CN110117457A - A kind of high temperature resistant anti-infrared attenuation energy-saving coatings - Google Patents
A kind of high temperature resistant anti-infrared attenuation energy-saving coatings Download PDFInfo
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- CN110117457A CN110117457A CN201910449465.8A CN201910449465A CN110117457A CN 110117457 A CN110117457 A CN 110117457A CN 201910449465 A CN201910449465 A CN 201910449465A CN 110117457 A CN110117457 A CN 110117457A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- C09D7/40—Additives
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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Abstract
The invention discloses a kind of high temperature resistant anti-infrared attenuation energy-saving coatings, are grouped as by the group of following parts by weight: the chromium ion-doped LaAlO of calcium310-20 parts of spherical powder, 10-20 parts of metal oxide infra-red radiation micro mist, titanium carbide -5-10 parts of cordierite infra-red radiation micro mist, 15-25 parts of filler, 0.1-0.2 parts of retarding agent, 30-50 parts of adhesive, 10-20 parts of solvent, 0.15-0.25 parts of dispersing agent, 0.15-0.35 parts of coupling agent and 0.05-0.15 parts of defoaming agent.The invention also discloses preparation methods, comprising the following steps: Step 1: ingredient；Step 2: high-temperature process；Step 3: high shear dispersion；Step 4: coating preparation.Energy-saving coatings full-wave band infrared radiation rate provided by the invention can effectively prevent infra-red radiation to decay between 0.94 ~ 0.98, be used for a long time without cracking, decortication phenomenon, thermal shock resistance is high.
Description
Technical field
The present invention relates to technical field of coatings, and in particular to a kind of high temperature resistant anti-infrared attenuation energy-saving coatings.
Background technique
Infrared radiation coating is applied to various industrial furnaces and civil boiler heat absorbent surface, using coating to the height of heat radiation
The absorption of stove liner body or boiler tube wall to furnace flame heat can be improved in absorptivity and high emissivity principle, improves burner hearth heat
Give-and-take conditions increase the thermal efficiency, while having the protective effect of good resistance to high temperature oxidation to burner hearth lining body material, extend stove
Service life, reduction maintenance workload with boiler.In addition, improving the temperature of thermal field in furnace by strengthening Radiative heat transfer in furnace
The heating quality of uniformity and heated body, thus by the concern of people.
Currently, it is raw material that micro-nano powder is selected in the preparation of energy-saving coatings product mostly, because of its smaller ratio of diameter of particle
Surface more large radiation rate is higher；Or selecting multi-element doping system substance is raw material, improve the complication of internal crystal structure into
And improve the infrared emittance of material；But most radiation material micro-nano rice raw material and diversification doping system raw material still have
The problem of not high, wave band is unevenly distributed is radiated, so that its Applicable temperature narrow range, energy-saving effect be not high.Existing infra-red radiation section
Energy coating is since usually using adhesives such as waterglass, silica solution, so that coating is lower using temperature, bond strength is poor, high
In warm environment, coat inside is easy to produce thermal stress, and bond strength is made further to be lower, and causes disbonding.In addition, existing for a long time
Can all there are problems that crystal is grown up sintering shrinkage when using under high temperature, the activity of crystal is thus caused to reduce to make coating
Infrared emittance is gradually decayed, and when coating high-temperature shrinkage to a certain extent when will appear cracking, decortication phenomenon so that influence
The using effect of coating.If not only can guarantee coating have high radiance, but also can long-time applied at elevated temperature crystal do not grow up or
It only slightly grows up, coating does not shrink or shrink smaller, will effectively prevent the decaying of the infrared emittance of coating, avoids long-term
There is cracking, peels off in high temperature coating, and greatly improves the service life of coating, improves the energy-saving efficiency of stove and extends maintenance week
Phase.
Summary of the invention
In view of the deficienciess of the prior art, the present invention provides, crystal activity under a kind of high temperature is high, bond strength is high, coating
The small high temperature resistant anti-infrared attenuation energy-saving coatings of shrinking percentage.
The purpose of the present invention is achieved through the following technical solutions:
A kind of high temperature resistant anti-infrared attenuation energy-saving coatings, be grouped as by the group of following parts by weight: calcium is chromium ion-doped
LaAlO310-20 parts of spherical powder, 10-20 parts of metal oxide infra-red radiation micro mist, titanium carbide-cordierite infra-red radiation micro mist
5-10 parts, 15-25 parts of filler, 0.1-0.2 parts of retarding agent, 30-50 parts of adhesive, 10-20 parts of solvent, dispersing agent 0.15-0.25
Part, 0.15-0.35 parts of coupling agent and 0.05-0.15 parts of defoaming agent.
