High-performance ceramic coating as well as preparation method and spraying method thereof

Abstract

The invention provides a high-performance ceramic coating and a preparation method and a spraying method thereof, the ceramic coating is composed of a binder, a ceramic filler, a functional additive, color paste and a diluent, and the ceramic filler comprises silicon carbide and zirconium oxide in a mass ratio of (4.8-5.5): 3. All the components and proportions of the ceramic coating are designed, so that all the components play a synergistic role. The specific parts of the binder ensure that the coating has good adhesiveness, and silicon carbide and zirconium oxide in the ceramic filler are matched according to a specific proportion, so that the hardness and wear resistance of the coating are improved. The comprehensive performance of the coating is optimized by adding a proper amount of functional additives, the color stability is ensured by the color paste, and the constructability of the coating is ensured by the diluent. The paint has the advantages of high coating hardness, excellent wear resistance, strong paint film adhesion and long service life, is suitable for the technical field of kitchen use, and is convenient to popularize and implement.

Description

Technical Field

[0001] This application belongs to the technical field of coatings, and particularly relates to a high-performance ceramic coating, a preparation method thereof, and a spraying method thereof. Background Art

[0002] In the prior art, coating materials have been widely used in industrial and civil fields, and they play an important role in improving the surface properties of materials and extending the service life of materials. Traditional coating materials such as metal coatings can provide good electrical conductivity and certain mechanical strength, but they are prone to corrosion and have a limited service life in complex environments. Some organic resin coatings have certain corrosion resistance and good adhesion, but their high-temperature resistance is poor, and they perform poorly in terms of wear resistance and non-stickiness.

[0003] In the prior art, although metal coatings have high strength and good electrical conductivity and can effectively protect the substrate, they have deficiencies in corrosion resistance and high-temperature resistance. Especially in humid or high-temperature environments, they are prone to corrosion and performance degradation, affecting their long-term use effect and reliability. And organic resin coatings such as epoxy resin coatings have certain advantages in corrosion resistance and adhesion and can be closely combined with various substrates, but their high-temperature resistance is poor. They are prone to softening, deformation, and even decomposition under high-temperature conditions, and their wear resistance and non-stickiness are also difficult to meet the stringent requirements of high-end industrial and civil fields. In addition, there are also certain limitations in the bonding strength and comprehensive performance synergy of such coating materials with the substrate.

[0004] Therefore, in order to meet the requirements of high-end industrial and civil fields (especially the kitchenware field) for the multi-functional integration of coating materials in terms of high temperature resistance, corrosion resistance, wear resistance, non-stickiness, etc., and at the same time improve their biocompatibility and aesthetics, it is now urgent to make improvements to develop a high-performance ceramic coating, a preparation method thereof, and a spraying method thereof, so as to improve the overall performance and use effect of the product and expand its application scope. Summary of the Invention

[0005] This application aims to solve the technical problem that in the prior art, the service life of traditional organic resin coatings is relatively low. As the service life increases, the mechanical properties such as adhesion, corrosion resistance, temperature resistance, wear resistance, and non-stickiness of organic resin coatings will be significantly reduced, making them inapplicable to the kitchenware technology field and unable to be used as the surface coating of kitchenware, and proposes a high-performance ceramic coating.

[0006] To solve the technical problems proposed in this application, this application also provides a preparation method of a high-performance ceramic coating.

[0007] To solve the technical problems proposed in this application, this application also provides a spraying method of a high-performance ceramic coating.

[0008] The present application adopts the following solution: a high-performance ceramic coating, which is composed of the following components by weight: Binder: 45 parts - 55 parts Ceramic filler: 5 parts - 10 parts Functional additive: 1 part - 3 parts Color paste: 25 parts - 35 parts Diluent: 8 parts - 12 parts;

[0009] Among them, the ceramic filler includes silicon carbide and zirconia;

[0010] Among them, the mass ratio of the silicon carbide to the zirconia is (4.8 - 5.5):3.

[0011] In some feasible embodiments,

[0012] The particle size range of the silicon carbide is 15μm - 26μm;

[0013] The particle size range of the zirconia is 25μm - 35μm.

[0014] During the actual implementation process, when the ceramic coating is cured, polymethylpolysiloxane undergoes a cracking reaction. Silicon carbide is added as a filler, which can cooperate with the cracking process of polymethylpolysiloxane to promote the cracking reaction to proceed in the direction of generating more beneficial ceramic phases, thereby improving the degree of ceramization of the coating.

