Antibacterial ceramic tile preparation method and antibacterial ceramic tile

Abstract

The invention provides an antibacterial ceramic tile preparation method and an antibacterial ceramic tile, the method comprises the following steps: preparing ceramic powder, the ceramic powder comprises 9-16% of high sodium feldspar, 3-8% of calcined talc, 5-12% of emery powder, 2-6% of silica powder, 2-6% of boric oxide, 0-4% of calcined soil, and 30-80% of ceramic glaze powder; a specific ground coat is applied to form a ground coat base layer, and the specific ground coat is obtained by adding ceramic powder into the ground coat; forming a pattern decoration layer on the surface of the ground glaze base layer, applying dry granules, forming a dry granule layer, drying the dry granule layer, applying specific hot-melting plastic packaging glaze, and sintering in a kiln to obtain the antibacterial ceramic tile, and the specific hot-melting plastic packaging glaze is obtained by adding ceramic powder into the hot-melting plastic packaging glaze. The ceramic powder capable of generating far infrared waves is added into the ground glaze and the specific hot melting plastic packaging glaze, so that the stability and durability of the product performance are not influenced even if the cover glaze is worn, 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 particularly relates to a preparation method of antibacterial ceramic tiles and antibacterial ceramic tiles. Background Art

[0002] As one of the main materials for home decoration, the antibacterial performance of building ceramic tiles has gradually become one of the important factors considered by consumers when choosing. In the home field, antibacterial ceramic tiles can be used in kitchens, bathrooms, bedrooms, and the floors and walls of living rooms; in the medical field, they can be used in public areas such as hospital operating rooms, wards, hospital corridors, and bathrooms; in the public field, they can be used in crowded places such as kindergartens, school canteens, classrooms, dormitories, bathrooms, and infirmaries; in the commercial office field, they can be used in supermarkets, shopping malls, hotels, restaurants, tea rooms, and meeting rooms, bathrooms, and hospitality rooms with high usage frequencies. The antibacterial demand for building ceramic tiles in modern home decoration shows a gradually increasing trend.

[0003] However, the existing antibacterial ceramic tiles have poor antibacterial durability. During long-term use, after multiple abrasion, washing, and wiping, they cannot maintain stable and efficient antibacterial performance.

[0004] Therefore, there are defects in the existing technology and it 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 preparation method of antibacterial ceramic tiles and antibacterial ceramic tiles aiming at the above-mentioned defects of the existing technology, aiming to solve the problem that the existing antibacterial ceramic tiles have poor antibacterial durability and cannot maintain stable and efficient antibacterial performance during long-term use after multiple abrasion, washing, and wiping.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] The first aspect embodiment of the present application provides a preparation method of antibacterial ceramic tiles. Among them, the preparation method of the antibacterial ceramic tiles includes:

[0008] Prepare ceramic powder. 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 soil, and 30-80% of ceramic glaze powder;

[0009] Apply a pre-prepared specific base glaze to the surface of the ceramic green body to be treated to form a base glaze layer. The specific base glaze is obtained by adding the ceramic powder to the base glaze;

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

[0011] Apply a pre-prepared specific hot-melt sealing glaze on the dry granular layer. After obtaining the hot-melt sealing layer, it is fired in a kiln to obtain an antibacterial ceramic tile. The specific hot-melt sealing glaze is obtained by adding the ceramic powder to the hot-melt sealing glaze.

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

[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 one implementation of the present application, the chemical components of the ceramic glaze powder, by mass percentage, include:

[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 one implementation of the present application, the preparation method of the ceramic powder includes:

[0017] By mass percentage, mix 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, and fire to prepare a pre-fired formula material;

[0018] Grind the pre-fired formula material to obtain a pre-fired powder;

[0019] Mix the pre-fired powder and the ceramic glaze powder and then calcine to obtain a calcined material;

[0020] Grind the calcined material to obtain the ceramic powder.

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

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

[0023] In an implementation manner of the present application, before 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 firing to prepare a pre-fired formula material, it further includes:

[0024] Crush and grind the corundum powder and silica powder so that the D50 of the corundum powder and silica powder is controlled within 1-3 μm.

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

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

[0027] In an implementation manner 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%, MgO 3.85%, K2O 2.41%, Na2O 2.46%, BaO 4.11%, ZnO 1.19%, and the balance is impurities.

[0029] In an implementation manner 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%, MgO 0.13%, 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%, MgO 0.1%, K2O 0.19%, Na2O 0.28%, and 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%, MgO: 0.11%, K2O: 1.8%, Na2O: 0.05%, the balance being impurities;

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

[0036] Loss on ignition: 0.8%, Al2O3: 3.35%, SiO2: 94.33%, Fe2O3: 0.13%, CaO: 0.04%, MgO: 0.13%, K2O: 0.84%, Na2O: 0.09%, the balance being impurities;

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

[0038] Loss on ignition: 1.86%, Al2O3: 22.55%, SiO2: 55.11%, Fe2O3: 0.14%, CaO: 8.63%, MgO: 5.05%, K2O: 3.08%, Na2O: 2.93%, ZnO: 0.1%, the balance being impurities;

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

[0040] Loss on ignition: 3.11%, Al2O3: 14.42%, SiO2: 48.72%, Fe2O3: 0.13%, CaO: 0.73%, MgO: 0.96%, K2O: 0.42%, Na2O: 1.75%, BaO: 22.72%, ZnO: 6.56%, the balance being impurities.

