Sanitary ceramic glaze and preparation method and application thereof

Abstract

The present application relates to the technical field of ceramics, and particularly relates to a sanitary ceramic glaze, a preparation method and application thereof. The sanitary ceramic glaze is made of the following chemical components with 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 the chemical components is 100%. The sanitary ceramic glaze provided by the present application has high hardness, excellent easy-to-clean and antibacterial properties, an antibacterial rate of more than 99% and significantly improved durability, meets the market demand of high-end sanitary wares, and overcomes the defects of the existing sanitary ceramic glaze technology, such as insufficient surface smoothness, non-durable antibacterial performance, and mutual restriction of easy-to-clean and antibacterial properties.

Description

Technical Field

[0001] This invention relates to the field of ceramic technology, specifically to a sanitary ceramic glaze, its preparation method, and its application. Background Technology

[0002] Ceramic glazes, as a key coating on the surface of sanitary ware such as toilets and washbasins, directly affect the user experience and hygiene. Traditional ceramic glazes primarily focus on decoration and basic stain resistance, but with increasing health awareness, market demand for glazes that combine ultra-smoothness, easy cleaning, and antibacterial properties has surged. Currently, sanitary ceramics made using traditional glazes generally suffer from problems such as a non-dense surface microstructure, short-lived antibacterial properties, and difficulty in balancing glaze hardness and smoothness. In particular, traditional silver-based antibacterial agents tend to cause glaze discoloration, limiting their application range. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a sanitary ceramic glaze, its preparation method, and its application. The sanitary ceramic glaze of this invention is composed of the following chemical components by 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%, totaling 100%. The sanitary ceramic glaze provided by this invention possesses high hardness, excellent easy-cleaning properties, and antibacterial properties, with an antibacterial rate >99% and significantly improved durability. Furthermore, by optimizing the preparation process, production costs are 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-lasting antibacterial performance, and the mutual constraint between easy-cleaning and antibacterial properties.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] The first objective of this invention is to provide a sanitary ceramic glaze, which is made of the following chemical components in the following mass percentages: 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%.

[0006] Preferably, the sanitary ceramic glaze is made of the following chemical components by 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 each chemical component is 100%.

[0007] Preferably, the internal irradiation index of the sanitary ceramic glaze is 0.1~0.3, and the external irradiation index is 0.2~0.4.

[0008] 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.

[0009] Preferably, the sanitary ceramic glaze passes through an 180-mesh sieve.

[0010] A second objective of this invention is to provide a method for preparing the above-mentioned sanitary ceramic glaze, comprising the following steps:

[0011] S1. By weight, mix 25-28 parts of quartz powder, 35-38 parts of feldspar powder, 11-18 parts of talc, 8-10 parts of light calcium carbonate, 5-8 parts of acid-spun clay, 4-6 parts of tungsten clay, 7-9 parts of zinc oxide and 5-6 parts of zirconium silicate, and melt them at 1400℃-1600℃. After water quenching, dry them to obtain a frit.

[0012] S2. Mix the frit and water, and perform a first ball milling process to obtain frit slurry.

[0013] S3. Mix the frit slurry, kaolin, water and sodium carbonate, and perform a second ball milling process. After sieving, sanitary ceramic glaze is obtained.

[0014] Preferably, the mass ratio of frit to water is 9~10:4~5.

[0015] Preferably, the mass ratio of frit, kaolin, water and sodium carbonate is 380~400:20~22:200~250:0.5~0.8.

[0016] Preferably, the particle size distribution of the frit slurry is: D 50 It is 5.45µm, D 90 It is 14.82µm, D 95 The particle size is 17.73µm, and the proportion of particles with a diameter less than 3.5µm is not less than 34.33%.

[0017] Preferably, the melting treatment conditions are: holding at 1550℃~1600℃ for 20min~30min.

[0018] Preferably, the conditions for the first ball milling treatment are: ball milling at 500 rad / min to 600 rad / min for 1.5 h.