[0015] In some feasible embodiments,

[0016] The binder includes polymethylpolysiloxane and fumed silica;

[0017] Among them, the mass ratio of the polymethylpolysiloxane to the fumed silica is (6.5 - 8.2):3.

[0018] During the actual implementation process, by adding silicon carbide, the microstructure of the polymethylpolysiloxane-based ceramic coating can be improved. Silicon carbide particles can form a supporting framework structure in the coating, fill the pores generated after the cracking of polymethylpolysiloxane, reduce the porosity of the coating, improve the density and hardness of the coating, and ultimately enhance the wear resistance and corrosion resistance of the coating.

[0019] During the actual implementation process, by doping zirconia into silicon carbide, Si-O-Zr chemical bonds can be introduced into the supporting framework structure, significantly enhancing the binding force between zirconia and polymethylpolysiloxane, enabling the two to be better compatible, and thus significantly improving the comprehensive performance of the coating.

[0020] Furthermore, zirconia can play a role in toughening through phase transformation in ceramic coatings. When the coating is subjected to external forces or temperature changes, zirconia undergoes a phase transformation, absorbs energy, and inhibits the propagation of cracks, thereby improving the toughness and impact resistance of the coating. At the same time, the presence of zirconia particles can also affect the pyrolysis behavior of polymethylpolysiloxane and the formation of the ceramic phase, regulating the microstructure of the ceramic coating and making the paint film more uniform and dense.

[0021] In the actual implementation process, fumed silica has a large specific surface area and surface activity. During the preparation of the coating, silicon carbide particles will fill into the network structure of fumed silica, which can increase the viscosity and thixotropy of the coating, prevent the sedimentation and aggregation of silicon carbide particles, and make the coating have better application performance and stability.

[0022] In the actual implementation process, fumed silica can modify the surface of zirconia particles to form a stable coating layer, preventing the agglomeration of zirconia particles in the coating. This not only improves the dispersion uniformity of zirconia in the coating but also facilitates the exertion of the excellent properties of zirconia, such as high hardness, high toughness, and good thermal stability.

[0023] In some feasible embodiments,

[0024] The functional additives include propylene glycol methyl ether and dimethyl silicone oil;

[0025] wherein the mass ratio of the propylene glycol methyl ether to the dimethyl silicone oil is (0.5 - 1.2):1.

[0026] In some feasible embodiments,

[0027] The diluent includes isopropyl alcohol, cyclohexanone, and ethylene glycol monoethyl ether;

[0028] wherein the mass ratio of the isopropyl alcohol, the cyclohexanone, and the ethylene glycol monoethyl ether is (2.8 - 3.3):1:1.

[0029] To solve the technical problems raised in this application, this application also provides a method for preparing a high-performance ceramic coating, including the following steps:

[0030] Step 101. Preparation of the primer

[0031] According to a preset target ratio, the binder, ceramic filler, primer color paste, functional additives, and diluent are sequentially put into a high-speed disperser and dispersed for 15 min - 20 min under the conditions of 850 rpm - 1250 rpm and 25°C - 40°C to obtain the primer;

[0032] Step 102. Preparation of the topcoat

[0033] Put the binder, ceramic filler, topcoat color paste, functional additives, and diluent into a high-speed disperser in sequence according to the preset target ratio. After dispersing for 15 min - 20 min under the conditions of 850 rpm - 1250 rpm and 25°C - 40°C, the topcoat is obtained.

[0034] In some feasible embodiments, in step 101 and step 102, the binder is subjected to a curing treatment.

[0035] The curing treatment includes the following steps:

[0036] Step 201: Put the polymethylpolysiloxane and fumed silica into the curing barrel in sequence according to the preset target ratio. After curing for 4 h - 6 h at a rolling speed of 120 rpm - 150 rpm and at room temperature, the cured binder is obtained.

[0037] In the actual implementation process, by subjecting the binder to a curing treatment, the molecular chain segments in the binder will have sufficient time and energy to move and recombine. Under the baking conditions, the silicon-oxygen bonds (Si-O) in the polymethylpolysiloxane molecules can undergo a cross-linking reaction. It is beneficial to cross-link and form a three-dimensional network structure on the substrate, significantly improving the mechanical strength of the paint film.

