CN101259463A - Preparation of foam aluminum alloy base wave-absorbing material - Google Patents
Preparation of foam aluminum alloy base wave-absorbing material Download PDFInfo
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- CN101259463A CN101259463A CNA2008100112340A CN200810011234A CN101259463A CN 101259463 A CN101259463 A CN 101259463A CN A2008100112340 A CNA2008100112340 A CN A2008100112340A CN 200810011234 A CN200810011234 A CN 200810011234A CN 101259463 A CN101259463 A CN 101259463A
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Abstract
The invention discloses a preparation method for a foam aluminum alloy-based wave absorbing material and includes the steps of a surface pretreatment of the foam aluminum alloy material, a preparation of wave absorbing agent material and a spraying of the foam aluminum alloy material; the preparation method of the invention is characterized in that the foam aluminum alloy material through degreasing and sand spraying treatments is took as a basic body, and a single wave absorbing material or compound wave absorbing materials are coated on the surface of the basic body to prepare a foam aluminum alloy-based absorbing material of single wave absorbing agent or foam aluminum alloy-based absorbing material of compound wave absorbing agent. The product of the invention provides a new thought for a development of wave absorbing material, and a new field for the popularization and application of foam metal materials and establishes theory and technique foundations for the developing of porous material-based wave absorbing materials.
Description
Technical field
The invention belongs to materials science field, particularly a kind of preparation method of foam aluminum alloy base wave-absorbing material.
Background technology
Absorbing material develops towards the direction of " thin, light, wide, strong ", studies show that, fine and close absorbing material its absorbing property after porous is significantly improved, and the while is the density of lightening material greatly.Yet more rare to the research report of porous absorbing material at present, the analysis of its wave-absorbing mechanism also is in the elementary step.Porous foam metal material is a kind of novel porous light metal material, people's system research performances such as its damping, shock resistance, sound absorption damping, electromagnetic wave shielding, also few people study its absorbing property.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of foam aluminum alloy base wave-absorbing material, especially a kind of in the method for porous foam aluminum alloy material surface coating antiradar coatings with acquisition novel light absorbing material.
Studies show that relative density is 0.111～0.185, average pore size is that the foam aluminium alloy material of 6～7mm possesses certain absorbing property at Ka wave band electromagnetic wave (frequency range is at the electromagnetic wave of 26.5～40GHz '), and after its surface applies dielectric type wave absorbing agent, resistor-type wave absorbing agent and magnetizing mediums type wave absorbing agent respectively, can bring into play loose structure and antiradar coatings simultaneously to absorption of electromagnetic wave loss effect, make material obtain to be lower than-the suction ripple usefulness of 10dB, the composite wave-absorbing agent is coated on the foam aluminium alloy surface, and it is inhaled ripple usefulness and can be further enhanced.
The present invention is that 0.148～0.185 foam aluminium alloy is as matrix material with relative density, apply resistor-type wave absorbing agent (carborundum or polyaniline), dielectric type wave absorbing agent (barium titanate) and magnetizing mediums type wave absorbing agent (Ni-Zn ferrite or carbonyl nickel) respectively on its surface, be prepared into single wave absorbing agent foam aluminum alloy base wave-absorbing material, the absorbing property of this absorbing material of test analysis; On this basis magnetizing mediums type wave absorbing agent and polyaniline wave absorbing agent are coated on the foam aluminium alloy surface, are prepared into composite wave-absorbing agent foam aluminum alloy base wave-absorbing material, the absorbing property of foam aluminum alloy base wave-absorbing material is further improved.
Technical scheme of the present invention is:
1, the surface preparation of porous foam aluminium alloy:
1.1 foam aluminium alloy matrix surface ungrease treatment: adopt foam aluminium alloy as matrix, wash away the foam aluminium alloy matrix with room temperature cold water, remove the mechanical chip that partly residues in surface and the hole, use air compressor then, at expulsion pressure is under the condition of 0.8Mpa, spray alkali lye and clean the foam aluminium alloy matrix surface, alkali liquid temperature is controlled at 60 ± 3 ℃, to prevent that the foam aluminum alloy base surface is by etch; Use the room temperature cold water flush immediately after spraying alkali lye, clean 15min with ultrasonic cleaner then, frequency of utilization 40KHz; Use deionized water hydro-peening surface again, to remove residual alkali lye; Shorten surface drying time with hair dryer, globule generation alkali lye when oven dry of avoiding hanging concentrates and the etch surface, cleans the back 100 ℃ of oven dry down.
