CN108610674A - A kind of preparation method of nickel-zinc ferrite antiradar coatings - Google Patents
A kind of preparation method of nickel-zinc ferrite antiradar coatings Download PDFInfo
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- CN108610674A CN108610674A CN201810408741.1A CN201810408741A CN108610674A CN 108610674 A CN108610674 A CN 108610674A CN 201810408741 A CN201810408741 A CN 201810408741A CN 108610674 A CN108610674 A CN 108610674A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention discloses a kind of preparation methods of nickel-zinc ferrite antiradar coatings,By cobalt powder,Ferric nitrate,Nickel nitrate,Zinc nitrate,Polyethylene glycol,Sodium metasilicate,Polyacrylamide,Sodium pyrophosphate,The raw materials such as lanthanum chloride are made,The present invention uses the cobalt powder handled through silane coupling agent to be doped modification to nickel-zinc ferrite,Introduce the compound Ludox of lanthanum chloride again on this basis,The intercalation interleaving effect of polyacrylamide therein and amorphous silicrete,Chelation between lanthanum ion and silicrete is added significantly to colloidal sol consistency,And fill the residual gap of doping nickel-zinc ferrite,Reduce and inhales wave blind spot,Increase and inhales wave grain structure Net magnetic moment,Reinforce the superexchange interaction with tetrahedral interstice magnetic moment,To increase magnetic loss,Improve absorbing property,Thus obtained antiradar coatings are had excellent performance,With good broadband absorbing performance,Wideband and high-absorbable energy can be realized to greatest extent,Preparation method is simple and practical simultaneously,Suitable for industrializing production line operation.
Description
Technical field
The present invention relates to coating material technical field more particularly to a kind of preparation methods of nickel-zinc ferrite antiradar coatings.
Background technology
In today of development in science and technology, mobile phone, computer and all kinds of household electrical appliances are also brought not while bringing people and facilitating
Hold the hazards of electromagnetic radiation ignored, industry, science and Medical Devices also will produce a large amount of electromagnetic radiation during the work time, such as
Fruit is dealt with improperly, can not only be damaged to the working environment of itself, while can also be interfered to the equipment of surrounding, to give
Scientific research, production bring high resistance.In order to reduce its radiation to human body, especially head as far as possible, work(is radiated in addition to reducing
Rate and guarantee reduce the contact with human body when using, it is also contemplated that other safeguard procedures.
Absorbing material technology is by designing and using certain certain materials, weaken, inhibit, absorb, deflecting object electromagnetism
The technology of wave.A kind of antiradar coatings absorbing material good as convenience, economy, adaptability, is initially for space flight, aviation aircraft
Radar-wave absorbing need and develop, but with the development of science and technology and the progress of social economy, antiradar coatings are on ground
Equipment, marine settings also begin to promote and apply on civilian equipment.In recent years, it is always to study to the exploitation of composite wave-suction material
Emphasis.
Ferrite nano absorbing material has the advantages that absorption is strong, frequency band is wider and at low cost, but single ferrite inhales wave
Material is difficult to meet the requirement for inhaling that thickness of convolution degree is thin, quality of materials is light, frequency range is wide, assimilation effect is strong, limits it specific
Application in environment.Additionally due to the size of nano-particle is very small, there is very high surface energy, be a kind of thermodynamic instability
System is easy to be agglomerated into larger particle, and since there are many chemical bonds for nanoparticle surface band, can have very active change
Property is learned, due to magnetic dipole gravitation between particle, easily reunites, is easy to aggregate into offspring, be not easy to disperse, it is therefore desirable to
Other absorbents adjusting electromagnetic parameter is mixed in ferrite makes it preferably be matched, and obtains better wave-absorbing effect.
Invention content
The object of the invention is exactly to provide a kind of preparation of nickel-zinc ferrite antiradar coatings to make up the defect of prior art
Method.
