Sanitary ceramic glaze as well as preparation method and application thereof

Abstract

The invention relates to the technical field of ceramics, in particular to sanitary ceramic glaze as well as a preparation method and application thereof. The sanitary ceramic glaze is prepared from the following chemical components in percentage by mass: 58.6%-63.6% of SiO2, 6%-11% of Al2O3, 10%-15% of CaO, 1%-5% of MgO, 0.05%-2% of Fe2O3, 0.02%-1.2% of TiO2, 11%-16% of K2O and 0.9%-5% of Na2O, wherein the sum of the mass percentages of all the chemical components is 100%. The sanitary ceramic glaze provided by the invention has high hardness, excellent easy-to-clean and antibacterial properties and antibacterial rate gt; the durability is remarkably improved, the market requirement of high-end sanitary ware is met, and meanwhile, the defects that in an existing sanitary ceramic glaze technology, the surface smoothness is insufficient, the antibacterial property is not lasting, and the easy-to-clean property and the antibacterial property are mutually restricted are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramics, and in particular to a sanitary ceramic glaze, a preparation method thereof and an application thereof. Background Art

[0002] Ceramic glazes are key coatings on the surfaces of sanitary ware such as toilets and washbasins, and their performance directly impacts the user experience and sanitation of these items. Traditional ceramic glazes primarily focus on decorative properties and basic antifouling properties, but with rising health awareness, market demand has surged for glazes that are ultra-smooth, easy to clean, and antibacterial. Currently, sanitary ceramics prepared using traditional glazes generally suffer from problems such as a loose surface microstructure, short-lived antibacterial properties, and difficulty balancing glaze hardness and smoothness. Traditional silver-based antimicrobial agents, in particular, are prone to discoloration of the glaze, limiting their application. Summary of the Invention

[0003] To address the problems of the prior art, the present invention provides a sanitary ceramic glaze, a preparation method, and applications thereof. The sanitary ceramic glaze of the present invention is made of the following chemical components in percentage by mass: SiO2 58.6% to 63.6%, Al2O3 6% to 11%, CaO 10% to 15%, MgO 1% to 5%, Fe2O3 0.05% to 2%, TiO2 0.02% to 1.2%, K2O 11% to 16%, and Na2O 0.9% to 5%, totaling 100%. The sanitary ceramic glaze provided by the present invention not only has high hardness but also excellent easy-to-clean and antibacterial properties, with an antibacterial rate exceeding 99% and significantly improved durability. Furthermore, by optimizing the preparation process, the production cost is reduced by approximately 30%, meeting the market demand for high-end sanitary ware and overcoming the shortcomings of existing sanitary ceramic glaze technologies, such as insufficient surface smoothness, short-lived antibacterial performance, and the mutual restriction between easy-to-clean and antibacterial properties.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A first object of the present invention is to provide a sanitary ceramic glaze, which is made of the following chemical components in mass percentage: SiO2 58.6% to 63.6%, Al2O3 6% to 11%, CaO 10% to 15%, MgO 1% to 5%, Fe2O3 0.05% to 2%, TiO2 0.02% to 1.2%, K2O 11% to 16%, and Na2O 0.9% to 5%, and the sum of the mass percentages of the chemical components is 100%.

[0005] Preferably, the sanitary ceramic glaze is made of the following chemical components in mass percentage: SiO2 59.64%~61.78%, Al2O3 8.62%~9.50%, CaO 12.45%~13.10%, MgO 2.42%~3.80%, Fe2O3 0.10%~1.25%, TiO2 0.09%~0.75%, K2O 7.09%~8.55%, Na2O 1.98%~3.75%, and the sum of the mass percentages of each chemical component is 100%.

[0006] Preferably, the internal radiation index of the sanitary ceramic glaze is 0.1-0.3, and the external radiation index is 0.2-0.4.

