A glaze suitable for large rectangular basins and its preparation method

Abstract

This application relates to the field of sanitary ceramics technology, and more particularly to a glaze suitable for large rectangular basins and its preparation method. It comprises the following raw materials in parts by weight: potassium feldspar, quartz powder, calcined kaolin, alumina powder, calcite, dolomite, zinc oxide, calcined talc powder, and zirconium silicate. The particle size distribution of the potassium feldspar, quartz powder, calcined kaolin, alumina powder, calcite, dolomite, zinc oxide, calcined talc powder, and zirconium silicate is as follows: 70-80% for 1-10 micrometers, 15-20% for 10-20 micrometers, and 5-10% for 20-40 micrometers. By precisely controlling the particle size distribution of the raw materials and using modified zirconium silicate, the firing shrinkage rate of the ceramic glaze product for large rectangular basins is reduced, making the glaze layer more compatible with the main body of the large rectangular basin, and solving problems such as potential condensation and glaze cracking.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sanitary ceramics, in particular to a glaze for a large basin process and a preparation method thereof. BACKGROUND

[0002] Sanitary ceramics are glazed ceramic products used in places such as bathrooms, kitchens and laboratories, and also become sanitary wares. Sanitary ceramics play an important role in building decoration materials. At present, ceramic wares are one of the commonly used kitchen utensils in people's life, and a large basin as a kind of ceramic ware is often used for household cooking or food processing. The large basin is mainly composed of a body and a glaze, and the body currently adopts a slurry with low shrinkage rate to solve the problems of deformation and shrinkage. However, the conventional glaze cannot match the above-mentioned body due to high shrinkage rate and large thermal expansion, resulting in defects such as sudden wind and post-glaze cracks, which seriously affect the product quality and aesthetic degree. SUMMARY

[0003] In order to reduce the shrinkage rate of the ceramic glaze layer of the large basin, the application provides a glaze for a large basin process and a preparation method thereof.

[0004] In a first aspect, the application provides a glaze for a large basin process and a preparation method thereof, which adopts the following technical scheme:

[0005] The glaze for a large basin process comprises the following raw materials in parts by mass: 18-22 parts of potassium feldspar, 27-33 parts of quartz powder, 5-7 parts of calcined kaolin, 2-4 parts of alumina powder, 2-4 parts of calcite, 2-4 parts of dolomite, 0.7-1.3 parts of zinc oxide, 1.5-3 parts of calcined talc powder and 7-10 parts of zirconium silicate. The particle size distribution of the potassium feldspar, the quartz powder, the calcined kaolin, the alumina powder, the calcite, the dolomite, the zinc oxide, the calcined talc powder and the zirconium silicate is as follows: 70-80% of 1-10 microns, 15-20% of 10-20 microns and 5-10% of 20-40 microns.

[0006] By employing the above technical solutions and precisely controlling the particle size distribution of raw materials, different particle sizes can be provided for the filling glazes in the large-format glaze process. This effectively fills the gaps between the main glaze materials, greatly improving the density of the glaze layer and thus reducing its shrinkage. Potassium feldspar: Improves the crack resistance, strength, and hardness of the glaze. Quartz powder: High hardness and wear resistance improve the hardness and wear resistance of the glaze. Calcined kaolin: Promotes the bonding between glaze materials, increases adhesion, and improves strength. Calcite: Excellent corrosion resistance extends the service life of the glaze. Dolomite: Fills gaps and improves the compaction of the glaze, increasing its hardness, strength, moisture resistance, and wear resistance. Zinc oxide: As a protective agent, it prevents the glaze from oxidation and corrosion. Calcined talc powder gives the glaze a certain gloss and anti-slip properties. Alumina powder and zirconium silicate can prevent glaze shrinkage and cracking, while calcined kaolin can increase the viscosity and elasticity of the glaze, further improving its shrinkage performance. Each component in the formula has its unique function, working together to enhance the hardness, reduce shrinkage, and improve the gloss of the glaze used in the large rectangular basin, making the glaze layer more compatible with the main body of the basin.

[0007] Preferably, the zirconium silicate is modified zirconium silicate, and the modification method includes the following steps:

[0008] Preparation of S21 zirconium silicate slurry: Zirconium silicate and titanate coupling agent are mixed in a mass ratio of 1000:4-6 to form a mixture, and then water is added to make a slurry with a mass concentration of 80-85% and then ground to form zirconium silicate slurry;

[0009] Preparation of S22 titanium dioxide slurry: Titanium dioxide, titanate coupling agent, and silica sol are mixed in a mass ratio of 1000:4-6:10-15, and then water is added and stirred to prepare a titanium dioxide slurry with a mass concentration of 70-75%, wherein the titanium dioxide particles have a particle size of 1-3 micrometers.

