CN110835477A - High-temperature-resistant graphene oxidation-resistant nano ceramic coating and preparation method thereof - Google Patents
High-temperature-resistant graphene oxidation-resistant nano ceramic coating and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 62
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 28
- 230000003647 oxidation Effects 0.000 title claims abstract description 19
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000000843 powder Substances 0.000 claims abstract description 70
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 52
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 36
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000919 ceramic Substances 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 230000001681 protective effect Effects 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 25
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims description 24
- 239000002518 antifoaming agent Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 230000008719 thickening Effects 0.000 claims description 23
- 239000002270 dispersing agent Substances 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229920006243 acrylic copolymer Polymers 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 6
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 4
- 229920001568 phenolic resin Polymers 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- -1 graphite alkene Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000011157 advanced composite material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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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Abstract
The invention discloses a high-temperature-resistant graphene oxidation-resistant nano ceramic coating, wherein an inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol; the outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at high temperature. Has the advantages that: the inner layer is prepared from graphene, nano-alumina powder and nano-titanium oxide powder, and the high heat conduction and far infrared functions of the graphene can be utilized to improve the ceramic performance. By adopting the outer layer structure, the graphene can be prevented from being oxidized, and the far infrared function of the inner layer is not interfered. The ceramic coating can be applied to a high-temperature and medium-low temperature radiator below 800 ℃, is high-temperature resistant, and has high heat conduction and far infrared functions. Due to the super heat conductivity of the graphene, the thermal conductivity of the coating can reach 50-80W/M.k after the coating is applied, and the infrared emissivity can reach over 0.9. And the nano alumina powder and the nano silica powder are selected to contribute to improving the infrared emissivity of the coating.
Description
Technical Field
The invention relates to the field of ceramic coatings, in particular to a high-temperature-resistant graphene oxidation-resistant nano ceramic coating and a preparation method thereof.
Background
The high-performance ceramic coating technology is an edge science which is cross-derived from a high-performance ceramic material, an advanced composite material, a modern surface engineering technology and the like, is a very active disciplinary branch in the modern high and new technical field, and has wide application in various fields of national economy. The high-performance ceramic is a new generation ceramic which is prepared by using a refined high-purity superfine artificially-synthesized inorganic compound as a raw material and adopting a precisely controlled preparation process for sintering, and has the performance far superior to that of the traditional ceramic, and is also called advanced ceramic, fine ceramic, novel ceramic or high-technology ceramic.
The graphene has high thermal conductivity and high infrared radiation functions, and when the graphene is applied to the ceramic coating, the performance of the ceramic coating can be effectively improved, such as the high thermal conductivity and high infrared radiation functions, but the graphene material is very easy to oxidize in an air environment, so that the application function of the graphene material can be lost, for example, the published Chinese invention patent with the publication number of CN105753425A and the patent name of 'a graphene alumina-based far infrared heating coating and a preparation method thereof' discloses the graphene alumina-based far infrared heating coating, but has great defects in oxidation resistance, and the thermal conductivity and the infrared emissivity of the coating.
Disclosure of Invention
The invention aims to solve the problems and provide a high-temperature-resistant graphene oxidation-resistant nano ceramic coating and a preparation method thereof, which can improve the high-temperature resistance of the ceramic coating and simultaneously avoid graphene oxidation.
The invention realizes the purpose through the following technical scheme:
a high-temperature resistant graphene oxidation resistant nano ceramic coating comprises a two-layer structure, namely an inner layer and an outer layer;
the inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol;
the outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at the high temperature of 300-400 ℃.
Preferably, the inner layer comprises the following raw materials in parts by weight:
5-10 parts of graphene;
15-25 parts of nano alumina powder;
15-25 parts of nano titanium oxide powder;
40-50 parts of silica sol;
0.3-0.5 part of defoaming agent;
0.2-0.4 part of dispersant;
0.3 to 0.5 portion of thickening and leveling agent.
Further, the thickness of the silicon dioxide protective film is 4-6 μm.
Further, the thickness of the inner layer is 6-10 μm.
By adopting the technical scheme, the ceramic coating is divided into two layers, the inner layer mainly adopts graphene, nano alumina powder and nano titanium oxide powder, silica sol is adopted as a solvent for combination, and the inner layer is coated on a product, so that the high heat conduction and high infrared radiation functions of the graphene can be utilized, and the high temperature resistance of the product can be improved. The outer layer is mainly ceramic resin, the ceramic resin forms a layer of high-purity silicon dioxide protective film at high temperature, the silicon dioxide protective film is 4-6 microns, the inner layer can be protected, graphene oxidation is avoided, and the far infrared function of the inner layer structure cannot be influenced.