[0007] More preferably, the internal radiation index of the sanitary ceramic glaze is 0.154-0.174, and the external radiation index is 0.289-0.324.

[0008] Preferably, the sanitary ceramic glaze is passed through a 180-mesh sieve.

[0009] A second object of the present invention is to provide a method for preparing the above-mentioned sanitary ceramic glaze, comprising the following steps: S1. Mix 25 to 28 parts of quartz powder, 35 to 38 parts of feldspar powder, 11 to 18 parts of talc, 8 to 10 parts of light calcium carbonate, 5 to 8 parts of acid thorn ditch soil, 4 to 6 parts of left cloud soil, 7 to 9 parts of zinc oxide, and 5 to 6 parts of zirconium silicate, by weight, and perform a melting treatment at 1400°C to 1600°C. After water quenching, the mixture is dried to obtain a frit.

[0010] S2. Mixing the frit and water, and performing a first ball milling process to obtain a frit slurry.

[0011] S3. Mix the frit slurry, kaolin, water and sodium carbonate, and perform a second ball milling process. After screening, a sanitary ceramic glaze is obtained.

[0012] Preferably, the mass ratio of frit to water is 9-10:4-5.

[0013] Preferably, the mass ratio of frit, kaolin, water and sodium carbonate is 380-400:20-22:200-250:0.5-0.8.

[0014] Preferably, the particle size distribution of the frit slurry is: D 50 5.45µm, D 90 14.82µm, D 95 The particle size is 17.73µm, and the proportion of particles with a particle size less than 3.5µm is no less than 34.33%.

[0015] Preferably, the melt treatment conditions are: keeping the temperature at 1550° C. to 1600° C. for 20 min to 30 min.

[0016] Preferably, the first ball milling treatment is performed at a speed of 500 rad / min to 600 rad / min for 1.5 h.

[0017] Preferably, the second ball milling treatment is performed at a speed of 550 rad / min to 600 rad / min for 20 min.

[0018] Preferably, the particle size D of quartz powder and feldspar powder is 90 The particle size range is 8µm~10µm. Under the premise that the quartz powder and feldspar powder are fully melted under the optimal processing temperature conditions, the feldspar powder and quartz powder are just wrapped together, and micro-defect particles are formed after cooling, which ultimately improves the hardness of the glaze layer, enhances the wear resistance of the antibacterial sanitary ceramics, and prolongs the attenuation period of the antibacterial sanitary ceramics.

[0019] The third object of the present invention is an antibacterial sanitary ceramic, which is made using the above-mentioned sanitary ceramic glaze; the sanitary ceramic glaze is sprayed on the surface of the ceramic body and fired to form a glaze surface to obtain the antibacterial sanitary ceramic.

[0020] Preferably, the firing conditions are: firing at 1220° C. to 1230° C. for 18 h to 20 h.

[0021] Preferably, the spraying amount of sanitary ceramic glaze is 0.01g / cm 2 ~0.028g / cm 2 Below this range, there is basically no antibacterial and anti-fouling effect, and there is no obvious difference from white glaze; above this range, the glaze surface is very likely to crack during drying and firing, and there will be obvious color difference, affecting the overall beauty of the product.

[0022] Preferably, the ceramic body is also sprayed with white glaze before spraying the sanitary ceramic glaze. The thickness of the white glaze coating is 0.3mm~0.5mm. This range is the best parameter obtained by the industry through long-term accumulation. If it is too thin, the whiteness cannot meet the requirements and the quality is affected. If it is too thick, it will increase the cost and increase the pinhole defects, reduce the gloss and stain resistance.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a sanitary ceramic glaze, comprising the following chemical components in percentage by mass: SiO₂ 58.6% to 63.6%, Al₂O₃ 6% to 11%, CaO 10% to 15%, MgO 1% to 5%, Fe₂O₃ 0.05% to 2%, TiO₂ 0.02% to 1.2%, K₂O 11% to 16%, and Na₂O 0.9% to 5%, with the sum of the percentages by mass of the chemical components being 100%. When applied to ceramic bodies, the sanitary ceramic glaze of the present invention not only significantly improves the surface smoothness of the ceramic bodies and reduces stain adhesion, but also exhibits lower residual levels in oily ink stain resistance tests. Furthermore, the glaze surface whiteness can consistently reach a value exceeding 75 (white glaze whiteness 82), and its radioactivity index (internal radiation index ≤ 0.154, external radiation index ≤ 0.289) complies with the GB6566-2010 standard, ensuring safety and environmental protection.

