CN113307659B - Preparation method for forming high-emissivity coating on heat insulation tile - Google Patents
Preparation method for forming high-emissivity coating on heat insulation tile Download PDFInfo
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- CN113307659B CN113307659B CN202110647944.8A CN202110647944A CN113307659B CN 113307659 B CN113307659 B CN 113307659B CN 202110647944 A CN202110647944 A CN 202110647944A CN 113307659 B CN113307659 B CN 113307659B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5062—Borides, Nitrides or Silicides
- C04B41/5071—Silicides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
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Abstract
The invention relates to a preparation method for forming a high-emissivity coating on a heat insulation tile. The preparation method is simple and easy to operate, the required equipment is conventional drying and sintering equipment, and the preparation process is safe, reliable, green and environment-friendly without harmful solvents; the prepared high-emissivity coating is high in strength, good in toughness, resistant to high-temperature airflow scouring, high in bonding strength with a heat insulation tile substrate, good in structural coordination and matching performance and excellent in thermal shock resistance; the preparation method is suitable for preparing high-emissivity coatings on the surfaces of various ceramic heat-insulating tiles such as quartz ceramic heat-insulating tiles, quartz/alumina ceramic heat-insulating tiles and the like, and has wide applicable material system range and universal preparation process.
Description
Technical Field
The invention relates to the technical field of preparation of thermal protection coatings, in particular to a preparation method of a high-emissivity coating.
Background
The high-temperature high-radiation coating is a thermal protection material, can be applied to the surface of a ceramic heat-insulating tile and has the double effects of scouring resistance and heat insulation. Because the ceramic heat insulation tile is of a porous structure, the aperture of the heat insulation tile substrate is large, when the coating is prepared, the coating is easy to permeate and is not easy to adhere to the surface, the coating can rapidly and continuously permeate into the substrate along the aperture of the heat insulation tile, and the coating with effective thickness is not easy to form. Therefore, besides the common factors such as the particle size of the filler, the solid content of the slurry, the dispersibility of the slurry, the flow rate of the gas in the spray gun, the atomization degree of the sprayed slurry and the thickness of the coating, the penetration depth of the coating, the thickness of the coating, the density of the coating, the drying mode of the coating, the sintering mode of the coating and the interface strength of the coating, which influence the quality of the coating on the surface of the ceramic heat-insulating tile, the quality of the coating can be influenced.
Considering that in the actual spraying process of the surface of the ceramic heat insulation tile, due to factors such as coating leakage, solvent evaporation, poor adaptability of spray gun parameter setting and the like, agglomeration and balling are easy to occur in the spraying process, the coating is easy to have phenomena such as internal layering, edge curling and falling off in the natural drying process, and the phenomena such as surface bulging, cracking and the like are caused after the sintered coating is sintered.
Therefore, in view of the above disadvantages, it is desirable to provide a method for preparing a high emissivity coating, which can realize uniform, stable and high quality preparation of the coating.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problems that the prior art is easy to generate agglomeration and balling in the spraying process, the coating is easy to generate the phenomena of internal delamination, edge curling, falling off and the like in the natural drying process, and the sintered coating generates surface bulging, cracking and the like.
(II) technical scheme
In order to solve the technical problem, the invention provides a preparation method for forming a high-emissivity coating on a heat insulation tile, which comprises the following steps:
(1) ball-milling and screening the high-emissivity coating to be sprayed to obtain a uniformly dispersed high-emissivity coating;
(2) dividing the uniformly dispersed high-emissivity coating obtained in the step (1) into a first part high-emissivity coating and a second part high-emissivity coating, adding a first modified solution into the first part high-emissivity coating to obtain a first modified high-emissivity coating, and adding a second modified solution into the second part high-emissivity coating to obtain a second modified high-emissivity coating;
(3) pretreating the surface of a heat insulation tile to be sprayed;
(4) spraying a first modified solution on the surface of a heat insulation tile to be sprayed at least once, and then spraying the first modified high-emissivity coating at least once;
(5) repeating the step (4) at least once, and then naturally airing to obtain a first spraying sample piece;
(6) spraying a first modified high-emissivity coating on the surface of the first spraying sample piece, and scraping off the coating which is not infiltrated into the pores of the first spraying sample piece;
(7) repeating the step (6) at least once to obtain a second spraying sample piece;
(8) spraying a second modified high-emissivity coating on the surface of the second spraying sample piece to obtain a third spraying sample piece;
(9) drying the third spraying sample to obtain a fourth spraying sample;
(10) and sintering the fourth spraying sample piece to obtain the heat insulation tile containing the high-emissivity coating.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
(1) the first and second modification solutions are used in the invention, so that the wettability of the coating and the heat insulation tile can be increased, the volatility of the coating is reduced, the cracking of the coating caused by too fast volatilization is slowed down, and the spraying effect is improved.