A preparation method of a high-temperature-resistant graphene oxidation-resistant nano ceramic coating comprises the following steps:
(1) adding graphene, nano alumina powder and nano silica powder into a stirrer according to the weight ratio of the raw materials of the inner layer, and then adding silica sol, a defoaming agent, 0.2-0.4 of a dispersing agent and a thickening and leveling agent;
(2) stirring the inner layer raw material in a stirrer at the rotating speed of 800 plus 1000rpm for 15-20 minutes to fully and uniformly disperse the inner layer raw material in the silica sol so as to form an inner layer coating;
(3) coating the inner layer coating on a product, and then drying until the water in the silica sol is dispersed to form an inner layer;
(4) after the inner layer is dried, ceramic resin is coated and then sintered at a high temperature of 300-400 ℃, and the resin is burnt off to form a transparent silicon dioxide protective film as an outer layer.
Preferably, the defoaming agent is an organic silicon defoaming agent, the dispersing agent is sodium tripolyphosphate or sodium hexametaphosphate, and the thickening and leveling agent is an acrylic copolymer type thickening and leveling agent.
Preferably, the inner layer comprises the following raw materials in parts by weight:
7 parts of graphene;
20 parts of nano aluminum oxide;
20 parts of nano titanium oxide;
45 parts of silica sol;
0.4 part of defoaming agent;
0.3 part of a dispersant;
0.4 part of thickening and leveling agent.
In conclusion, the beneficial effects of the invention are as follows:
(1) the ceramic coating of this application sets up through two-layer structure, and graphite alkene, nanometer alumina powder, nanometer titanium oxide powder ratio are adopted to the inlayer, can utilize high heat conduction, the far infrared function of graphite alkene, improve ceramic properties, still adopt nanometer alumina powder, nanometer titanium oxide powder to pass through the silica sol and combine.
(2) By adopting the outer layer structure, the graphene oxidation can be avoided, and the far infrared function of the inner layer is not interfered.
(3) The ceramic coating can be applied to radiators with high temperature below 800 ℃ and medium and low temperature, is high temperature resistant, and has high heat conduction and far infrared functions.
Due to the super heat conductivity and high infrared performance of the graphene, the thermal conductivity of the coating can reach 50-80W/M.k after the coating is implemented, and the infrared emissivity can reach over 0.9. And the nano alumina powder and the nano silica powder are selected to contribute to improving the infrared emissivity of the coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The first embodiment is as follows:
a high-temperature resistant graphene oxidation resistant nano ceramic coating comprises a two-layer structure, namely an inner layer and an outer layer;
the inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol; the inner layer comprises the following raw materials in parts by weight: 10 parts of graphene, 25 parts of nano alumina powder and 25 parts of nano titanium oxide powder; 50 parts of silica sol.
The outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at a high temperature of 400 ℃. The silicon dioxide protective film is high-purity silicon dioxide. Wherein the ceramic resin is the mixture of ceramic powder and phenolic resin.
Wherein, the thickness of the silicon dioxide protective film is 4-6 μm, and the preferable thickness is 5 um.
Further, the thickness of the inner layer is 6-10 μm, preferably 8 um.
The preparation method comprises the following steps:
(1) adding 10 parts of graphene, 25 parts of nano alumina powder and 25 parts of nano silica powder into a stirrer according to the weight ratio, wherein the stirrer is a high-speed stirrer, and then adding 50 parts of silica sol, 0.5 part of defoaming agent, 0.4 part of dispersing agent and 0.5 part of thickening and leveling agent;
(2) stirring the inner layer raw material in a stirrer at the rotating speed of 1000rpm for 20 minutes to fully and uniformly disperse the inner layer raw material in the silica sol so as to form an inner layer coating;
(3) coating the inner layer coating on a product, and then drying until the water in the silica sol is dispersed to form an inner layer;
(4) after the inner layer is dried, a ceramic resin is coated and then sintered at a high temperature of 400 ℃, the resin is burned off to form a transparent silica protective film as an outer layer, and the formed silica is high-purity silica.
Preferably, the defoaming agent is an organic silicon defoaming agent, the dispersing agent is sodium tripolyphosphate or sodium hexametaphosphate, and the thickening and leveling agent is an acrylic copolymer type thickening and leveling agent.