[0038] To solve the technical problems proposed by this application, this application also provides a spraying method for a high-performance ceramic coating, including the following steps:

[0039] Step 301. Preheating

[0040] Preheat the substrate to 45°C - 60°C;

[0041] Step 302. Primer spraying

[0042] Spray the prepared primer onto the substrate preheated in step 301;

[0043] Step 303. Topcoat spraying

[0044] Spray the prepared topcoat directly onto the primer sprayed in step 302;

[0045] Step 304. Baking

[0046] Transfer the substrate sprayed in steps 302 and 303 to a baking oven and bake for 20 min - 25 min under the conditions of 80°C - 280°C, then the spraying of a high-performance ceramic coating is completed.

[0047] In some feasible embodiments, in step 302, the spraying thickness of the primer is 15 μm - 30 μm; the spraying thickness of the topcoat is 5 μm - 10 μm.

[0048] In some feasible embodiments, step 304 includes a heating and baking section, a heat preservation and baking section, and a cooling section that are carried out in chronological order;

[0049] In the heating and baking section, the sprayed substrate is heated to 280°C at a heating rate of 40°C / min - 50°C / min;

[0050] In the heat preservation and baking section, the substrate is kept at 280°C for 15 min - 25 min;

[0051] In the cooling section, the substrate is cooled from 280°C to room temperature under natural conditions.

[0052] Compared with the prior art, the present application has the following beneficial effects:

[0053] The present application provides a high-performance ceramic coating, its preparation method and spraying method. The ceramic coating is composed of a binder, ceramic fillers, functional additives, color paste, and diluent. The ceramic fillers include silicon carbide and zirconia, and the mass ratio of the two is (4.8 - 5.5):3. By designing the components and proportions of the ceramic coating, the components play a synergistic role. The specific amount of the binder ensures good adhesion of the coating. Silicon carbide and zirconia in the ceramic fillers are combined in a specific ratio to improve the hardness and wear resistance of the coating. Appropriate addition of functional additives optimizes the comprehensive performance of the coating, the color paste ensures color stability, and the diluent ensures the workability of the coating. It has the advantages of high coating hardness, excellent wear resistance, strong film adhesion, long service life, being applicable to the kitchen technology field, and being convenient for popularization and implementation. Specific embodiments

[0054] The technical solution provided by the present application is further described in combination with specific embodiments. Example 1

[0055] (1) A preparation method of a high-performance ceramic coating includes the following steps:

[0056] Step 101. Preparation of the primer

[0057] According to the component table shown in Table 1, the binder, ceramic fillers, primer color paste, functional additives, and diluent are sequentially put into a high-speed disperser and dispersed for 15 min under the conditions of 850 rpm and 25°C to obtain the primer;

[0058] Step 102. Preparation of the topcoat

[0059] According to the preset target ratio, the binder, ceramic fillers, topcoat color paste, functional additives, and diluent are sequentially put into a high-speed disperser and dispersed for 15 min under the conditions of 850 rpm and 25°C to obtain the topcoat.

[0060] In Step 101 and Step 102, the binder and the color paste are subjected to a curing treatment, and the curing treatment includes the following steps:

[0061] Step 201. According to the component table shown in Table 1, put polymethylpolysiloxane and fumed silica into a high-speed disperser, disperse for 10 minutes at room temperature and 500 rpm, and then the binder to be cured is obtained;

[0062] Step 202. Divide the binder to be cured prepared in Step 201 into two equal parts, put one of them into a curing barrel, and cure for 4 hours at a rolling speed of 80 rpm and room temperature, and then the cured binder is obtained;

[0063] Step 203. Put the other part of the binder to be cured and the primer color paste / topcoat color paste into the curing barrel in sequence, and cure for 30 minutes at a rolling speed of 80 rpm and room temperature, and then the cured color paste is obtained.