Further, the chromium ion-doped LaAlO of the calcium3Spherical powder the preparation method comprises the following steps: by sub-micron raw material La2O3、
CaO、Cr2O3、AlO3According to La1-xCaxCryAl1-yO3(x=0.1,0.2；Y=0.15,0.3,0.5) stoichiometric carries out
Polyvinyl alcohol is added in mixing, and PAA-NH4, n-butanol add suitable water, with raw material: water=1:1 ratio ball milling 2h, uses
Spherical powder is prepared in sponging granulator, and flame sprayer is sent into after 80 DEG C of oven dryings, is directly sprayed after powder melted by heating
It is mapped to rapid cooling in water, the spherical powder for being deposited to bottom sieving is washed and dried to get Ca2+、Cr3+Adulterate LaAlO3Ball
Shape powder.
Further, the metal oxide infra-red radiation micro mist the preparation method comprises the following steps:
1) according to Cr2O3:TiO2:AlO3:ZrO2: SiC quality proportioning is that 0.8:2.4:4.8:1:1 carries out ingredient；
2) it is put into ball grinder after mixing, is that suitable ballstone and water is added in 1:1.5:1.2 according to the ratio between pellet water,
Ball milling 4h crosses 250 meshes, dry under the conditions of 110 DEG C after the completion；
3) blocky powder is pulverized.
Further, the titanium carbide-cordierite radiation micro mist is mixed by the titanium carbide and cordierite that weight fraction ratio is 1:2
Grinding obtains after high temperature sintering after conjunction.
Further, the filler is silica flour, magnesia, boron oxide, kaolin, bentonite, one in refractory clay
Kind or the two or more mixtures for mixing composition in any proportion.
Further, the mixture that the retarding agent is ferrocene, titanium boride mass ratio is 1:2 composition.
Further, the binder is electric-melting zirconia micro mist 10~60%, aluminium dihydrogen phosphate by mass fraction proportion
10~60%, aqueous polyurethane 20~70% is prepared.
A kind of preparation method of high temperature resistant anti-infrared attenuation energy-saving coatings, comprising the following steps:
Step 1: ingredient: each raw material is taken in parts by weight, by the chromium ion-doped LaAlO of calcium3Spherical powder, metal oxidation
Object infra-red radiation micro mist grinds to obtain mixed powder with airflow milling after mixing；
Step 2: high-temperature process: the mixed powder after grinding is put into high temperature furnace, with 6 DEG C/min from room temperature to
400 DEG C, it is then warming up to 740 DEG C from 400 DEG C with 3 DEG C/min, is warming up to 1300 DEG C again after keeping the temperature 30min with 3 DEG C/min, heat preservation
30min finally cools to room temperature with the furnace, is uniformly mixed with titanium carbide-cordierite infra-red radiation micro mist, regrinds to obtain infrared spoke
Penetrate powder；
Step 3: high shear dispersion: adhesive progress height being added after infra-red radiation powder, filler, retarding agent are mixed and cuts
Cutting dissipates 30~60min；
Step 4: coating preparation: solvent, dispersing agent, coupling agent and defoaming agent, system being added in the material after high shear dispersion
At the thick suspension with mobility, after grinder grinding with 200 mesh net filtrations to get.
In the chromium ion-doped LaAlO of calcium3It is found in the research process of spherical powder, it is only necessary to which a small amount of Ca-Cr is co-doped with
Obtain excellent infrared radiant material.The introducing of Cr element reduces the forbidden bandwidth (3.35eV → 0.11eV) of specimen material,
It increases from free carrier concentration, improves free-carrier Absorption, to improve the infrared radiation property of specimen material.
Ca2+、Cr3+Adulterate LaAlO3Microballoon good sphericity, due to Ca2+And Cr3+Enter LaAlO simultaneously3In lattice structure, so that microballoon
Rough surface, surface are made of small grains.
Metal oxide infra-red radiation powder due to chromium oxide addition and green is presented, the present invention is chromium ion-doped by calcium
LaAlO3Spherical powder and metal oxide infra-red radiation powder carry out high-temperature process simultaneously after mixing, due to using program
Heating, can guarantee that solid phase reaction sufficiently carries out, most afterwards through 1300 DEG C of high temperature sinterings, in addition LaAlO3Spherical powder is to spinelle
Structure crystal plays peptizaiton, and obtained powder composition particle is smaller, and uniform particle sizes illustrate crystal nucleation and growth process, hair
Rate test result is penetrated 0.88 or more, and its infra-red radiation emissivity also increases as the temperature rises.At high warm
Reason is also advantageous for doping LaAlO3Spherical powder infrared radiation property further increases, this may be since high-temperature process will be residual
Remaining amorphous phase complete crystallization improves doping LaAlO3Content, while but also doped metal ion is distributed in powder
It is more uniform, enhance its infrared radiation property.