[0019] Preferably, the conditions for the second ball milling treatment are: ball milling at 550 rad / min to 600 rad / min for 20 min.

[0020] Preferably, the particle size D of the quartz powder and feldspar powder is... 90 With a particle size of 8µm to 10µm, this range ensures that the quartz powder and feldspar powder are fully melted under the preferred processing temperature, allowing the feldspar powder and quartz powder to be perfectly coated. After cooling, this forms micro-defective particles, which ultimately improves the hardness of the glaze, enhances the wear resistance of antibacterial sanitary ceramics, and extends the decay cycle of antibacterial sanitary ceramics.

[0021] The third objective of this invention is an antibacterial sanitary ceramic, which is made using the aforementioned sanitary ceramic glaze; the sanitary ceramic glaze is sprayed onto the surface of a ceramic body and then fired to form a glaze surface, thereby obtaining the antibacterial sanitary ceramic.

[0022] Preferably, the firing conditions are: firing at 1220℃~1230℃ for 18h~20h.

[0023] Preferably, the coating amount of the sanitary ceramic glaze is 0.01 g / cm³. 2 ~0.028g / cm 2 Below this range, it has virtually no antibacterial and anti-fouling effects and is not significantly different from white glaze; above this range, the glaze is very prone to cracking during drying and firing, and there will be obvious color differences, affecting the overall aesthetics of the product.

[0024] Preferably, the ceramic body is coated with white glaze before the sanitary ceramic glaze is applied. The thickness of the white glaze coating is 0.3mm to 0.5mm. This range is the best parameter obtained through long-term industry accumulation. If it is too thin, the whiteness will not meet the requirements and the quality will be affected. If it is too thick, it will increase the cost and increase the number of pinhole defects, reduce the gloss and stain resistance.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. This invention provides a sanitary ceramic glaze, made from the following chemical components by 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%. Applying this sanitary ceramic glaze to a ceramic body not only significantly improves the surface smoothness of the ceramic body and reduces stain adhesion, but also exhibits lower residue levels in oil-based ink stain resistance tests. Furthermore, the glaze whiteness can stably reach above 75 (white glaze whiteness 82), while the radioactivity index (internal exposure index ≤0.154, external exposure index ≤0.289) meets the GB6566-2010 standard, ensuring safety and environmental protection.

[0027] 2. This invention provides a method for preparing sanitary ceramic glaze: 25-28 parts by weight of quartz powder, 35-38 parts by weight of feldspar powder, 11-18 parts by weight of talc, 8-10 parts by weight of light calcium carbonate, 5-8 parts by weight of acid-hardened clay, 4-6 parts by weight of tungsten clay, 7-9 parts by weight of zinc oxide, and 5-6 parts by weight of zirconium silicate are mixed and melted at 1400℃-1600℃. After water quenching, the mixture is 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 and subjected to a second ball milling process. After sieving, red ink is added to obtain the sanitary ceramic glaze. The first ball milling process is to process the frit to a D50 of 4µm~6µm and a D90 of 10µm~20µm to ensure that it can be fully melted and has good fluidity during the firing process of antibacterial sanitary ceramics, so as to fill the pores formed by the white glaze. The second ball milling process is to mix the frit with kaolin evenly to ensure that the frit has stable suspension during actual use.

[0028] 3. Compared with the existing antibacterial sanitary ceramics of TOTO and Jomoo 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 effect, and also have the advantage of high whiteness. Attached Figure Description

[0029] Figure 1 This is a particle size distribution diagram of the frit slurry in Example 1. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the data in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that the technical terms used in this invention are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of this invention. Unless otherwise specified, all raw materials, reagents, instruments and equipment used in the following embodiments of this invention can be purchased on the market or prepared by existing methods.

[0032] In the existing technology, sanitary ware made from traditional ceramic glazes generally suffers from problems such as non-dense microstructure of the glaze surface, easy residue of stains, short-lived antibacterial properties and easy discoloration of the glaze surface (especially when using silver-based antibacterial agents), and difficulty in simultaneously achieving high glaze hardness and ultra-smooth surface.