[0064] (2) A spraying method for a high-performance ceramic coating includes the following steps:

[0065] Step 301. Preheat

[0066] Preheat the substrate to 45 °C;

[0067] Step 302. Primer spraying

[0068] Spray the prepared primer onto the substrate preheated in Step 301, and the spraying thickness of the primer is 15 μm;

[0069] Step 303. Topcoat spraying

[0070] Spray the prepared topcoat directly onto the primer sprayed in Step 302, and the spraying thickness of the topcoat is 5 μm;

[0071] Step 304. Baking

[0072] Transfer the substrate sprayed in Step 302 and Step 303 to a baking furnace, and carry out a heating baking section, an insulation baking section and a cooling section in sequence according to the time sequence;

[0073] The heating baking section is to heat the sprayed substrate to 280 °C at a heating rate of 40 °C / min;

[0074] The insulation baking section is to keep the substrate at 280 °C for 15 minutes;

[0075] The cooling section is to cool the substrate from 280 °C to room temperature under natural conditions.

[0076] In Steps 302 and 303, when spraying the primer or topcoat, the spray gun has a nozzle diameter of 1.0 mm, a spraying pressure of 0.2 MPa, and a distance of 25 cm between the spray gun and the substrate. Before spraying the primer or topcoat, the prepared primer or topcoat is filtered through a 150-mesh filter screen. Example 2

[0077] (1) A preparation method of a high-performance ceramic coating includes the following steps:

[0078] Step 101. Primer preparation

[0079] According to the component table shown in Table 1, the binder, ceramic filler, primer color paste, functional additive, and diluent are sequentially put into a high-speed disperser and dispersed for 18 min under the conditions of 1000 rpm and 30 °C to obtain the primer.

[0080] Step 102. Topcoat preparation

[0081] According to the preset target ratio, the binder, ceramic filler, topcoat color paste, functional additive, and diluent are sequentially put into a high-speed disperser and dispersed for 18 min under the conditions of 1000 rpm and 30 °C to obtain the topcoat.

[0082] In Steps 101 and 102, the binder and color paste are subjected to a curing treatment, and the curing treatment includes the following steps:

[0083] Step 201. According to the component table shown in Table 1, polymethylpolysiloxane and fumed silica are put into a high-speed disperser and dispersed for 10 min at room temperature and 550 rpm to obtain the binder to be cured.

[0084] Step 202. Divide the binder to be cured prepared in Step 201 into two equal parts, put one of the parts into a curing barrel, and cure it for 5 h at a rolling speed of 100 rpm and room temperature to obtain the cured binder.

[0085] Step 203. Put the other part of the binder to be cured and the primer color paste / topcoat color paste into the curing barrel in sequence, and cure it for 40 min at a rolling speed of 100 rpm and room temperature to obtain the cured color paste.

[0086] (2) A spraying method of a high-performance ceramic coating includes the following steps:

[0087] Step 301. Preheating

[0088] Preheat the substrate to 50 °C.

[0089] Step 302. Primer spraying

[0090] Spray the prepared primer onto the preheated substrate in step 301, with the primer spray thickness being 20 μm;

[0091] Step 303. Topcoat spraying

[0092] Directly spray the prepared topcoat onto the primer sprayed in step 302, with the topcoat spray thickness being 8 μm;

[0093] Step 304. Baking

[0094] Transfer the substrate sprayed in steps 302 and 303 to a baking furnace, and sequentially perform a heating baking section, a heat preservation baking section, and a cooling section in chronological order;

[0095] In the heating baking section, heat up the sprayed substrate to 280 °C at a heating rate of 45 °C / min;

[0096] In the heat preservation baking section, keep the substrate at 280 °C for 20 min;

[0097] In the cooling section, under natural conditions, cool the substrate from 280 °C to room temperature.

[0098] In steps 302 and 303, when spraying the primer or topcoat, the spray gun nozzle diameter is 1.0 mm, the spray pressure is 0.2 MPa, the distance between the spray gun and the substrate is 25 cm. Before spraying the primer or topcoat, filter the prepared primer or topcoat with a 150-mesh filter screen. Example 3

[0099] (1) A preparation method of a high-performance ceramic coating includes the following steps:

[0100] Step 101. Primer preparation

[0101] According to the component table shown in Table 1, sequentially put the binder, ceramic filler, primer color paste, functional additive, and diluent into a high-speed disperser, and disperse for 20 min under the conditions of 1250 rpm and 40 °C to obtain the primer;

[0102] Step 102. Topcoat preparation

[0103] According to the preset target ratio, sequentially put the binder, ceramic filler, topcoat color paste, functional additive, and diluent into a high-speed disperser, and disperse for 20 min under the conditions of 1250 rpm and 40 °C to obtain the topcoat.