1.2 the blasting treatment of foam aluminium alloy matrix: after the ungrease treatment of foam aluminium alloy matrix, adopt sand-blasting machine to carry out the particulate sandblast, wherein quartzy sand grains diameter is less than 100 μ m, compressed air source 3.0～7.0kg/cm
2, the about 100～150mm of command range in the sandblast, the distance and the blasting pressure of control spray gun and foam aluminium alloy matrix do not destroy the foam aluminium alloy matrix surface as far as possible in the sandblast process.
After sandblast finishes,, rinse out foam aluminium alloy matrix surface and intrapore sand grains, dry up with hair dryer at last, finish the surface preparation of foam aluminium alloy matrix with absolute ethyl alcohol hydro-peening repeatedly.
2, the preparation of single antiradar coatings:
2.1 the coupling preliminary treatment of wave absorbing agent filler:
Add coupling agent (silane coupler or titanate coupling agent) in wave absorbing agent (carborundum, polyaniline, barium titanate, Ni-Zn ferrite, carbonyl nickel or nanometer cobalt) filler powder, the coupling agent consumption is 3% of a wave absorbing agent filler powder amount.(diluent is a n-butanol: dimethylbenzene: the 1ml when mixed liquor of propylene glycol monomethyl ether=6: 4: 1, consumption are the every 4g of wave absorbing agent filler powder), the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min to add diluent then.
2.2 the dispersion of wave absorbing agent filler:
(diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1 with diluent with dispersant (B401, B402, CH-10S, CH-13F, CH-13, T70 or 963), 1ml when consumption is the every 4g of wave absorbing agent filler powder) dilution, the consumption of dispersant is 2% mass percent of whole wave absorbing agent fillers, pour in pretreated wave absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
2.3 the preparation of film forming matter:
Epoxy resin of binder (accounting for 30% mass percent of filler and binding agent total amount) is mixed by mass ratio with the curing agent polyamide at 2: 1, be prepared into film forming matter.
2.4 the preparation of antiradar coatings:
The film forming matter and the scattered single wave absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with high-shearing dispersion emulsifying machine with 10000r/min speed then, again through ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min, continue to stir 10min with high-shearing dispersion emulsifying machine with 10000r/min speed and disperse.In order to obtain fine and smooth more, few impurity, bubble-free coating, at last coating is sieved with 120 purpose screen clothes, be prepared into single antiradar coatings.
3, the preparation of composite wave-absorbing coating:
3.1 the preparation of composite wave-absorbing agent filler:
At two kinds of wave absorbing agent filler (polyanilines, Ni-Zn ferrite or carbonyl nickel) in main component (the wave absorbing agent filler composition that mass percent is high) in add coupling agent (silane coupler or titanate coupling agent), the coupling agent consumption is 3% of this wave absorbing agent filler powder amount, with absolute ethyl alcohol (the absolute ethyl alcohol consumption is as the criterion with abrading-ball in the submergence ball grinder and filler) is medium, put into the speed ball milling wet mixing 30min of ball grinder together with 120r/min, then second component (the low wave absorbing agent filler composition of key component mass percent relatively) is added in the ball grinder, with the speed ball milling wet mixing 5h of 120r/min; With the drying materials after the wet mixing, remove absolute ethyl alcohol again, put into ball grinder and do mixed 5h with the speed ball milling of 120r/min.