[0010] S23. The zirconium silicate slurry obtained in step S21 is mixed with the titanium dioxide slurry obtained in step S22 at a mass ratio of 20:1-2 to obtain a mixed slurry. The mixture is stirred evenly, filtered, dried, ball-milled, and sieved to obtain modified zirconium silicate. The particle size distribution of the modified zirconium silicate is 70-80% for 1-10 micrometers, 15-20% for 10-20 micrometers, and 5-10% for 20-40 micrometers.

[0011] By adopting the above technical solution, titanium dioxide is used to modify zirconium silicate, which improves the yellowing and density of the glaze layer, reduces the firing shrinkage rate of the ceramic glaze products of the large long basin, makes the glaze layer more compatible with the main body of the large long basin, solves the problems of possible frost and glaze cracks, and extends the life of the glaze of the large long basin.

[0012] Secondly, this application provides a method for preparing glaze suitable for large, long basins, using the following technical solution:

[0013] A method for preparing a glaze suitable for large rectangular basins, using the aforementioned raw materials in the specified mass proportions for large rectangular basins, includes the following steps:

[0014] S1 Mixing: Potassium feldspar, quartz powder, calcined kaolin, alumina powder, calcite, dolomite, zinc oxide, calcined talc powder and zirconium silicate are screened, weighed and mixed evenly according to the formula ratio to obtain the glaze.

[0015] S2 Glaze Slurry Preparation: Place the glaze material into a mixing device, add water, and mix to obtain a glaze slurry;

[0016] S3 spray glazing: A layer of glaze is sprayed onto the surface of the large long basin blank to obtain a glazed product;

[0017] S4 firing: After drying the glazed product at 140℃, it is placed in a kiln for firing and then naturally cooled to room temperature to obtain a large long basin ceramic glazed product.

[0018] Preferably, in step S2, the performance parameters of the glaze slurry are: specific gravity of 1.745 kg / L-1.755 kg / L and viscosity of 120-140 seconds / 100 mL.

[0019] Preferably, in step S3, the glazing is performed using automated spraying equipment at a pressure of 0.70-0.80 MPa.

[0020] Preferably, in step S3, the glaze layer thickness of the glazed product is 0.6-0.8 mm.

[0021] Preferably, in step S3, the glazing process, the blank is a thin-edged, long, rectangular ceramic blank with a wall thickness of 5 mm, after the surface layer has been dried.

[0022] Preferably, in step S4 firing, the firing process is as follows: the temperature is increased from room temperature to 600-650℃ at a heating rate of 3-4℃ / min and held for 30min, then increased to 950-1000℃ at a heating rate of 4-5℃ / min and held for 30-60min, and finally increased to 1220-1240℃ at a heating rate of 2-3℃ / min and held for 30-50min, to obtain a large long basin ceramic glazed product.

[0023] Preferably, the firing shrinkage rate of the large elongated ceramic glazed product is 5.0-7.0%.

[0024] Preferably, the gloss of the ceramic glaze product of the large elongated basin is 98-105 GU.

[0025] By adopting the above technical solution and using pressure spraying, the water absorption of the body during the glazing process is reduced, glaze flow is decreased, and glazing efficiency is improved. This helps to maintain the strength and density of the glazed body. The adhesion of the glaze layer to the body is also greatly enhanced, which can reduce defects such as glaze loss and glaze rubbing caused during handling and kiln loading, and improve the product yield.

[0026] In summary, the beneficial technical effects of this application are as follows:

[0027] 1) By precisely controlling the particle size distribution of raw materials, the density of ceramic glaze products for large long basins is improved, the shrinkage rate of the glaze layer is reduced, and the glaze layer is better matched with the main body of the large long basin, solving problems such as possible frost and cracks in the glaze.

