CN105062160A - Anti-oxidation high-temperature infrared radiation ceramic coating and preparation method and application thereof - Google Patents
Anti-oxidation high-temperature infrared radiation ceramic coating and preparation method and application thereof Download PDFInfo
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- 230000005855 radiation Effects 0.000 title claims abstract description 24
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 230000003064 anti-oxidating effect Effects 0.000 title abstract 3
- 238000000576 coating method Methods 0.000 claims abstract description 63
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 26
- RQLWXPCFUSHLNV-UHFFFAOYSA-N [Cr].[Ca] Chemical compound [Cr].[Ca] RQLWXPCFUSHLNV-UHFFFAOYSA-N 0.000 claims abstract description 25
- -1 lanthanum aluminate Chemical class 0.000 claims abstract description 25
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 15
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 15
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 13
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 29
- 239000007921 spray Substances 0.000 claims description 25
- 238000000498 ball milling Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 229960001866 silicon dioxide Drugs 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 235000019580 granularity Nutrition 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 5
- 238000009775 high-speed stirring Methods 0.000 claims description 2
- 239000007790 solid phase Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000000295 fuel oil Substances 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 229910001430 chromium ion Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 14
- 238000005507 spraying Methods 0.000 description 10
- 206010020843 Hyperthermia Diseases 0.000 description 9
- 229910052593 corundum Inorganic materials 0.000 description 9
- 239000010431 corundum Substances 0.000 description 9
- 230000036031 hyperthermia Effects 0.000 description 9
- 238000002156 mixing Methods 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Coating By Spraying Or Casting (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an anti-oxidation high-temperature infrared radiation ceramic coating, a preparation method and application thereof, wherein the ceramic coating comprises the following components: 30-70% of calcium-chromium ion doped lanthanum aluminate, 0.5-20% of superfine silicon dioxide and/or silica sol, 0.05-5% of polyacrylic acid, 0.1-10% of polyvinyl alcohol and 20-70% of water. The ceramic coating has the characteristics of excellent oxidation resistance, high-temperature stability, high emissivity and excellent thermal shock resistance, can be sprayed in high-temperature furnaces such as electricity, gas, fuel oil, coal and the like, and can be easily constructed on various refractory material substrates. The anti-oxidation high-temperature radiation coating prepared by the invention can be firmly attached to the surface of a refractory lining after being formed into a film at high temperature, and does not fall off after long-term service.
Description
Technical field
The present invention relates to technical field of inorganic material, more specifically, relate to a kind of anti-oxidative high temp, infrared radiation stupalith and coating production thereof.
Background technology
Under the strategic requirement of National Industrial structural adjustment, improve thermal efficiency of industrial furnace, development Technolqgy for Energy Economizing is very urgent.Radiation energy-saving technology, as one of typical technology realizing furnace energy-saving, can improve the utilization efficiency of heat energy of stove to greatest extent by the radiative transfer strengthened under high temperature (>=800 DEG C) environment.Be silicon, aluminum fire resistant materials mostly at the refractory lining material of the industrial circles such as iron and steel, building materials, petrochemical industry, pottery, the generating body of heater such as process furnace, hotblast stove, pyrolyzer, electricity generation boiler used, its emittance is general lower, only reaches about 0.4-0.5.Therefore, use the coated material of high emissivity greatly will improve its radiative transfer ability, more heat energy is acted on by heated parts, reduce the waste heat that high-temperature flue gas is taken away, the consumption of coal, Sweet natural gas equal energy source can be reduced so further, and enhance productivity.
In recent years, the development and utilization of energy-conservation radiation paint obtains extensive concern both domestic and external.The Enecoat coating series that the Emisshield coating series of the Emisshield company production of the U.S., Britain HarbertBeven produce and energy-conservation king's coating series that Shandong Hui Min scientific & technical corporation produces are mainly the energy-saving coatings of main Radiant base material with non-oxide powders such as silicon carbide.Mainly high temperature oxidation, the ablation and come off in oxidizing atmosphere of the main Problems existing of these coating, has had a strong impact on the long service under the hot environment of energy-conserving product and use.And domestic CN101343427A, be the energy-saving coatings of main Radiant base material with transition metal oxide and metal oxide body disclosed in the patents such as CN101481551A and CN102219492A, due to the change of thing phase in applied at elevated temperature, result in instability and the decay of emittance, the infrared emittance of the short-wave band simultaneously corresponding to high temperature is not high yet.Therefore, researching and developing a kind of anti-oxidative high-temperature radiation material is strengthen one of infrared radiating coating energy-saving effect, the important directions that increases the service life.
