Preparation method of antibacterial ceramic tile and antibacterial ceramic tile

Abstract

The application provides an antibacterial ceramic tile preparation method and antibacterial ceramic tile, and the method comprises the following steps: preparing ceramic powder, wherein the ceramic powder comprises the following components: high-sodium feldspar 9-16%, calcined talc 3-8%, corundum powder 5-12%, silicon powder 2-6%, boron oxide 2-6%, calcined clay 0-4%, and ceramic glaze powder 30-80%; applying a specific underglaze to form an underglaze base layer, wherein the specific underglaze is obtained by adding the ceramic powder into the underglaze; forming a pattern decoration layer on the surface of the underglaze base layer, applying dry particles to form a dry particle layer, drying the dry particle layer, applying a specific hot melt plastic sealing glaze, putting into a kiln to be fired, and obtaining the antibacterial ceramic tile, wherein the specific hot melt plastic sealing glaze is obtained by adding the ceramic powder into the hot melt plastic sealing glaze. According to the application, the ceramic powder capable of generating far infrared waves is added into the underglaze and the specific hot melt plastic sealing glaze, so that the stability and durability of the product performance are not affected even if the face glaze is abraded, and the stable and efficient antibacterial performance can be maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to a preparation method of an antibacterial ceramic tile and the antibacterial ceramic tile. Background Art

[0002] As a primary material for home decoration, the antimicrobial properties of architectural ceramic tiles are increasingly becoming a key consideration for consumers. In the home, these tiles can be used on floors and walls in kitchens, bathrooms, bedrooms, and living rooms. In the medical sector, they can be found in public areas such as hospital operating rooms, wards, corridors, and restrooms. In the public sector, they can be found in crowded places like kindergarten and school cafeterias, classrooms, dormitories, restrooms, and infirmaries. In the commercial and office sector, they can be found in supermarkets, shopping malls, hotels, restaurants, pantries, and frequently used meeting rooms, restrooms, and reception rooms. The demand for antimicrobial architectural ceramic tiles in modern home decoration is steadily increasing.

[0003] However, the existing antibacterial ceramic tiles have poor antibacterial durability. During long-term use, they are unable to maintain stable and efficient antibacterial properties after repeated scrubbing and wiping.

[0004] Therefore, the existing technology has defects and needs to be improved and developed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for preparing antibacterial ceramic tiles and antibacterial ceramic tiles in response to the above-mentioned defects of the prior art, aiming to solve the problem that the antibacterial ceramic tiles in the prior art have poor antibacterial durability and cannot maintain stable and efficient antibacterial performance after repeated grinding, washing and wiping during long-term use.

[0006] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0007] The first embodiment of the present application provides a method for preparing an antibacterial ceramic tile, wherein the method for preparing the antibacterial ceramic tile comprises:

[0008] Prepare ceramic powder, wherein the raw materials of the ceramic powder include, by mass percentage, 9-16% of high sodium feldspar, 3-8% of calcined talc, 5-12% of corundum powder, 2-6% of silica powder, 2-6% of boron oxide, 0-4% of calcined clay, and 30-80% of ceramic glaze powder;

[0009] Applying a pre-prepared specific ground glaze to the surface of the ceramic body to be treated to form a ground glaze base layer, wherein the specific ground glaze is obtained by adding the ceramic powder to the ground glaze;

[0010] inkjet a decorative pattern on the surface of the base glaze substrate to form a pattern decoration layer, apply dry particles on the pattern decoration layer to form a dry particle layer, and dry the dry particle layer;

[0011] After applying the prepared special hot-melt sealing glaze on the dry granular layer to obtain a hot-melt sealing layer, and then firing in a kiln, an antibacterial ceramic tile is obtained, wherein the special hot-melt sealing glaze is obtained by adding the ceramic powder into the hot-melt sealing glaze.

[0012] In an implementation manner of the present application, the chemical components of the ceramic powder include, in percentage by mass:

[0013] Na2O 1.5-3%, MgO 1-3.5%, Al2O3 40-55%, SiO2 37-44%, B2O3 2-8%, La2O3 0.4-1.5%.

[0014] In an implementation manner of the present application, the chemical components of the ceramic glaze powder include, in percentage by mass:

[0015] Loss on ignition 0.6-0.82%, Al2O3 56-59%, SiO2 32-35%, Fe2O3 0.02-0.03%, CaO 0.2-0.35%, MgO 0-0.1%, K2O 1-2%, Na2O 1-2%, BaO 0-0.02%, La2O3 1.5-2%.

[0016] In an implementation manner of the present application, the preparation method of the ceramic powder includes:

[0017] The high-sodium feldspar 25-31%, the calcined talc 11-15%, the corundum powder 20-24%, the silicon micro powder 11-18%, the boron oxide 4-12%, and the calcined clay 6-8% are mixed and fired to prepare a pre-fired formula material;

[0018] The pre-fired formula material is ground to obtain a pre-fired powder;

[0019] The pre-fired powder and the ceramic glaze powder are mixed and calcined to obtain a calcined material;

[0020] The calcined material is ground to obtain the ceramic powder.

[0021] In an implementation manner of the present application, the chemical components of the pre-fired powder include, in percentage by mass:

[0022] Na2O 2.5-4%, MgO 3-5%, Al2O3 26-34%, SiO2 38-54%, B2O3 3.5-12%.

[0023] In one implementation of the present application, 25-31% of high sodium feldspar, 11-15% of calcined talc, 20-24% of corundum powder, 11-18% of silica powder, 4-12% of boron oxide, and 6-8% of calcined clay are mixed and fired, and before preparing the pre-fired formula, the following steps are further included:

[0024] The corundum powder and the silicon micropowder are crushed and ground so that the D50 of the corundum powder and the silicon micropowder is controlled within 1 to 3 μm.

[0025] In one implementation of the present application, the raw materials of the hot melt plastic sealing glaze include, by weight percentage:

[0026] Corundum powder 2-3%, ball clay 1-2%, washed kaolin 2-5%, quartz powder 0-3%, glass powder 65-85%, frit powder 15-24%.

[0027] In one implementation of the present application, the chemical components of the hot melt plastic sealing glaze include, by weight percentage:

[0028] Loss on ignition 2.58%, Al2O3 23.51%, SiO2 53.3%, Fe2O3 0.18%, CaO 6.4%, MgO3.85%, K2O 2.41%, Na2O 2.46%, BaO 4.11%, ZnO 1.19%, and the balance is impurities.