[0041] In the second aspect of the embodiments of the present application, an antibacterial ceramic tile is provided, wherein the antibacterial ceramic tile is prepared by the method for preparing an antibacterial ceramic tile as described above.

[0042] A method for preparing an antibacterial ceramic tile and the antibacterial ceramic tile provided by the present invention. The method for preparing the antibacterial ceramic tile includes: preparing ceramic powder, and 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 fume, 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 the ceramic green body to be treated to form a base glaze layer, and the specific base glaze is obtained by adding the ceramic powder to the base glaze; inkjet decorating a pattern on the surface of the base glaze layer 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 sealing glaze on the dried dry particle layer, obtaining a hot-melt sealing layer, and then firing in a kiln to obtain the antibacterial ceramic tile, and the specific hot-melt sealing glaze is obtained by adding the ceramic powder to the hot-melt sealing glaze. By adding ceramic powder capable of generating far-infrared waves to the base glaze and the specific hot-melt sealing glaze, the present invention enables the ceramic powder to interact with the ceramic matrix, forming the property of continuously emitting far-infrared waves at normal temperature. The ceramic powder and the ceramic matrix are firmly combined inside the ceramic tile, so that even if the surface glaze is worn, it does not affect the stability and durability of the product performance, and further can maintain stable and efficient antibacterial performance. Description of the Drawings

[0043] Figure 1 It is a flow chart of a preferred embodiment of a method for preparing an antibacterial ceramic tile in the present invention.

[0044] Figure 2 It is a specific flow block diagram of a preferred embodiment of a method for preparing an antibacterial ceramic tile in the present invention. Detailed Embodiments

[0045] To make the purpose, technical solutions and advantages of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] In the field of modern architectural decoration, ceramic tiles are a widely used material. However, with the continuous improvement of people's attention to health and hygiene environment and the enhancement of health awareness, the health and hygiene of the home environment have received more and more attention. As one of the main materials for home decoration, the antibacterial performance of architectural ceramic tiles has gradually become one of the important factors considered by consumers when choosing. Antibacterial ceramic tiles have a wide range of application fields and broad application prospects.

[0047] Families with the elderly and children usually have relatively high requirements for the hygiene of the home environment. Since the elderly and children have relatively weak immunity and are more vulnerable to bacterial infections, such families are more willing to choose antibacterial ceramic tiles to reduce the risk of family members getting infected with diseases. If there are elderly people in the family who are bedridden for a long time, using antibacterial ceramic tiles in frequently used areas such as the bathroom can reduce the growth of bacteria and provide a healthier environment for the elderly; for families with children, when children play on the ground, antibacterial ceramic tiles can, to a certain extent, reduce the harm of bacteria to children.

[0048] People suffering from respiratory diseases or with allergic constitutions are more sensitive to bacteria, allergens, etc. in the living environment. Antibacterial ceramic tiles can reduce the growth of bacteria and microorganisms, and lower the risk of allergic reactions and the onset of respiratory diseases caused by the growth of bacteria. For asthma patients or people with easy allergies, using antibacterial ceramic tiles can reduce allergens and bacteria in the air, helping to relieve the condition and improve the quality of life.

[0049] In the existing technology, some technologies introduce a specific content of silver-loaded nano-titanium dioxide into the raw materials of the surface glaze layer and the surface wax film. Under the synergistic effect of the surface glaze layer and the surface wax film layer with a specific chemical composition after firing, a long-lasting and durable antibacterial effect can be achieved, while presenting an ideal marble texture and apparent texture effect.

[0050] Some antibacterial ceramic tiles successively include a body layer, a glaze layer, and a coating layer from bottom to top. The raw materials for preparing the glaze layer include porous silica-coated zinc oxide; the coating layer is formed by heat-curing a mixed solution containing silver nitrate solution, sodium citrate solution, and fluorine-containing compounds. Through this combination of structure and materials, the ceramic tiles have good overall antibacterial performance, antibacterial durability, and antifouling performance.

[0051] Some antibacterial ceramic tiles include a ceramic tile body and an antibacterial film. The antibacterial film is deposited on the upper surface of the ceramic tile body by magnetron sputtering technology using antibacterial powder. The raw materials for preparing the antibacterial powder include nano-zinc oxide and a modifier, and the modifier includes sodium polyacrylate and / or polyvinylpyrrolidone. This method can improve the adhesion between the antibacterial film and the ceramic tile body, thereby improving the antibacterial durability of the product.

[0052] Some technologies coat a suspension containing nano-antibacterial agent and silicone on the glaze layer of a glazed tile body, and heat-cure it to form an antibacterial functional layer. Without performing a polishing process, the antibacterial effect of the ceramic tile is achieved. At the same time, using silicone as a suspending agent for the nano-antibacterial agent, the nano-antibacterial agent, silicone, and the glaze layer react and cure, effectively preventing the shedding of the functional layer; and a zinc-based antibacterial material is selected to form a film with high transmittance, which will not affect the color development effect of the glaze layer.