[0104] In steps 101 and 102, the binder and the color paste are subjected to a curing treatment, and the curing treatment includes the following steps:

[0105] Step 201. According to the component table shown in Table 1, put polymethylpolysiloxane and fumed silica into a high-speed disperser, disperse for 10 minutes at room temperature and 600 rpm, and then the binder to be cured can be obtained.

[0106] Step 202. Divide the binder to be cured prepared in Step 201 into two equal parts, put one of them into a curing barrel, cure at a rolling speed of 120 rpm and room temperature for 6 hours, and then the cured binder can be obtained.

[0107] Step 203. Put the other part of the binder to be cured and the primer color paste / final coat color paste into the curing barrel in sequence, cure at a rolling speed of 120 rpm and room temperature for 50 minutes, and then the cured color paste can be obtained.

[0108] (2) A spraying method for a high-performance ceramic coating includes the following steps:

[0109] Step 301. Preheat

[0110] Preheat the substrate to 60 °C.

[0111] Step 302. Primer spraying

[0112] Spray the prepared primer onto the preheated substrate in Step 301, and the spraying thickness of the primer is 30 μm.

[0113] Step 303. Final coat spraying

[0114] Spray the prepared final coat directly onto the primer sprayed in Step 302, and the spraying thickness of the final coat is 10 μm.

[0115] Step 304. Baking

[0116] Transfer the substrate sprayed in Steps 302 and 303 to a baking furnace, and carry out a heating baking section, an insulation baking section and a cooling section in sequence according to the time sequence;

[0117] In the heating baking section, heat up the sprayed substrate to 280 °C at a heating rate of 50 °C / min;

[0118] In the insulation baking section, keep the substrate at 280 °C for 25 minutes;

[0119] In the cooling section, under natural conditions, cool the substrate from 280 °C to room temperature.

[0120] In Steps 302 and 303, when spraying the primer or the final coat, the gun nozzle diameter is 1.0 mm, the spraying pressure is 0.2 MPa, the distance between the gun and the substrate is 25 cm. Before spraying the primer or the final coat, filter the prepared primer or final coat with a 150-mesh filter screen.

[0121] Table 1 Component Parameter Table of Examples 1-3

[0122] Component / Parameter Example 1 Example 2 Example 3 Total Binder 45 parts 50 parts 55 parts Polymethylpolysiloxane 30.79 parts (mass ratio 6.5:3) 35.48 parts (mass ratio 7.35:3) 40.80 parts (mass ratio 8.2:3) Fumed Silica 14.21 parts 14.52 parts 14.20 parts Total Ceramic Filler 5 parts 7.5 parts 10 parts Silicon Carbide 3.08 parts (particle size 15μm, mass ratio 4.8:3) 4.74 parts (particle size 20.5μm, mass ratio 5.15:3) 6.47 parts (particle size 26μm, mass ratio 5.5:3) Zirconia 1.92 parts (particle size 25μm) 2.76 parts (particle size 30μm) 3.53 parts (particle size 35μm) Total Functional Additive 1 part 2 parts 3 parts Propylene Glycol Methyl Ether 0.33 parts (mass ratio 0.5:1) 0.92 parts (mass ratio 0.85:1) 1.64 parts (mass ratio 1.2:1) Dimethyl Silicone Oil 0.67 parts 1.08 parts 1.36 parts Color Paste 25 parts 30 parts 35 parts Total Diluent 8 parts 10 parts 12 parts Isopropyl Alcohol 4.67 parts (mass ratio 2.8:1:1) 6.04 parts (mass ratio 3.05:1:1) 7.51 parts (mass ratio 3.3:1:1) Cyclohexanone 1.67 parts 1.98 parts 2.26 parts Ethylene Glycol Monoethyl Ether 1.67 parts 1.98 parts 2.26 parts

[0123] The sand-free ceramic coatings prepared in Examples 1-3 were subjected to the following tests:

[0124] Test 1: Measure the total film thickness using a film thickness tester;

[0125] Test 2: Measure the film gloss using a glossmeter;

[0126] Test 3: Measure the pencil hardness of the film with reference to the provisions of GB / T 6739-2006;

[0127] Test 4: Measure the film adhesion grade with reference to the provisions of GB / T 1720-2020;

[0128] Test 5: Use a Scotch-Brite pad of model 3M744C to rub the film under a load of 4.5 kg, and record the number of rubbing times required to produce scratches to test the wear resistance of the film;