[0029] In one implementation of the present application, the chemical components of the corundum powder in the hot-melt plastic sealing glaze include, by weight percentage:

[0030] Loss on ignition 0.51%, Al2O3 97.37%, SiO2 1.12%, Fe2O3 0.08%, CaO 0.09%, MgO0.13%, K2O 0.1%, Na2O 0.4%, and the balance is impurities;

[0031] The chemical components of the ball clay in the hot melt plastic sealing glaze include, by weight percentage:

[0032] Loss on ignition 12.08%, Al2O3 31.18%, SiO2 53.72%, Fe2O3 0.87%, CaO 0.19%, MgO0.1%, K2O 0.19%, Na2O 0.28%, the balance is impurities;

[0033] The chemical components of the washed kaolin in the hot melt plastic sealing glaze include, by weight percentage:

[0034] Loss on ignition 11.49%, Al2O3 35.46%, SiO2 49.45%, Fe2O3 1.05%, CaO 0.13%, MgO0.11%, K2O 1.8%, Na2O 0.05%, the balance is impurities;

[0035] The chemical components of the quartz powder in the hot melt plastic sealing glaze include, by weight percentage:

[0036] Loss on ignition 0.8%, Al2O3 3.35%, SiO2 94.33%, Fe2O3 0.13%, CaO 0.04%, MgO0.13%, K2O 0.84%, Na2O 0.09%, and the balance is impurities;

[0037] The chemical components of the glass powder in the hot-melt plastic sealing glaze include, by weight percentage:

[0038] Loss on ignition 1.86%, Al2O3 22.55%, SiO2 55.11%, Fe2O3 0.14%, CaO 8.63%, MgO5.05%, K2O 3.08%, Na2O 2.93%, ZnO 0.1%, the balance is impurities;

[0039] The chemical components of the frit powder in the hot melt plastic sealing glaze, measured by weight percentage, include:

[0040] Loss on ignition 3.11%, Al2O3 14.42%, SiO2 48.72%, Fe2O3 0.13%, CaO 0.73%, MgO0.96%, K2O 0.42%, Na2O 1.75%, BaO 22.72%, ZnO 6.56%, and the balance is impurities.

[0041] A second aspect of the present application provides an antibacterial ceramic tile, wherein the antibacterial ceramic tile is prepared by the antibacterial ceramic tile preparation method as described above.

[0042] The application provides an antibacterial ceramic tile preparation method and an antibacterial ceramic tile. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a flow chart of a preferred embodiment of the antibacterial ceramic tile preparation method in the application.

[0044] Figure 2 is a specific flow chart of a preferred embodiment of the antibacterial ceramic tile preparation method in the application. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions and advantages of the application clearer and more explicit, the application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0046] In the modern field of building decoration, ceramic tiles are a kind of widely used material. However, with the continuous improvement of people's attention to health and sanitary environment and the enhancement of health awareness, the health and sanitation of home environment have attracted more and more attention. As one of the main materials for home decoration, the antibacterial performance of building ceramic tiles gradually becomes one of the important factors considered by consumers when selecting. Antibacterial ceramic tiles have a wide range of applications and a broad application prospect.

[0047] Families with elderly and children often have higher hygiene requirements for their homes, as these individuals have relatively weaker immune systems and are more susceptible to bacterial infections. Therefore, these families prefer antibacterial ceramic tiles to reduce the risk of infection. For elderly individuals who are bedridden, using antibacterial ceramic tiles in frequently used areas like bathrooms can reduce bacterial growth and provide a healthier environment for the elderly. For families with children, antibacterial ceramic tiles can help reduce the risk of bacteria from playing on the floor.

[0048] People with respiratory diseases or allergies are more sensitive to bacteria and allergens in their living environment. Antimicrobial ceramic tiles can reduce the growth of bacteria and microorganisms, lowering the risk of allergic reactions and respiratory illnesses caused by these bacteria. For asthma sufferers or those prone to allergies, using antimicrobial ceramic tiles can reduce allergens and bacteria in the air, helping to alleviate their condition and improve their quality of life.

[0049] In the existing technology, some technologies introduce a specific content of silver-loaded nano-titanium dioxide into the raw materials for preparing the glaze layer and the surface wax film, so that the fired product can achieve a long-lasting antibacterial effect under the synergistic effect of the glaze layer and the surface wax film layer with a specific chemical composition, while presenting an ideal marble texture and surface texture effect.

[0050] Some antimicrobial ceramic tiles consist, from bottom to top, of a body layer, a glaze layer, and a coating. The glaze layer is made from porous silica coated with zinc oxide; the coating is formed by heat-curing a mixture of silver nitrate solution, sodium citrate solution, and a fluorine-containing compound. This combination of structure and materials gives the ceramic tile excellent overall antimicrobial properties, durability, and antifouling properties.

[0051] Some antimicrobial ceramic tiles consist of a ceramic tile body and an antimicrobial film. The film is formed by depositing antimicrobial powder onto the upper surface of the ceramic tile body using magnetron sputtering. The powder is prepared from raw materials including nano-zinc oxide and modifiers such as sodium polyacrylate and / or polyvinyl pyrrolidone. This method improves the adhesion between the antimicrobial film and the ceramic tile body, thereby enhancing the product's antimicrobial durability.

[0052] Some technologies achieve antibacterial properties by coating the glaze layer of glazed tiles with a suspension containing nano-antimicrobial agents and silicone, then thermally curing the suspension to form an antimicrobial functional layer. This approach eliminates the need for polishing. Silicone is used as a suspending agent for the nano-antimicrobial agent, allowing the nano-antimicrobial agent, silicone, and glaze to react and cure, effectively preventing the functional layer from detaching. Zinc-based antimicrobial materials are also used to form the film, resulting in high transmittance and no impact on the glaze's color.

[0053] Some technologies provide antibacterial liquids containing silver-based composite antimicrobial agents, antibacterial antique tiles, and their preparation methods. The antibacterial liquid contains a silver-based composite antimicrobial agent (including silver nitrate, silver citrate, and silver acetate), a film-forming agent (including water-based polyurethane resin and water-based polyacrylic resin), and a UV absorber. This antibacterial liquid achieves excellent and long-lasting bactericidal efficacy without affecting the original decorative patterns and matte finish of the antique tiles.

[0054] Some technologies use a first catalyst with higher chemical stability to wrap a second photocatalyst that is easily oxidized and consumed at high temperatures, so as to effectively maintain the photocatalytic performance of the second photocatalyst; the first photocatalyst and the second photocatalyst form a heterojunction during the high-temperature calcination process, expanding the light response range of the first photocatalyst from the ultraviolet light region to the visible light region, greatly broadening the scope of use of antibacterial ceramic glazes while enhancing the antibacterial effect.

[0055] Some technologies add rare earth elements to ceramic materials and make the ceramics antibacterial after high-temperature firing. The addition of rare earth elements can change the crystal structure and surface properties of the ceramics, thereby inhibiting the growth and reproduction of bacteria.