3.2 the coupling preliminary treatment of composite wave-absorbing agent filler:
Add coupling agent (silane coupler or titanate coupling agent) in the composite wave-absorbing agent filler powder for preparing, the coupling agent consumption is 3% of a composite wave-absorbing agent filler total amount.(diluent is a n-butanol: dimethylbenzene: the 1ml when mixed liquor of propylene glycol monomethyl ether=6: 4: 1, consumption are the every 4g of wave absorbing agent filler powder), the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min to add diluent then.
3.3 the dispersion of composite wave-absorbing agent filler
(diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1 with diluent with dispersant, 1ml when consumption is 4g for the wave absorbing agent filler powder) dilution, the consumption of dispersant is 2% mass percent of whole wave absorbing agent fillers, pour in pretreated composite wave-absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
3.4 the preparation of film forming matter
Epoxy resin of binder (accounting for 30% mass percent of filler and binding agent total amount) is mixed by mass ratio with the curing agent polyamide at 2: 1, be prepared into film forming matter.
3.5 the preparation of composite wave-absorbing coating
The film forming matter and the scattered composite wave-absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then, again through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min, continue to stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and disperse.In order to obtain fine and smooth more, few impurity, bubble-free coating, at last coating is sieved with 120 purpose screen clothes, be prepared into composite wave-absorbing coating.
4, the external coating of foam aluminium alloy matrix:
Use air compressor and spray gun as aerial spraying equipment, single or the composite wave-absorbing coating that will prepare in fume hood is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g, need in the spraying process to spray repeatedly, guarantee that antiradar coatings is coated on each hole of foam aluminium alloy matrix uniformly from all directions.Foam aluminium alloy matrix after the spraying places blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for foam aluminium alloy matrix after spraying and curing are finished.The foam aluminum alloy base that wherein applies single wave absorbing agent is single wave absorbing agent foam aluminum alloy base wave-absorbing material, and the foam aluminum alloy base that applies the composite wave-absorbing agent is a composite wave-absorbing agent foam aluminum alloy base wave-absorbing material.
The reflection of electromagnetic wave rate test result of single wave absorbing agent foam aluminum alloy base wave-absorbing material shows that the absorbing property of absorbing material increases along with the increase of microwave frequency, does not have tangible peak value in the test frequency range, demonstrates the characteristics of material wideband.The reflection of electromagnetic wave rate test result of composite wave-absorbing agent foam aluminum alloy base wave-absorbing material shows, the absorbing property of composite wave-suction material is further improved, wherein the composite wave-absorbing agent foam aluminium alloy sill of surface-coated Ni-Zn ferrite wave absorbing agent and carbonyl nickel wave absorbing agent (Ni-Zn ferrite and carbonyl nickel mass ratio are 3: 2) has demonstrated excellent absorbing property, and the composite wave-absorbing agent foam aluminum alloy base wave-absorbing material of surface-coated polyaniline wave absorbing agent and carbonyl nickel wave absorbing agent (polyaniline and carbonyl nickel mass ratio are 1: 2) is in 26.5～40.0GHz frequency range build-in test reflection of electromagnetic wave rate, be lower than-bandwidth of 10dB can reach 3.18GHz.
Porous foam metal material has characteristics such as lightweight, high porosity, mechanical property excellence, by the research to porous foam metal material electro-magnetic wave absorption performance, is expected to obtain the absorbing material of efficient and light weight, has important theory and practice significance.Experimental study shows, the absorbing property of porous foam metal material in microwave frequency range is limited, in order further to improve the absorbing property of material, the present invention proposes method at its surface-coated antiradar coatings, test result shows that the absorbing property of material is improved, and possesses actual application value.In addition, because defectives such as hole, crack appear in porous foam metal material in process of production inevitably, its impurity component is also more, for its plating work brings very big difficulty.The present invention has optimized the absorbing property of foam aluminium alloy on the one hand at foamed aluminium surface-coated antiradar coatings, and also beautifying work for the outward appearance of foam aluminium alloy on the other hand provides useful exploration experience.
Characteristics of the present invention are first from the angle of the electromaganic wave absorbing property of porous foam metal material, and the painting method that this novel foam metal material and tradition is easy combines, thereby has obtained to possess the novel light absorbing material of absorbing property.The present invention not only is the new field of having opened up of applying of porous foam metal material, and also the development for the novel light absorbing material provides useful exploration experience.