[0024] 2. The present invention provides a method for preparing a sanitary ceramic glaze: 25 to 28 parts by weight of quartz powder, 35 to 38 parts of feldspar powder, 11 to 18 parts of talc, 8 to 10 parts of light calcium carbonate, 5 to 8 parts of acid thorn ditch soil, 4 to 6 parts of left cloud soil, 7 to 9 parts of zinc oxide, and 5 to 6 parts of zirconium silicate are mixed, melted at 1400° C. to 1600° C., quenched with water, and then dried to obtain a frit; the frit is mixed with water and subjected to a first ball milling treatment to obtain a frit slurry; the frit slurry, kaolin, water, and sodium carbonate are mixed, ball milled for a second time, sieved, and then red ink is added to obtain a sanitary ceramic glaze. Among them, the purpose of the first ball milling is to process the frit to D50 of 4µm~6µm and D90 of 10µm~20µm, so as to ensure that it can be fully melted and have good fluidity during the firing process of antibacterial sanitary ceramics, and then fill the pores formed by the white glaze; the second ball milling is to make the frit and kaolin evenly mixed, to ensure that the frit has stable suspension during actual use.

[0025] 3. Compared with the existing Toto and Jomoo antibacterial sanitary ceramics on the market, the antibacterial sanitary ceramics prepared using the sanitary ceramic glaze of the present invention have an ultra-smooth glaze surface, are easier to clean, have excellent antibacterial effects, and have the advantage of high whiteness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the particle size distribution diagram of the frit slurry of Example 1. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solution of the present invention in conjunction with the data in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that the professional terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention. Unless otherwise specified, the various raw materials, reagents, instruments and equipment used in the following embodiments of the present invention can be purchased from the market or prepared by existing methods.

[0029] In the existing technology, sanitary ware made of traditional ceramic glazes generally have the following problems: the glaze microstructure is not dense, stains are easily retained, the antibacterial performance is short-lived and easily causes the glaze to discolor (especially when using silver-based antibacterial agents), and it is difficult to simultaneously achieve high glaze hardness and ultra-smooth surface.

[0030] In response to the problems existing in the above-mentioned prior art, the present invention provides a sanitary ceramic glaze, characterized in that the sanitary ceramic glaze is made of the following chemical components in mass percentage: SiO2 58.6%~63.6%, Al2O3 6%~11%, CaO 10%~15%, MgO 1%~5%, Fe2O3 0.05%~2%, TiO2 0.02~1.2%, K2O 11%~16%, Na2O 0.9%~5%, and the sum of the mass percentages of each chemical component is 100%.

[0031] This invention combines zinc, silver, and rare earth antimicrobial particles with quartz, feldspar, and clay to form a frit (a glassy substance). The frit's fineness is reduced to a D90 of less than 20 microns (compared to a conventional 325-mesh sieve), improving fluidity and smoothing uneven white glaze surfaces. Furthermore, increasing the aluminum content in the sanitary ceramic glaze enhances the glaze's wear and corrosion resistance. The resulting sanitary ceramic glaze not only exhibits high hardness but also excellent cleanability and antimicrobial properties, with an antimicrobial rate exceeding 99% and significantly improved durability. Furthermore, through an optimized preparation process, production costs are reduced by approximately 30%. This solves the problems of conventional glazes, such as a loose surface microstructure, short-lived antimicrobial properties, and the difficulty in balancing glaze hardness and smoothness. In particular, it avoids the discoloration of the glaze caused by conventional silver-based antimicrobial agents. This overcomes the shortcomings of existing technologies, such as insufficient surface smoothness, short-lived antimicrobial properties, and the conflicting demands of cleanability and antimicrobial properties, thus meeting the market demand for high-end sanitary ware.

