~2mol/L；Ba0.4Sr0.6TiO3Powder and CoFe2O4The gross mass of powder and the ratio of hydrochloric acid are 2g：50mL.
- 4. PANI/CoFe according to claim 12O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, its feature exist In well mixed to be carried out under ultrasound.
- 5. PANI/CoFe according to claim 12O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, its feature exist In rate of addition is that 3s to 5s one drips.
- 6. PANI/CoFe according to claim 12O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, its feature exist In ammonium persulfate solution is made by dissolving ammonium persulfate into hydrochloric acid, concentration 0.21mol/L.
- 7. PANI/CoFe according to claim 12O4/Ba0.4Sr0.6TiO3The preparation method of absorbing material, its feature exist In the drying is in vacuum drying chamber, and 18-24h is dried under the conditions of 60 DEG C.
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