Preparation method of self-cleaning raw ceramic glaze with micro-nano structure rough surface construction

Abstract

The present invention relates to a method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface. The glaze raw materials are composed of the following weight percentages: kaolin 5.47-6.69%, albite 24.95-28.74%, potassium feldspar 24.86-28.82%, quartz 1.17-8.97%, calcite 1.83-9.84%, talc 2.55-3.05%, colemanite 14.49-27.26%, and titanium dioxide 6.15-7.08%. The self-cleaning raw ceramic glaze is obtained by batching, homogenizing, ball milling, screening, and aging according to the glaze formula. The present invention uses inexpensive mineral raw materials and utilizes the principle of high-temperature phase separation to generate uniformly sized, closely spaced phase-separated droplets in the glaze to construct a micro-nanoscale rough surface, thereby achieving super-hydrophilic self-cleaning properties on the glaze's macroscopic surface. Therefore, the industrialization prospect is broad.

Description

Technical Field

[0001] The invention relates to the technical field of building sanitary ceramics, in particular to a method for preparing a self-cleaning raw ceramic glaze with a micro-nano structured rough surface. Background Art

[0002] The surface properties of ceramic materials, particularly their hydrophilicity, are crucial for imparting self-cleaning properties to ceramic surfaces. Hydrophilicity is typically achieved through physical or chemical methods. A unique microscopic surface roughness is the primary driver of this hydrophilicity. This allows for a low water contact angle, enhancing the attraction between water molecules and the surface, thereby preventing contaminants from adhering to the surface. This allows for self-cleaning of contaminants under the influence of water flow, without requiring any external interaction. The industrial application of self-cleaning technology primarily achieves this by achieving a low contact angle on the surface. To date, research results both domestically and internationally have shown that technologies capable of achieving self-cleaning effects on ceramic surfaces primarily include: super-hydrophilic coatings, surface construction with specialized roughness structures, nano-semiconductor photocatalysis, and ultra-smooth self-cleaning glazes. However, these approaches suffer from complex processes, high production costs, demanding production equipment requirements, and limited durability and lifespan, making them difficult to scale up and apply. The coating process for the super-hydrophilic self-cleaning glaze in Patent ZL202110859978.3 is complex and leads to high production costs. Furthermore, the coating is synthesized at 800°C to 900°C, resulting in poor wear resistance and a short service life. The preparation of the super-hydrophilic self-cleaning glaze in Patents ZL202010117271.0 and ZL202110709000.9 requires the introduction of a surfactant containing the metastable CaTi2O5 phase, which requires artificial synthesis and has relatively high production costs. The super-hydrophilic self-cleaning glaze in Patents ZL202311276527.2 and ZL202311276526.8 requires the use of 80-90% frit in the formulation, a complex frit method with high production costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a self-cleaning raw ceramic glaze with a micro-nano structured rough surface structure, which has simple process, low cost and excellent quality.

[0004] The technical solution of the present invention is: a method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface structure, characterized in that the glaze raw materials are composed of the following formula in percentage by weight: 5.47-6.69% kaolin, 24.95-28.74% albite, 24.86-28.82% potassium feldspar, 1.17-8.97% quartz, 1.83-9.84% calcite, 2.55-3.05% talc, 14.49-27.26% colemanite, and 6.15-7.08% titanium dioxide; and the self-cleaning raw ceramic glaze is obtained by carrying out the steps of batching, homogenizing, ball milling, screening, and aging according to the glaze formula.

[0005] The colemanite and titanium dioxide are self-cleaning modifiers.

[0006] The homogenization process comprises placing the ingredients, alumina ball mill and anhydrous ethanol into a ball mill and ball milling for 10 to 20 minutes, passing the slurry through a 120-mesh sieve and drying it in an oven, and passing the powder through a 120-mesh sieve after drying to obtain a glaze precursor.

[0007] The weight ratio of the ingredients in the homogenization process: alumina ball mill: anhydrous ethanol is 1:2-2.5:1-1.2, and the ball milling speed of the ball mill is 1400 r / min.

[0008] The ball milling process comprises the following steps: milling the glaze precursor, alumina ball mill, and water in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes according to a weight ratio of 1: 2-2.5: 0.6-0.8, and adding a diluent to adjust the specific gravity of the glaze slurry.

[0009] 60wt% of the alumina ball mills are ball mills with a diameter of 10-12mm, and 40wt% are ball mills with a diameter of 4-6mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.60-1.70.

[0010] The added amounts of CMC and fairy water are 0.1% and 0.05% of the glaze slurry weight respectively.

[0011] The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.03-0.06%; the aging process takes 12-24 hours.