Summary of the invention
First technical problem that the present invention will solve is to provide a kind of anti-oxidative high temp, infrared radiation ceramic coating, and this coating has energy-conservation, high temperature resistant and that infrared emittance is stable feature.
Second technical problem that the present invention will solve provides a kind of preparation method of anti-oxidative high temp, infrared radiation ceramic coating.
The 3rd technical problem that the present invention will solve provides a kind of using method of anti-oxidative high temp, infrared radiation ceramic coating.
For solving first technical problem, the present invention adopts following technical proposals:
A kind of anti-oxidative high temp, infrared radiation ceramic coating, it comprises: superfine silicon dioxide and/or silicon sol that calcium-chromium ion-doped lanthanum aluminate that massfraction is 30-70%, massfraction are 0.5-20%, and the polyvinyl alcohol that massfraction is the polyacrylic acid of 0.05-5%, massfraction is 0.1-10% and massfraction are the water of 20-70%.
Preferably, solid phase mass content is 30-68%.
Preferably, polyacrylic mean polymerisation degree is 2500-4500, and more preferably, mean polymerisation degree is 3000.
Preferably, the mean polymerisation degree of polyvinyl alcohol is 1000-2500, and more preferably, mean polymerisation degree is 1750.
Wherein said silicon-dioxide and silicon sol are superfine high-purity silicon dioxide or silicon sol, and it is as high-temperature agglomerant.
Described calcium-chromium ion-doped lanthanum aluminate is in particular La
1-yca
ycr
xal
1-xo
3, preferably, described calcium-chromium ion-doped lanthanum aluminate massfraction is 50%.
Preferably, described calcium-chromium ion-doped lanthanum aluminate is the powder of 325 order granularities.
For solving second technical problem, the present invention adopts following technical scheme:
A preparation method for anti-oxidative high temp, infrared radiation ceramic coating, it comprises the steps: to prepare calcium-chromium ion-doped lanthanum aluminate; Described calcium-chromium ion-doped lanthanum aluminate is mixed with the ratio of mass volume ratio 1:2-5 with raw spirit, star-like ball milling 2-6 hour; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; Be the described Radiant base material of 30-70% by massfraction, massfraction be the silicon-dioxide of 0.5-20% and/or silicon sol, the equal homogeneity process of water that polyvinyl alcohol that polyacrylic acid that massfraction is 0.05-5%, massfraction are 0.1-10% and massfraction are 20-68%.
Prepare calcium-chromium ion-doped lanthanum aluminate to carry out according to the disclosed method of patent (application number is 201510119885.1).Particularly, commercially available analytical pure level lanthanum trioxide, aluminum oxide, calcium oxide, chromic oxide are carried out ball milling mixing according to molar ratio 8:9:4:1, dries, briquetting, then calcining synthesis under 1600 DEG C of high temperature.
Wherein said silicon-dioxide and silicon sol are superfine high-purity silicon dioxide or silicon sol, and it is as high-temperature agglomerant.
Described polyacrylic acid is the dispersion agent of slurry; Described polyvinyl alcohol is the binding agent of slurry.
The described mode homogenizing process is one or more in star-like ball milling, vibration ball milling, high-speed stirring, and the treatment time is 1-5 hour.
For solving the 3rd technical problem, the present invention adopts following technical scheme:
A using method for anti-oxidative high temp, infrared radiation ceramic coating, it comprises: the anti-oxidative high-temperature coatings of preparation is sent into spray gun, substrate is carried out even application and dries; Calcining, namely obtains coating.
Preferably, the material of described substrate is corundum.
Preferably, the distance of spraying is 10-40cm, and the air pressure of spraying is 0.3-0.4MPa, and spray time is 1-10 second.
Preferably, at room temperature dry in air.
Preferably, described calcining temperature is calcine in the high temperature sintering furnace of 1500-1700 DEG C, and calcination time is 1-5 hour.
Preferably, coat-thickness is 50-500 μm.
Spraying coating process uses high atomization coating varnish spray gun, and preferably, paint gun shaped number is F-75 or W77
Beneficial effect of the present invention is as follows:
Calcium in anti-oxidative high temperature radiating coating material of the present invention-chromium ion-doped aluminate lanthanum powder material adopts simple solid phase synthesis process to be prepared (as number of patent application: CN2015101198851), and other materials used are commercially available technical grade product.This ceramic coating has anti-oxidative excellence, high-temperature stable, emittance are high, and the feature of good in thermal shock, can be sprayed in the High-temp. kilns such as electricity, combustion gas, fuel oil, coal, and construct all easily on various refractory substrate.Anti-oxidant hyperthermia radiation coating prepared by the present invention is after high temperature film forming, and can be attached to refractorily lined surface securely, long service does not come off.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 illustrates in embodiment 1 photo prepared in corundum substrate before and after infrared radiating coating.