[0056] Some technologies are to design the composition of composite antibacterial agents and add composite antibacterial agents to the existing glaze. After firing, the ceramic tiles have high-efficiency, stable and long-lasting antibacterial properties, and can also enable the ceramic tiles to maintain their proper glazed appearance.

[0057] There are certain differences in the antibacterial performance of different brands and products, but the actual effects are difficult to directly compare due to different testing standards and methods. Despite this, antibacterial ceramic tiles currently have the problem of insufficient antibacterial durability. After repeated wear or cleaning, the antibacterial performance decreases significantly, and it is impossible to maintain a stable antibacterial effect for a long time; the antibacterial distance is limited, and the antibacterial effect can only be exerted when the bacteria are in direct contact with the surface of the ceramic tile or at a very close distance. When there is a certain distance from the tile surface, the antibacterial effect drops sharply, making it difficult to effectively prevent and control bacteria in the surrounding space; the antibacterial species are relatively single, and the same antibacterial ceramic tile often only has antibacterial activity against one or two species of bacteria, and the antibacterial spectrum is relatively narrow. In actual application scenarios, facing a complex and diverse microbial environment, it is difficult to meet the needs of simultaneously resisting multiple species of bacteria, and the adaptability is poor.

[0058] Therefore, the existing technology still has deficiencies in antibacterial durability, antibacterial types, and antibacterial distance. This application can improve the antibacterial performance and quality stability of the product to meet the growing antibacterial demand of consumers and promote the widespread application of antibacterial ceramic tiles in the modern home decoration market.

[0059] The present invention provides a method for preparing antibacterial ceramic tiles, such as Figure 1 As shown, the method for preparing an antibacterial ceramic tile includes:

[0060] Step S100, preparing ceramic powder, wherein the raw materials of the ceramic powder include, by mass percentage, 9-16% of high sodium feldspar, 3-8% of calcined talc, 5-12% of corundum powder, 2-6% of silica powder, 2-6% of boron oxide, 0-4% of calcined clay, and 30-80% of ceramic glaze powder;

[0061] Step S200: applying a pre-prepared specific ground glaze to the surface of the ceramic body to be processed to form a ground glaze base layer, wherein the specific ground glaze is obtained by adding the ceramic powder to the ground glaze;

[0062] Step S300: inkjet a decorative pattern on the surface of the base glaze substrate to form a decorative pattern layer, apply dry particles on the decorative pattern layer to form a dry particle layer, and dry the dry particle layer;

[0063] Step S400: applying a pre-prepared specific hot melt plastic sealing glaze on the dry dry particle layer to obtain a hot melt plastic sealing layer, and then firing in a kiln to obtain an antibacterial ceramic tile. The specific hot melt plastic sealing glaze is obtained by adding the ceramic powder to the hot melt plastic sealing glaze.

[0064] Specifically, according to the set ratio, the prepared ceramic powder is added to the base glaze and mixed evenly to obtain a specific base glaze. When the mixing ratio of the base glaze and the special ceramic powder is within the preset range and the specific gravity of the base glaze is 1.45-1.78, 3-8g of ceramic powder is added to 100g of the base glaze slurry. A glaze spraying process or a glaze pouring process is used to apply the specific base glaze to the surface of the ceramic tile blank to form a base glaze layer. A digital inkjet printer is used to print digital ceramic ink on the surface of the base glaze to form a pattern decoration layer. Some designs will print digital functional glossy and matte ceramic ink decorations at the same time, and some designs will also print functional digital glossy and matte shaped inks at the same time. The pattern decoration layer includes color pattern decoration, functional ceramic ink pattern decoration, and shaped ink texture decoration.

[0065] A dry granulator applies dry granular material to the surface of the patterned decorative layer, allowing the shaping ink to bond with the dry granular material, initially securing the dry granular material and forming a dry granular layer. An exhaust fan removes any excess dry granular material that has not yet formed and adhered, allowing it to be recycled. Specifically, because the printed shaping ink has a certain grayscale and pattern texture, when dry granular material is applied to areas where the shaping ink has not been applied, the dry granular material remains loose and cannot bond or secure to the brick surface. Therefore, under the suction force of the exhaust fan, any dry granular material that has not been bonded and secured becomes excess dry granular material and is sucked away for recycling.

[0066] Enter the drying kiln for preliminary drying, so that the shaping ink and the dry particles on the surface can be more firmly bonded, and the preliminary shaped dry particle layer can be further fixed to stabilize the preliminary formed pattern. Spray a specific hot-melt plastic sealing glaze on the surface of the brick that already carries the dry particle layer to form a hot-melt plastic sealing layer. The specific hot-melt plastic sealing glaze refers to the use of the prepared ceramic powder and the original production hot-melt plastic sealing glaze slurry mixed in a certain proportion. For example, 100g of hot-melt plastic sealing glaze, specific gravity 1.78, 2g of ceramic powder, glaze amount 360±3g / m 2 ; Hot melt plastic sealing glaze 100g, specific gravity 1.78, special ceramic powder 3g, glaze amount 420±3g / m 2 .

[0067] The product is fired in a kiln to obtain a broad-spectrum and strong antibacterial ceramic tile. In the embodiment of the present application, the firing system does not need to be specially adjusted, and the firing system is the same as that of the products produced by the existing hot melt plastic sealing technology. The specific flow chart is as follows Figure 2 shown.

[0068] The ceramic powder provided by the present invention, which can be used for base glaze, is obtained through a solid-phase reaction from a specific raw material formula. The raw materials include various components such as high-sodium feldspar, calcined talc, and silica powder. The resulting ceramic tiles utilize the antibacterial principle of far-infrared waves, exhibiting advantages such as long-range antibacterial properties, broad-spectrum antibacterial properties, and strong antibacterial durability. They can effectively inhibit a variety of common harmful bacteria, such as Escherichia coli and Staphylococcus aureus, with an antibacterial rate of over 99%, and can maintain high antibacterial properties even after 500 washes. Furthermore, the ceramic tiles are safe and environmentally friendly, have stable physical properties, and are both decorative and functional, making them suitable for a wide range of applications in various fields, including home, medical, and public areas.

[0069] The ceramic powder is a ceramic powder obtained through formula development and solid phase reaction. The chemical composition analysis of the raw materials used in the ceramic powder is shown in Table 1 (in terms of mass percentage).

[0070] Table 1

[0071]

[0072] In a specific embodiment, the raw materials of the ceramic powder include, by mass percentage, 15.5% high sodium feldspar, 7.5% burned talc, 11.5% corundum powder, 6% silica powder, 5.5% boron oxide, 4% calcined clay, and 50% ceramic glaze powder.