Description of drawings
Fig. 1 is a foam aluminium alloy surface preparation schematic flow sheet.
Fig. 2 has applied the painting effect figure of the foam aluminum alloy base wave-absorbing material behind the wave absorbing agent for the foam aluminium alloy material surface.
Fig. 3 is the microwave-reflectance curve of surperficial single wave absorbing agent foam aluminum alloy base wave-absorbing material in the test frequency range, and foam aluminium alloy matrix relative density is 0.148～0.185.CfBa represents the microwave-reflectance curve of barium titanate wave absorbing agent foam aluminum alloy base wave-absorbing material, CfSi represents to cover the microwave-reflectance curve of carborundum wave absorbing agent foam aluminum alloy base wave-absorbing material, CfFe represents the microwave-reflectance curve of Ni-Zn ferrite wave absorbing agent foam aluminum alloy base wave-absorbing material, CfNi represents the microwave-reflectance curve of carbonyl nickel wave absorbing agent foam aluminum alloy base wave-absorbing material, and CfP represents the microwave-reflectance curve of polyaniline wave absorbing agent foam aluminum alloy base wave-absorbing material.
Fig. 4 is the microwave-reflectance curve of 0.148～0.185 composite wave-absorbing agent foam aluminum alloy base wave-absorbing material (surface-coated Ni-Zn ferrite and carbonyl nickel mass ratio are 3: 2 composite wave-absorbing agent foam aluminum alloy base wave-absorbing material) for relative density,
Fig. 5 is the microwave-reflectance curve of 0.178～0.185 composite wave-absorbing agent foam aluminum alloy base wave-absorbing material (surface-coated polyaniline and carbonyl nickel mass ratio are 1: 2 composite wave-absorbing agent foam aluminum alloy base wave-absorbing material) for relative density.
The specific embodiment
Following wave absorbing agent filler, dispersant, diluent, binding agent, curing agent, coupling agent and the foam aluminium alloy material that adopts for embodiment:
Adopt carborundum, polyaniline, barium titanate, Ni-Zn ferrite or carbonyl nickel as the wave absorbing agent filler.Wherein carborundum purity is greater than 95%, fineness 1～2 μ m; Polyaniline purity is greater than 98.0%, and fineness is less than 30 μ m; Barium titanate purity is greater than 99.9%, fineness 90nm; Ni-Zn ferrite fineness 320 orders; Carbonyl nickel purity is greater than 99.6%, fineness 2.2～2.8 μ m.
Adopt dispersant B 401, B402, CH-10S, CH-13F, CH-13, T70 or 963 as dispersant.Wherein B401 and B402 are Germany bright good chemical reagent Co., Ltd product, and CH-10S, CH-13F and CH-13 are ShangHai SanZheng polymer Materials Co., Ltd's product, and T70 and 963 is Shenzhen Haichuan Chemical Technology Co., Ltd's product.
The mixed solution that adopts n-butanol, dimethylbenzene and propylene glycol monomethyl ether is as diluent, and wherein n-butanol, dimethylbenzene and propylene glycol monomethyl ether purity are pure for analyzing.
Adopt 6101 epoxy resin as binding agent, blue star new material Wuxi naval stores; Polyamide is as curing agent, Tianjin, Tianjin peaceful three and chemical Co., Ltd product.
The silane coupler that adopts is KH-550, Qufu City Wanda chemical industry Co., Ltd product; Titanate coupling agent is JN-115, JN-108, JN-198 or JN-644, the anti-auxiliary agent of Changzhou Ji Co., Ltd product.
The relative density of foam aluminium alloy material is 0.148～0.185, and average pore size is 6～7mm, and the foam aluminium alloy material appearance is of a size of 80mm * 80mm.