[0012] The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln in an oxidizing atmosphere, heated to 1190-1210° C. at a rate of 3° C. / min, kept warm for 15-45 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

[0013] The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 150 to 250 nm in size and uniform distribution, a glaze surface roughness of 35.4 to 61.6 nm, a wetting angle of 7.685 to 8.465°, a glaze surface whiteness of 80.29 to 84.5%, and a glaze surface hardness of 726.67 to 786.48 kgf·mm -2 .

[0014] After the micro-nano super-hydrophilic self-cleaning ceramic glaze is contaminated by oily pen grinding, a small amount of water can be added to desorb the contaminants and the glaze can be washed with a small amount of water to restore its clean surface.

[0015] The present invention has the following beneficial effects:

[0016] (1) The present invention adds self-cleaning agents (boronite and titanium dioxide) to the glaze formula, optimizes the process design, and prepares the glaze precursor through a homogenization process. This not only significantly improves the uniformity of the raw material particles, but also reduces the particle size to the micro-nano level, thereby ensuring that nano-level phase-separated droplets of uniform size and distribution are formed in the glaze, constructing a micro-nano rough surface on the glaze surface, making the glaze surface super-hydrophilic and achieving a self-cleaning effect on the glaze surface. This process also allows the in-situ precipitation of CaTi(SiO5) microcrystals at high temperatures. This is due to the decomposition of CaCO3 into CaO at high temperatures, which reacts with TiO2 and SiO2 to form titanotite (CaTi(SiO5)). The nucleation and growth of these crystals are driven by the pervasive phase separation behavior within the glaze (the energy released by the generation of a second phase). These CaTi(SiO5) microcrystals are present throughout the glaze layer and on the surface, significantly increasing the hardness of the glaze. Titanium-based microcrystals possess intrinsic photohydrophilicity, which enhances the glaze's hydrophilicity under illumination, further improving its hydrophilicity and long-term self-cleaning properties. The resulting glaze maintains its self-cleaning properties after repeated use. The resulting glaze is highly stable, boasts a dense, hard, and wear-resistant glaze layer, and is suitable for a variety of ceramic bodies. This contributes to the upgrading of the ceramics industry and significantly promotes technological advancement and application development in the building and sanitary ceramics industry.

[0017] (2) The raw materials used in the super-hydrophilic self-cleaning ceramic glaze of the present invention are all simple mineral raw materials. The raw material glaze is simply fired once to obtain a glaze with excellent self-cleaning performance. The hardness and whiteness of the glaze are comparable to those of full-frit glaze. The preparation method is simple, the cost is low, and the wear resistance is good. It is easier to realize industrial production and will have broad application prospects in the building sanitary ceramics industry.

[0018] (3) Compared with super-hydrophilic self-cleaning coatings, the present invention has a simpler preparation process, lower production equipment requirements, and lower production costs. The glaze has good bonding with the ceramic body, ensuring the surface wear resistance and service life. Compared with self-cleaning full-frit glaze, the present invention avoids the complex preparation process and high energy consumption of frits, making it have broad prospects for practical application in ceramic production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a water contact angle test diagram of the super hydrophilic self-cleaning ceramic glaze prepared in Example 1;

[0020] Figure 2 This is a self-cleaning effect diagram of the super hydrophilic self-cleaning ceramic glaze obtained in Example 1;

[0021] Figure 3 This is a SEM photo of the super hydrophilic self-cleaning ceramic glaze prepared in Example 1;

[0022] Figure 4 This is an AFM photograph of the super hydrophilic self-cleaning ceramic glaze prepared in Example 1. DETAILED DESCRIPTION

[0023] In order to further illustrate the present invention and the technical means and effects adopted to achieve the predetermined purpose of the invention, the present invention is described in detail below in conjunction with preferred embodiments.

[0024] Example 1

[0025] A method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface structure is characterized in that the glaze raw materials are composed according to the following formula in percentage by weight: 5.47% kaolin, 24.95% albite, 24.86% potassium feldspar, 8.97% quartz, 1.83% calcite, 2.55% talc, 25.22% colemanite, and 6.15% titanium dioxide; and the self-cleaning raw ceramic glaze is obtained by carrying out the steps of batching, homogenizing, ball milling, screening, and aging according to the glaze formula.

[0026] The colemanite and titanium dioxide are self-cleaning modifiers.

[0027] The homogenization process comprises placing the ingredients, alumina ball mill and anhydrous ethanol into a ball mill and ball milling for 15 minutes. After ball milling, the slurry is passed through a 120-mesh sieve and placed in an oven for drying. After drying, the powder is passed through a 120-mesh sieve to obtain a glaze precursor.