[0033] To address the problems existing in the prior art, the present invention provides a sanitary ceramic glaze, characterized in that the sanitary ceramic glaze is made of the following chemical components by 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%.

[0034] This invention combines zinc, silver, and rare earth antibacterial particles with quartz, feldspar, and clay to form a frit (glassy material). The fineness of the frit is reduced to a D90 of less than 20 micrometers (compared to a conventional 325-mesh sieve), improving fluidity and enabling the smoothing of uneven glaze surfaces formed by white glaze. Furthermore, increasing the aluminum content in the sanitary ceramic glaze enhances the glaze's wear resistance and corrosion resistance. The resulting sanitary ceramic glaze not only possesses high hardness but also excellent easy-cleaning and antibacterial properties, with an antibacterial rate >99% and significantly improved durability. Simultaneously, by optimizing the preparation process, production costs are reduced by approximately 30%. This invention solves the problems of non-dense microstructure, short-lived antibacterial performance, and difficulty in balancing glaze hardness and smoothness in traditional glazes. In particular, it avoids the discoloration of the glaze caused by traditional silver-based antibacterial agents, overcoming the shortcomings of existing technologies such as insufficient surface smoothness, short-lasting antibacterial performance, and the mutual constraint between easy-cleaning and antibacterial properties, thus meeting the market demand for high-end sanitary ware.

[0035] The technical solution of the present invention will be further explained and illustrated below with examples, as detailed below:

[0036] Example 1

[0037] A method for preparing a sanitary ceramic glaze includes the following steps:

[0038] S1. Fused Ingot Preparation:

[0039] Weigh out the following parts by weight: 25 parts quartz powder, 35 parts feldspar powder, 11 parts talc, 8 parts light calcium carbonate, 5 parts acid-rich soil, 4 parts tungsten, 7 parts zinc oxide, and 5 parts zirconium silicate. After crushing and mixing them evenly, place them in a crucible and melt them fully in a silicon-molybdenum electric furnace at a melting temperature of 1600℃. After holding at this temperature for 20 minutes, quench them in water and then dry them to obtain a fused mass for later use.

[0040] S2, Fused Paste:

[0041] Weigh out the frit, 5mm alumina balls and water in a mass ratio of 450:550:200, add them together to a high-speed mill, and ball mill at 600 rad / min for 1.5 h to obtain frit slurry.

[0042] S3, Glaze preparation:

[0043] Weigh out the frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate in a mass ratio of 380:20:1000:200:0.5, add them to a 500g alumina ball mill jar of a high-speed grinder, and ball mill at 600 rad / min for 20 min; then pass them through a 180-mesh sieve to obtain sanitary ceramic glaze.

[0044] The sanitary ceramic glaze contains 59.64% SiO2, 9.50% Al2O3, 13.1% CaO, 3.46% MgO, 1.25% Fe2O3, 0.75% TiO2, 8.55% K2O, and 3.75% Na2O.

[0045] Example 2

[0046] A method for preparing a sanitary ceramic glaze includes the following steps:

[0047] S1. Fused Ingot Preparation:

[0048] Weigh out the following parts by weight: 28 parts quartz powder, 38 parts feldspar powder, 18 parts talc, 10 parts light calcium carbonate, 8 parts acid-spun clay, 6 parts tung oil, 9 parts zinc oxide, and 6 parts zirconium silicate. After crushing and mixing them evenly, place them in a crucible and melt them fully in a silicon-molybdenum electric furnace at a melting temperature of 1600℃. After holding at this temperature for 20 minutes, quench them in water and then dry them to obtain a fused mass for later use.

[0049] S2, Fused Paste:

[0050] Weigh out the frit, 5mm alumina balls and water in a mass ratio of 450:550:200, add them together to a high-speed mill, and ball mill at 600 rad / min for 1.5 h to obtain frit slurry.