[0053] Some technologies provide antibacterial solutions, antibacterial antique tiles and their preparation methods containing silver-based composite antibacterial agents. The antibacterial solution contains a silver-based composite antibacterial agent, a film-forming agent and an ultraviolet absorber. The silver-based composite antibacterial agent includes silver nitrate, silver citrate and silver acetate, and the film-forming agent includes a waterborne polyurethane resin and a waterborne polyacrylic resin. This antibacterial solution can achieve excellent and long-lasting bactericidal effects without affecting the original decorative pattern and matte decorative effect 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; during the high-temperature calcination process, the first photocatalyst and the second photocatalyst form a heterojunction, expanding the light response range of the first photocatalyst from the ultraviolet light region to the visible light region, greatly broadening the application range of antibacterial ceramic glazes and enhancing the antibacterial effect at the same time.

[0055] Some technologies add rare earth elements to ceramic materials. After high-temperature firing, the ceramics have antibacterial properties. 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 design the composition of the composite antibacterial agent and add the composite antibacterial agent to the reserved glaze. After firing, ceramic tiles with high-efficiency, stable and long-lasting antibacterial properties can be obtained, and the ceramic tiles can also maintain their due glaze appearance.

[0057] There are certain differences in the antibacterial properties of different brands and products, but the actual effects are difficult to directly compare due to different test standards and methods. Nevertheless, antibacterial ceramic tiles currently still have the problem of insufficient antibacterial durability. After multiple abrasions or cleanings, the antibacterial performance decreases significantly and cannot maintain a stable antibacterial effect for a long time; the antibacterial distance is limited, and the antibacterial effect can only be exerted when 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 strains are relatively single. The same antibacterial ceramic tile usually only has antibacterial activity against one or two strains, and the antibacterial spectrum is relatively narrow. In actual application scenarios, in the face of a complex and diverse microbial environment, it is difficult to meet the need to resist multiple strains at the same time, and the adaptability is poor.

[0058] Therefore, the existing technologies still have deficiencies in antibacterial durability, antibacterial types, and antibacterial distance. This application can improve the antibacterial performance and quality stability of products to meet the growing antibacterial needs of consumers and promote the wide application of antibacterial ceramic tiles in the modern home decoration market.

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

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

[0061] Step S200: Apply a pre-prepared specific underglaze to the surface of the ceramic green body to be treated to form an underglaze base layer. The specific underglaze is obtained by adding the ceramic powder to the underglaze;

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

[0063] Step S400: Apply a pre-prepared specific hot-melt sealing glaze on the dried dry particle layer. After obtaining a hot-melt sealing layer, fire it in a kiln to obtain an antibacterial ceramic tile. The specific hot-melt sealing glaze is obtained by adding the ceramic powder to the hot-melt sealing glaze.

[0064] Specifically, according to the set ratio, add the prepared ceramic powder to the underglaze and mix evenly to obtain a specific underglaze. The mixing ratio of the underglaze and the special ceramic powder is within a preset range. When the specific gravity of the underglaze is 1.45-1.78, 3-8 g of ceramic powder is added to 100 g of underglaze slurry. Adopt the spraying glaze process or the pouring glaze process to apply the specific underglaze on the surface of the ceramic tile green body to form an underglaze base layer. Use a digital inkjet printer to spray digital ceramic ink on the surface of the underglaze base layer to form a pattern decorative layer. Some designs will simultaneously spray digital functional bright and matte ceramic ink for decoration, and some designs will also simultaneously spray functional digital bright and matte shaping ink. The pattern decorative layer includes the decoration of color patterns, the pattern decoration of functional ceramic ink, and the texture decoration of shaping ink.

[0065] Use a dry particle machine to apply dry particle materials on the surface of the pattern decorative layer so that the shaping ink can bond with the dry particle materials, initially fix the dry particle materials, and form a dry particle layer; the exhaust fan sucks away the excess dry particle materials that are not shaped and bonded and can be recycled. Specifically, because the sprayed shaping ink has a certain gray scale and pattern texture, when the dry particles are scattered in the areas where the shaping ink is not sprayed, the dry particles are still in a loose state and cannot bond and fix with the surface of the brick blank. Therefore, under the suction of the exhaust fan, the dry particles that are not bonded and fixed become excess dry particles and are sucked away for recycling.

[0066] Enter the drying kiln for preliminary drying to make the fixed - form ink bond more firmly with the dry particles on the surface, further fix the preliminarily formed dry - particle layer, and stabilize the preliminarily formed pattern. Spray a specific hot - melt sealing glaze on the surface of the brick blank carrying the dry - particle layer to form a hot - melt sealing layer. The specific hot - melt sealing glaze refers to the glaze obtained by using the prepared ceramic powder and mixing it evenly with the original hot - melt sealing glaze slurry used in production according to a certain proportion. For example, for the hot - melt sealing glaze, 100 g with a specific gravity of 1.78, 2 g of ceramic powder, and the glazing amount is 360 ± 3 g / m 2 ; for the hot - melt sealing glaze, 100 g with a specific gravity of 1.78, 3 g of special ceramic powder, and the glazing amount is 420 ± 3 g / m 2 .

[0067] Enter the kiln for firing to obtain antibacterial ceramic tiles with broad - spectrum and strong antibacterial properties. In the embodiments of this application, the firing system does not need to be specially adjusted and has the same firing system as the products produced by the existing hot - melt sealing glaze technology. The specific flow chart is as Figure 2 shown.