[0028] The weight ratio of the ingredients: alumina ball mill: anhydrous ethanol is 1:2.5:1, and the ball milling speed of the ball mill is 1400 r / min.

[0029] The ball milling process comprises the following steps: milling the glaze precursor, alumina ball mill, and water in a ratio of 1:2:0.6 by weight in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes, and adding a diluent to adjust the specific gravity of the glaze slurry.

[0030] 60 wt% of the alumina ball mills are ball mills with a diameter of 12 mm, and 40 wt% are ball mills with a diameter of 6 mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.60.

[0031] The added amounts of CMC and fairy water are 0.1% and 0.05% respectively.

[0032] The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.03%; the aging process takes 12 hours.

[0033] The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln in an oxidizing atmosphere, heated to 1200° C. at a rate of 3° C. / min, kept warm for 30 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

[0034] The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 200 nm in size and uniform distribution, a glaze surface roughness of 38.3 nm, a wetting angle of 7.685°, a glaze surface whiteness of 84.5%, and a glaze surface hardness of 748.7 kgf·mm. -2 .

[0035] After the micro-nano super-hydrophilic self-cleaning ceramic glaze is contaminated by oily pen grinding, a small amount of water can be added to desorb the contaminants and the glaze can be washed with a small amount of water to restore its clean surface.

[0036] like Figure 1 As shown, the water contact angle of the prepared super hydrophilic self-cleaning ceramic glaze is 7.685°, which has good super hydrophilicity. The glaze has a strong attraction to water molecules, which is the basis for the glaze to have a self-cleaning effect.

[0037] like Figure 2 As shown, when the prepared super hydrophilic self-cleaning ceramic glaze comes into contact with water, the oily ink immediately floats off, and it can be immediately restored to cleanliness after being rinsed with a small amount of water.

[0038] like Figure 3 As shown, the prepared super-hydrophilic self-cleaning ceramic glaze was observed under a transmission electron microscope at a magnification of 10,000 times, and it was found that there were a large number of phase-separated droplets of different sizes and uniform distribution in the glaze. The droplet size was about 200nm, which is the basis for constructing a micro-nano rough structure with super-hydrophilic properties.

[0039] like Figure 4As shown in the figure, the prepared super-hydrophilic self-cleaning ceramic glaze has a small roughness of Ra = 38.3 nm, which is conducive to the smooth spreading of water molecules on the glaze surface.

[0040] Example 2

[0041] A method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface structure is characterized in that the glaze raw materials are composed according to the following formula in percentage by weight: 6.08% kaolin, 27.37% albite, 26.43% potassium feldspar, 1.51% quartz, 2.09% calcite, 2.60% talc, 27.26% colemanite, and 6.66% titanium dioxide; and the self-cleaning raw ceramic glaze is obtained by carrying out the steps of batching, homogenizing, ball milling, screening, and aging according to the glaze formula.

[0042] The colemanite and titanium dioxide are self-cleaning modifiers.

[0043] The homogenization process comprises placing the ingredients, alumina ball mill and anhydrous ethanol into a ball mill and ball milling for 15 minutes. After ball milling, the slurry is passed through a 120-mesh sieve and placed in an oven for drying. After drying, the powder is passed through a 120-mesh sieve to obtain a glaze precursor.

[0044] The weight ratio of the ingredients: alumina ball mill: anhydrous ethanol is 1:2.5:1, and the ball milling speed of the ball mill is 1400 r / min.

[0045] The ball milling process comprises the following steps: milling the glaze precursor, alumina ball mill, and water in a ratio of 1:2:0.6 by weight in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes, and adding a diluent to adjust the specific gravity of the glaze slurry.

[0046] 60 wt% of the alumina ball mills are ball mills with a diameter of 10 mm, and 40 wt% are ball mills with a diameter of 4 mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.62.

[0047] The added amounts of CMC and fairy water are 0.1% and 0.05% respectively.

[0048] The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.06%; the aging process takes 12 hours.

[0049] The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln under an oxidizing atmosphere, heated to 1210° C. at a rate of 3° C. / min, kept warm for 30 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

[0050] The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 250 nm in size and uniform distribution, a glaze surface roughness of 44.1 nm, a wetting angle of 8.25°, a glaze surface whiteness of 81.82%, and a glaze surface hardness of 739.4 kgf·mm. -2 .

[0051] After the micro-nano super-hydrophilic self-cleaning ceramic glaze is contaminated by oily pen grinding, a small amount of water can be added to desorb the contaminants and the glaze can be washed with a small amount of water to restore its clean surface.