[0073] In one embodiment of the present application, the chemical components of the ceramic powder, calculated by mass percentage, include:

[0074] Na2O 1.5~3%, MgO 1~3.5%, Al2O3 40~55%, SiO2 37~44%, B2O3 2~8%, La2O3 0.4~1.5%.

[0075] In a specific embodiment, the chemical components of the ceramic powder, calculated by mass percentage, include: Na2O2.42%, MgO 2.48%, Al2O3 45.82%, SiO2 41.24%, B2O3 5.56%, and La2O3 0.79%.

[0076] In the embodiment of the present application, the chemical components of the ceramic glaze powder, calculated by mass percentage, include:

[0077] Loss on ignition 0.6~0.82%, Al2O3 56~59%, SiO2 32~35%, Fe2O3 0.02~0.03%, CaO0.2~0.35%, MgO 0~0.1%, K2O 1~2%, Na2O 1~2%, BaO 0~0.02%, La2O3 1.5~2%.

[0078] Specifically, the ceramic glaze powder is a ceramic powder containing rare earth lanthanum.

[0079] In an embodiment of the present application, the method for preparing the ceramic powder includes:

[0080] Step S100: Mixing 25-31% of high sodium feldspar, 11-15% of calcined talc, 20-24% of corundum powder, 11-18% of silica powder, 4-12% of boron oxide, and 6-8% of calcined clay, by mass percentage, and calcining to prepare a pre-calcined formula;

[0081] Step S200: Grinding the pre-fired formula to obtain pre-fired powder;

[0082] Step S300, mixing the pre-fired powder and ceramic glaze powder and calcining them to obtain a calcined material;

[0083] Step S400: Grind the calcined material to obtain ceramic powder.

[0084] The ceramic powder prepared by the present invention is similar to tourmaline. Tourmaline is a mineral with piezoelectric and pyroelectric properties. Tourmaline ceramics, produced by combining tourmaline with ceramic processing, are capable of emitting far-infrared radiation. When exposed to external stimuli such as heat or pressure, ions in the crystal structure of tourmaline ceramics shift, causing a change in the dipole moment, which in turn generates an electric field and emits far-infrared radiation with a wavelength of 4-16 μm.

[0085] Tourmaline ceramics on the market are mainly made from natural tourmaline materials. Natural tourmaline material resources are limited. With the increase in mining volume, high-quality natural tourmaline ore sources are gradually decreasing, and costs are rising. In addition, the purity and quality of natural tourmaline vary greatly. Tourmaline from different origins and different veins has differences in chemical composition and physical properties. Strict screening and grading are required to ensure the stability of product quality. The balance between its usage content and ceramic performance is difficult to control, resulting in unstable performance. In order to give full play to the function of tourmaline ceramics to emit far-infrared rays, the tourmaline content needs to be increased appropriately. However, adding too much will affect the sintering performance of the ceramic tiles, causing defects such as cracks in the products, which places very high demands on the production process and formula design. The durability of natural tourmaline ceramics is poor. Although they theoretically have the function of emitting far-infrared rays, in actual use, these functions will gradually weaken due to factors such as time, usage environment, and cleaning, making it difficult to ensure long-term stable performance. The present invention can add ceramic powder to both the base glaze and the top glaze at the same time, so even if the top glaze is worn, it will not affect the stability and durability of the product performance.

[0086] In a specific embodiment, the raw materials of the pre-burned powder include, by mass percentage, 31% high sodium feldspar, 15% burned talc, 23% corundum powder, 12% silicon powder, 11% boron oxide, and 8% calcined clay.

[0087] In one embodiment of the present application, the chemical components of the pre-calcined powder, calculated by mass percentage, include: Na2O 2.5-4%; MgO 3-5%; Al2O3 26-34%; SiO2 38-54%; and B2O3 3.5-12%.

[0088] In a specific embodiment, the chemical components of the pre-calcined powder include, by mass percentage, 3.54% Na2O, 4.9% MgO, 32.74% Al2O3, 47.71% SiO2, and 11.11% B2O3.

[0089] In an embodiment of the present application, 25-31% of high sodium feldspar, 11-15% of burnt talc, 20-24% of corundum powder, 11-18% of silicon micropowder, 4-12% of boron oxide, and 6-8% of calcined clay are mixed and fired, and before preparing the pre-fired formula, the process also includes: crushing and grinding the corundum powder and silicon micropowder so that the D50 of the corundum powder and silicon micropowder is controlled at 1-3 μm.

[0090] Specifically, the corundum powder and silica powder are first pulverized and ground, with the D50 value controlled at 1-3 μm. The ingredients are weighed and mixed according to a formula of 25-31% high sodium feldspar, 11-15% calcined talc, 20-24% corundum powder, 11-18% silica powder, 4-12% boron oxide, and 6-8% calcined clay. The mixed ingredients are then pre-calcined. The pre-calcined product is then pulverized and ground a second time to obtain a pre-calcined powder. The pre-calcined powder is then mixed with ceramic glaze powder in a suitable proportion and calcined in a high-temperature furnace. The calcined material is then pulverized and ground a third time to obtain the special ceramic powder for later use.

[0091] The present invention requires high raw material fineness, with a D50 of 1-3 μm at the submicron level. Processing the lanthanum oxide-containing rare earth element material to the submicron level increases the material's specific surface area and surface atomic ratio, making the coordination environment of surface atoms different from that of bulk atoms. This alters the crystal field environment, potentially affecting electron energy levels and transitions, and improving infrared emission efficiency.

[0092] In the embodiment of the present application, the raw materials of the hot-melt plastic sealing glaze include, by weight percentage, 2-3% corundum powder, 1-2% ball clay, 2-5% washed kaolin, 0-3% quartz powder, 65-85% glass powder, and 15-24% frit powder. The chemical composition of the hot-melt plastic sealing glaze, by weight percentage, includes: loss on ignition 2.58%, Al2O3 23.51%, SiO2 53.3%, Fe2O3 0.18%, CaO 6.4%, MgO 3.85%, K2O 2.41%, Na2O 2.46%, BaO 4.11%, ZnO 1.19%, and the remainder is impurities.

[0093] In a specific embodiment, the raw materials of the hot melt plastic sealing glaze include, by weight percentage, 2.8% corundum powder, 1.8% ball clay, 3.6% washed kaolin, 1.8% quartz powder, 72% glass powder, and 18% frit powder.