[0051] S3, Glaze preparation:

[0052] Weigh out the frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate in a mass ratio of 380:20:1000:200:0.5, add them to a 500g alumina ball mill jar of a high-speed grinder, and ball mill at 600 rad / min for 20 min; then pass them through a 180-mesh sieve to obtain sanitary ceramic glaze.

[0053] The sanitary ceramic glaze contains 63.6% SiO2, 9.50% Al2O3, 12.95% CaO, 3.42% MgO, 0.10% Fe2O3, 0.09% TiO2, 8.09% K2O, and 2.25% Na2O.

[0054] Example 3

[0055] A method for preparing a sanitary ceramic glaze includes the following steps:

[0056] S1. Fused Ingot Preparation:

[0057] Weigh out the following parts by weight: 25 parts quartz powder, 35 parts feldspar powder, 11 parts talc, 8 parts light calcium carbonate, 5 parts acid-rich soil, 4 parts tungsten, 7 parts zinc oxide, and 5 parts zirconium silicate. After crushing and mixing them evenly, place them in a crucible and melt them fully in a silicon-molybdenum electric furnace at a melting temperature of 1600℃. After holding at this temperature for 20 minutes, quench them in water and then dry them to obtain a fused mass for later use.

[0058] S2, Fused Paste:

[0059] Weigh out the frit, 5mm alumina balls and water in a mass ratio of 500:600:250, add them together to a high-speed mill, and ball mill at 600 rad / min for 1.5 h to obtain frit slurry.

[0060] S3, Glaze preparation:

[0061] Weigh out the frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate in a mass ratio of 380:20:1000:200:0.5, add them to a 500g alumina ball mill jar of a high-speed grinder, and ball mill at 600 rad / min for 20 min; then pass them through a 180-mesh sieve to obtain sanitary ceramic glaze.

[0062] The sanitary ceramic glaze contains 61.78% SiO2, 8.62% Al2O3, 13.55% CaO, 3.42% MgO, 1.18% Fe2O3, 0.09% TiO2, 7.61% K2O, and 3.75% Na2O.

[0063] Example 4

[0064] A method for preparing a sanitary ceramic glaze includes the following steps:

[0065] S1. Fused Ingot Preparation:

[0066] Weigh out the following parts by weight: 25 parts quartz powder, 35 parts feldspar powder, 11 parts talc, 8 parts light calcium carbonate, 5 parts acid-rich soil, 4 parts tungsten, 7 parts zinc oxide, and 5 parts zirconium silicate. After crushing and mixing them evenly, place them in a crucible and melt them fully in a silicon-molybdenum electric furnace at a melting temperature of 1600℃. After holding at this temperature for 20 minutes, quench them in water and then dry them to obtain a fused mass for later use.

[0067] S2, Fused Paste:

[0068] Weigh out the frit, 5mm alumina balls and water in a mass ratio of 450:550:200, add them together to a high-speed mill, and ball mill at 600 rad / min for 1.5 h to obtain frit slurry.

[0069] S3, Glaze preparation:

[0070] Weigh out the frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate in a mass ratio of 400:22:1100:250:0.8, add them to a 500g alumina ball mill jar of a high-speed grinder, and ball mill at 600 rad / min for 20 min; then pass them through a 180-mesh sieve to obtain sanitary ceramic glaze.

[0071] The sanitary ceramic glaze contains 58.6% SiO2, 13.04% Al2O3, 12.45% CaO, 3.42% MgO, 0.54% Fe2O3, 0.22% TiO2, 8.55% K2O, and 3.18% Na2O.

[0072] Example 5

[0073] A method for preparing a sanitary ceramic glaze includes the following steps:

[0074] S1. Fused Ingot Preparation:

[0075] Weigh out the following parts by weight: 25 parts quartz powder, 35 parts feldspar powder, 11 parts talc, 8 parts light calcium carbonate, 5 parts acid-spun clay, 4 parts tung oil, 7 parts zinc oxide, and 5 parts zirconium silicate. After crushing and mixing them evenly, place them in a crucible and melt them fully in a silicon-molybdenum electric furnace at a melting temperature of 1400℃. After holding at this temperature for 20 minutes, quench them in water and then dry them to obtain a fused mass for later use.