Embodiment 1:
The employing apparent size is 80mm * 80mm, relative density is 0.148～0.185, average pore size is that the foam aluminium alloy of 6～7mm is as matrix, wash away the foam aluminium alloy matrix with room temperature cold water, remove the mechanical chip that partly residues in surface and the hole, use JD-2025B type air compressor then, at expulsion pressure is under the condition of 0.8Mpa, spray alkali lye and clean the foam aluminium alloy matrix surface, alkali liquid temperature is controlled at 60 ± 3 ℃, to prevent that the foam aluminum alloy base surface is by etch; Use the room temperature cold water flush immediately after spraying alkali lye, clean 15min, frequency of utilization 40KHz with the KQ-100 ultrasonic cleaner then; Use deionized water hydro-peening surface again, to remove residual alkali lye; Shorten surface drying time with hair dryer, globule generation alkali lye when oven dry of avoiding hanging concentrates and the etch surface, cleans the back 100 ℃ of oven dry down.
After the ungrease treatment of foam aluminium alloy matrix, adopt the 9070W wet abrasive blasting machine to carry out the particulate sandblast, wherein quartzy sand grains diameter is less than 100 μ m, compressed air source 3.0～7.0kg/cm
2, the about 100～150mm of command range in the sandblast finishes the preliminary treatment of foam aluminium alloy matrix surface.
Get 20g polyaniline wave absorbing agent as the antiradar coatings filler, in the polyaniline wave absorbing agent, add silane resin acceptor kh-550, coupling agent KH-550 consumption is 0.6g, the diluent that adds 5ml then, diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1, the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min.
With 0.4g dispersing agent C H-10S with the 5ml diluent (n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1), pour in pretreated wave absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 8.25g, are prepared into film forming matter.
The film forming matter and the scattered polyaniline wave absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into the polyaniline antiradar coatings.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood, the polyaniline antiradar coatings for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for polyaniline wave absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
CfP curve among Fig. 3 is the microwave-reflectance curve of polyaniline wave absorbing agent foam aluminum alloy base wave-absorbing material, and wave-absorbing effect is best in numerous wave absorbing agent foam aluminium alloy materials, can reach-12.5dB, be lower than-bandwidth of 10dB reaches 5.5GHz.
Embodiment 2:
The employing apparent size is 80mm * 80mm, and relative density is 0.148～0.185, average pore size be the foam aluminium alloy of 6～7mm as matrix, the pretreated method of foam aluminium alloy matrix surface is with embodiment 1.
Get 20g carborundum wave absorbing agent as the antiradar coatings filler, in the carborundum wave absorbing agent, add titanate coupling agent JN-108, coupling agent JN-108 consumption is 0.6g, the diluent that adds 5ml then, diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1, the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min.
With 0.4g dispersing agent C H-13F with the 5ml diluent (n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1), pour in pretreated wave absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 8.25g, are prepared into film forming matter.
The film forming matter and the scattered carborundum wave absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into the carborundum antiradar coatings.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood, the carborundum antiradar coatings for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for carborundum wave absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
CfSi curve among Fig. 3 is the microwave-reflectance curve of carborundum wave absorbing agent foam aluminum alloy base wave-absorbing material, and it is inhaled ripple usefulness and has reached-7.8dB.
Embodiment 3:
The employing apparent size is 80mm * 80mm, and relative density is 0.148～0.185, average pore size be the foam aluminium alloy of 6～7mm as matrix, the pretreated method of foam aluminium alloy matrix surface is with embodiment 1.
Get 20g barium titanate wave absorbing agent as the antiradar coatings filler, in the barium titanate wave absorbing agent, add titanate coupling agent JN-198, coupling agent JN-198 consumption is 0.6g, the diluent that adds 5ml then, diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1, the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min.
With 0.4g dispersing agent C H-13 with the 5ml diluent (n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1), pour in pretreated wave absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 8.25g, are prepared into film forming matter.
The film forming matter and the scattered barium titanate wave absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into the barium titanate antiradar coatings.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood, the barium titanate antiradar coatings for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for barium titanate wave absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
CfBa curve among Fig. 3 is the microwave-reflectance curve of barium titanate wave absorbing agent foam aluminum alloy base wave-absorbing material, and it is inhaled ripple usefulness and has only reached-3dB.