[0068] The ceramic powder provided by the present invention can be used for the base glaze. The ceramic powder is obtained by solid - phase reaction from a specific raw material formula, and its raw materials include high - sodium feldspar, calcined talc, silica powder and other components. The made ceramic tiles utilize the far - infrared wave antibacterial principle and have the advantages of long - distance antibacterial, broad - spectrum antibacterial, and strong antibacterial durability. They can effectively inhibit a variety of common harmful bacteria, such as Escherichia coli, Staphylococcus aureus, etc. The antibacterial rate can reach more than 99%, and still maintain high antibacterial ability after 500 times of abrasion and washing. At the same time, the ceramic tiles are safe, environmentally friendly, and have stable physical properties, combining decoration and functionality, and can be widely used in multiple fields such as home, medical, and public.

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

[0070] Table 1

[0071]

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

[0073] In an embodiment of this application, the chemical components of the ceramic powder, 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, by mass percentage, include: Na2O 2.42%, MgO 2.48%, Al2O3 45.82%, SiO2 41.24%, B2O3 5.56%, La2O3 0.79%.

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

[0077] 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%.

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

[0079] In the embodiment of the present application, the preparation method of the ceramic powder includes:

[0080] Step S100: Mix 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 fire them to prepare a pre - fired formula material;

[0081] Step S200: Grind the pre - fired formula material to obtain a pre - fired powder;

[0082] Step S300: Mix the pre - fired powder and the ceramic glaze powder and then calcine them to obtain a calcined material;

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

[0084] The ceramic powder prepared by the present invention is a ceramic powder similar to tourmaline. Tourmaline is a mineral with piezoelectricity and pyroelectricity. Tourmaline ceramics made by combining tourmaline with ceramic technology can emit far - infrared rays. When tourmaline ceramics are heated or stimulated by external stimuli such as pressure, the ions in their crystal structure will displace, resulting in a change in the dipole moment, thereby generating an electric field and emitting far - infrared rays with a wavelength of 4 - 16 μm.

[0085] The tourmaline ceramics on the market are mainly prepared from natural tourmaline materials. The resources of natural tourmaline materials are limited. With the increase in the mining volume, high-quality natural tourmaline ore sources are gradually decreasing, and the cost is rising. Moreover, the purity and quality of natural tourmaline vary greatly. Tourmalines from different origins and different veins have differences in chemical composition and physical properties, and strict screening and grading are required to ensure the stability of product quality. It is difficult to control the balance between the use content and the ceramic properties, resulting in unstable performance. To fully exert the function of emitting far-infrared rays of tourmaline ceramics, it is necessary to appropriately increase the content of tourmaline. However, adding too much will affect the sintering performance of the ceramic tiles, resulting in defects such as cracks in the products, which requires very high requirements for the production process and formula design. The functional durability of natural tourmaline ceramics is poor. Although it theoretically has the function of emitting far-infrared rays, in actual use, affected by factors such as time, use environment, and cleaning, these functions will gradually weaken, and it is difficult to ensure stable performance for a long time. The present invention can add ceramic powder to both the base glaze and the surface glaze at the same time, so that even if the surface 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-fired powder, calculated by mass percentage, include: high sodium feldspar 31%, calcined talc 15%, corundum powder 23%, silica powder 12%, boron oxide 11%, calcined clay 8%.

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

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

[0089] In an embodiment of the present application, calculated by mass percentage, before 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 and firing to prepare the pre-fired formula material, it further includes: pulverizing and grinding the corundum powder and the silica powder so that the D50 of the corundum powder and the silica powder is controlled at 1-3 μm.

[0090] Specifically, crush and grind corundum powder and silica fume for the first time, and control D50 within 1 - 3 μm. Weigh and proportion the ingredients according to the formula of 25 - 31% of high - sodium feldspar, 11 - 15% of calcined talc, 20 - 24% of corundum powder, 11 - 18% of silica fume, 4 - 12% of boron oxide, and 6 - 8% of calcined clay, and mix them evenly. Pre - burn the evenly - mixed formulated materials; crush and grind the product after pre - burning for the second time to obtain pre - burned powder; mix the pre - burned powder and ceramic glaze powder evenly in proportion and put them into a high - temperature furnace for calcination; crush and grind the calcined materials for the third time to obtain special ceramic powder for standby.

[0091] The raw materials used in the present invention have high fineness requirements, and D50 is controlled at the sub - micron level of 1 - 3 μm. After processing the materials containing rare - earth elements of lanthanum oxide into the sub - micron level, the specific surface area and the proportion of surface atoms of the materials can be increased, making the coordination environment of surface atoms different from that of bulk atoms, thus changing the crystal - field environment, which may affect the energy levels and transitions of electrons and improve the infrared emission efficiency.

[0092] In the embodiment of the present application, the raw materials of the hot - melt plastic - sealing glaze, by weight percentage, include: 2 - 3% of corundum powder, 1 - 2% of ball clay, 2 - 5% of washed kaolin, 0 - 3% of quartz powder, 65 - 85% of glass powder, and 15 - 24% of frit powder. The chemical components of the hot - melt plastic - sealing glaze, by weight percentage, include: 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 balance is impurities.