[0129] Test 6: Immerse the substrate with the film attached in salt water (5% NaCl) at 80 °C and boil continuously for 24 hours, 48 hours, and 72 hours. After the boiling immersion is completed, take out the substrate and check the overall film to test the salt water resistance of the film;

[0130] Test 7: Immerse the substrate with the film attached in glacial acetic acid (5%) and boil continuously for 24 hours, 48 hours, and 72 hours. After the boiling immersion is completed, take out the substrate and check the overall film to test the glacial acetic acid resistance of the film;

[0131] Test 8: Immerse the substrate with the film attached in sodium carbonate (5%) at room temperature for 24 hours, 48 hours, and 72 hours. After the immersion is completed, take out the substrate and check the overall film to test the alkali resistance of the film;

[0132] Test 9: Place the substrate with the film attached in a dishwasher, start the dishwasher, take out the substrate from the dishwasher every 5 hours, and check the overall condition of the film on the substrate. If there is no obvious abnormality in the film, put the substrate back into the dishwasher and continue to start the dishwasher until the film shows an abnormality;

[0133] Test 10: Place the substrate with the film attached in a baking oven with a heating temperature of 400 °C and heat for 24 hours. After the heating is completed, take out the substrate and check the overall condition of the film to test the heat resistance of the film.

[0134] During the testing process, the ceramic coatings prepared in Examples 1-3 were all sprayed on aluminum alloy substrates of the same specification.

[0135] The aluminum alloy substrates were all treated by brown fused alumina sandblasting with 60-80 mesh. After sandblasting, the surface Ra of the aluminum alloy substrates was 2.5 μm - 4.0 μm. The test results are shown in Table 2 below.

[0136] Table 2 Test Results of Examples 1-3

[0137] Test Items Example 1 Example 2 Example 3 Total Film Thickness (μm) 20μm 28μm 40μm Glossiness (°) 38° 42° 39° Pencil Hardness 9H 9H 9H Adhesion Grade Grade 0 Grade 0 Grade 0 Abrasion Resistance (times) 5899 6004 5973 Salt Water Resistance (5% NaCl, 24h) No Abnormality No Abnormality No Abnormality Salt Water Resistance (5% NaCl, 48h) No Abnormality No Abnormality No Abnormality Salt Water Resistance (5% NaCl, 72h) No Abnormality No Abnormality No Abnormality Acid Resistance (5% Glacial Acetic Acid, 24h) No Abnormality No Abnormality No Abnormality Acid Resistance (5% Glacial Acetic Acid, 48h) No Abnormality No Abnormality No Abnormality Acid Resistance (5% Glacial Acetic Acid, 72h) No Abnormality No Abnormality No Abnormality Alkali Resistance (5% Sodium Carbonate, 24h) No Abnormality No Abnormality No Abnormality Alkali Resistance (5% Sodium Carbonate, 48h) No Abnormality No Abnormality No Abnormality Alkali Resistance (5% Sodium Carbonate, 72h) No Abnormality No Abnormality No Abnormality Dishwasher Test No Abnormality No Abnormality No Abnormality Heat Resistance Test No Abnormality No Abnormality No Abnormality

[0138] As can be seen from the test results in Table 2, the present application provides a high-performance ceramic coating, its preparation method and spraying method. The ceramic coating is composed of a binder, ceramic fillers, functional additives, color paste, and diluent. The ceramic fillers include silicon carbide and zirconia, and the mass ratio of the two is (4.8 - 5.5):3. By adjusting the ratio of polymethylpolysiloxane and fumed silica in the binder, the crosslinking density of the coating can be effectively improved, and a uniform organic-inorganic hybrid network can be formed on the substrate surface, significantly improving the density and heat resistance of the coating; by adjusting the ratio of silicon carbide and zirconia in the ceramic fillers, a uniform reinforcing skeleton can be formed in the coating, significantly improving the hardness, wear resistance, acid resistance, salt resistance, and alkali resistance of the coating; by adjusting the ratio of propylene glycol methyl ether and dimethyl silicone oil in the functional additives, the wettability of each component in the coating can be effectively improved, significantly reducing the porosity of the coating, and significantly improving the interfacial bonding ability between the coating and the substrate; by adjusting the ratio of isopropanol, cyclohexanone, and ethylene glycol monoethyl ether in the diluent and setting the evaporation gradient of the diluent, the porosity of the coating can be further reduced, and the gloss of the paint film can be improved. It has the advantages of high coating hardness, excellent wear resistance, strong paint film adhesion, long service life, being applicable to the kitchen technology field, and being convenient for popularization and implementation.