Fig. 2 illustrates the material phase analysis collection of illustrative plates of anti-oxidative hyperthermia radiation coating prepared in embodiment 1.
Embodiment
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive, should not limit the scope of the invention with this below.
Embodiment 1.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 2000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; By the superfine nano silicon-dioxide of the described Radiant base material of 1kg, 150g, 15g mean polymerisation degree be 3000 polyacrylic acid, 50g mean polymerisation degree be the polyvinyl alcohol of 1750 and the water mix and blend of 1.66kg, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is F-75 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 5 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 1 hour for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.
Adopt the coating prepared by spectrophotometer test to be 0.91 in the emittance of 0.76-2.5 mu m waveband, adopting normal direction total reflection emittance tester to measure coating is 0.95 in the emittance that the emittance of 3-5 mu m waveband is 0.86,8-14 mu m waveband.
Embodiment 2.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 5000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; Be the polyacrylic acid of 3000 by the superfine nano silicon-dioxide of the described Radiant base material of 1kg, 50g, the mean polymerisation degree of 15g, the mean polymerisation degree of 50g is the polyvinyl alcohol of 1750 and the water mix and blend of 1.0kg, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is F-75 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 5 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 1 hour for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.
Adopt the coating prepared by spectrophotometer test to be 0.93 in the emittance of 0.76-2.5 mu m waveband, adopting normal direction total reflection emittance tester to measure coating is 0.93 in the emittance that the emittance of 3-5 mu m waveband is 0.87,8-14 mu m waveband.
Embodiment 3.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 3000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; By the silicon sol of the described Radiant base material of 1kg, 300g, 15g mean polymerisation degree be 4500 polyacrylic acid, 50g mean polymerisation degree be the polyvinyl alcohol of 1000 and the water mix and blend of 560g, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is W77 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 5 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 1 hour for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.
Adopt the coating prepared by spectrophotometer test to be 0.87 in the emittance of 0.76-2.5 mu m waveband, adopting normal direction total reflection emittance tester to measure coating is 0.93 in the emittance that the emittance of 3-5 mu m waveband is 0.81,8-14 mu m waveband.
Embodiment 4.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 2000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; By the superfine nano silicon-dioxide of the described Radiant base material of 0.9kg, 15g, the mean polymerisation degree of 1.5g be 2500 polyacrylic acid, 3g mean polymerisation degree be the polyvinyl alcohol of 2500 and the water mix and blend of 2011.5g, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is F-75 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 5 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 5 hours for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.
Adopt the coating prepared by spectrophotometer test to be 0.91 in the emittance of 0.76-2.5 mu m waveband, adopting normal direction total reflection emittance tester to measure coating is 0.94 in the emittance that the emittance of 3-5 mu m waveband is 0.89,8-14 mu m waveband.
Embodiment 5.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 2.1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 5000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; Be the polyacrylic acid of 3000 by the superfine nano silicon-dioxide of the described Radiant base material of 2.1kg, 15g, 150g mean polymerisation degree, the mean polymerisation degree of 135g is the polyvinyl alcohol of 1750 and the water mix and blend of 0.6kg, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is F-75 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 5 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 1 hour for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.
Embodiment 6.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 2000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; Be the polyacrylic acid of 3500 by the silicon sol of the described Radiant base material of 1kg, 600g, the mean polymerisation degree of 150g, the mean polymerisation degree of 300g is the polyvinyl alcohol of 1500 and the water mix and blend of 0.95kg, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is F-75 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 5 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 3 hours for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.
Embodiment 7.
1) coating is prepared
Calcium-chromium ion-doped lanthanum aluminate is prepared according to the method for patent (CN2015101198851); 1kg calcium-chromium ion-doped lanthanum aluminate is mixed with 5000ml raw spirit, star-like ball milling 2 hours; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; Be the polyacrylic acid of 3000 by the superfine nano silicon-dioxide of the described Radiant base material of 1kg, 50g, the mean polymerisation degree of 15g, the mean polymerisation degree of 50g is the polyvinyl alcohol of 1750 and the water mix and blend of 1.0kg, put into star-like ball mill high-speed mixing 2 hours.Make anti-oxidative high-temperature coatings.