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

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

[0095] Loss on ignition 0.51%, Al2O3 97.37%, SiO2 1.12%, Fe2O3 0.08%, CaO 0.09%, MgO 0.13%, K2O 0.1%, Na2O 0.4%, and the balance is impurities;

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

[0097] Loss on ignition 12.08%, Al2O3 31.18%, SiO2 53.72%, Fe2O3 0.87%, CaO 0.19%, MgO 0.1%, K2O 0.19%, Na2O 0.28%, with the balance being impurities;

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

[0099] Loss on ignition 11.49%, Al2O3 35.46%, SiO2 49.45%, Fe2O3 1.05%, CaO 0.13%, MgO 0.11%, K2O 1.8%, Na2O 0.05%, with the balance being impurities;

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

[0101] Loss on ignition 0.8%, Al2O3 3.35%, SiO2 94.33%, Fe2O3 0.13%, CaO 0.04%, MgO 0.13%, K2O 0.84%, Na2O 0.09%, with the balance being impurities;

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

[0103] Loss on ignition 1.86%, Al2O3 22.55%, SiO2 55.11%, Fe2O3 0.14%, CaO 8.63%, MgO 5.05%, K2O 3.08%, Na2O 2.93%, ZnO 0.1%, with the balance being impurities;

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

[0105] Loss on ignition 3.11%, Al2O3 14.42%, SiO2 48.72%, Fe2O3 0.13%, CaO 0.73%, MgO 0.96%, K2O 0.42%, Na2O 1.75%, BaO 22.72%, ZnO 6.56%, with the balance being impurities.

[0106] The present invention develops raw material formulas, finely processes raw materials, optimizes the raw material ratio and preparation process, so that the prepared calcined functional materials are evenly dispersed in the matrix of the ceramic glaze, and a specific microstructure is formed after high-temperature firing, which is conducive to generating stable far-infrared waves. During the preparation process of the ceramic tile, through processes such as high-temperature sintering, the functional material interacts with the ceramic matrix to form the characteristic of continuously emitting far-infrared waves at room temperature. The far-infrared waves have the characteristic that their vibration frequencies are similar to those of biomolecules of various bacteria. When the far-infrared waves act on bacteria, they can cause the resonance of biomolecules inside the bacteria, destroying the cell structure, protein synthesis and metabolic processes of the bacteria, thereby achieving the antibacterial purpose. The far-infrared emissivity of the sample of the present invention reaches 0.863 in the range of 8μm - 14μm. The far-infrared emissivity of ordinary building ceramic tiles is usually between 0.70 and 0.85, depending on the material composition and process. Generally, it is considered that the emissivity of functional far-infrared ceramic tiles reaches above 0.85, indicating a significant antibacterial effect, and it can be called a medical-grade antibacterial ceramic tile. The far-infrared emissivity of the technology of the present invention reaches 0.863, having a significant antibacterial effect.

[0107] The present invention finely processes and treats the functional material, and adopts a multi-layer ceramic glaze encapsulation technology to make it firmly combined inside the ceramic tile and not easily affected by external factors such as abrasion, washing and wiping. At the same time, the surface of the ceramic tile is strengthened to improve its wear resistance and corrosion resistance, further protecting the far-infrared wave-emitting functional material inside the ceramic tile glaze and ensuring long-term stable antibacterial performance.

[0108] Far-infrared waves generally refer to far-infrared rays, which are the longest wavelength segment in infrared rays and are an invisible light. Generally, far-infrared rays with a wavelength in the range of 4 - 16μm are called "life light waves". It is a kind of light wave and electromagnetic wave, which has the property of absorption while penetrating and can be absorbed by living organisms. The normal absorption and emission of far-infrared life light waves will cause the molecules of the living organism itself to produce resonance resonance movements, promoting the activation of water molecules in the living organism.

[0109] Far-infrared rays have a certain antibacterial function. Far-infrared irradiation can increase the temperature of the irradiated object, generating a thermal effect. For bacteria, the temperature range suitable for the growth of most bacteria is relatively fixed. For example, many pathogenic bacteria grow and reproduce more vigorously at about 37°C. When the thermal effect generated by far-infrared rays makes the environmental temperature exceed the range suitable for the growth of bacteria, the growth and reproduction rate of bacteria will be inhibited. This effect has been applied in the disinfection process of some medical equipment. By using a far-infrared heating device to raise the temperature to a certain level and maintain it for a certain period of time, the number of bacteria on the surface of the object can be effectively reduced, and the physiological structure and metabolic process of bacteria can be destroyed through high temperature.

[0110] Far-infrared rays can cause molecular vibrations within bacterial cells, disrupting the bacterial structure. The cell structure of bacteria includes the cell wall, cell membrane, etc., and these structures are crucial for the survival of bacteria. The energy of far-infrared rays can cause the molecular bonds in the bacterial cell wall and cell membrane to vibrate, and when the energy is high enough, these molecular bonds will break. Some studies have found that high-intensity far-infrared irradiation can damage the peptidoglycan structure in the bacterial cell wall. Peptidoglycan is one of the main components of the bacterial cell wall, and its damage will cause the bacterial cell to lose its integrity, resulting in the leakage of its contents and ultimately the death of the bacteria. At the same time, the damage to the cell membrane will also affect the material exchange and energy metabolism functions of bacteria, further leading to the inactivation of bacteria.