[0094] In one embodiment of the present application, the chemical components of the corundum powder in the hot melt plastic sealing glaze include, by weight percentage:

[0095] Loss on ignition 0.51%, Al2O3 97.37%, SiO2 1.12%, Fe2O3 0.08%, CaO 0.09%, MgO0.13%, K2O 0.1%, Na2O 0.4%, and the balance is impurities;

[0096] The chemical components of the ball clay in the hot melt plastic sealing glaze include, by weight percentage:

[0097] Loss on ignition 12.08%, Al2O3 31.18%, SiO2 53.72%, Fe2O3 0.87%, CaO 0.19%, MgO0.1%, K2O 0.19%, Na2O 0.28%, the balance is impurities;

[0098] The chemical components of the washed kaolin in the hot melt plastic sealing glaze include, by weight percentage:

[0099] Loss on ignition 11.49%, Al2O3 35.46%, SiO2 49.45%, Fe2O3 1.05%, CaO 0.13%, MgO0.11%, K2O 1.8%, Na2O 0.05%, the balance is impurities;

[0100] The chemical components of the quartz powder in the hot melt plastic sealing glaze include, by weight percentage:

[0101] Loss on ignition 0.8%, Al2O3 3.35%, SiO2 94.33%, Fe2O3 0.13%, CaO 0.04%, MgO0.13%, K2O 0.84%, Na2O 0.09%, and the balance is impurities;

[0102] The chemical components of the glass powder in the hot-melt plastic sealing glaze include, by weight percentage:

[0103] Loss on ignition 1.86%, Al2O3 22.55%, SiO2 55.11%, Fe2O3 0.14%, CaO 8.63%, MgO5.05%, K2O 3.08%, Na2O 2.93%, ZnO 0.1%, the balance is impurities;

[0104] The chemical components of the frit powder in the hot melt plastic sealing glaze, measured by weight percentage, include:

[0105] Loss on ignition 3.11%, Al2O3 14.42%, SiO2 48.72%, Fe2O3 0.13%, CaO 0.73%, MgO0.96%, K2O 0.42%, Na2O 1.75%, BaO 22.72%, ZnO 6.56%, and the balance is impurities.

[0106] The present invention develops raw material formulas, finely processes raw materials, optimizes raw material ratios and preparation processes, and allows the prepared calcined functional materials to be evenly dispersed in the matrix of the ceramic glaze. After high-temperature firing, a specific microstructure is formed to facilitate the generation of stable far-infrared waves. During the preparation of ceramic tiles, after high-temperature sintering and other process treatments, the functional materials interact with the ceramic matrix, forming the characteristic of being able to continuously emit far-infrared waves at room temperature. Far-infrared waves have the characteristic of having a similar vibration frequency to the biological molecules of various bacteria. When far-infrared waves act on bacteria, they can cause resonance of the biological molecules inside the bacteria, destroying the bacterial cell structure, protein synthesis and metabolic processes, thereby achieving the antibacterial purpose. The sample of the present invention has a far-infrared wave emissivity of 0.863 in the range of 8μm-14μm. The far-infrared emissivity of ordinary building ceramic tiles is usually between 0.70-0.85, depending on the material composition and process. The emissivity of functional far-infrared ceramic tiles is generally considered to reach above 0.85, which indicates a significant antibacterial effect and can be called a medical-grade antibacterial ceramic tile. The far-infrared emissivity of the technology of the present invention reaches 0.863, which has a significant antibacterial effect.

[0107] This invention utilizes meticulous processing and treatment of the functional materials, along with multiple ceramic glaze encapsulation techniques, to ensure a secure bond within the ceramic tile, making it less susceptible to external factors such as abrasion, washing, and wiping. Furthermore, the tile's surface is reinforced to improve its wear and corrosion resistance, further protecting the far-infrared emitting functional materials within the tile's glaze and ensuring long-term, stable antibacterial properties.

[0108] Far-infrared waves generally refer to far-infrared rays, which have the longest wavelength among infrared rays and are invisible. Far-infrared rays with wavelengths between 4 and 16 μm are generally referred to as "life waves." They are a combination of light and electromagnetic waves, possessing both penetrating and absorbing properties, making them capable of being absorbed by living organisms. The normal absorption and emission of far-infrared life waves resonate and resonate within the molecules of living organisms, promoting the activation of water molecules within them.

[0109] Far-infrared radiation has certain antibacterial properties. Far-infrared radiation can raise the temperature of irradiated objects, creating a warming effect. Bacteria typically have a relatively fixed temperature range for growth. For example, many pathogenic bacteria thrive around 37°C. When the warming effect of far-infrared radiation pushes the ambient temperature beyond this range, bacterial growth and reproduction are inhibited. This effect has been applied in the disinfection of some medical devices. Using far-infrared heating equipment to raise the temperature to a certain level and maintain it for a certain period of time can effectively reduce the number of bacteria on surfaces, disrupting their physiological structure and metabolic processes through the high temperature.

[0110] Far-infrared radiation can cause molecular vibrations within bacterial cells, disrupting their structure. Bacterial cell structures, including cell walls and cell membranes, are essential for bacterial survival. The energy of far-infrared radiation can cause the molecular bonds within bacterial cell walls and membranes to vibrate. When the energy is high enough, these bonds break. Some studies have found that high-intensity far-infrared radiation can damage the peptidoglycan structure within bacterial cell walls. Peptidoglycan is a major component of bacterial cell walls. Its destruction can lead to loss of bacterial cell integrity, leakage of contents, and ultimately bacterial death. Furthermore, damage to the cell membrane can impair bacterial material exchange and energy metabolism, further inactivating the bacteria.

[0111] Normal bacterial metabolism relies on the catalytic action of various enzymes, proteins with specific spatial structures. Far-infrared energy can alter the molecular structure of enzymes, rendering them inactive. Because bacterial respiration requires the participation of multiple enzymes, when these enzymes are inactivated by far-infrared radiation, bacterial respiratory metabolism is hindered, preventing them from generating sufficient energy to sustain their life.

[0112] Of course, the antibacterial effect of far-infrared radiation is affected by many factors, such as its wavelength, intensity, and exposure time, as well as the type and quantity of bacteria and the environment in which they are located. Therefore, when conducting research on broad-spectrum, highly effective antibacterial ceramic tile technology, we comprehensively considered the impact of various factors on far-infrared antibacterial properties. We conducted repeated experiments and demonstrations on aspects such as raw material preparation, application methods, processing methods, and dosage in order to achieve better antibacterial effects.