[0032] The technical solution of the present invention is further explained by using embodiments below, which are as follows: Example 1 A method for preparing a sanitary ceramic glaze comprises the following steps: S1. Frit preparation: Weigh according to the following weight proportions: 25 parts of quartz powder, 35 parts of feldspar powder, 11 parts of talc, 8 parts of light calcium, 5 parts of acid thorn ditch soil, 4 parts of left cloud soil, 7 parts of zinc oxide and 5 parts of zirconium silicate, grind and mix them evenly, place them in a crucible and fully melt them in a silicon-molybdenum electric furnace at a melting temperature of 1600°C. After keeping warm for 20 minutes, quench with water and dry them to obtain a frit for later use.

[0033] S2, Frit slurry: The frit, 5 mm alumina balls and water were weighed in a mass ratio of 450:550:200, added into a rapid grinding mill, and ball milled at 600 rad / min for 1.5 h to obtain a frit slurry.

[0034] S3. Glaze slurry preparation: Frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate were weighed in a mass ratio of 380:20:1000:200:0.5, added to a 500 g alumina ball mill jar of a rapid grinder, and ball milled at 600 rad / min for 20 min; then passed through a 180 mesh sieve to obtain a sanitary ceramic glaze.

[0035] The glaze of sanitary ceramics contains SiO259.64%, Al2O39.50%, CaO 13.1%, MgO 3.46%, Fe2O31.25%, TiO20.75%, K2O 8.55%, and Na2O 3.75%.

[0036] Example 2 A method for preparing a sanitary ceramic glaze comprises the following steps: S1. Frit preparation: Weigh according to the following weight parts: 28 parts of quartz powder, 38 parts of feldspar powder, 18 parts of talc, 10 parts of light calcium, 8 parts of acid thorn ditch soil, 6 parts of left cloud soil, 9 parts of zinc oxide and 6 parts of zirconium silicate, grind and mix them evenly, place them in a crucible and fully melt them in a silicon-molybdenum electric furnace at a melting temperature of 1600°C. After keeping warm for 20 minutes, quench with water and dry them to obtain a frit for standby use.

[0037] S2, Frit slurry: The frit, 5 mm alumina balls and water were weighed in a mass ratio of 450:550:200, added into a rapid grinding mill, and ball milled at 600 rad / min for 1.5 h to obtain a frit slurry.

[0038] S3. Glaze slurry preparation: Frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate were weighed in a mass ratio of 380:20:1000:200:0.5, added to a 500 g alumina ball mill jar of a rapid grinder, and ball milled at 600 rad / min for 20 min; then passed through a 180 mesh sieve to obtain a sanitary ceramic glaze.

[0039] The glaze of sanitary ceramics contains SiO263.6%, Al2O39.50%, CaO 12.95%, MgO 3.42%, Fe2O30.10%, TiO20.09%, K2O 8.09%, and Na2O 2.25%.

[0040] Example 3 A method for preparing a sanitary ceramic glaze comprises the following steps: S1. Frit preparation: Weigh according to the following weight proportions: 25 parts of quartz powder, 35 parts of feldspar powder, 11 parts of talc, 8 parts of light calcium, 5 parts of acid thorn ditch soil, 4 parts of left cloud soil, 7 parts of zinc oxide and 5 parts of zirconium silicate, grind and mix them evenly, place them in a crucible and fully melt them in a silicon-molybdenum electric furnace at a melting temperature of 1600°C. After keeping warm for 20 minutes, quench with water and dry them to obtain a frit for later use.