Embodiment 4:
The employing apparent size is 80mm * 80mm, and relative density is 0.148～0.185, average pore size be the foam aluminium alloy of 6～7mm as matrix, the pretreated method of foam aluminium alloy matrix surface is with embodiment 1.
Get 20g Ni-Zn ferrite wave absorbing agent as the antiradar coatings filler, in Ni-Zn ferrite wave absorbing agent, add titanate coupling agent JN-644, coupling agent JN-644 consumption is 0.6g, the diluent that adds 5ml then, diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1, the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min.
With 0.4g dispersant T70 with the 5ml diluent (n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1), pour in pretreated wave absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 8.25g, are prepared into film forming matter.
The film forming matter and the scattered Ni-Zn ferrite barium wave absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into Ni-Zn ferrite antiradar coatings.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood, the Ni-Zn ferrite antiradar coatings for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for Ni-Zn ferrite wave absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
CfFe curve among Fig. 3 is the microwave-reflectance curve of Ni-Zn ferrite wave absorbing agent foam aluminum alloy base wave-absorbing material, and it is inhaled ripple usefulness and reaches-9.5dB.
Embodiment 5:
The employing apparent size is 80mm * 80mm, and relative density is 0.148～0.185, average pore size be the foam aluminium alloy of 6～7mm as matrix, the pretreated method of foam aluminium alloy matrix surface is with embodiment 1.
Get 20g carbonyl nickel wave absorbing agent as the antiradar coatings filler, in the carbonyl nickel wave absorbing agent, add silane resin acceptor kh-550, coupling agent KH-550 consumption is 0.6g, the diluent that adds 5ml then, diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1, the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min.
With 0.4g dispersant B 401 usefulness 5ml diluents (n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1), pour in pretreated wave absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of wave absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 8.25g, are prepared into film forming matter.
The film forming matter and the scattered carbonyl nickel barium wave absorbing agent filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into the carbonyl nickel antiradar coatings.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood, the carbonyl nickel antiradar coatings for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for carbonyl nickel wave absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
CfNi curve among Fig. 3 is the microwave-reflectance curve of carbonyl nickel wave absorbing agent foam aluminum alloy base wave-absorbing material, and absorbing property is better, can reach-11.5dB, be lower than-the 10dB bandwidth reaches 2.6GHz.
Embodiment 6:
The employing apparent size is 80mm * 80mm, and relative density is 0.148～0.185, average pore size be the foam aluminium alloy of 6～7mm as matrix, the pretreated method of foam aluminium alloy matrix surface is with embodiment 1.
Get 30g Ni-Zn ferrite wave absorbing agent as the antiradar coatings filler, in Ni-Zn ferrite wave absorbing agent, add the JN-115 titanate coupling agent, coupling agent JN-115 consumption is 0.9g, with the 400ml absolute ethyl alcohol is medium, put into 2 liters ball grinder ball milling wet mixing 30min together, then 20g carbonyl nickel wave absorbing agent is added in the ball grinder ball milling wet mixing 5h; With the drying materials after the wet mixing, remove absolute ethyl alcohol again, put into the ball grinder ball milling and do mixed 5h, be prepared into Ni-Zn ferrite-carbonyl nickel composite wave-absorbing agent filler.
In Ni-Zn ferrite-carbonyl nickel composite wave-absorbing agent filler, add the 1.5g silane resin acceptor kh-550, (diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1), the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min to add the diluent of 12.5ml then.
(diluent is a n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1) with 1.0g dispersant 963 usefulness 12.5ml diluents, pour in pretreated Ni-Zn ferrite-carbonyl nickel composite wave-absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of composite wave-absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 22g, are prepared into film forming matter.