[0113] The antibacterial ceramic tiles of the present invention have excellent antibacterial properties, including the following: First, long-distance antibacterial properties. Different from traditional surface-contact antibacterial ceramic tiles, far-infrared wave antibacterial ceramic tiles can achieve effective antibacterial properties within a certain spatial distance. Far-infrared waves can propagate to the surrounding space, inhibiting and killing bacteria within a certain distance from the surface of the ceramic tiles. Through the observation of fresh milk deterioration experiments, the antibacterial distance can exert antibacterial effects within the range of several centimeters to tens of centimeters, thereby effectively expanding the antibacterial spatial range, and can better actively prevent and control bacteria in the surrounding environment, reducing the risk of bacterial transmission in the space. Second, broad-spectrum antibacterial properties. It has high-efficiency antibacterial activity against a variety of common harmful bacteria, such as Escherichia coli, Staphylococcus aureus, Candida albicans, Pseudomonas aeruginosa, etc., and the antibacterial rate can reach more than 99%. The frequency of far-infrared waves is close to the vibration frequency of the biological molecules of various bacteria, which can cause the resonance of the biological molecules inside the bacteria, thereby destroying the cell structure, protein synthesis and metabolic process of the bacteria, achieving broad-spectrum antibacterial effects, and can effectively cope with complex microbial environments. It is widely used in hospitals, food processing workshops, home kitchens, bathrooms and other places. Third, it has strong antibacterial durability. It can still maintain its initial antibacterial ability after long-term scrubbing and wiping. This is because its antibacterial function does not rely on the antibacterial agent coated on the surface that is easy to fall off or lose its effectiveness, but through the special material combination and process design, the ceramic tile can stably emit far-infrared waves to achieve antibacterial effect. According to GB / T9266, the antibacterial durability test was carried out. After 500 scrubbing operations on the antibacterial ceramic tile of the present invention with a 5% concentration of sodium hypochlorite disinfectant as the washing liquid, its antibacterial ability can still maintain more than 99% of the initial level (the standard requires ≥85%), and can even still reach more than 99.99%, which is significantly better than existing antibacterial ceramic tile products and can continuously and stably exert antibacterial effects throughout the entire service life of the ceramic tile.

[0114] The antibacterial ceramic tiles of the present invention are highly safe and environmentally friendly, specifically including the following: First, no harmful substances are released. Far-infrared wave antibacterial ceramic tiles do not require the addition of antibacterial agents such as silver ions that may cause potential harm to the human body or the environment during the antibacterial process, nor do they have the radiation risk caused by ultraviolet excitation like some photocatalytic antibacterial ceramic tiles. No harmful substances are released during use, which is friendly to human health and the environment. Second, they meet environmental protection standards. Environmental protection is also emphasized in the production process, and the raw materials and preparation processes used meet relevant environmental protection requirements. For example, the ceramic matrix materials used are usually common kaolin, feldspar, quartz, etc., which do not contain harmful substances.

[0115] The antibacterial ceramic tiles of the present invention have stable physical properties, specifically including: First, high hardness and wear resistance. They have hardness and wear resistance comparable to or even better than ordinary ceramic tiles, can withstand various frictions and scrapes in daily use, are not prone to scratches and wear, and maintain the integrity and aesthetics of the tile surface, thereby ensuring that their antibacterial properties are not affected during long-term use, while also extending the service life of the ceramic tiles. Second, good corrosion resistance. They have good corrosion resistance to common chemical substances, are not easily eroded by chemicals such as acids and alkalis, and can be stably used in places with different chemical environments, such as kitchens, bathrooms, and other places that are frequently exposed to chemicals such as detergents, and can still maintain good performance.

[0116] The antibacterial ceramic tiles of the present invention are both decorative and functional, specifically including: First, rich decorative effects. In appearance, far-infrared wave antibacterial ceramic tiles have rich decorative effects similar to traditional ceramic tiles. They can meet various decoration styles and personalized needs through different colors, patterns, textures and other designs. They can not only achieve antibacterial functions, but also beautify the space. Second, integration with multiple functions. In addition to the antibacterial function, it can also be integrated with other functions, such as negative ion release, air purification and other functions, to further enhance the environmental performance and use value of ceramic tiles, and create a healthier and more comfortable indoor environment for people.

[0117] Therefore, compared with the prior art, the present invention has the following beneficial effects:

[0118] First, it overcomes the problem of poor antibacterial durability of existing antibacterial ceramic tiles, so that they can maintain stable and efficient antibacterial properties even after repeated scrubbing and wiping during long-term use.

[0119] Second, it breaks through the limitation that traditional antibacterial ceramic tiles can only exert antibacterial effects in surface contact or close distance, achieves effective antibacterial effects within a certain spatial distance range, expands the antibacterial spatial range, and actively prevents and controls bacteria in the surrounding environment.

[0120] Third, it solves the problem of a single antibacterial strain, making ceramic tiles have broad-spectrum antibacterial properties and capable of producing highly effective antibacterial activity against a variety of common harmful bacteria, so as to adapt to the complex microbial environment in different application scenarios.

[0121] Specific embodiments are listed below for illustration.

[0122] Example 1

[0123] First, a pre-existing ceramic tile body, formed using a mature press process, is selected. This body meets the quality requirements of conventional ceramic tile bodies in terms of basic properties such as size and strength. Next, a base glaze is selected that is compatible with the selected ceramic tile body. The properties of this base glaze ensure that the tile will not experience excessive deformation or loss of thermal shock resistance during the subsequent firing process. Finally, a special ceramic powder is prepared.

[0124] The corundum powder and silica powder are first pulverized and ground to a D50 value within the 1-3μm range. The raw materials are weighed and mixed according to the specific ceramic powder formula (31% sodium feldspar, 15% calcined talc, 23% corundum powder, 11% silica powder, 11% boron oxide, and 8% calcined clay). These ingredients are then thoroughly mixed. The resulting mixture is pre-calcined at 700°C for two hours. After pre-calcination, the product is pulverized and ground a second time to obtain a calcined powder. Its chemical composition by weight is 3.45% Na2O, 4.77% MgO, 31.88% Al2O3, 46.46% SiO2, and 10.82% B2O3.

[0125] The pre-fired powder and ceramic glaze powder are then mixed in a 1:1 ratio and calcined in a high-temperature furnace at 1000°C for three hours. Finally, the calcined material is pulverized and ground a third time to produce the special ceramic powder for later use. The ceramic glaze powder contains the rare earth element lanthanum and has a chemical composition of: loss on ignition 0.82%, Al2O3 58.9%, SiO2 34.76%, Fe2O3 0.02%, CaO 0.35%, MgO 0.06%, K2O 1.96%, Na2O 1.29%, TiO2 0.02%, BaO 0.02%, and La2O3 1.57%.

[0126] Weigh 100g of the selected base glaze, with a specific gravity of 1.73. Add 6g of special ceramic powder to the base glaze, mix thoroughly, and adjust the specific gravity to 1.50. Spray the base glaze containing the special ceramic powder onto the surface of the brick at a rate of 470±3g / ㎡, forming a base glaze layer. A digital inkjet printer is then used to print decorative patterns on the base glaze layer, including conventional color patterns, functional ceramic ink patterns, and textured patterns using shaped inks.