[0041] S2, Frit slurry: The frit, 5 mm alumina balls and water were weighed in a mass ratio of 500:600:250, added into a rapid grinding mill, and ball milled at 600 rad / min for 1.5 h to obtain a frit slurry.

[0042] S3. Glaze slurry preparation: Frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate were weighed in a mass ratio of 380:20:1000:200:0.5, added to a 500 g alumina ball mill jar of a rapid grinder, and ball milled at 600 rad / min for 20 min; then passed through a 180 mesh sieve to obtain a sanitary ceramic glaze.

[0043] The glaze of sanitary ceramics contains SiO261.78%, Al2O38.62%, CaO 13.55%, MgO 3.42%, Fe2O31.18%, TiO20.09%, K2O 7.61%, and Na2O 3.75%.

[0044] Example 4 A method for preparing a sanitary ceramic glaze comprises the following steps: S1. Frit preparation: Weigh according to the following weight proportions: 25 parts of quartz powder, 35 parts of feldspar powder, 11 parts of talc, 8 parts of light calcium, 5 parts of acid thorn ditch soil, 4 parts of left cloud soil, 7 parts of zinc oxide and 5 parts of zirconium silicate, grind and mix them evenly, place them in a crucible and fully melt them in a silicon-molybdenum electric furnace at a melting temperature of 1600°C. After keeping warm for 20 minutes, quench with water and dry them to obtain a frit for later use.

[0045] S2, Frit slurry: The frit, 5 mm alumina balls and water were weighed in a mass ratio of 450:550:200, added into a rapid grinding mill, and ball milled at 600 rad / min for 1.5 h to obtain a frit slurry.

[0046] S3. Glaze slurry preparation: The frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate were weighed in a mass ratio of 400:22:1100:250:0.8, added to a 500 g alumina ball mill jar of a rapid grinder, and ball milled at 600 rad / min for 20 min; then passed through a 180 mesh sieve to obtain a sanitary ceramic glaze.

[0047] The glaze of sanitary ceramics contains SiO258.6%, Al2O313.04%, CaO 12.45%, MgO 3.42%, Fe2O30.54%, TiO20.22%, K2O 8.55%, and Na2O 3.18%.

[0048] Example 5 A method for preparing a sanitary ceramic glaze comprises the following steps: S1. Frit preparation: Weigh according to the following weight proportions: 25 parts of quartz powder, 35 parts of feldspar powder, 11 parts of talc, 8 parts of light calcium, 5 parts of acid thorn ditch soil, 4 parts of left cloud soil, 7 parts of zinc oxide and 5 parts of zirconium silicate, grind and mix them evenly, place them in a crucible and fully melt them in a silicon-molybdenum electric furnace at a melting temperature of 1400°C. After keeping warm for 20 minutes, quench with water and dry them to obtain a frit for later use.

[0049] S2, Frit slurry: The frit, 5 mm alumina balls and water were weighed in a mass ratio of 450:550:200, added into a rapid grinder, and ball milled at 500 rad / min for 1.5 h to obtain a frit slurry.

[0050] S3. Glaze slurry preparation: The frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate were weighed in a mass ratio of 380:20:1000:200:0.5, added to a 500 g alumina ball mill jar of a rapid grinder, and ball milled at 550 rad / min for 20 min; then passed through a 180 mesh sieve to obtain a sanitary ceramic glaze.

[0051] The glaze of sanitary ceramics contains SiO262.77%, Al2O39.50%, CaO 12.45%, MgO 2.44%, Fe2O30.92%, TiO20.75%, K2O 8.19%, and Na2O 2.98%.