The present invention is achieved by the following technical solutions：
A kind of preparation method of nickel-zinc ferrite antiradar coatings, includes the following steps：
（1）In mass ratio by cobalt powder and silane coupling agent（8-9）：1 mixing, and ultrasonic disperse 30-60 minutes at 20-25kHz,
It filters after the completion, it is dry after being rinsed with clear water, and ball milling crosses 150-200 mesh sieve, and it is spare to obtain pretreatment cobalt powder；
（2）In mass ratio by pretreatment cobalt powder obtained by ferric nitrate, nickel nitrate, zinc nitrate and step 1（6-8）：（5-6）：（5-
6）：（1-3）Mixing is dissolved in the water of 10-15 times of its quality, and the polyethylene glycol of 20-25% mass is added thereto, and ultrasound is extremely divided
It dissipates uniformly, gained mixed liquor is placed in 40-45 DEG C of water-bath, is slowly added to sodium hydroxide solution thereto, and holding pH is 9.5-
10.5, while being stirred continuously 60-90 minutes with 200-300 revs/min, it is spare to obtain precursor mixed solution；
（3）Precursor mixed solution is 6-8 hours still aging, solution is transferred to hydrothermal reaction kettle after removal upper clear supernate
In, crystallization 5-6 hours at 150-180 DEG C, takes out after the completion and be filtered by vacuum and dry, finally smashing into fine powder is adulterated
Nickel-zinc ferrite is spare；
（4）In mass ratio by sodium metasilicate, potassium hydroxide and water（25-28）：（4-5）：（50-60）Magnetic agitation 10-15 after mixing
Minute, it is again heated to 55-65 DEG C, wollastonite powder is added thereto, is persistently stirred 20-40 minutes, and is added successively in whipping process
Enter the polyacrylamide of gross mass 1-1.5%, the sodium pyrophosphate of 0.5-0.8% and the lanthanum chloride of 0.3-0.6%, obtains Ludox
Mixture is spare；
（5）Nickel-zinc ferrite, acetone, Ludox mixture will be adulterated in mass ratio（1-3）：（2-4）：（5-10）It is ultrasonic after mixing
Dispersion, adds the curing agent of gross mass 0.3-0.5%, stirs evenly up to coating of the present invention.
Solvent is placed under 60-70 DEG C of water-bath when ultrasonic disperse in the step 1 and is carried out.
Ferric nitrate in the step 2, nickel nitrate, zinc nitrate, to pre-process the mass ratio of cobalt powder be 8：5：5：2.
First material clear water and absolute ethyl alcohol are cleaned successively before being filtered by vacuum in the step 3, until material is neutrality.
Wollastonite powder addition is the 35-40% of mixed liquor quality in the step 4, and wherein dioxide-containing silica is not less than
85%, specific surface area is not less than 20 every gram of square meters.
Curing agent is any one in ethylenediamine, 3,5- diformazan sulfydryls toluenediamine, diethylenetriamine in the step 5
Kind.
It is an advantage of the invention that：
The present invention uses the cobalt powder handled through silane coupling agent to be doped modification, cobalt powder circle after processing to nickel-zinc ferrite
Face interactive performance increases, it can preferably be promoted to occupy the octahedral interstice in nickel-zinc ferrite particle, reduces Grain-Boundary Phase, into
One step reduces the energy that demagnetizes caused by crystal boundary, to improve the magnetic hystersis loss of material, while reducing ferrous ion to trivalent
The electron mobility of iron ion occurs cavity type conduction, dielectric loss is made to increase, and it is compound to introduce lanthanum chloride again on this basis
Chelating between the intercalation interleaving effect of Ludox, polyacrylamide therein and amorphous silicrete, lanthanum ion and silicrete
Effect is added significantly to colloidal sol consistency, and fills the residual gap of doping nickel-zinc ferrite, reduces and inhales wave blind spot, increases and inhales
Wave grain structure Net magnetic moment reinforces the superexchange interaction with tetrahedral interstice magnetic moment, to increase magnetic loss, improves wave absorbtion
Can, thus obtained antiradar coatings have excellent performance, and have good broadband absorbing performance, can realize to greatest extent wideband and
High-absorbable energy, while preparation method is simple and practical, is suitable for industrialization production line operation.
Specific implementation mode
A kind of preparation method of nickel-zinc ferrite antiradar coatings, includes the following steps：
（1）By cobalt powder and silane coupling agent in mass ratio 9：Solvent is placed under 65 DEG C of water-baths and ultrasonic at 25kHz by 1 mixing
Dispersion 40 minutes, is filtered after the completion, dry after being rinsed with clear water, and ball milling crosses 180 mesh sieve, and it is spare to obtain pretreatment cobalt powder；
（2）Cobalt powder in mass ratio 8 will be pre-processed obtained by ferric nitrate, nickel nitrate, zinc nitrate and step 1：5：5：2 mixing are dissolved in 12
In the water of times its quality, the polyethylene glycol of 23% mass is added thereto, for ultrasound to being uniformly dispersed, gained mixed liquor is placed in 42
In DEG C water-bath, it is slowly added to sodium hydroxide solution thereto, it is 10 to keep pH, while being stirred continuously 75 minutes with 250 revs/min,
It is spare to obtain precursor mixed solution；
（3）By still aging 7 hours of precursor mixed solution, solution is transferred in hydrothermal reaction kettle after removing upper clear supernate,
Crystallization 5 hours at 150 DEG C, material clear water and absolute ethyl alcohol are cleaned successively, until material is neutrality, are taken out after the completion true
Sky is filtered and is dried, finally smashing into fine powder, and it is spare to obtain doping nickel-zinc ferrite；
（4）By sodium metasilicate, potassium hydroxide and water in mass ratio 26：4：Magnetic agitation 13 minutes after 55 mixings, are again heated to 60 DEG C,
Wollastonite powder is added thereto, addition is the 38% of mixed liquor quality, is persistently stirred 30 minutes, and add successively in whipping process
Enter the polyacrylamide of gross mass 1%, 0.6% sodium pyrophosphate and 0.4% lanthanum chloride, it is spare to obtain Ludox mixture；
（5）It will doping nickel-zinc ferrite, acetone, Ludox mixture in mass ratio 2：3：Ultrasonic disperse after 8 mixing adds total
The ethylenediamine of quality 0.4% stirs evenly up to coating of the present invention.