[0052] Example 3

[0053] A method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface structure is characterized in that the glaze raw materials are composed of the following formula in percentage by weight: 6.69% kaolin, 28.65% albite, 28.64% potassium feldspar, 1.56% quartz, 9.84% calcite, 3.05% talc, 14.49% colemanite, and 7.08% titanium dioxide; and the self-cleaning raw ceramic glaze is obtained by carrying out the steps of batching, homogenizing, ball milling, screening, and aging according to the glaze formula.

[0054] The colemanite and titanium dioxide are self-cleaning modifiers.

[0055] The homogenization process comprises placing the ingredients, alumina ball mill and anhydrous ethanol into a ball mill and ball milling for 20 minutes, passing the slurry through a 120-mesh sieve and drying it in an oven, and passing the powder through a 120-mesh sieve after drying to obtain a glaze precursor.

[0056] The weight ratio of the ingredients: alumina ball mill: anhydrous ethanol is 1:2.5:1.2, and the ball milling speed of the ball mill is 1400 r / min.

[0057] The ball milling process comprises the following steps: milling the glaze precursor, alumina ball mill, and water in a ratio of 1:2:0.8 by weight in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes, and adding a diluent to adjust the specific gravity of the glaze slurry.

[0058] 60 wt% of the alumina ball mills are ball mills with a diameter of 11 mm, and 40 wt% are ball mills with a diameter of 4 mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.67.

[0059] The added amounts of CMC and fairy water are 0.1% and 0.05% respectively.

[0060] The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.06%; the aging process takes 24 hours.

[0061] The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln under an oxidizing atmosphere, heated to 1190° C. at a rate of 3° C. / min, kept warm for 45 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

[0062] The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 250 nm in size and uniform distribution, a glaze surface roughness of 58.4 nm, a wetting angle of 8.236°, a glaze surface whiteness of 81.29%, and a glaze surface hardness of 726.67 kgf·mm. -2 .

[0063] After the micro-nano super-hydrophilic self-cleaning ceramic glaze is contaminated by oily pen grinding, a small amount of water can be added to desorb the contaminants and the glaze can be washed with a small amount of water to restore its clean surface.

[0064] Example 4

[0065] A method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface structure is characterized in that the glaze raw materials are composed of the following formula in percentage by weight: 6.69% kaolin, 28.68% albite, 28.82% potassium feldspar, 1.68% quartz, 7.22% calcite, 3.05% talc, 16.93% colemanite, and 6.93% titanium dioxide; and the self-cleaning raw ceramic glaze is obtained by carrying out the steps of batching, homogenizing, ball milling, screening, and aging according to the glaze formula.

[0066] The colemanite and titanium dioxide are self-cleaning modifiers.

[0067] The homogenization process comprises placing the ingredients, alumina ball mill and anhydrous ethanol into a ball mill and ball milling for 20 minutes, passing the slurry through a 120-mesh sieve and drying it in an oven, and passing the powder through a 120-mesh sieve after drying to obtain a glaze precursor.

[0068] The weight ratio of the ingredients: alumina ball mill: anhydrous ethanol is 1:2.3:1.2, and the ball milling speed of the ball mill is 1400 r / min.

[0069] The ball milling process comprises the following steps: milling the glaze precursor, alumina ball mill, and water in a ratio of 1: 2.5: 0.8 by weight in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes, and adding a diluent to adjust the specific gravity of the glaze slurry.

[0070] 60 wt% of the alumina ball mills are ball mills with a diameter of 12 mm, and 40 wt% are ball mills with a diameter of 5 mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.67.

[0071] The added amounts of CMC and fairy water are 0.1% and 0.05% respectively.

[0072] The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.04%; the aging process takes 24 hours.

[0073] The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln under an oxidizing atmosphere, heated to 1190° C. at a rate of 3° C. / min, kept warm for 45 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

[0074] The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 250 nm in size and uniform distribution, a glaze surface roughness of 61.6 nm, a wetting angle of 8.465°, a glaze surface whiteness of 82.05%, and a glaze surface hardness of 735.96 kgf·mm. -2 .

[0075] After the micro-nano super-hydrophilic self-cleaning ceramic glaze is contaminated by oily pen grinding, a small amount of water can be added to desorb the contaminants and the glaze can be washed with a small amount of water to restore its clean surface.

[0076] Example 5

[0077] A method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface structure is characterized in that the glaze raw materials are composed of the following formula in percentage by weight: 5.93% kaolin, 28.74% albite, 26.88% potassium feldspar, 1.17% quartz, 4.60% calcite, 2.69% talc, 23.19% colemanite, and 6.80% titanium dioxide; and the self-cleaning raw ceramic glaze is obtained by carrying out the steps of batching, homogenizing, ball milling, screening, and aging according to the glaze formula.