[0127] According to existing technology, dry granular materials are spread dry-way using a dry granulator on the surface of a brick that has been printed with digitally shaped ink. Due to the effect of the shaped ink, the dry granular materials can adhere to it, initially fixing the dry granular materials and forming a dry granular layer. During this process, due to the specific grayscale and pattern texture of the printed shaped ink, the dry granules are loose when spread in areas where the shaped ink has not been printed, and cannot adhere to or be fixed to the brick surface. Therefore, the suction force of the exhaust fan is used to suck away the excess dry granules that have not been fixed and recover them for subsequent reuse.

[0128] The purpose of drying the surface is to make the shaping ink adhere more firmly to the dry particles on the surface and further consolidate the initially formed pattern.

[0129] A special hot-melt plastic sealing glaze slurry is prepared by uniformly mixing the special ceramic powder prepared in the above steps with the original hot-melt plastic sealing glaze slurry used in production in a certain proportion. The selected hot-melt plastic sealing glaze slurry weighs 100g and has a specific gravity of 1.78. 3g of special ceramic powder is added to the glaze slurry, mixed evenly, and the specific gravity is adjusted to 1.36. The raw materials for the hot-melt plastic sealing glaze used in production are composed of the following weight percentages: 2.8% corundum powder, 1.8% ball clay, 3.6% washed kaolin, 1.8% quartz powder, 72% GP328 glass powder, and 18% JF300 frit powder. The special hot-melt plastic sealing glaze slurry is sprayed on the surface of the brick blank already loaded with a dry particle layer at a spraying rate of 430±3g / m2 to form a hot-melt plastic sealing layer. Finally, the brick blank is sent to a kiln for firing. The firing kiln system does not need to be specially adjusted and has the same firing system as products produced by existing hot-melt plastic sealing technology, thereby obtaining far-infrared wave antibacterial ceramic tiles.

[0130] Example 2

[0131] The ceramic tile green body was also produced using a mature, existing press-molded process, and its quality standards were consistent with those of the green body in Example 1. The preparation process for the special ceramic powder was similar to that in Example 1, with the same raw material formula (by weight percentage) consisting of 31% sodium feldspar, 15% calcined talc, 23% corundum powder, 11% silica powder, 11% boron oxide, and 8% calcination. After the same series of process steps, including pulverization, pre-sintering, and mixing and calcining, the special ceramic powder was obtained.

[0132] The base glaze was chosen to match the green body, weighing 100g with a specific gravity of 1.78. A pouring glaze process was used to apply a base glaze containing special ceramic powder to the surface of the green body at a rate of 420±3g / ㎡, forming a base glaze layer. Decorative patterns were then inkjet-applied onto the base glaze layer, including color patterns, functional ceramic ink patterns, and shaped ink textures. This process was identical to Example 1.

[0133] The subsequent steps of preparing the dry particle layer, recovering excess dry particles, and drying treatment are consistent with those in Example 1.

[0134] The raw material composition for preparing the special hot-melt plastic sealing glaze slurry is the same as that in Example 1, namely 2.8% corundum powder, 1.8% ball clay, 3.6% washed kaolin, 1.8% quartz powder, 72% glass powder, and 18% frit powder. 100g of the hot-melt plastic sealing glaze slurry with a specific gravity of 1.78 is weighed and evenly mixed with 3g of special ceramic powder, and the specific gravity is adjusted to 1.40. The glaze is sprayed on the surface of the brick blank already loaded with a dry particle layer at a spraying amount of 330±3g / ㎡ to form a hot-melt plastic sealing layer. Finally, the brick blank is placed in a kiln for firing. The firing kiln system is the same as that for products produced by existing hot-melt plastic sealing technology to obtain far-infrared wave antibacterial ceramic tiles.

[0135] Antibacterial and durability tests have shown that the ceramic tiles obtained by the present invention have high durability and antibacterial effects on multiple bacterial species.

[0136] Example 1 adopts the industry standard JCT 897-2014 "Antibacterial Performance of Antibacterial Ceramic Products", and the test data is shown in Table 2.

[0137] Table 2

[0138]

[0139] Example 2 adopts the industry standard JCT 897-2014 "Antibacterial Performance of Antibacterial Ceramic Products", and the test data are shown in Table 3.

[0140] Table 3

[0141]

[0142]

[0143] It can be seen from the above examples that the antibacterial ceramic tiles of the present invention have achieved remarkable effects in long-range antibacterial, antibacterial durability and broad-spectrum antibacterial performance, effectively solving the problems existing in the prior art and having broad application prospects and market value.

[0144] The present invention also provides an antibacterial ceramic tile, wherein the antibacterial ceramic tile is prepared by the antibacterial ceramic tile preparation method as described above.

[0145] The antibacterial ceramic tiles provided by the present invention can effectively inhibit the growth and spread of various bacteria, reduce the risk of bacterial infection, and provide a healthier and safer home, medical, public activity and other environment, especially for the elderly, children, patients and other people with weak immunity and people who pay attention to the quality of healthy life. It is suitable for many fields such as home (kitchen, bathroom, bedroom, living room, etc.), medical (operating room, ward, corridor, etc.), public (kindergarten, school, supermarket, shopping mall, etc.), commercial office (hotel, restaurant, conference room, etc.), etc., to meet the needs of different places for antibacterial functions and improve the overall environmental sanitation level. Due to its strong antibacterial durability, the frequency of replacing ceramic tiles due to the decline of antibacterial performance is reduced, and the long-term use cost is reduced; and the production process is environmentally friendly, and no harmful substances are released during use, which is in line with the concept of sustainable development and is beneficial to environmental protection. While having excellent antibacterial performance, it maintains good decorativeness and can be adapted to a variety of decoration styles to improve the quality of space and comfort of use.

[0146] The present invention provides a method for preparing an antibacterial ceramic tile and an antibacterial ceramic tile. The method for preparing the antibacterial ceramic tile comprises: preparing ceramic powder, wherein the raw materials of the ceramic powder comprise, by mass percentage, 9-16% of high sodium feldspar, 3-8% of burnt talc, 5-12% of corundum powder, 2-6% of silicon micropowder, 2-6% of boron oxide, 0-4% of calcined clay, and 30-80% of ceramic glaze powder; applying a pre-prepared specific base glaze to the surface of a ceramic body to be treated to form a base glaze substrate, wherein the specific base glaze is obtained by adding the ceramic powder to the base glaze; inkjet decorative patterns on the surface of the base glaze substrate to form a pattern decoration layer, applying dry particles on the pattern decoration layer to form a dry particle layer, and drying the dry particle layer; applying a pre-prepared specific hot-melt plastic sealing glaze on the dried dry particle layer to obtain the hot-melt plastic sealing layer, and firing the obtained layer in a kiln to obtain the antibacterial ceramic tile, wherein the specific hot-melt plastic sealing glaze is obtained by adding the ceramic powder to the hot-melt plastic sealing glaze. The present invention adds ceramic powder capable of generating far-infrared waves to the base glaze and specific hot-melt plastic sealing glaze, so that the ceramic powder interacts with the ceramic matrix to form the characteristic of continuously emitting far-infrared waves at room temperature. The ceramic powder and the ceramic matrix are firmly bonded inside the ceramic tile. Even if the surface glaze is worn, it will not affect the stability and durability of the product performance, thereby maintaining stable and efficient antibacterial properties.