[0076] S2, Fused Paste:

[0077] Weigh out the frit, 5mm alumina balls and water in a mass ratio of 450:550:200, add them together to a high-speed mill, and ball mill at 500 rad / min for 1.5 h to obtain frit slurry.

[0078] S3, Glaze preparation:

[0079] Weigh out the frit slurry, kaolin, alumina balls with a particle size of 15 mm, water and sodium carbonate in a mass ratio of 380:20:1000:200:0.5, add them to a 500g alumina ball mill jar of a high-speed grinder, and ball mill at 550 rad / min for 20 min; then pass through a 180-mesh sieve to obtain sanitary ceramic glaze.

[0080] The sanitary ceramic glaze contains 62.77% SiO2, 9.50% Al2O3, 12.45% CaO, 2.44% MgO, 0.92% Fe2O3, 0.75% TiO2, 8.19% K2O, and 2.98% Na2O.

[0081] Sanitary ceramic glazes were prepared in Examples 1 to 5 of this invention, and their properties were similar. The performance of the sanitary ceramic glaze prepared in Example 1 will be studied below:

[0082] observe Figure 1 The particle size distribution of the frit slurry prepared in Example 1 was found to be: D50 = 5.45µm, D90 = 14.82µm, D95 ≤ 17.73µm, with particles <3.5µm accounting for ≥34.33% and particles <10µm accounting for ≥74.36%. This particle size range helps the frit maintain a flow length of 30mm to 40mm (tilted plate method) when melting at 1200℃ to 1230℃, thereby achieving the purpose of covering the pits caused by high viscosity or bubble overflow in the white glaze during the melting process.

[0083] Application method:

[0084] The sanitary ceramic glaze from Example 1 was mixed with 30 mL of red ink for color adjustment 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 onto the surface of the ceramic body at a pressure of 6 kg, controlling the glaze application rate to be 0.01 g / cm³. 2The glazed ceramic blank is placed in a kiln and fired at 1220℃ for 18 hours. After firing, it is naturally cooled to obtain antibacterial sanitary ceramics.

[0085] Test method followed by test results:

[0086] (1) Stain resistance standard and test method: GB / T34549-2024. The stain resistance test results show that the antibacterial sanitary ceramics made with the sanitary ceramic glaze of the present invention have excellent stain resistance. When the product surface is vigorously coated with atomic ink and oil-based marker, dried and cleaned, no more than 3 stains remain in a 2cm×2cm contaminated area. This is comparable to the sanitary ceramics prepared by existing technologies of TOTO, Jomoo and Faenza brands on the market and meets the GB / T34549-2024 standard.

[0087] (2) Antibacterial standards and test methods: JC / T897-2014 Staphylococcus aureus AS1.89. Escherichia coli AS1.90, antibacterial performance needs to be ≥90%. The test results are shown in Table 1.

[0088] Table 1. Microbiological test results of antibacterial sanitary ceramics prepared using the sanitary ceramic glaze of the present invention.

[0089]

[0090] As shown in Table 1, the antibacterial sanitary ceramics made using the sanitary ceramic glaze of the present invention exhibit antibacterial rates of 99.99% against Escherichia coli (AS 1.90) and 99.99% against Staphylococcus aureus (AS 1.89). In summary, the antibacterial sanitary ceramics made using the sanitary ceramic glaze of the present invention demonstrate excellent antibacterial effects against both Escherichia coli (AS 1.90) and Staphylococcus aureus (AS 1.89), effectively inhibiting the growth and reproduction of these two bacteria, providing reliable antibacterial protection for sanitary ceramics, and showing significant advantages in antibacterial performance.