[0078] The colemanite and titanium dioxide are self-cleaning modifiers.

[0079] The homogenization process comprises placing the ingredients, alumina ball mill and anhydrous ethanol into a ball mill and ball milling for 10 minutes. After ball milling, the slurry is passed through a 120-mesh sieve and placed in an oven for drying. After drying, the powder is passed through a 120-mesh sieve to obtain a glaze precursor.

[0080] The weight ratio of the ingredients: alumina ball mill: anhydrous ethanol is 1:2:1.1, and the ball milling speed of the ball mill is 1400 r / min.

[0081] The ball milling process comprises the following steps: milling the glaze precursor, alumina ball mill, and water in a ratio of 1: 2.2: 0.7 by weight in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes, and adding a diluent to adjust the specific gravity of the glaze slurry.

[0082] 60 wt% of the alumina ball mills are ball mills with a diameter of 11 mm, and 40 wt% are ball mills with a diameter of 5 mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.70.

[0083] The added amounts of CMC and fairy water are 0.1% and 0.05% respectively.

[0084] The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.05%; the aging process takes 20 hours.

[0085] The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln under an oxidizing atmosphere, heated to 1190° C. at a rate of 3° C. / min, kept warm for 15 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

[0086] The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 150 nm in size and uniform distribution, a glaze surface roughness of 35.4 nm, a wetting angle of 8.025°, a glaze surface whiteness of 80.29%, and a glaze surface hardness of 786.48 kgf·mm. -2 .

[0087] After the micro-nano super-hydrophilic self-cleaning ceramic glaze is contaminated by oily pen grinding, a small amount of water can be added to desorb the contaminants and the glaze can be washed with a small amount of water to restore its clean surface.

Claims

1. A method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface, characterized by: The glaze raw materials are composed of the following formula in percentage by weight: 5.47-6.69% kaolin, 24.95-28.74% albite, 24.86-28.82% potassium feldspar, 1.17-8.97% quartz, 1.83-9.84% calcite, 2.55-3.05% talc, 14.49-27.26% colemanite, and 6.15-7.08% titanium dioxide; the self-cleaning raw ceramic glaze is obtained by carrying out the following steps: batching, homogenizing, ball milling, screening, and aging according to the glaze formula; The colemanite and titanium dioxide are self-cleaning modifiers; The homogenization process comprises placing the ingredients, alumina ball mill, and anhydrous ethanol into a ball mill and milling for 10 to 20 minutes, passing the milled slurry through a 120-mesh sieve, and drying it in an oven. After drying, the powder is passed through a 120-mesh sieve to obtain a glaze precursor. The weight ratio of the ingredients: alumina ball mill: anhydrous ethanol is 1:2-2.5:1-1.2, and the ball milling speed of the ball mill is 1400 r / min.

2. The preparation method according to claim 1, wherein: The ball milling process comprises the following steps: milling the glaze precursor obtained in the homogenization process at a weight ratio of 1:2-2.5:0.6-0.8 in a high-speed ball mill at a rotation speed of 1400 r / min for 10 minutes, and adding a diluent to adjust the specific gravity of the glaze slurry.

3. The preparation method according to claim 2, wherein: 60wt% of the alumina ball mills are ball mills with a diameter of 10-12mm, and 40wt% are ball mills with a diameter of 4-6mm; the diluents are CMC and fairy water; and the specific gravity of the glaze slurry is 1.60-1.

70.

4. The preparation method according to claim 3, wherein: The added amounts of CMC and fairy water are 0.1% and 0.05% of the glaze slurry weight respectively.

5. The preparation method according to claim 1, wherein: The screening process is to pass through a 325-mesh sieve with a sieve residue of 0.03-0.06%; the aging process takes 12-24 hours.

6. The preparation method according to claim 1, wherein: The self-cleaning raw ceramic glaze is applied on the surface of the green body, dried, placed in a kiln in an oxidizing atmosphere, heated to 1190-1210° C. at a rate of 3° C. / min, kept warm for 15-45 minutes, and then naturally cooled to obtain a micro-nano super-hydrophilic self-cleaning ceramic glaze surface.

7. The preparation method according to claim 6, characterized in that: The micro-nano super-hydrophilic self-cleaning ceramic glaze has phase-separated droplets of 150 to 250 nm in size and uniform distribution, a glaze surface roughness of 35.4 to 61.6 nm, a wetting angle of 7.685 to 8.465°, a glaze surface whiteness of 80.29 to 84.5%, and a glaze surface hardness of 726.67 to 786.48 kgf·mm -2 .

Images