(2) The high-emissivity coating prepared by the preparation method disclosed by the invention is high in strength, good in toughness, resistant to high-temperature airflow scouring, high in bonding strength with a heat insulation tile substrate, good in structure coordination matching property and excellent in thermal shock resistance.
(3) The preparation method is simple and easy to operate, the required equipment is conventional drying and sintering equipment, and the preparation process is safe, reliable, green and environment-friendly, and has no harmful solvent.
(4) The preparation method is suitable for preparing the high-emissivity coatings on the surfaces of various ceramic heat-insulating tiles such as quartz ceramic heat-insulating tiles, quartz/alumina ceramic heat-insulating tiles and the like, and has wide applicable material system range and universal preparation process.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a preparation method of a high-emissivity coating, which comprises the following steps:
(1) transferring the high emissivity coating into a ball milling tank, carrying out ball milling for 5-10 minutes at the rotating speed of 150-;
(2) dividing the uniformly dispersed high-emissivity coating obtained in the step (1) into a first part high-emissivity coating and a second part high-emissivity coating, adding a first modified solution into the first part high-emissivity coating, dispersing for 5-30 minutes to obtain a first modified high-emissivity coating, adding a second modified solution into the second part high-emissivity coating, and dispersing for 5-30 minutes to obtain a second modified high-emissivity coating;
the first modification solution and the second modification solution can improve the manufacturability of spraying the coating on the surface of the ceramic heat insulation tile;
(3) after the surface of a rigid ceramic tile to be sprayed is treated to be flat, powder on the surface and in pores of the ceramic heat insulation tile is cleaned;
(4) uniformly spraying a first modifying liquid on the surface of the rigid heat insulation tile to be sprayed for 2-5 times by using a spray gun, and then uniformly spraying a first modifying high-emissivity coating for 1-3 times;
the first modification solution is sprayed on the surface of the rigid heat insulation tile to be sprayed, so that the ceramic heat insulation tile can be soaked, the coating permeation effect is improved, and the coating is prevented from being dried too fast;
(5) and (5) repeating the step (4) for 2-5 times, and naturally standing for 3-15 minutes to obtain a first spraying sample piece.
(6) Uniformly spraying 1-3 times of first modified high-emissivity coating on the surface of the first spraying sample obtained in the step (5) by using a spray gun, slightly scraping away the coating which is not infiltrated into the pores of the first spraying sample by using a blade, and observing the state of a surface coating;
(7) repeating the step (6) until no hole is observed after the paint floating on the surface of the first spraying sample piece is scraped off, and obtaining a second spraying sample piece at the moment;
(8) uniformly spraying a second modified high-emissivity coating on the surface of the second spraying sample piece obtained in the step (7) for 1-5 times, transferring the sample piece to a dry and ventilated place, and naturally airing to obtain a third spraying sample piece;
(9) placing the third spraying sample piece obtained in the step (8) in a blast drying oven, treating for 5-20 hours (for example, 5 hours, 8 hours, 12 hours, 15 hours, 17 hours and 20 hours) at 100-200 ℃ (for example, 100 ℃, 120 ℃, 135 ℃, 150 ℃, 175 ℃, 190 ℃ and 200 ℃), and taking out to obtain a fourth spraying sample piece;
(10) and (3) transferring the fourth spraying sample piece obtained in the step (9) into a high-temperature muffle furnace with the temperature rise rate of 1-10 ℃/min being 800-.
According to some preferred embodiments, in step (1), the high emissivity coating is a composition of ethanol, deionized water, borosilicate glass powder, borosilicate, molybdenum silicide, tantalum silicide, alumina powder, quartz glass powder; wherein, the ratio of ethanol to deionized water is (10-30) to 1 (for example, 10: 1, 12: 1, 14: 1, 16: 1, 18: 1, 20: 1, 22: 1, 24: 1, 26: 1, 28: 1, 30: 1);
the total mass of ethanol and deionized water to the solid is (1-3) to 1 (for example, 1: 1, 1.3: 1, 1.6: 1, 1.8: 1, 2: 1, 2.2: 1, 2.5: 1, 2.7: 1, 3: 1);
the proportion of the borosilicate glass powder, the borosilicate, the molybdenum silicide, the tantalum silicide, the alumina powder and the quartz glass powder is (10-20): (1-5): (10-20): (1-3): (5-10), for example, 10: 1: 5, 12: 3: 15: 17: 2: 8, 13: 4: 16: 13: 3: 9, etc.