Titanium carbide-cordierite ceramic micro mist is polycrystalline multiphase system, three-phase coexistence, and a kind of hexagonal crystal corresponds to cordierite
Phase, a kind of smooth spheric granules, corresponding titanium carbide phase, a kind of crystal boundary transition region correspond to glass phase, during sintering
Ti is divided to be fused to cordierite phase admittedly and entered in glass phase network.Pure titanium carbide had higher emissivity before 2 μm, at 3 μm
Left and right decline rapidly；And pure cordierite has very high emissivity after 5 μm, nearby has minimum emissivity at 3 μm.The two is high
The titanium carbide obtained under warm reducing condition-cordierite ceramic micro mist is polycrystalline multiphase ceramic composite, more single-phase in radiation characteristic
There is very big improvement, there is higher emissivity in 2~5 μ ms.The improvement of this radiance is mainly due to titanium
Ion fuses into cordierite structure caused admittedly.In addition, the multiphase ceramic system be greater than 5 μm of later wave bands still have it is higher
Emissivity, this is because the combination of mainly two phonons absorbs, by the lattice in cordierite structure being greater than 5~6 μm of wavelength
Vibration is determined, insensitive to free carrier and impurity concentration.And the radiation characteristic in 2 μm of shortwave directions below is by titanium carbide
Electron transition inside phase causes, in this way, free carrier, IMPURITY RADIATION band connects together with two phonon combination radiation bands, can
It is formed from several μm to 25 μm of zero point or so very wide severe radiation belts.
In coating of the present invention the addition of ferrocene enable to coating to form fine and close structure there are uniform nanometers simultaneously
Duct is conducive to relief of thermal stress, and titanium boride is able to suppress growing up for abnormal grain, reduces defect, improves the mechanical property of coating
Can, the two collaboration solves high temperature infrared radiation coating of the present invention since the contraction of growing up of thermal stress and crystal causes coating to open
The problem split, to fall off can effectively prevent infra-red radiation to decay under the premise of guaranteeing high infrared radiance, reach good
Energy-saving effect extends the service life of stove and boiler, reduces maintenance workload.
Polyurethane contains ammonia ester bond, ester bond, ehter bond, urea bond, allophanic acid ester bond or unsaturated double-bond of grease etc., to base
Layer has excellent adhesive force, and it has preferable elasticity, can eliminate base material and be affected by temperature generated swelling state,
Enable to coating when coating to be firmly combined with substrate, in high-temperature oxygen environment can complete burn off, do not influence the property of coating
Can, but have the shortcomings that shrinking percentage is high.Inorganic binder aluminium dihydrogen phosphate has high temperature resistant, antidetonation, anti-strip, high temperature resistant gas
The advantages of stream washes away, but due to haveing the shortcomings that solidification temperature is high, brittleness is big, the present invention gathers the organic precursor that elasticity is good
Urethane and aluminium dihydrogen phosphate are mixed in mass fraction ratio, so that the spy that adhesive has adhesive force height, high temperature resistant, shock resistance good
Point, the shrinking percentage of coating can be improved by adding electric-melting zirconia micro mist, avoid because shrink it is excessive caused by coating cracking, fall off
Problem can assist simultaneously because electric-melting zirconia micro mist also has very high infrared radiation property with other infrared radiant materials
With the radiance of enhancing coating, electric-melting zirconia micro mist also can be reduced high temperature air holes and crackle as refractory ceramics constituent element
Quantity improves the compactness of bond strength and coating.