[0111] The normal metabolism of bacteria depends on the catalytic action of various enzymes, and enzymes are proteins with specific spatial structures. The energy of far-infrared rays may change the molecular structure of enzymes, rendering them inactive. Since the respiratory process of bacteria requires the participation of multiple enzymes, when these enzymes are inactivated by far-infrared rays, the respiratory metabolism of bacteria will be hindered, and thus they cannot generate enough energy to maintain their life activities.

[0112] Of course, the antibacterial effect of far-infrared rays is affected by various factors, such as the wavelength, intensity, irradiation time of far-infrared rays, as well as the type, quantity, and environment of bacteria. Therefore, in the research on the technology of broad-spectrum and highly effective antibacterial ceramic tiles, considering that far-infrared antibacterial is affected by various factors, repeated experiments and demonstrations have been carried out in terms of raw material preparation process, application method, process method, dosage, etc., in order to achieve a better antibacterial effect.

[0113] The antibacterial ceramic tiles of the present invention have excellent antibacterial properties, including: First, long-distance antibacterial. Different from traditional surface-contact antibacterial ceramic tiles, far-infrared wave antibacterial ceramic tiles can achieve effective antibacterial within a certain spatial distance range. The far-infrared waves can propagate into the surrounding space and inhibit and kill bacteria within a certain distance from the surface of the ceramic tiles. Through the observation of the fresh milk deterioration experiment, the antibacterial distance can exert antibacterial effects within the range of several centimeters to dozens of centimeters, thus effectively expanding the antibacterial space range, being able to better actively prevent and control bacteria in the surrounding environment, and reducing the risk of bacteria transmission in the space. Second, broad-spectrum antibacterial property. It has high antibacterial activity against a variety of common harmful bacterial species, such as Escherichia coli, Staphylococcus aureus, Candida albicans, Pseudomonas aeruginosa, etc., and the antibacterial rate can reach over 99%. The frequency of the far-infrared waves is similar to the biomolecular vibration frequencies of various bacteria, which can cause resonance of the biomolecules inside the bacteria, and then disrupt the cell structure, protein synthesis, and metabolic processes of the bacteria, achieving broad-spectrum antibacterial, being able to effectively cope with complex microbial environments, and being widely applicable to various places such as hospitals, food processing workshops, household kitchens, and bathrooms. Third, strong antibacterial durability. It can still maintain the initial antibacterial ability after long-term grinding, washing, and wiping. This is because its antibacterial function does not rely on antibacterial agents coated on the surface that are prone to shedding or failure, but through the design of special material combinations and processes, enabling the ceramic tiles to stably emit far-infrared waves to achieve antibacterial. According to the antibacterial durability performance test of GB / T9266, using sodium hypochlorite disinfectant with a concentration of 5% as the scrubbing solution, after 500 grinding and washing operations on the antibacterial ceramic tiles of the present invention, its antibacterial ability can still maintain over 99% of the initial level (the standard requirement is ≥85%), and even can still reach over 99.99%, significantly superior to existing antibacterial ceramic tile products, and can continuously and stably play an antibacterial role throughout the service life cycle of the ceramic tiles.

[0114] The antibacterial ceramic tiles of the present invention have high safety and environmental protection, specifically including: First, no harmful substance release. The far-infrared wave antibacterial ceramic tiles do not need to add antibacterial agents such as silver ions that may pose potential hazards to the human body or the environment during the antibacterial process, nor do they have the radiation risk generated by ultraviolet light excitation like some photocatalytic antibacterial ceramic tiles. No harmful substances will be released during use, being friendly to human health and the environment. Second, meeting environmental protection standards. Environmental protection is also emphasized during the production process. 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., without harmful substances.

[0115] The physical properties of the antibacterial ceramic tiles of the present invention are stable, specifically including: First, high hardness and wear resistance. It has hardness and wear resistance equivalent to or even better than ordinary ceramic tiles, can withstand various frictions and scratches in daily use, is not prone to scratches and wear, and maintains the integrity and beauty of the tile surface, thereby ensuring that its antibacterial performance is not affected during long-term use, and at the same time extending the service life of the ceramic tiles. Second, good corrosion resistance. It has good corrosion resistance to common chemical substances, is not easily eroded by chemical substances such as acids and alkalis, and can be stably used in places with different chemical environments. For example, in kitchens, bathrooms and other places where chemical substances such as cleaning agents are often contacted, it can still maintain good performance.

[0116] The antibacterial ceramic tiles of the present invention combine decorative and functional properties, specifically including: First, rich decorative effects. In terms of appearance, the far-infrared wave antibacterial ceramic tiles have rich decorative effects similar to traditional ceramic tiles. Through different designs of colors, patterns, textures, etc., they can meet various decoration styles and personalized needs, and can not only achieve the antibacterial function but also play a role in beautifying 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, further improving the environmental protection performance and use value of the ceramic tiles, and creating 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 during long-term use, even after multiple grinding, washing and wiping, it can still maintain stable and efficient antibacterial performance.

[0119] Second, it breaks through the limitation that traditional antibacterial ceramic tiles only play an antibacterial role in surface contact or at close range, realizes effective antibacterial within a certain spatial distance range, expands the antibacterial space range, and actively prevents bacteria in the surrounding environment.