Example two:
a high-temperature resistant graphene oxidation resistant nano ceramic coating comprises a two-layer structure, namely an inner layer and an outer layer;
the inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol; the inner layer comprises the following raw materials in parts by weight: 5 parts of graphene, 15 parts of nano alumina powder and 15 parts of nano titanium oxide powder; 40 parts of silica sol.
The outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at a high temperature of 300 ℃. The silicon dioxide protective film is high-purity silicon dioxide. Wherein the ceramic resin is the mixture of ceramic powder and phenolic resin.
Wherein, the thickness of the silicon dioxide protective film is 4-6 μm, and the thickness is preferably 4 um.
The thickness of the inner layer is 6-10 μm, preferably 6 um.
The preparation method comprises the following steps:
(1) adding 5 parts of graphene, 15 parts of nano alumina powder and 15 parts of nano silica powder into a stirrer according to the weight ratio, wherein the stirrer is a high-speed stirrer, and then adding 40 parts of silica sol, 0.3 part of defoaming agent, 0.2 part of dispersing agent and 0.3 part of thickening and leveling agent;
(2) stirring the inner layer raw material in a stirrer at the rotating speed of 800rpm for 15 minutes to fully and uniformly disperse the inner layer raw material in the silica sol so as to form an inner layer coating;
(3) coating the inner layer coating on a product, and then drying until the water in the silica sol is dispersed to form an inner layer;
(4) after the inner layer is dried, a ceramic resin is coated and then sintered at a high temperature of 300 ℃, the resin is burned off to form a transparent silica protective film as an outer layer, and the formed silica is high-purity silica.
Preferably, the defoaming agent is an organic silicon defoaming agent, the dispersing agent is sodium tripolyphosphate or sodium hexametaphosphate, and the thickening and leveling agent is an acrylic copolymer type thickening and leveling agent.
Example three:
a high-temperature resistant graphene oxidation resistant nano ceramic coating comprises a two-layer structure, namely an inner layer and an outer layer;
the inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol; the inner layer comprises the following raw materials in parts by weight: 8 parts of graphene, 20 parts of nano alumina powder and 20 parts of nano titanium oxide powder; 45 parts of silica sol.
The outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at the high temperature of 350 ℃. The silicon dioxide protective film is high-purity silicon dioxide. Wherein the ceramic resin is the mixture of ceramic powder and phenolic resin,
wherein, the thickness of the silicon dioxide protective film is 4-6 μm, and the thickness is preferably 5 um.
The thickness of the inner layer is 6-10 μm, preferably 8 um.
The preparation method comprises the following steps:
(1) adding 8 parts of graphene, 20 parts of nano alumina powder and 20 parts of nano silica powder into a stirrer according to the weight ratio, wherein the stirrer is a high-speed stirrer, and then adding 45 parts of silica sol, 0.4 part of defoaming agent, 0.3 part of dispersing agent and 0.4 part of thickening and leveling agent;
(2) stirring the inner layer raw material in a stirrer at the rotating speed of 900rpm for 18 minutes to fully and uniformly disperse the inner layer raw material in the silica sol so as to form an inner layer coating;
(3) coating the inner layer coating on a product, and then drying until the water in the silica sol is dispersed to form an inner layer;
(4) after the inner layer is dried, a ceramic resin is coated and then sintered at a high temperature of 350 c, the resin is burned off to form a transparent silica protective film as an outer layer, and the silica formed is high-purity silica.
Preferably, the defoaming agent is an organic silicon defoaming agent, the dispersing agent is sodium tripolyphosphate or sodium hexametaphosphate, and the thickening and leveling agent is an acrylic copolymer type thickening and leveling agent.
Example four:
a high-temperature resistant graphene oxidation resistant nano ceramic coating comprises a two-layer structure, namely an inner layer and an outer layer;
the inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol; the inner layer comprises the following raw materials in parts by weight: 8 parts of graphene, 23 parts of nano alumina powder and 23 parts of nano titanium oxide powder; 47 parts of silica sol.
The outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at a high temperature of 400 ℃. The silicon dioxide protective film is high-purity silicon dioxide. Wherein the ceramic resin is the mixture of ceramic powder and phenolic resin,
wherein, the thickness of the silicon dioxide protective film is 4-6 μm, and the thickness is preferably 5 um.
The thickness of the inner layer is 6-10 μm, preferably 8 um.