Compared with the prior art, the invention has the following beneficial effects:
(1) high temperature resistant anti-infrared attenuation energy-saving coatings provided by the invention by the radiative material of three kinds of systems in proportion
Proportion obtains infra-red radiation powder, not only can guarantee that coating all has very high infrared emittance in infrared full-wave segment limit, but also
It is avoided that under single doping system radiative material high temperature that crystal grows up and causes active reduction, energy-saving coatings provided by the invention exist
Between 0.94~0.98 radiance is used for a long time without being decreased obviously, it is only necessary to spray in infrared emittance under 800~1600 DEG C of high temperature
Significant energy-saving effect can be generated by applying 0.2~0.5mm thickness；
(2) on the one hand high temperature resistant anti-infrared attenuation energy-saving coatings provided by the invention are added titanium boride, are able to suppress
Crystal is grown up under hot environment, and the activity of crystal is avoided to reduce to make the infrared emittance of coating gradually decay and because of crystalline substance
Coating sintering shrinkage caused by body is grown up；On the other hand ferrocene is added to form equally distributed nano pore in coating,
Using the compound adhesive after optimization, the thermal stress between coating and substrate is effectively relieved, guarantee under hot environment coating have compared with
Small shrinking percentage avoids the occurrence of cracking, decortication phenomenon and then the using effect for influencing coating；
(3) high temperature resistant anti-infrared attenuation energy-saving coatings refractoriness provided by the invention is up to 1850 DEG C, and and liner body
It is firmly combined, long service life, recycles thermal shock through 1000 DEG C to room temperature 25 times or more, coating surface is without dusting, bubbling, crackle
Occur with peeling phenomenon, there is good thermal shock resistance.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, carried out below in conjunction with specific embodiment detailed
Thin description.
Embodiment 1
A kind of high temperature resistant anti-infrared attenuation energy-saving coatings, be grouped as by the group of following parts by weight: calcium is chromium ion-doped
LaAlO310 parts of spherical powder, 10 parts of metal oxide infra-red radiation micro mist, titanium carbide -5 parts of cordierite infra-red radiation micro mist are filled out
15 parts of material, 0.1 part of retarding agent, 30 parts of adhesive, 10 parts of solvent, 0.15 part of dispersing agent, 0.15 part of coupling agent and defoaming agent 0.05
Part.
Further, the chromium ion-doped LaAlO of the calcium3Spherical powder the preparation method comprises the following steps: by sub-micron raw material La2O3、
CaO、Cr2O3、AlO3According to La1-xCaxCryAl1-yO3(x=0.1；Y=0.15) stoichiometric is mixed, and poly- second is added
Enol, PAA-NH4, n-butanol add suitable water, with raw material: water=1:1 ratio ball milling 2h, using mist projection granulating mechanism
It is standby to obtain spherical powder, it is sent into flame sprayer after 80 DEG C of oven dryings, is directly injected to after powder melted by heating in water rapidly
It is cooling, the spherical powder for being deposited to bottom sieving is washed and dried to get Ca2+、Cr3+Adulterate LaAlO3Spherical powder.
Further, the metal oxide infra-red radiation micro mist the preparation method comprises the following steps:
1) according to Cr2O3:TiO2:AlO3:ZrO2: SiC quality proportioning is that 0.8:2.4:4.8:1:1 carries out ingredient；
2) it is put into ball grinder after mixing, is that suitable ballstone and water is added in 1:1.5:1.2 according to the ratio between pellet water,
Ball milling 4h crosses 250 meshes, dry under the conditions of 110 DEG C after the completion；
3) blocky powder is pulverized.
Further, the titanium carbide-cordierite radiation micro mist is mixed by the titanium carbide and cordierite that weight fraction ratio is 1:2
Grinding obtains after high temperature sintering after conjunction.
Further, the filler is silica flour, magnesia, boron oxide, kaolin, bentonite, one in refractory clay
Kind or the two or more mixtures for mixing composition in any proportion.
Further, the mixture that the retarding agent is ferrocene, titanium boride mass ratio is 1:2 composition.
Further, the adhesive by mass fraction proportion be electric-melting zirconia micro mist 10%, aluminium dihydrogen phosphate 60%,
Aqueous polyurethane 30% is prepared.
Further, the solvent is water.
Further, the dispersing agent is sodium tripolyphosphate, calgon or polyethylene glycol type water-reducing agent FS10.
Further, the coupling agent is trimethoxysilane coupling agent.
Further, the defoaming agent is the G60 defoaming agent of Sima Chemical Manufacture.
A kind of preparation method of high temperature resistant anti-infrared attenuation energy-saving coatings, comprising the following steps:
Step 1: ingredient: each raw material is taken in parts by weight, by the chromium ion-doped LaAlO of calcium3Spherical powder, metal oxidation
Object infra-red radiation micro mist grinds to obtain mixed powder with airflow milling after mixing；
Step 2: high-temperature process: the mixed powder after grinding is put into high temperature furnace, with 6 DEG C/min from room temperature to
400 DEG C, it is then warming up to 740 DEG C from 400 DEG C with 3 DEG C/min, is warming up to 1300 DEG C again after keeping the temperature 30min with 3 DEG C/min, heat preservation
30min finally cools to room temperature with the furnace, is uniformly mixed with titanium carbide-cordierite infra-red radiation micro mist, regrinds to obtain infrared spoke
Penetrate powder；
Step 3: high shear dispersion: adhesive progress height being added after infra-red radiation powder, filler, retarding agent are mixed and cuts
Cutting dissipates 30~60min；
Step 4: coating preparation: solvent, dispersing agent, coupling agent and defoaming agent, system being added in the material after high shear dispersion
At the thick suspension with mobility, after grinder grinding with 200 mesh net filtrations to get.