[0120] Third, it solves the problem of single antibacterial strain, enables the ceramic tiles to have broad-spectrum antibacterial properties, and can produce high antibacterial activity against a variety of common harmful bacterial strains to adapt to the complex microbial environment in different application scenarios.

[0121] Specific embodiments are listed below for illustration.

[0122] Example 1

[0123] First, select an existing ceramic tile body formed by a mature process. This body meets the quality requirements of conventional ceramic tile bodies in terms of basic properties such as size and strength. Next, select a bottom glaze that is compatible with the selected ceramic tile body. The characteristics of this bottom glaze can ensure that during the subsequent firing process, the ceramic tile will not have problems such as excessive deformation and poor thermal shock resistance. Then, prepare a special ceramic powder.

[0124] Perform the first crushing and grinding operation on corundum powder and silica powder, and control its D50 within the range of 1 - 3 μm. Weigh and mix the raw materials according to the mass percentage of the raw material formula of the special ceramic powder, that is, 31% high sodium feldspar, 15% calcined talc, 23% corundum powder, 11% silica powder, 11% boron oxide, and 8% calcined clay. Mix these raw materials thoroughly. Carry out pre-firing treatment on the uniformly mixed formula material. The pre-firing temperature is 700 °C, and the pre-firing time is 2 hours. After the pre-firing is completed, perform the second crushing and grinding on the product to obtain a pre-fired powder, and its chemical composition mass percentages are Na2O 3.45%, MgO 4.77%, Al2O3 31.88%, SiO2 46.46%, and B2O3 10.82% respectively.

[0125] Then, mix the pre-fired powder and ceramic glaze powder evenly at a ratio of 1:1, put them into a high-temperature furnace for firing. The firing temperature is 1000 °C, and the firing time is 3 hours. Finally, perform the third crushing and grinding on the fired material to obtain a special ceramic powder for standby. Here, the ceramic glaze powder is a ceramic powder containing rare earth lanthanum element, and its chemical composition is: 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 100 g of the selected bottom glaze, and its specific gravity is 1.73; add 6 g of special ceramic powder to the bottom glaze, mix evenly and adjust the specific gravity to 1.50. Spray the bottom glaze containing special ceramic powder on the surface of the tile body, and the glazing amount is 470 ± 3 g / ㎡ to form a bottom glaze base layer. Use a digital inkjet printer to spray decorative patterns on the surface of the bottom glaze base layer, including conventional color pattern decoration, pattern decoration with functional ceramic ink, and texture decoration with shaping ink.

[0127] According to the prior art, on the surface of the brick blank sprayed with digital shaping ink, dry granule materials are spread by a dry granulator in a dry process. Due to the effect of the shaping ink, the dry granule materials can adhere to it, initially fixing the dry granule materials to form a dry granule layer. During this process, because the sprayed shaping ink has a specific gray scale and pattern texture, when the dry granules are spread in the area where the shaping ink has not been sprayed, the dry granules are in a loose state and cannot adhere to and be fixed on the surface of the brick blank. Therefore, with the suction of a suction fan, these redundant dry granules that have not been adhered and fixed are sucked away and recycled for subsequent reuse.

[0128] The surface is dried, aiming to make the adhesion between the shaping ink and the dry granules on the surface more firm and further stabilize the initially formed pattern.

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

[0130] Example Two

[0131] The ceramic brick blank also selects products formed by an existing mature process of pressing. Its quality standard is the same as that of the blank in Example One. The preparation process of the special ceramic powder is similar to that in Example One, and the mass percentage of the raw material formula is also 31% high-sodium feldspar, 15% calcined talc, 23% corundum powder, 11% silica powder, 11% boron oxide, and 8% calcination. After a series of process steps such as the same crushing, grinding, pre-firing, and mixed calcination, the special ceramic powder is obtained.

[0132] The selection of the bottom glaze also matches the blank. The bottom glaze weighs 100 g and has a specific gravity of 1.78. This time, the bottom glaze containing special ceramic powder is applied to the surface of the ceramic brick blank by a glazing process, and the glazing amount is 420 ± 3 g / ㎡ to form a bottom glaze base layer. The operation of inkjetting decorative patterns is carried out on the surface of the bottom glaze base layer, including color patterns, functional ceramic ink patterns, and shaping ink texture decoration. This step is the same as that in Example One.

[0133] The subsequent steps of dry particle layer preparation, surplus dry particle recovery, drying treatment, etc. are all the same as those in Example 1.

[0134] The raw material composition of the special hot-melt plastic-sealed glaze slurry is the same as that in Example 1, namely, corundum powder 2.8%, ball clay 1.8%, washed kaolin 3.6%, quartz powder 1.8%, glass powder 72%, and fritted powder 18%. Weigh 100 g of the hot-melt plastic-sealed glaze slurry with a specific gravity of 1.78, mix it evenly with 3 g of the special ceramic powder, and adjust the specific gravity to 1.40. Spray it on the surface of the brick blank with a dry particle layer, and the glaze spraying amount is 330 ± 3 g / ㎡ to form a hot-melt plastic-sealed layer. Finally, put the brick blank into the kiln for firing, and the firing kiln system is the same as that for the products produced by the existing hot-melt plastic-sealed glaze technology to obtain the far-infrared wave antibacterial ceramic brick.

[0135] The antibacterial and durability tests prove that the ceramic brick obtained by the present invention has high durability and antibacterial effects on multiple bacteria species.