According to some preferred embodiments, the high emissivity coating has a solids content of 60% to 80%.
According to some preferred embodiments, in the step (2), the first modified solution comprises 100 parts of ethanol, 10 to 20 parts of deionized water (for example, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts and 20 parts), 0.1 to 2 parts of silane coupling agent (for example, 0.1 part, 0.6 part, 0.9 part, 1.0 part, 1.2 parts, 1.5 parts, 1.8 parts and 2.0 parts); the silane coupling agent may be KH550, KH560, KH570, or the like.
According to some preferred embodiments, the first modified high emissivity coating has a solids content of 59% to 79% (e.g. may be 59%, 63%, 66%, 70%, 73%, 76%, 79%); or the first modification solution is added in an amount of 1-2% (e.g., 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%) of the first portion of the high emission coating.
According to some preferred embodiments, the second modification solution comprises 100 parts of ethanol and 5-10 parts of deionized water.
According to some preferred embodiments, the second modified high emissivity coating has a solids content of 25% to 60% (e.g. may be (25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%). or the second modifying solution is added in an amount of 0.5 to 1 times (e.g. may be 0.5 times, 0.6 times, 0.7 times, 0.8 times, 0.9 times, 1 times) the second portion of the high emissivity coating.
According to some preferred embodiments, in step (3), the heat-insulating tile is a ceramic heat-insulating tile;
more preferably, the heat insulation tile is a quartz ceramic heat insulation tile or a quartz/alumina ceramic heat insulation tile.
Example 1
(1) Transferring the high-emissivity coating with the solid content of 63% into a ball milling tank, carrying out ball milling for 5 minutes at the rotating speed of 150r/min, screening the coating in the ball milling tank by a 100-mesh copper net, and placing the coating in a clean container to obtain the uniformly dispersed high-emissivity coating for later use. The high-emissivity coating is a composition of ethanol, deionized water, borosilicate glass powder, borosilicate, molybdenum silicide, tantalum silicide, alumina powder and quartz glass powder; wherein the mass ratio of the ethanol to the deionized water is 10: 1, the ratio of the total mass of the ethanol to the deionized water to the solid content is 1: 1, and the ratio of the borosilicate glass powder, the borosilicate, the molybdenum silicide, the tantalum silicide, the alumina powder and the quartz glass powder is 10: 1: 10: 1: 5.
(2) Dividing the uniformly dispersed high-emissivity coating obtained in the step (1) into a first part high-emissivity coating and a second part high-emissivity coating, and evenly distributing the first part high-emissivity coating and the second part high-emissivity coating into 50 parts by mass; adding 0.5 part by mass of the first modified solution into 50 parts by mass of the first partial high-emissivity coating, and dispersing for 5 minutes to prepare a first modified high-emissivity coating; adding 25 parts by mass of the second modified solution into 50 parts by mass of the second partial high-emissivity coating, and dispersing for 5 minutes to prepare a second modified high-emissivity coating;
the first modified solution comprises the following components in parts by weight: 100 parts of ethanol, 12 parts of deionized water and 2 parts of KH560, wherein the second modified solution comprises the following components in parts by mass: 100 parts of ethanol and 5 parts of deionized water;
(3) and after the surface of the quartz ceramic heat insulation tile to be sprayed is treated to be flat, cleaning powder on the surface and in pores of the quartz ceramic heat insulation tile.
(4) Uniformly spraying a first modification solution on the surface of the quartz ceramic heat insulation tile to be sprayed for 2 times by using a spray gun, and then uniformly spraying a first modification high-emissivity coating for 2 times;
(5) repeating the step (4) for 5 times, and naturally standing for 15 minutes to obtain a first spraying sample piece;
(6) uniformly spraying 3 times of first modified high-emissivity coating on the surface of the first spraying sample obtained in the step (5) by using a spray gun, slightly scraping away the coating which is not infiltrated into the pores of the first spraying sample by using a blade, and observing the state of a surface coating;
(7) repeating the step (6) until the coating which is not soaked in the pores of the first spraying sample piece is scraped off, and observing the pores without pores, thereby obtaining a second spraying sample piece;
(8) uniformly spraying a second modified high-emissivity coating on the surface of the second spraying sample piece for 3 times, transferring the sample piece to a dry and ventilated place, and naturally airing to obtain a third spraying sample piece;
(9) and (5) placing the third spraying sample piece obtained in the step (8) in an air-blast drying oven, treating for 5 hours at 100 ℃, and taking out to obtain a fourth spraying sample piece.