[0139] The above has introduced the embodiments provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A high-performance ceramic coating, characterized in that It consists of the following components by weight parts: Binder: 45 parts - 55 parts Ceramic filler: 5 parts - 10 parts Functional additive: 1 part - 3 parts Color paste: 25 parts - 35 parts Diluent: 8 parts - 12 parts; Among them, the ceramic filler includes silicon carbide and zirconia; Among them, the mass ratio of the silicon carbide to the zirconia is (4.8 - 5.5):

3.

2. A high-performance ceramic coating according to claim 1, wherein the particle size range of the silicon carbide is 15μm - 26μm; the particle size range of the zirconia is 25μm - 35μm.

3. A high-performance ceramic coating according to claim 1, wherein the binder includes polymethylpolysiloxane and fumed silica; Among them, the mass ratio of the polymethylpolysiloxane to the fumed silica is (6.5 - 8.2):

3.

4. A high-performance ceramic coating according to claim 1, wherein the functional additive includes propylene glycol methyl ether and dimethyl silicone oil; Among them, the mass ratio of the propylene glycol methyl ether to the dimethyl silicone oil is (0.5 - 1.2):

1.

5. A high-performance ceramic coating according to claim 1, wherein the diluent includes isopropyl alcohol, cyclohexanone and ethylene glycol monoethyl ether; Among them, the mass ratio of the isopropyl alcohol, the cyclohexanone and the ethylene glycol monoethyl ether is (2.8 - 3.3):1:

1.

6. The preparation method of a high-performance ceramic coating according to any one of claims 1-5, characterized in that, It includes the following steps: Step 101. Primer preparation According to the preset target ratio, the binder, ceramic filler, primer color paste, functional additive and diluent are sequentially put into a high-speed disperser, and after dispersing for 15 min - 20 min under the conditions of 850 rpm - 1250 rpm and 25°C - 40°C, the primer is obtained; Step 102. Topcoat preparation According to the preset target ratio, the binder, ceramic filler, topcoat color paste, functional additive and diluent are sequentially put into a high-speed disperser, and after dispersing for 15 min - 20 min under the conditions of 850 rpm - 1250 rpm and 25°C - 40°C, the topcoat is obtained.

7. The preparation method of a high-performance ceramic coating according to claim 6, characterized in that, In Step 101 and Step 102, the binder has been subjected to a curing treatment; The curing treatment includes the following steps: Step 201: According to the preset target ratio, the polymethylpolysiloxane and fumed silica are sequentially put into a curing barrel, and after curing for 4 h - 6 h under the conditions of a rolling speed of 120 rpm - 150 rpm and room temperature, the cured binder is obtained.

8. A spraying method of a high-performance ceramic coating according to any one of claims 1-5, characterized in that, It includes the following steps: Step 301. Preheating Preheat the substrate to 45°C - 60°C; Step 302. Primer spraying Spray the prepared primer onto the substrate preheated in Step 301; Step 303. Topcoat spraying Spray the prepared topcoat directly onto the primer sprayed in Step 302; Step 304. Baking Transfer the substrate sprayed in Step 302 and Step 303 to a baking furnace, and after baking for 20 min - 25 min under the conditions of 80°C - 280°C, the spraying of a high-performance ceramic coating is completed.

9. The spraying method of a high-performance ceramic coating according to claim 8, characterized in that, In Step 302, the spraying thickness of the primer is 15μm - 30μm; the spraying thickness of the topcoat is 5μm - 10μm.

10. A spraying method of a high-performance ceramic coating according to claim 8, characterized in that, Step 304 includes a temperature-rising baking stage, a heat-preserving baking stage, and a temperature-lowering stage that are carried out sequentially in chronological order; In the temperature-rising baking stage, the substrate after spraying is heated to 280°C at a temperature-rising rate of 40°C / min - 50°C / min; In the heat-preserving baking stage, the substrate is heat-preserved at 280°C for 15 min - 25 min; In the temperature-lowering stage, the substrate is cooled from 280°C to room temperature under natural conditions.