[0052] Examples 1 to 5 of the present invention all produced sanitary ceramic glazes with similar performance. The sanitary ceramic glaze produced in Example 1 is taken as an example to study its performance: observe Figure 1 The particle size distribution of the frit slurry prepared in Example 1 was as follows: D50 = 5.45µm, D90 = 14.82µm, and D95 ​​≤ 17.73µm. Particles with a diameter < 3.5µm accounted for ≥ 34.33%, and particles < 10µm accounted for ≥ 74.36%. This particle size range helps the frit maintain a flow length of 30mm to 40mm (inclined plate method) when melting at 1200°C to 1230°C, thereby covering any pits in the white glaze caused by high viscosity or bubble overflow during the melting process.

[0053] Application method: The sanitary ceramic glaze of Example 1 was mixed with 30 mL of red ink. The red ink was used for coloring to obtain a glaze slurry. The specific gravity of the glaze slurry was adjusted to 1.60 and the fluidity was adjusted to 30 seconds. The glaze slurry was then loaded into a spray gun and sprayed evenly on the surface of the ceramic body at a pressure of 6 kg. The glaze amount was controlled to be 0.01 g / cm 2 The glazed ceramic body is placed in a kiln and fired at 1220°C for 18 hours. After firing, it is naturally cooled to obtain antibacterial sanitary ceramics.

[0054] Test method and test results: (1) Antifouling standard and test method: GB / T34549-2024. The antifouling performance test results show that the antibacterial sanitary ceramics prepared using the sanitary ceramic glaze of the present invention have excellent antifouling performance. When the surface of the product is vigorously smeared with atomic ink and an oil-based marker, dried and then washed, no more than three stains remain in the contaminated area of ​​2 cm × 2 cm. This is comparable to sanitary ceramics prepared using existing technology for TOTO, Jomoo, and Faenza brand products on the market, and complies with the GB / T34549-2024 standard.

[0055] (2) Antibacterial performance standards and test methods: JC / T897-2014 Staphylococcus aureus AS1.89. Escherichia coli AS1.90, antibacterial performance must be ≥90%. The test results are shown in Table 1.

[0056] Table 1 Microbial test results of antibacterial sanitary ceramics made using the sanitary ceramic glaze of the present invention The results in Table 1 indicate that the antibacterial sanitary ceramics produced using the sanitary ceramic glaze of the present invention have antibacterial rates of 99.99% against Escherichia coli (AS 1.90) and 99.99% against Staphylococcus aureus (AS 1.89), respectively. Overall, the antibacterial sanitary ceramics produced using the sanitary ceramic glaze of the present invention exhibit excellent antibacterial effects against both Escherichia coli (AS 1.90) and Staphylococcus aureus (AS 1.89), effectively inhibiting the growth and reproduction of both bacteria. This provides reliable antibacterial protection for sanitary ceramics and demonstrates significant advantages in antibacterial performance.

[0057] (3) Test methods for glaze whiteness and internal illumination index: GB / T 5950-2008 "Measurement of whiteness of building materials and non-metallic mineral products" is usually measured using a spectrophotometer or whiteness meter. Ordinary sanitary ceramics: The whiteness is usually required to be between 70% and 85%.

[0058] GB 6566-2010, "Limits of Radionuclides in Building Materials," is typically determined using a low-background gamma spectrometer. Decoration materials (Class A): (I_{Ra} ≤ 1.0) and an external exposure index ≤ 1.3.

[0059] After testing, the antibacterial sanitary ceramics made by using the sanitary ceramic glaze of the present invention have a glaze whiteness of ≥75 (white glaze whiteness 82), an internal radiation index of ≤0.154, and an external radiation index of ≤0.289, which meets the GB6566-2010 standard.

[0060] (4) Roughness test method: According to GB / T 1031-2009 and GB / T 10610-2009, the ceramic surface profile was measured using the profilometry method, and surface roughness parameters were derived from this analysis. Testing was performed using an asphericity measuring instrument (PGI 3D). Test conditions were: a cleanroom A116 environment at 22.5°C and 52% humidity. The test results are shown in Table 2.