(10) And (4) transferring the fourth spraying sample piece obtained in the step (9) to a high-temperature muffle furnace at 800 ℃, heating to 1200 ℃ at a heating rate of 5 ℃/min, preserving heat for 18 minutes, then closing the muffle furnace, and taking out the sample piece in the muffle furnace when naturally cooling to 800 ℃, thus finishing the preparation of the high-emissivity coating on the surface of the ceramic heat-insulating tile.
The thickness of the prepared high-emissivity coating is 0.2mm, the bonding strength of the coating and the ceramic tile is greater than the strength of the ceramic tile, and the emissivity of the coating is greater than 0.8.
Example 2
This example 2 is substantially the same as example 1 except that: in the step (2), the first modified solution comprises 100 parts by mass of ethanol, 18 parts by mass of deionized water and 1.3 parts by mass of a silane coupling agent; the second modified solution comprises 100 parts of ethanol and 8 parts of deionized water in parts by mass.
The thickness of the prepared high-emissivity coating is 0.3mm, the bonding strength of the coating and the ceramic tile is greater than the strength of the ceramic tile, the coating is bright and compact after being sintered, and the emissivity of the coating is greater than 0.8.
Example 3
This example 3 is substantially the same as example 1 except that:
in step (2), the high emissivity coating has a solids content of 80%.
The thickness of the prepared high-emissivity coating is 0.5mm, the bonding strength of the coating and the ceramic tile is greater than the strength of the ceramic tile, the coating is bright and compact after being sintered, and the emissivity of the coating is greater than 0.8.
Example 4
This example 4 is substantially the same as example 1 except that: in the step (3), the ceramic heat insulation tile to be sprayed is a quartz/alumina ceramic heat insulation tile.
The thickness of the prepared high-emissivity coating is 0.15mm, the bonding strength of the coating and the ceramic tile is greater than the strength of the ceramic tile, the coating is bright and compact after being sintered, and the emissivity of the coating is greater than 0.8.
Example 5
(1) Transferring the high-emissivity coating with the solid content of 63% into a ball milling tank, carrying out ball milling for 5 minutes at the rotating speed of 150r/min, screening the coating in the ball milling tank by a 100-mesh copper net, and placing the coating in a clean container to obtain the uniformly dispersed high-emissivity coating for later use. The high-emissivity coating is a composition of ethanol, deionized water, borosilicate glass powder, borosilicate, molybdenum silicide, tantalum silicide, alumina powder and quartz glass powder; wherein the mass ratio of the ethanol to the deionized water is 10: 1, the ratio of the total mass of the ethanol to the deionized water to the solid content is 1: 1, and the ratio of the borosilicate glass powder, the borosilicate, the molybdenum silicide, the tantalum silicide, the alumina powder and the quartz glass powder is 10: 1: 10: 1: 5.
(2) And after the surface of the quartz ceramic heat insulation tile to be sprayed is treated to be smooth, cleaning powder on the surface and in pores of the quartz ceramic heat insulation tile.
(3) Uniformly spraying high-emissivity coating on the surface of a quartz ceramic heat-insulating tile to be sprayed for 2 times by using a spray gun to obtain a first spraying sample piece;
(4) and (3) placing the spraying sample piece in a forced air drying oven, treating for 5 hours at 100 ℃, and taking out to obtain a second spraying sample piece.
(5) And transferring the second spraying sample piece into a high-temperature muffle furnace at 800 ℃, heating to 1200 ℃ at a heating rate of 5 ℃/min, preserving heat for 18 minutes, then closing the muffle furnace, and taking out the sample piece in the muffle furnace when naturally cooling to 800 ℃, thus finishing the preparation of the high-emissivity coating on the surface of the ceramic heat-insulating tile.
The thickness of the prepared high-emissivity coating is 0.1mm, the bonding strength of the coating and the ceramic tile is smaller than the strength of the ceramic tile, the coating has a cracking phenomenon after being sintered, and the emissivity of the coating is larger than 0.8.