2) coating uses
It is F-75 spray gun that anti-oxidative high-temperature coatings is sent into model, and under the condition of 0.4MPa pressure, spray distance is 20cm, and spray time is 10 seconds, dries 24 hours after having sprayed.Corundum substrate after spraying is put into high temperature sintering furnace calcine, calcine 1 hour for 1500 DEG C, after taking out cooling, anti-oxidative hyperthermia radiation coating can be obtained.Coat-thickness is 380 μm.
Obviously; the above embodiment of the present invention is only for example of the present invention is clearly described; and be not the restriction to embodiments of the present invention; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all embodiments, every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (10)
1. an anti-oxidative high temp, infrared radiation ceramic coating, it is characterized in that comprising: superfine silicon dioxide and/or silicon sol that calcium-chromium ion-doped lanthanum aluminate that massfraction is 30-70%, massfraction are 0.5-20%, the polyvinyl alcohol that massfraction is the polyacrylic acid of 0.05-5%, massfraction is 0.1-10% and massfraction are the water of 20-70%.
2. ceramic coating according to claim 1, is characterized in that, the solid phase mass content of described ceramic coating is 30-68%.
3. ceramic coating according to claim 1, is characterized in that, polyacrylic mean polymerisation degree is 2500-4500.
4. ceramic coating according to claim 1, is characterized in that, polyacrylic mean polymerisation degree is 3000.
5. ceramic coating according to claim 1, is characterized in that, the mean polymerisation degree of polyvinyl alcohol is 1000-2500kDa, and more preferably, mean polymerisation degree is 1750kDa.
6. ceramic coating according to claim 1, is characterized in that, described silicon-dioxide and silicon sol are superfine high-purity silicon dioxide or silicon sol.
7. as the preparation method of the ceramic coating of claim 1-5, its feature in, comprise the steps:
Prepare calcium-chromium ion-doped lanthanum aluminate; Described calcium-chromium ion-doped lanthanum aluminate is mixed with the ratio of mass volume ratio 1:2-5 with raw spirit, star-like ball milling 2-6 hour; Ball milling post-drying, obtains the Radiant base material of 325 order granularities; Be the described Radiant base material of 30-70% by massfraction, massfraction be the silicon-dioxide of 0.5-20% and/or silicon sol, the equal homogeneity process of water that polyvinyl alcohol that polyacrylic acid that massfraction is 0.05-5%, massfraction are 0.1-10% and massfraction are 20-68%.
8. preparation method according to claim 7, is characterized in that: described in homogenize the mode of process be star-like ball milling, vibration ball milling, in high-speed stirring one or more, preferably, the treatment time is 1-5 hour.
9. as the using method of the ceramic coating of claim 1-5, its feature in, by preparation anti-oxidative high-temperature coatings send into spray gun, even application is carried out in substrate, dries; Calcining, namely obtains coating.
10. using method according to claim 9, is characterized in that, described coat-thickness is 50-500 μm.
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| CN201510531440.4A CN105062160B (en) | 2015-08-26 | 2015-08-26 | Anti-oxidation high-temperature infrared radiation ceramic coating and preparation method and application thereof |
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| CN101974259A (en) * | 2010-10-13 | 2011-02-16 | 中国科学院理化技术研究所 | Preparation method of Al-doped SiC powder infrared radiation coating |
| CN102219495A (en) * | 2011-03-29 | 2011-10-19 | 广东新劲刚超硬材料有限公司 | Infrared radiation coating and use method thereof |
| CN102417356A (en) * | 2010-09-27 | 2012-04-18 | 中国科学院理化技术研究所 | Nano silicon carbide series infrared radiation paint and its preparation method |
| CN102875177A (en) * | 2012-10-31 | 2013-01-16 | 淄博中硅陶瓷技术有限公司 | Infrared energy-saving coating of high-temperature kiln and preparation method thereof |
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| CN102417356A (en) * | 2010-09-27 | 2012-04-18 | 中国科学院理化技术研究所 | Nano silicon carbide series infrared radiation paint and its preparation method |
| CN101974259A (en) * | 2010-10-13 | 2011-02-16 | 中国科学院理化技术研究所 | Preparation method of Al-doped SiC powder infrared radiation coating |
| CN102219495A (en) * | 2011-03-29 | 2011-10-19 | 广东新劲刚超硬材料有限公司 | Infrared radiation coating and use method thereof |
| CN102875177A (en) * | 2012-10-31 | 2013-01-16 | 淄博中硅陶瓷技术有限公司 | Infrared energy-saving coating of high-temperature kiln and preparation method thereof |
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