[0091] (3) Test methods for glaze whiteness and internal illumination index:

[0092] GB / T 5950-2008, "Methods for Measurement of Whiteness of Building Materials and Non-metallic Mineral Products," typically uses a spectrophotometer or whiteness meter for measurement. For ordinary sanitary ceramics: whiteness is usually required to be 70%~85%.

[0093] GB 6566-2010, "Limits of Radionuclides in Building Materials," typically uses a low-background gamma spectrometer for determination. For decorative materials (Class A): (I_{Ra}≤1.0), and the external exposure index ≤1.3.

[0094] According to testing, the antibacterial sanitary ceramics made using the sanitary ceramic glaze of this invention have a glaze whiteness ≥75 (white glaze whiteness 82), an internal irradiation index ≤0.154, and an external irradiation index ≤0.289, which meets the GB6566-2010 standard.

[0095] (4) Roughness testing methods:

[0096] According to GB / T 1031-2009 and GB / T 10610-2009, the profile method was used to measure the surface profile of ceramics, and then the surface roughness parameters were analyzed. An aspherical surface measuring instrument (model PGI 3D) was used for testing. The test conditions were: a cleanroom A116 environment with a temperature of 22.5℃ and a humidity of 52%RH. The test results are shown in Table 2.

[0097] Table 2 Roughness test results

[0098]

[0099] According to the data in Table 2, the surface roughness of sanitary ceramics prepared using traditional glazes is 0.050 μm, while the surface roughness of sanitary ceramics prepared using the antibacterial glaze of this invention is as low as 0.024 μm, indicating a significant improvement in glaze smoothness. With improved surface smoothness, the glaze surface is easier to clean, and bacteria are less likely to remain.

[0100] It should be noted that when numerical ranges are involved in this invention, it should be understood that both endpoints of each numerical range, as well as any value between the two endpoints, can be selected. Since the steps and methods used are the same as in the embodiments, preferred embodiments are described here to avoid redundancy. Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this invention.

Claims

1. A method for preparing a sanitary ceramic glaze, characterized in that, Includes the following steps: By weight, 25-28 parts of quartz powder, 35-38 parts of feldspar powder, 11-18 parts of talc, 8-10 parts of light calcium carbonate, 5-8 parts of acid-spun clay, 4-6 parts of tungsten clay, 7-9 parts of zinc oxide and 5-6 parts of zirconium silicate are mixed and melted at 1400℃-1600℃. After water quenching and drying, a frit is obtained. The frit and water are mixed and subjected to a first ball milling process to obtain a frit slurry; the mass ratio of frit to water is 9~10:4~5. The frit slurry, kaolin, water and sodium carbonate are mixed and subjected to a second ball milling process. After sieving, the sanitary ceramic glaze is obtained. The mass ratio of frit slurry, kaolin, water, and sodium carbonate is 380~400:20~22:200~250:0.5~0.8; The particle size distribution of the frit slurry is: D 50 It is 5.45µm, D 90 It is 14.82µm, D 95 The particle size is 17.73µm, and the proportion of particles with a diameter less than 3.5µm is ≥34.33%, and the proportion of particles with a diameter less than 10µm is ≥74.36%.

2. An antibacterial sanitary ceramic, characterized in that, A sanitary ceramic glaze is sprayed onto the surface of a ceramic body and then fired to obtain antibacterial sanitary ceramics; wherein the sanitary ceramic glaze is prepared by the method for preparing sanitary ceramic glaze according to claim 1. The coating amount of the sanitary ceramic glaze is 0.01 g / cm³. 2 ~0.028g / cm 2 .

3. The antibacterial sanitary ceramic according to claim 2, characterized in that, The firing conditions are: firing at 1220℃~1230℃ for 18h~20h.

4. The antibacterial sanitary ceramic according to claim 2, characterized in that, Before the sanitary ceramic glaze is applied, the ceramic body is also coated with white glaze, and the thickness of the white glaze coating is 0.3mm~0.5mm.

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