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

[0137] Table 2

[0138]

[0139] Example 2 adopts the industry standard JCT 897-2014 "Antibacterial Properties 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 brick of the present invention has achieved remarkable effects in terms of long-distance 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 brick, wherein the antibacterial ceramic brick is prepared by the antibacterial ceramic brick 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 especially provide a healthier and safer home, medical, public activity and other environments for people with weaker immunity such as the elderly, children, and patients, as well as those who pay attention to the quality of healthy life. It is applicable to 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, meeting room, etc.), etc., to meet the antibacterial function requirements of different places and improve the overall environmental hygiene level. Due to its strong antibacterial durability, it reduces the frequency of replacing ceramic tiles due to the decline of antibacterial performance and reduces the long-term use cost; and the production process is environmentally friendly, and no harmful substances are released during use, which conforms to the concept of sustainable development and is beneficial to environmental protection. While having excellent antibacterial performance, it maintains good decorative properties, can be adapted to a variety of decoration styles, and improves the space quality and use comfort.

[0146] The present invention provides a method for preparing antibacterial ceramic tiles and antibacterial ceramic tiles. The method for preparing the antibacterial ceramic tiles includes: preparing ceramic powder, and 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 fume, 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 the ceramic green body to be treated to form a base glaze layer, and the specific base glaze is obtained by adding the ceramic powder to the base glaze; inkjet decorating a pattern on the surface of the base glaze layer to form a pattern decoration layer, spreading 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 sealing glaze on the dried dry particle layer, obtaining a hot melt sealing layer and then firing in a kiln to obtain the antibacterial ceramic tile, and the specific hot melt sealing glaze is obtained by adding the ceramic powder to the hot melt sealing glaze. By adding ceramic powder capable of generating far-infrared waves to the base glaze and the specific hot melt sealing glaze, the present invention enables the ceramic powder to interact with the ceramic matrix, forming the characteristic of continuously emitting far-infrared waves at normal temperature. The ceramic powder and the ceramic matrix are firmly combined inside the ceramic tile, and even if the surface glaze is worn, it does not affect the stability and durability of the product performance, and thus can maintain stable and efficient antibacterial performance.

[0147] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A method for preparing an antibacterial ceramic tile, 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% of high sodium feldspar, 3-8% of calcined talc, 5-12% of corundum powder, 2-6% of silicon powder, 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 the 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, apply dry particles on the pattern decoration layer to form a dry particle layer, and dry the dry particle layer; A pre-prepared specific hot-melt plastic sealing glaze is applied on the dry dry particle layer to obtain a hot-melt plastic sealing layer, which is then fired 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.

2. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The chemical components of the ceramic powder, measured by mass percentage, include: Na2O 1.5~3%, MgO 1~3.5%, Al2O3 40~55%, SiO2 37~44%, B2O3 2~8%, La2O30.4~1.5%.

3. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The chemical components of the ceramic glaze powder, measured 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%, MgO 0~0.1%, K2O 1~2%, Na2O 1~2%, BaO 0~0.02%, La2O3 1.5~2%.

4. The method for preparing antibacterial ceramic tiles according to claim 1, characterized in that: The preparation method of the ceramic powder comprises: According to mass percentage, 25-31% of high sodium feldspar, 11-15% of calcined 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 calcined to prepare a pre-calcined formula material; Grinding the pre-fired formula material to obtain a pre-fired powder; The pre-fired powder and the ceramic glaze powder are mixed and then calcined to obtain a calcined material; The calcined material is ground to obtain ceramic powder.

5. The method for preparing the antibacterial ceramic tile according to claim 4, characterized in that: The chemical components of the pre-burned powder, measured by mass percentage, include: Na2O 2.5~4%; MgO 3~5%; Al2O3 26~34%; SiO2 38~54%; B2O3 3.5~12%.

6. The method for preparing the antibacterial ceramic tile according to claim 4, characterized in that: By mass percentage, 25-31% of high sodium feldspar, 11-15% of calcined talc, 20-24% of corundum powder, 11-18% of silicon powder, 4-12% of boron oxide, and 6-8% of calcined clay are mixed and sintered to prepare the pre-sintered formula material, which also includes: 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.

7. The method for preparing the antibacterial ceramic tile according to claim 1, characterized in that: 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%.

8. 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%, K2O 2.41%, Na2O 2.46%, BaO 4.11%, ZnO 1.19%, and the remainder is impurities.

9. The method for preparing the antibacterial ceramic tile according to claim 7, 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%, K2O 0.1%, Na2O 0.4%, the remainder 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%, K2O 0.19%, Na2O 0.28%, the remainder 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%, MgO0.11%, K2O 1.8%, Na2O 0.05%, the remainder 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%, K2O 0.84%, Na2O 0.09%, the remainder 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%, K2O 3.08%, Na2O 2.93%, ZnO 0.1%, the remainder is impurities; The chemical components of the frit powder in the hot melt plastic sealing glaze include, by weight percentage: Loss on ignition 3.11%, Al2O3 14.42%, SiO2 48.72%, Fe2O3 0.13%, CaO 0.73%, MgO 0.96%, K2O 0.42%, Na2O 1.75%, BaO 22.72%, ZnO 6.56%, and the remainder is impurities.

10. 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 9.

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