[0061] Table 2 Roughness test results According to the data in Table 2, the surface roughness of sanitary ceramics prepared with traditional glazes is 0.050 μm, while the surface roughness of sanitary ceramics prepared with the antibacterial glaze of the present invention is as low as 0.024 μm, indicating that the glaze layer has a significantly improved smoothness. With improved surface smoothness, the glaze surface is easier to clean and less likely to harbor bacteria.

[0062] It should be noted that when the present invention involves numerical ranges, it should be understood that both endpoints of each numerical range and any value between the two endpoints can be selected. Since the steps and methods used are the same as those in the embodiments, in order to avoid redundancy, the present invention describes preferred embodiments. Although preferred embodiments of the present invention have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once they understand the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

Claims

1. A sanitary ceramic glaze, characterized in that: The sanitary ceramic glaze is made of the following chemical components in mass percentage: SiO2 58.6%-63.6%, Al2O3 6%-11%, CaO 10%-15%, MgO 1%-5%, Fe2O3 0.05%-2%, TiO2 0.02%-1.2%, K2O 11%-16%, and Na2O 0.9%-5%, and the sum of the mass percentages of the chemical components is 100%.

2. A sanitary ceramic glaze according to claim 1, characterized in that: The sanitary ceramic glaze is made of the following chemical components in mass percentage: SiO2 59.64%-61.78%, Al2O3 8.62%-9.50%, CaO 12.45%-13.10%, MgO 2.42%-3.80%, Fe2O3 0.10%-1.25%, TiO2 0.09%-0.75%, K2O 7.09%-8.55%, and Na2O 1.98%-3.75%, and the sum of the mass percentages of the chemical components is 100%.

3. A sanitary ceramic glaze according to claim 1, characterized in that: The internal radiation index of sanitary ceramic glaze is 0.1~0.3, and the external radiation index is 0.2~0.

4.

4. A method for preparing the sanitary ceramic glaze according to any one of claims 1 to 3, characterized in that: The following steps are involved: By weight, 25 to 28 parts of quartz powder, 35 to 38 parts of feldspar powder, 11 to 18 parts of talc, 8 to 10 parts of light calcium carbonate, 5 to 8 parts of acid thorn ditch soil, 4 to 6 parts of left cloud soil, 7 to 9 parts of zinc oxide, and 5 to 6 parts of zirconium silicate are mixed, melted at 1400° C. to 1600° C., quenched with water, and then dried to obtain a frit; The frit is mixed with water and subjected to a first ball milling process to obtain a frit slurry; The frit slurry, kaolin, water and sodium carbonate are mixed, ball-milled for the second time, and sieved to obtain a sanitary ceramic glaze.

5. The method for preparing a sanitary ceramic glaze according to claim 4, characterized in that: The mass ratio of frit to water is 9~10:4~5.

6. The method for preparing a sanitary ceramic glaze according to claim 4, characterized in that: The mass ratio of frit, kaolin, water and sodium carbonate is 380~400:20~22:200~250:0.5~0.

8. 7.An antibacterial sanitary ceramic, characterized in that: The antibacterial sanitary ceramics are prepared by using the sanitary ceramic glaze according to claim 1, spraying the sanitary ceramic glaze on the surface of the ceramic body, and firing the body to obtain the antibacterial sanitary ceramics.

8. The antibacterial sanitary ceramic according to claim 7, characterized in that: The firing conditions are: firing at 1220℃~1230℃ for 18h~20h.

9. The antibacterial sanitary ceramic according to claim 7, characterized in that: The spraying amount of sanitary ceramic glaze is 0.01g / cm 2 ~0.028g / cm 2 .

10. The antibacterial sanitary ceramic according to claim 7, characterized in that: The ceramic body is also sprayed with white glaze before spraying the sanitary ceramic glaze. The thickness of the white glaze coating is 0.3mm~0.5mm.

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