Claims (6)
1. a kind of preparation method of nickel-zinc ferrite antiradar coatings, which is characterized in that include the following steps：
（1）In mass ratio by cobalt powder and silane coupling agent（8-9）：1 mixing, and ultrasonic disperse 30-60 minutes at 20-25kHz,
It filters after the completion, it is dry after being rinsed with clear water, and ball milling crosses 150-200 mesh sieve, and it is spare to obtain pretreatment cobalt powder；
（2）In mass ratio by pretreatment cobalt powder obtained by ferric nitrate, nickel nitrate, zinc nitrate and step 1（6-8）：（5-6）：（5-
6）：（1-3）Mixing is dissolved in the water of 10-15 times of its quality, and the polyethylene glycol of 20-25% mass is added thereto, and ultrasound is extremely divided
It dissipates uniformly, gained mixed liquor is placed in 40-45 DEG C of water-bath, is slowly added to sodium hydroxide solution thereto, and holding pH is 9.5-
10.5, while being stirred continuously 60-90 minutes with 200-300 revs/min, it is spare to obtain precursor mixed solution；
（3）Precursor mixed solution is 6-8 hours still aging, solution is transferred to hydrothermal reaction kettle after removal upper clear supernate
In, crystallization 5-6 hours at 150-180 DEG C, takes out after the completion and be filtered by vacuum and dry, finally smashing into fine powder is adulterated
Nickel-zinc ferrite is spare；
（4）In mass ratio by sodium metasilicate, potassium hydroxide and water（25-28）：（4-5）：（50-60）Magnetic agitation 10-15 after mixing
Minute, it is again heated to 55-65 DEG C, wollastonite powder is added thereto, is persistently stirred 20-40 minutes, and is added successively in whipping process
Enter the polyacrylamide of gross mass 1-1.5%, the sodium pyrophosphate of 0.5-0.8% and the lanthanum chloride of 0.3-0.6%, obtains Ludox
Mixture is spare；
（5）Nickel-zinc ferrite, acetone, Ludox mixture will be adulterated in mass ratio（1-3）：（2-4）：（5-10）It is ultrasonic after mixing
Dispersion, adds the curing agent of gross mass 0.3-0.5%, stirs evenly up to coating of the present invention.
2. the preparation method of nickel-zinc ferrite antiradar coatings according to claim 1, which is characterized in that in the step 1
Solvent is placed under 60-70 DEG C of water-bath when ultrasonic disperse and is carried out.
3. the preparation method of nickel-zinc ferrite antiradar coatings according to claim 1, which is characterized in that in the step 2
Ferric nitrate, nickel nitrate, zinc nitrate, pre-process cobalt powder mass ratio be 8：5：5：2.
4. the preparation method of nickel-zinc ferrite antiradar coatings according to claim 1, which is characterized in that in the step 3
First material clear water and absolute ethyl alcohol are cleaned successively before vacuum filtration, until material is neutrality.
5. the preparation method of nickel-zinc ferrite antiradar coatings according to claim 1, which is characterized in that in the step 4
Wollastonite powder addition is the 35-40% of mixed liquor quality, and wherein dioxide-containing silica is not less than 85%, and specific surface area is not less than 20
Every gram of square meter.
6. the preparation method of nickel-zinc ferrite antiradar coatings according to claim 1, which is characterized in that in the step 5
Curing agent is any one in ethylenediamine, 3,5- diformazan sulfydryls toluenediamine, diethylenetriamine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810408741.1A CN108610674A (en) | 2018-05-02 | 2018-05-02 | A kind of preparation method of nickel-zinc ferrite antiradar coatings |
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| CN201810408741.1A CN108610674A (en) | 2018-05-02 | 2018-05-02 | A kind of preparation method of nickel-zinc ferrite antiradar coatings |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110683796A (en) * | 2019-11-25 | 2020-01-14 | 惠州市中为柔性光电子智能制造研究院有限公司 | Inhomogeneous metamaterial for converging electromagnetic waves |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110683796A (en) * | 2019-11-25 | 2020-01-14 | 惠州市中为柔性光电子智能制造研究院有限公司 | Inhomogeneous metamaterial for converging electromagnetic waves |
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Application publication date: 20181002 |