According to the embodiments 1 to 5, the first and second modification solutions used in the preparation process can improve the infiltration effect of the coating and the heat insulation tile, improve the bonding performance of the coating and the heat insulation tile base body, and improve the strength of the coating and the bonding force of the coating and the heat insulation tile, so that the coating is bright and compact without cracking after being sintered.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A method of forming a high emissivity coating on a thermal insulating tile, the method comprising the steps of:
(1) ball milling the high emissivity coating to be sprayed, and screening to obtain the uniformly dispersed high emissivity coating, wherein the high emissivity coating is a composition of ethanol, deionized water, borosilicate glass powder, borosilicate, molybdenum silicide, tantalum silicide, alumina powder and quartz glass powder, the solid content of the high emissivity coating is 60-80%, the ball milling is carried out in a ball milling tank, the ball milling time is 5-10min, the ball milling rotation speed is 150-250r/min, and the screening is carried out by adopting a 100-mesh copper net;
(2) dividing the uniformly dispersed high-emissivity coating obtained in the step (1) into a first part of high-emissivity coating and a second part of high-emissivity coating, adding a first modified solution into the first part of high-emissivity coating, obtaining a first modified high-emissivity coating, adding a second modified solution into the second part of high-emissivity coating to obtain a second modified high-emissivity coating, wherein the first modified solution comprises 100 parts of ethanol, 10-20 parts of deionized water and 0.1-2 parts of silane coupling agent by mass, the second modified solution comprises 100 parts of ethanol and 5-10 parts of deionized water by mass, the addition amount of the first modified solution is 1-2% of the first part of the high-emission paint, the addition amount of the second modification solution is 0.5-1 time of that of the second part of the high-emissivity coating;
(3) pretreating the surface of a heat insulation tile to be sprayed;
(4) spraying the first modified solution on the surface of the heat insulation tile to be sprayed at least once, and then spraying the first modified high-emissivity coating at least once;
(5) repeating the step (4) at least once, and then naturally airing to obtain a first spraying sample piece;
(6) spraying the first modified high-emissivity coating on the surface of the first spraying sample piece, and scraping off the coating which is not infiltrated into the pores of the first spraying sample piece;
(7) repeating the step (6) at least once to obtain a second spraying sample piece;
(8) spraying the second modified high-emissivity coating on the surface of the second spraying sample piece to obtain a third spraying sample piece;
(9) drying the third spraying sample to obtain a fourth spraying sample;
(10) and sintering the fourth spraying sample piece to obtain the heat insulation tile containing the high-emissivity coating, wherein the sintering step is as follows: and transferring the fourth spraying sample piece into a high-temperature muffle furnace at the temperature of 800-.
2. The method of claim 1, wherein:
in the step (3), the pretreatment comprises the steps of flattening the surface of the heat insulation tile and then cleaning the powder on the surface and in the pores of the heat insulation tile.
3. The method of claim 2, wherein:
in the step (3), the heat insulation tile is a ceramic heat insulation tile.
4. The method of claim 2, wherein:
in the step (3), the heat insulation tile is a quartz ceramic heat insulation tile or a quartz/alumina ceramic heat insulation tile.
5. The method of claim 1, wherein:
in the step (4), the spraying times of the first modified solution are 2-5 times, and the spraying times of the first modified high-emissivity coating are 1-3 times.
6. The method of claim 1, wherein:
in the step (5), the number of times of repeating the step (4) is 2 to 5 times.
7. The method of claim 1, wherein:
in the step (6), the first modified high emissivity coating is sprayed 1-3 times.
8. The method of claim 1, wherein:
in the step (8), the second modified high-emissivity coating is sprayed for 1 to 5 times.
9. The method of claim 1, wherein:
in the step (9), the drying is carried out in an air-blast drying oven, the drying temperature is 100 ℃ to 200 ℃, and the drying time is 5 to 20 hours.
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| CN108658626A (en) * | 2018-05-25 | 2018-10-16 | 莱芜亚赛陶瓷技术有限公司 | MoSi2-SiO2Borosilicate coating with thermostability and high emissivity and the preparation method and application thereof |
| CN110653136A (en) * | 2019-10-08 | 2020-01-07 | 航天特种材料及工艺技术研究所 | Surface oxidation-resistant high-emissivity coating of porous fibrous carbon-based heat-insulating material and preparation method thereof |
| CN112209743A (en) * | 2019-07-09 | 2021-01-12 | 航天特种材料及工艺技术研究所 | High-temperature-resistant high-emissivity coating and preparation method thereof |
| WO2021077296A1 (en) * | 2019-10-22 | 2021-04-29 | Foshan Shi Shunde Jetwell Stainless Steel Products Limited | Non-stick cookware coating |
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2021
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| CN112209743A (en) * | 2019-07-09 | 2021-01-12 | 航天特种材料及工艺技术研究所 | High-temperature-resistant high-emissivity coating and preparation method thereof |
| CN110653136A (en) * | 2019-10-08 | 2020-01-07 | 航天特种材料及工艺技术研究所 | Surface oxidation-resistant high-emissivity coating of porous fibrous carbon-based heat-insulating material and preparation method thereof |
| WO2021077296A1 (en) * | 2019-10-22 | 2021-04-29 | Foshan Shi Shunde Jetwell Stainless Steel Products Limited | Non-stick cookware coating |
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