The preparation method comprises the following steps:
(1) adding 8 parts of graphene, 23 parts of nano alumina powder and 23 parts of nano silica powder into a stirrer according to the weight ratio, wherein the stirrer is a high-speed stirrer, and then adding 47 parts of silica sol, 0.4 part of defoaming agent, 0.4 part of dispersing agent and 0.3 part of thickening and leveling agent;
(2) stirring the inner layer raw material in a stirrer at the rotating speed of 1000rpm for 18 minutes to fully and uniformly disperse the inner layer raw material in the silica sol so as to form an inner layer coating;
(3) coating the inner layer coating on a product, and then drying until the water in the silica sol is dispersed to form an inner layer;
(4) after the inner layer is dried, ceramic resin is coated, and then the inner layer is sintered at a high temperature of 380 ℃, the resin is burnt off to form a transparent silica protective film as an outer layer, and the formed silica is high-purity silica.
Preferably, the defoaming agent is an organic silicon defoaming agent, the dispersing agent is sodium tripolyphosphate or sodium hexametaphosphate, and the thickening and leveling agent is an acrylic copolymer type thickening and leveling agent.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. The high-temperature-resistant graphene oxidation-resistant nano ceramic coating is characterized in that: the ceramic coating comprises a two-layer structure, namely an inner layer and an outer layer;
the inner layer mainly comprises graphene, nano alumina powder and nano silica powder, and the graphene, the nano alumina powder and the nano titanium oxide powder are combined through silica sol;
the outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at the high temperature of 300-400 ℃.
2. The high-temperature-resistant graphene oxidation-resistant nano-ceramic coating according to claim 1, wherein: the inner layer raw material also comprises a defoaming agent and a thickening and leveling agent, and the inner layer raw material comprises the following components in parts by weight:
5-10 parts of graphene;
15-25 parts of nano alumina powder;
15-25 parts of nano titanium oxide powder;
40-50 parts of silica sol;
0.3-0.5 part of defoaming agent;
0.2-0.4 part of dispersant;
0.3 to 0.5 portion of thickening and leveling agent.
3. The high-temperature-resistant graphene oxidation-resistant nano-ceramic coating according to claim 1, wherein: the thickness of the silicon dioxide protective film is 4-6 mu m.
4. The high-temperature-resistant graphene oxidation-resistant nano-ceramic coating according to claim 1, wherein: the thickness of the inner layer is 6-10 μm.
5. The preparation method of the high-temperature-resistant graphene oxide-proof nano ceramic coating according to claim 2 is characterized by comprising the following steps:
(1) adding graphene, nano alumina powder and nano silica powder into a stirrer according to the weight ratio of the raw materials of the inner layer, and then adding silica sol, a defoaming agent, a dispersing agent and a thickening and leveling agent according to the ratio;
(2) stirring the inner layer raw material in a stirrer at the rotating speed of 800 plus 1000rpm for 15-20 minutes to fully and uniformly disperse the inner layer raw material in the silica sol so as to form an inner layer coating;
(3) coating the inner layer coating on a product, and then drying until the water in the silica sol is dispersed to form an inner layer;
(4) after the inner layer is dried, ceramic resin is coated and then sintered at a high temperature of 300-400 ℃, and the resin is burnt off to form a transparent silicon dioxide protective film as an outer layer.
6. The preparation method of the high-temperature-resistant graphene oxide-proof nano ceramic coating according to claim 5, characterized in that: the defoaming agent is an organic silicon defoaming agent, the dispersing agent is sodium tripolyphosphate or sodium hexametaphosphate, and the thickening and leveling agent is an acrylic copolymer type thickening and leveling agent.
7. The preparation method of the high-temperature-resistant graphene oxide-proof nano ceramic coating according to claim 6, characterized in that: the inner layer comprises the following raw materials in parts by weight:
7 parts of graphene;
20 parts of nano alumina powder;
20 parts of nano titanium oxide powder;
45 parts of silica sol;
0.4 part of defoaming agent;
0.3 part of a dispersant;
0.4 part of thickening and leveling agent.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115178449A (en) * | 2022-07-08 | 2022-10-14 | 德汇新材料科技南通有限公司 | Preparation process of high-temperature-resistant graphene ceramic cavity and cavity |
| CN115321992A (en) * | 2022-09-06 | 2022-11-11 | 哈尔滨工业大学 | GNPs/YSZ composite ceramic powder and preparation method and application thereof |
| CN115521647A (en) * | 2022-10-25 | 2022-12-27 | 江苏创仕澜传输科技有限公司 | Infrared sintered coating and preparation method thereof |
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