Embodiment 2
A kind of high temperature resistant anti-infrared attenuation energy-saving coatings, be grouped as by the group of following parts by weight: calcium is chromium ion-doped
LaAlO312 parts of spherical powder, 18 parts of metal oxide infra-red radiation micro mist, titanium carbide -7 parts of cordierite infra-red radiation micro mist are filled out
20 parts of material, 0.15 part of retarding agent, 40 parts of adhesive, 15 parts of solvent, 0.20 part of dispersing agent, 0.25 part of coupling agent and defoaming agent 0.1
Part.
Further, the chromium ion-doped LaAlO of the calcium3Spherical powder the preparation method comprises the following steps: by sub-micron raw material La2O3、
CaO、Cr2O3、AlO3According to La1-xCaxCryAl1-yO3(x=0.1；Y=0.3) stoichiometric is mixed, and poly- second is added
Enol, PAA-NH4, n-butanol add suitable water, with raw material: water=1:1 ratio ball milling 2h, using mist projection granulating mechanism
It is standby to obtain spherical powder, it is sent into flame sprayer after 80 DEG C of oven dryings, is directly injected to after powder melted by heating in water rapidly
It is cooling, the spherical powder for being deposited to bottom sieving is washed and dried to get Ca2+、Cr3+Adulterate LaAlO3Spherical powder.
Further, the metal oxide infra-red radiation micro mist the preparation method comprises the following steps:
1) according to Cr2O3:TiO2:AlO3:ZrO2: SiC quality proportioning is that 0.8:2.4:4.8:1:1 carries out ingredient；
2) it is put into ball grinder after mixing, is that suitable ballstone and water is added in 1:1.5:1.2 according to the ratio between pellet water,
Ball milling 4h crosses 250 meshes, dry under the conditions of 110 DEG C after the completion；
3) blocky powder is pulverized.
Further, the titanium carbide-cordierite radiation micro mist is mixed by the titanium carbide and cordierite that weight fraction ratio is 1:2
Grinding obtains after high temperature sintering after conjunction.
Further, the filler is silica flour, magnesia, boron oxide, kaolin, bentonite, one in refractory clay
Kind or the two or more mixtures for mixing composition in any proportion.
Further, the mixture that the retarding agent is ferrocene, titanium boride mass ratio is 1:2 composition.
Further, the adhesive by mass fraction proportion be electric-melting zirconia micro mist 40%, aluminium dihydrogen phosphate 25%,
Aqueous polyurethane 35% is prepared.
Further, the solvent is water.
Further, the dispersing agent is sodium tripolyphosphate, calgon or polyethylene glycol type water-reducing agent FS10.
Further, the coupling agent is trimethoxysilane coupling agent.
Further, the defoaming agent is the G60 defoaming agent of Sima Chemical Manufacture.
A kind of preparation method of high temperature resistant anti-infrared attenuation energy-saving coatings, comprising the following steps:
Step 1: ingredient: each raw material is taken in parts by weight, by the chromium ion-doped LaAlO of calcium3Spherical powder, metal oxidation
Object infra-red radiation micro mist grinds to obtain mixed powder with airflow milling after mixing；
Step 2: high-temperature process: the mixed powder after grinding is put into high temperature furnace, with 6 DEG C/min from room temperature to
400 DEG C, it is then warming up to 740 DEG C from 400 DEG C with 3 DEG C/min, is warming up to 1300 DEG C again after keeping the temperature 30min with 3 DEG C/min, heat preservation
30min finally cools to room temperature with the furnace, is uniformly mixed with titanium carbide-cordierite infra-red radiation micro mist, regrinds to obtain infrared spoke
Penetrate powder；
Step 3: high shear dispersion: adhesive progress height being added after infra-red radiation powder, filler, retarding agent are mixed and cuts
Cutting dissipates 30~60min；
Step 4: coating preparation: solvent, dispersing agent, coupling agent and defoaming agent, system being added in the material after high shear dispersion
At the thick suspension with mobility, with 200 mesh net filtrations to get.
Embodiment 3
A kind of high temperature resistant anti-infrared attenuation energy-saving coatings, be grouped as by the group of following parts by weight: calcium is chromium ion-doped
LaAlO317 parts of spherical powder, 13 parts of metal oxide infra-red radiation micro mist, titanium carbide -10 parts of cordierite infra-red radiation micro mist,
25 parts of filler, 0.2 part of retarding agent, 50 parts of adhesive, 20 parts of solvent, 0.25 part of dispersing agent, 0.35 part of coupling agent and defoaming agent
0.15 part.