The film forming matter and the scattered compound barium wave absorbing agent of the Ni-Zn ferrite-carbonyl nickel filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into Ni-Zn ferrite-carbonyl nickel composite wave-absorbing coating.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood the Ni-Zn ferrite-carbonyl nickel composite wave-absorbing coating for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for Ni-Zn ferrite-carbonyl nickel composite wave-absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
Fig. 4 be Ni-Zn ferrite-carbonyl nickel composite wave-absorbing agent foam aluminum alloy base wave-absorbing material microwave-reflectance curve, it is better that it inhales ripple usefulness, can reach-16dB, is lower than-bandwidth of 10dB reaches 7GHz.
Embodiment 7:
The employing apparent size is 80mm * 80mm, and relative density is 0.178～0.185, average pore size be the foam aluminium alloy of 6～7mm as matrix, the pretreated method of foam aluminium alloy matrix surface is with embodiment 1.
Get 20g carbonyl nickel wave absorbing agent as the antiradar coatings filler, in the carbonyl nickel wave absorbing agent, add the KH-550 silane coupler, coupling agent KH-550 consumption is 0.6g, with the 400ml absolute ethyl alcohol is medium, put into 2 liters ball grinder ball milling wet mixing 30min together, then 10g polyaniline wave absorbing agent is added in the ball grinder ball milling wet mixing 5h; With the drying materials after the wet mixing, remove absolute ethyl alcohol again, put into the ball grinder ball milling and do mixed 5h, be prepared into carbonyl nickel-polyaniline composite wave-absorbing agent filler.
In carbonyl nickel-polyaniline composite wave-absorbing agent filler, add the 0.9g silane resin acceptor kh-550, (diluent is a n-butanol: dimethylbenzene: the mixed liquor of propylene glycol monomethyl ether=6: 4: 1), the speed with 10000r/min in the high shear force dispersion emulsifying machine stirs 30min to add the diluent of 7.5ml then.
(diluent is a n-butanol: dimethylbenzene: the dilution mixed liquor of propylene glycol monomethyl ether=6: 4: 1) with 0.6g dispersant B 402 usefulness 7.5ml diluents, pour in pretreated carbonyl nickel-polyaniline composite wave-absorbing agent filler mixed grinding in glass mortar into, finish the dispersion of composite wave-absorbing agent filler.
Binding agent 6101 epoxy resin are mixed by mass ratio with the curing agent polyamide at 2: 1, and 6101 content of epoxy resin are 12.85g, are prepared into film forming matter.
The film forming matter and the scattered compound barium wave absorbing agent of the carbonyl nickel-polyaniline filler that prepare are mixed back grinding 5min, stir 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed then; Through the KQ-100 ultrasonic cleaner, under the condition of frequency 40KHz, supersonic oscillations are disperseed 20min again; Continuation is stirred 10min with the FA25 high-shearing dispersion emulsifying machine with 10000r/min speed and is disperseed; At last coating is sieved with 120 purpose screen clothes, be prepared into carbonyl nickel-polyaniline composite wave-absorbing coating.
Use JD-2025B type air compressor and bore as the W-71G spray gun of 1.5mm as aerial spraying equipment, in fume hood the carbonyl nickel-polyaniline composite wave-absorbing coating for preparing is sprayed on the foam aluminium alloy matrix of finishing surface preparation, quantity for spray is 20g.Foam aluminium alloy matrix after the spraying places 101-1 type blast drier to be cured, and solidification temperature is 60 ℃, and be 1h hardening time.
Promptly as the absorbing material model of reflection of electromagnetic wave rate test, test is at the reflectivity of Ka wave band (frequency range is at the electromagnetic wave of 26.5～40GHz) for carbonyl nickel-polyaniline composite wave-absorbing agent foam aluminium alloy matrix after after spraying and curing are finished.
Fig. 5 be carbonyl nickel-polyaniline composite wave-absorbing agent foam aluminum alloy base wave-absorbing material microwave-reflectance curve, it is lower than-bandwidth of 10dB reaches 3.18GHz, inhale ripple usefulness and reach-13.03dB.