[0147] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for preparing antibacterial ceramic tiles, characterized in that: The preparation method of the antibacterial ceramic tile comprises: Prepare ceramic powder, wherein the raw materials of the ceramic powder include, by mass percentage, 9-16% high sodium feldspar, 3-8% burned talc, 5-12% corundum powder, 2-6% silica powder, 2-6% boron oxide, 0-4% calcined clay, and 30-80% ceramic glaze powder, and the sum of the contents of each component is equal to 100%; Applying a pre-prepared specific ground glaze to the surface of the ceramic body to be treated to form a ground glaze base layer, wherein the specific ground glaze is obtained by adding the ceramic powder to the ground glaze; inkjet a decorative pattern on the surface of the base glaze substrate to form a pattern decoration layer, apply dry particles on the pattern decoration layer to form a dry particle layer, and dry the dry particle layer; Applying a pre-prepared specific hot-melt plastic sealing glaze on the dry dry particle layer to obtain a hot-melt plastic sealing layer, and then firing in a kiln to obtain an antibacterial ceramic tile, wherein the specific hot-melt plastic sealing glaze is obtained by adding the ceramic powder to the hot-melt plastic sealing glaze; The chemical components of the ceramic powder, calculated by mass percentage, include: Na2O 1.5~3%, MgO 1~3.5%, Al2O3 40~55%, SiO2 37~44%, B2O3 2~8%, La2O3 0.4~1.5%, the sum of the contents of each component is equal to 100%; The preparation method of the ceramic powder comprises: By weight percentage, 25-31% of high sodium feldspar, 11-15% of burned talc, 20-24% of corundum powder, 11-18% of silica powder, 4-12% of boron oxide, and 6-8% of calcined clay are mixed and fired to prepare a pre-fired formula, wherein the sum of the contents of each component is equal to 100%; Grinding the pre-fired formula to obtain a pre-fired powder; The pre-fired powder and ceramic glaze powder are mixed and then calcined to obtain a calcined material; Grinding the calcined material to obtain ceramic powder; The raw materials of the hot melt plastic sealing glaze include, by weight percentage: Corundum powder 2~3%, ball clay 1~2%, washed kaolin 2~5%, quartz powder 0~3%, glass powder 65~85%, frit powder 15~24%. The sum of the contents of each component is equal to 100%.

2. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The chemical components of the ceramic glaze powder, calculated by mass percentage, include: Loss on ignition 0.6~0.82%, Al2O3 56~59%, SiO2 32~35%, Fe2O3 0.02~0.03%, CaO 0.2~0.35%, MgO0~0.1%, K2O 1~2%, Na2O 1~2%, BaO 0~0.02%, La2O3 1.5~2%. The sum of the contents of each component is equal to 100%.

3. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The chemical components of the pre-calcined powder are calculated by mass percentage and include: Na2O 2.5~4%; MgO 3~5%; Al2O3 26~34%; SiO2 38~54%; B2O3 3.5~12%. The sum of the contents of each component is equal to 100%.

4. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: Before preparing the pre-fired formula, 25-31% of high sodium feldspar, 11-15% of calcined talc, 20-24% of corundum powder, 11-18% of silica powder, 4-12% of boron oxide, and 6-8% of calcined clay are mixed and fired, and the following steps are further included: The corundum powder and the silicon micropowder are crushed and ground so that the D50 of the corundum powder and the silicon micropowder is controlled within 1~3μm.

5. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The chemical components of the hot melt plastic sealing glaze include, by weight percentage: Loss on ignition 2.58%, Al2O3 23.51%, SiO2 53.3%, Fe2O3 0.18%, CaO 6.4%, MgO 3.85%, K2O2.41%, Na2O 2.46%, BaO 4.11%, ZnO 1.19%, and the balance is impurities.

6. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The chemical components of the corundum powder in the hot melt plastic sealing glaze include, by weight percentage: Loss on ignition 0.51%, Al2O3 97.37%, SiO2 1.12%, Fe2O3 0.08%, CaO 0.09%, MgO 0.13%, K2O0.1%, Na2O 0.4%, the balance is impurities; The chemical components of the ball clay in the hot melt plastic sealing glaze include, by weight percentage: Loss on ignition 12.08%, Al2O3 31.18%, SiO2 53.72%, Fe2O3 0.87%, CaO 0.19%, MgO 0.1%, K2O0.19%, Na2O 0.28%, the balance is impurities; The chemical components of the washed kaolin in the hot melt plastic sealing glaze include, by weight percentage: Loss on ignition 11.49%, Al2O3 35.46%, SiO2 49.45%, Fe2O3 1.05%, CaO 0.13%, MgO 0.11%, K2O1.8%, Na2O 0.05%, the balance is impurities; The chemical components of the quartz powder in the hot melt plastic sealing glaze include, by weight percentage: Loss on ignition 0.8%, Al2O3 3.35%, SiO2 94.33%, Fe2O3 0.13%, CaO 0.04%, MgO 0.13%, K2O0.84%, Na2O 0.09%, the balance is impurities; The chemical components of the glass powder in the hot-melt plastic sealing glaze include, by weight percentage: Loss on ignition 1.86%, Al2O3 22.55%, SiO2 55.11%, Fe2O3 0.14%, CaO 8.63%, MgO 5.05%, K2O3.08%, Na2O 2.93%, ZnO 0.1%, the balance is impurities; The chemical components of the frit powder in the hot melt plastic sealing glaze, measured by weight percentage, include: Loss on ignition 3.11%, Al2O3 14.42%, SiO2 48.72%, Fe2O3 0.13%, CaO 0.73%, MgO 0.96%, K2O0.42%, Na2O 1.75%, BaO 22.72%, ZnO 6.56%, and the balance is impurities.

7. An antibacterial ceramic tile, characterized in that: The antibacterial ceramic tile is prepared by the antibacterial ceramic tile preparation method according to any one of claims 1 to 6.

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