Further, the chromium ion-doped LaAlO of the calcium3Spherical powder the preparation method comprises the following steps: by sub-micron raw material La2O3、
CaO、Cr2O3、AlO3According to La1-xCaxCryAl1-yO3(x=0.2；Y=0.5) stoichiometric is mixed, and poly- second is added
Enol, PAA-NH4, n-butanol add suitable water, with raw material: water=1:1 ratio ball milling 2h, using mist projection granulating mechanism
It is standby to obtain spherical powder, it is sent into flame sprayer after 80 DEG C of oven dryings, is directly injected to after powder melted by heating in water rapidly
It is cooling, the spherical powder for being deposited to bottom sieving is washed and dried to get Ca2+、Cr3+Adulterate LaAlO3Spherical powder.
Further, the metal oxide infra-red radiation micro mist the preparation method comprises the following steps:
1) according to Cr2O3:TiO2:AlO3:ZrO2: SiC quality proportioning is that 0.8:2.4:4.8:1:1 carries out ingredient；
2) it is put into ball grinder after mixing, is that suitable ballstone and water is added in 1:1.5:1.2 according to the ratio between pellet water,
Ball milling 4h crosses 250 meshes, dry under the conditions of 110 DEG C after the completion；
3) blocky powder is pulverized.
Further, the titanium carbide-cordierite radiation micro mist is mixed by the titanium carbide and cordierite that weight fraction ratio is 1:2
Grinding obtains after high temperature sintering after conjunction.
Further, the filler is silica flour, magnesia, boron oxide, kaolin, bentonite, one in refractory clay
Kind or the two or more mixtures for mixing composition in any proportion.
Further, the mixture that the retarding agent is ferrocene, titanium boride mass ratio is 1:2 composition.
Further, the adhesive by mass fraction proportion be electric-melting zirconia micro mist 20%, aluminium dihydrogen phosphate 50%,
Aqueous polyurethane 30% is prepared.
Further, the solvent is water.
Further, the dispersing agent is sodium tripolyphosphate, calgon or polyethylene glycol type water-reducing agent FS10.
Further, the coupling agent is trimethoxysilane coupling agent.
Further, the defoaming agent is the G60 defoaming agent of Sima Chemical Manufacture.
A kind of preparation method of high temperature resistant anti-infrared attenuation energy-saving coatings, comprising the following steps:
Step 1: ingredient: each raw material is taken in parts by weight, by the chromium ion-doped LaAlO of calcium3Spherical powder, metal oxidation
Object infra-red radiation micro mist grinds to obtain mixed powder with airflow milling after mixing；
Step 2: high-temperature process: the mixed powder after grinding is put into high temperature furnace, with 6 DEG C/min from room temperature to
400 DEG C, it is then warming up to 740 DEG C from 400 DEG C with 3 DEG C/min, is warming up to 1300 DEG C again after keeping the temperature 30min with 3 DEG C/min, heat preservation
30min finally cools to room temperature with the furnace, is uniformly mixed with titanium carbide-cordierite infra-red radiation micro mist, regrinds to obtain infrared spoke
Penetrate powder；
Step 3: high shear dispersion: adhesive progress height being added after infra-red radiation powder, filler, retarding agent are mixed and cuts
Cutting dissipates 30~60min；
Step 4: coating preparation: solvent, dispersing agent, coupling agent and defoaming agent, system being added in the material after high shear dispersion
At the thick suspension with mobility, after grinder grinding with 200 mesh net filtrations to get.
Comparative example 1
Except with the chromium ion-doped LaAlO of identical weight number calcium3Spherical powder replaces metal oxide infra-red radiation micro mist
Outside titanium carbide-cordierite infra-red radiation micro mist, remaining is the same as embodiment 2.
Comparative example 2
Except replacing the chromium ion-doped LaAlO of calcium with identical weight number metal oxide infra-red radiation micro mist3Spherical powder
Outside titanium carbide-cordierite infra-red radiation micro mist, remaining is the same as embodiment 2.
Comparative example 3
Except replacing the chromium ion-doped LaAlO of calcium with identical weight number titanium carbide-cordierite infra-red radiation micro mist3Spherical powder
Outside body and metal oxide infra-red radiation micro mist, remaining is the same as embodiment 2.