Claims (8)
1, a kind of preparation method of foam aluminum alloy base wave-absorbing material, comprise the surface preparation of foam aluminium alloy material, the preparation of wave absorbing agent coating and the spraying step of foam aluminium alloy material, it is characterized in that: with the foam aluminium alloy material through ungrease treatment and blasting treatment is matrix, at single antiradar coatings of its surface-coated or composite wave-absorbing coating, be prepared into single wave absorbing agent foam aluminum alloy base wave-absorbing material or composite wave-absorbing agent foam aluminum alloy base wave-absorbing material.
2, the preparation method of a kind of foam aluminum alloy base wave-absorbing material of narrating according to claim 1, it is characterized in that the surperficial ungrease treatment of foam aluminium alloy material: be that 0.148～0.185 foam aluminium alloy is as the foam aluminium alloy sill with relative density, at first wash away the foam aluminium alloy material with room temperature cold water, utilize high-pressure injection alkali lye to clean the foam aluminium alloy material surface then, alkali liquid temperature need be controlled at 60 ± 3 ℃; Clean 15min, deionized water hydro-peening foam aluminium alloy material surface through room temperature cold water flush, ultrasonic wave then, to remove residual alkali lye; Dry up the foam aluminium alloy material with hair dryer again, then 100 ℃ of oven dry down.
3, the preparation method of a kind of foam aluminum alloy base wave-absorbing material of narrating according to claim 1, the surface sand-blasting that it is characterized in that the foam aluminium alloy material is handled: carry out the particulate sandblast with wet abrasive blasting machine, wherein quartzy sand grains diameter is less than 100 μ m, compressed air source 3.0～7.0kg/cm
2, the about 100～150mm of command range in the sandblast.
4, a kind of foam aluminium alloy of narrating according to claim 1 is inhaled the first-harmonic preparation methods, it is characterized in that the preparation of single wave absorbing agent coating: the wave absorbing agent filler is carried out carrying out coupling processing with coupling agent, the coupling agent consumption is 3% of a wave absorbing agent filler, add dispersant then through the diluent dilution, dispersant dosage is 2% of a wave absorbing agent filler, ground and mixed in glass mortar; Then the film forming matter for preparing is added the wave absorbing agent filler through disperseing, the binding agent consumption is 30% of binding agent and a wave absorbing agent filler total amount in the film forming matter, ground and mixed in glass mortar; With the speed stirring 10min of high-shearing dispersion emulsifying machine, disperse 20min then, again with the speed stirring 10min of high-shearing dispersion emulsifying machine with 10000r/min with ultrasonic cleaner supersonic oscillations under the condition of frequency 40KHz with 10000r/min; Sieve with 120 eye mesh screens at last.
5, the preparation method of a kind of foam aluminum alloy base wave-absorbing material of narrating according to claim 1, it is characterized in that the preparation of composite wave-absorbing agent coating: a kind of wave absorbing agent filler that mass percent composition in two kinds of wave absorbing agent fillers is high carries out coupling processing with coupling agent, 3% of coupling agent consumption wave absorbing agent filler, with absolute ethyl alcohol is medium, in ball mill with the speed ball milling wet mixing 30min of 120r/min, then the wave absorbing agent filler that the mass percent composition is low in two kinds of wave absorbing agent fillers is joined in the ball mill, speed ball milling wet mixing 5h with 120r/min, again the drying materials after the wet mixing is removed ethanol, put into ball mill and do mixed 5h with the speed ball milling of 120r/min; Material after do mixing is as composite wave-absorbing agent filler, prepares composite wave-absorbing agent coating by the method for claim 4.
6, the preparation method of the wave absorbing agent coating of narrating according to claim 4, it is characterized in that described dispersant: dispersant is dispersant B 401, B402, CH-10S, CH-13F, CH-13, T70 or 963.
7, the preparation method of the wave absorbing agent coating of narrating according to claim 4, it is characterized in that described coupling agent: coupling agent is silane coupler or titanate coupling agent.
8, the preparation method of the wave absorbing agent coating of narrating according to claim 4, it is characterized in that described film forming matter: film forming matter is that epoxy resin of binder mixes by mass ratio with the curing agent polyamide at 2: 1.
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