With the full-wave band infrared radiation of infrared radiometer testing example 1~3 and 1~3 powder of comparative example and coating
Rate.Test result shows that all band radiance of the infra-red radiation powder of Examples 1 to 3 is 0.93~0.95, the all-wave of coating
Section radiance is 0.94~0.98, as shown in table 1 compared with 1~3 test result of comparative example.
The infra-red radiation radiance test result of 1 Examples 1 to 3 of table and comparative example 1~3
As it can be seen from table 1 the powder and coating infrared emittance of Examples 1 to 3 be obviously higher than comparative example 1~3, it can
See that the radiative material mixing of three kinds of systems can significantly improve the infrared emittance of radiation powder, the radiance of coating also significantly mentions
It is high.By the chromium ion-doped LaAlO of calcium in preparation process of the present invention3Spherical powder mixes with metal oxide infra-red radiation micro mist
It is common after even to carry out high-temperature process, it on the one hand can be improved the chromium ion-doped LaAlO of calcium3The radiance of spherical powder, it is another
The spinel structure crystal that aspect can promote metal oxide infra-red radiation micro mist to be sintered is smaller, and partial size is more evenly.
Comparative example 4
In addition to adhesive used is electric-melting zirconia micro mist, remaining is the same as embodiment 2.
Comparative example 5
In addition to adhesive used is aluminium dihydrogen phosphate, remaining is the same as embodiment 2.
Comparative example 6
In addition to adhesive used is aqueous polyurethane, remaining is the same as embodiment 2.
The performance indicator of one pack system adhesive used in compound adhesive used in the embodiment of the present invention 1~3 and comparative example 1~3
As shown in table 2.
The adhesive the performance test results of 2 Examples 1 to 3 of table and comparative example 4~6
From table 2 it can be seen that the flexural strength and shear strength of the adhesive of Examples 1 to 3 are superior to comparative example 1~3,
Adhesive after three kinds of components of aqueous polyurethane are compound under hot conditions had not only been able to satisfy the temperature requirement of High-temp. kiln, but also can guarantee
The bond strength and stability of coating have good comprehensive performance.
Comparative example 7
In addition to without retarding agent, remaining is the same as embodiment 2.
Comparative example 8
In addition to without ferrocene, remaining is the same as embodiment 2.
Comparative example 9
In addition to without titanium boride, remaining is the same as embodiment 2.
The high-temperature crucibles resistance furnace for selecting six same models, before coating detect 1093 DEG C of furnace wall radiance be 0.3~
0.5, Examples 1 to 3 and 7~9 gained coating of comparative example are tested for the property using the coating that identical coating process obtains,
It the results are shown in Table 3.
The coating performance test result of 3 Examples 1 to 3 of table and comparative example 7~9
As shown in Table 3,1093 DEG C of radiances of coating prepared by Examples 1 to 3 are after 0.94~0.97,1093 DEG C of burning 144h
Radiance is without decline, and for radiance still without being decreased obviously, other properties are superior to comparative example 7~9 after being on active service 30 days；Comparative example
7 are free of retarding agent, and spinel crystal is easy to grow up under hot conditions, and activity reduces, thus after 1093 DEG C of burning 72h radiance by original
0.88 come drops to 0.69, the nanochannel of relief of thermal stress is capable of due to that cannot be formed, thermal shock resistance can also have obviously
Decline；Comparative example 8 is free of ferrocene, can not form nanochannel in coating, thermal stress is larger under hot environment, therefore thermal shock resistance
It can reduce；Comparative example 9 is free of titanium boride, and crystal is grown up comparatively fast, and radiance and thermal shock resistance can be substantially reduced.
The coating made from the high-alumina brick surface coating embodiment of the present invention 1~3, compared with blank sample, accumulation of heat at 1200 DEG C
Amount improves 17~24%, shows that high temperature resistant anti-infrared attenuation energy-saving coatings provided by the invention have significant energy conservation effect
Fruit.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, ability
Other modifications or equivalent replacement that domain those of ordinary skill makes technical solution of the present invention, without departing from skill of the present invention
The spirit and scope of art scheme, are intended to be within the scope of the claims of the invention.
Claims (8)
1. a kind of high temperature resistant anti-infrared attenuation energy-saving coatings, which is characterized in that be grouped as by the group of following parts by weight: calcium chromium
Ion doping LaAlO310-20 parts of spherical powder, 10-20 parts of metal oxide infra-red radiation micro mist, titanium carbide-cordierite are infrared
Radiate micro mist 5-10 parts, 15-25 parts of filler, 0.1-0.2 parts of retarding agent, 30-50 parts of adhesive, 10-20 parts of solvent, dispersing agent
0.15-0.25 parts, 0.15-0.35 parts of coupling agent and 0.05-0.15 parts of defoaming agent.
2. high temperature resistant anti-infrared attenuation energy-saving coatings according to claim 1, which is characterized in that the calcium chromium ion
Adulterate LaAlO3Spherical powder the preparation method comprises the following steps: by sub-micron raw material La2O3、CaO、Cr2O3、AlO3According to La1- xCaxCryAl1-yO3(x=0.1,0.2；Y=0.15,0.3,0.5) stoichiometric is mixed, and polyvinyl alcohol is added,
PAA-NH4, n-butanol add suitable water, with raw material: water=2 h of 1:1 ratio ball milling is prepared using sponging granulator
Spherical powder is sent into flame sprayer after 80 DEG C of oven dryings, rapid cooling in water is directly injected to after powder melted by heating,
The spherical powder for being deposited to bottom sieving is washed and dried to get Ca2+、Cr3+Adulterate LaAlO3Spherical powder.
3. high temperature resistant anti-infrared attenuation energy-saving coatings according to claim 1, which is characterized in that the metal oxidation
Object infra-red radiation micro mist the preparation method comprises the following steps:
1) according to Cr2O3:TiO2:AlO3:ZrO2: SiC quality proportioning is that 0.8:2.4:4.8:1:1 carries out ingredient；
2) it is put into ball grinder after mixing, is that suitable ballstone and water, ball milling is added in 1:1.5:1.2 according to the ratio between pellet water
4 h cross 250 meshes, dry under the conditions of 110 DEG C after the completion；
3) blocky powder is pulverized.
4. high temperature resistant anti-infrared attenuation energy-saving coatings according to claim 1, which is characterized in that the titanium carbide-
Cordierite is radiated to grind after high temperature sintering after micro mist is mixed by the titanium carbide and cordierite that weight fraction ratio is 1:2 and be obtained.
5. high temperature resistant anti-infrared attenuation energy-saving coatings according to claim 1, which is characterized in that the filler is stone
One or more of Ying Fen, magnesia, boron oxide, kaolin, bentonite, refractory clay mix composition in any proportion
Mixture.
6. high temperature resistant anti-infrared attenuation energy-saving coatings according to claim 1, which is characterized in that the retarding agent is
Ferrocene, the mixture that titanium boride mass ratio is 1:2 composition.
7. high temperature resistant anti-infrared attenuation energy-saving coatings according to claim 1, which is characterized in that the adhesive by
Mass fraction proportion is electric-melting zirconia micro mist 10 ~ 60%, aluminium dihydrogen phosphate 10 ~ 60%, aqueous polyurethane 20 ~ 70% are prepared.
8. a kind of preparation method of any one according to claim 1 ~ 7 high temperature resistant anti-infrared attenuation energy-saving coatings,
It is characterized in that, comprising the following steps:
Step 1: ingredient: each raw material is taken in parts by weight, by the chromium ion-doped LaAlO of calcium3Spherical powder, metal oxide are infrared
Radiation micro mist grinds to obtain mixed powder with airflow milling after mixing；
Step 2: high-temperature process: the mixed powder after grinding being put into high temperature furnace, with 6 DEG C/min from room temperature to 400
DEG C, it is then warming up to 740 DEG C from 400 DEG C with 3 DEG C/min, is warming up to 1300 DEG C again after keeping the temperature 30 min with 3 DEG C/min,
30 min are kept the temperature, finally cool to room temperature with the furnace, is uniformly mixed, regrinds with titanium carbide-cordierite infra-red radiation micro mist
Infra-red radiation powder；
Step 3: high shear dispersion: adhesive is added after infra-red radiation powder, filler, retarding agent are mixed and carries out high shear point
Dissipate 30 ~ 60 min；
Step 4: coating preparation: solvent, dispersing agent, coupling agent and defoaming agent being added in the material after high shear dispersion, tool is made
Have the thick suspension of mobility, with 200 mesh net filtrations to get.
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| CN111943662A (en) * | 2020-08-27 | 2020-11-17 | 中国平煤神马能源化工集团有限责任公司 | Ceramic black material capable of absorbing infrared heat radiation and preparation method thereof |
| CN111964484A (en) * | 2020-08-27 | 2020-11-20 | 中国平煤神马能源化工集团有限责任公司 | Laminar flow eddy current type ascension pipe raw coke oven gas heat exchanger sprayed with ceramic black materials |
| CN112890300A (en) * | 2021-02-05 | 2021-06-04 | 东莞市中科智恒新材料有限公司 | Far infrared quartz tube applied to low-temperature non-combustible electronic cigarette atomizer and preparation method thereof |
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