[0028] 2) By adopting the above technical solution, titanium dioxide is used to modify zirconium silicate, which improves the yellowing and density of the glaze layer, reduces the shrinkage rate, and makes the glaze layer more compatible with the main body of the large long basin, while extending the life of the glaze of the large long basin. Detailed Implementation

[0029] The embodiments and preparation examples of this application will be described in detail below. However, those skilled in the art will understand that the following embodiments and preparation examples are for illustrative purposes only and should not be considered as limiting the scope of this application. Unless otherwise specified in the embodiments and preparation examples, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0030] Example 1

[0031] A glaze suitable for large rectangular basins comprises the following raw materials in parts by weight: 18 parts potassium feldspar, 27 parts quartz powder, 5 parts calcined kaolin, 2 parts alumina powder, 2 parts calcite, 2 parts dolomite, 0.7 parts zinc oxide, 1.5 parts calcined talc powder, and 7 parts zirconium silicate. The particle size distribution of the potassium feldspar, quartz powder, calcined kaolin, alumina powder, calcite, dolomite, zinc oxide, calcined talc powder, and zirconium silicate is as follows: 70% are 1-10 micrometers, 20% are 10-20 micrometers, and 10% are 20-40 micrometers.

[0032] Zirconium silicate is modified using a method that includes the following steps:

[0033] Preparation of S21 zirconium silicate slurry: Zirconium silicate and titanate coupling agent are mixed in a mass ratio of 1000:4 to form a mixture, and then water is added to make a slurry with a mass concentration of 80% for grinding to form zirconium silicate slurry;

[0034] Preparation of S22 titanium dioxide slurry: Titanium dioxide, titanate coupling agent, and silica sol are mixed in a mass ratio of 1000:4:10, and then water is added and stirred to prepare a titanium dioxide slurry with a mass concentration of 70%. The titanium dioxide particles have a particle size of 1-3 micrometers.

[0035] S23. The zirconium silicate slurry obtained in step S21 is mixed with the titanium dioxide slurry obtained in step S22 at a mass ratio of 20:1 to obtain a mixed slurry. The mixture is stirred evenly, filtered, dried, ball-milled, and sieved to obtain modified zirconium silicate. The particle size distribution of the modified zirconium silicate particles is 70% for 1-10 micrometers, 20% for 10-20 micrometers, and 10% for 20-40 micrometers.

[0036] Example 2

[0037] A glaze suitable for large rectangular basins comprises the following raw materials in parts by weight: 22 parts potassium feldspar, 33 parts quartz powder, 7 parts calcined kaolin, 4 parts alumina powder, 4 parts calcite, 4 parts dolomite, 1.3 parts zinc oxide, 3 parts calcined talc powder, and 10 parts zirconium silicate. The particle size distribution of the potassium feldspar, quartz powder, calcined kaolin, alumina powder, calcite, dolomite, zinc oxide, calcined talc powder, and zirconium silicate is as follows: 80% are 1-10 micrometers, 15% are 10-20 micrometers, and 5% are 20-40 micrometers.

[0038] Zirconium silicate is modified using a method that includes the following steps:

[0039] Preparation of S21 zirconium silicate slurry: Zirconium silicate and titanate coupling agent are mixed in a mass ratio of 1000:6 to form a mixture, and then water is added to make a slurry with a mass concentration of 85% for grinding to form zirconium silicate slurry;

[0040] Preparation of S22 titanium dioxide slurry: Titanium dioxide, titanate coupling agent, and silica sol are mixed in a mass ratio of 1000:6:15, and then water is added and stirred to prepare a titanium dioxide slurry with a mass concentration of 75%. The titanium dioxide particles have a particle size of 1-3 micrometers.

[0041] S23. The zirconium silicate slurry obtained in step S21 is mixed with the titanium dioxide slurry obtained in step S22 at a mass ratio of 20:2 to obtain a mixed slurry. The mixture is stirred evenly, filtered, dried, ball-milled, and sieved to obtain modified zirconium silicate. The particle size distribution of the modified zirconium silicate particles is 80% for 1-10 micrometers, 15% for 10-20 micrometers, and 5% for 20-40 micrometers.

[0042] Example 3

[0043] A glaze suitable for large rectangular basins comprises the following raw materials in parts by weight: 20 parts potassium feldspar, 30 parts quartz powder, 6 parts calcined kaolin, 3 parts alumina powder, 3 parts calcite, 3 parts dolomite, 1 part zinc oxide, 2 parts calcined talc powder, and 8.5 parts zirconium silicate. The particle size distribution of the potassium feldspar, quartz powder, calcined kaolin, alumina powder, calcite, dolomite, zinc oxide, calcined talc powder, and zirconium silicate is as follows: 75% is 1-10 micrometers, 18% is 10-20 micrometers, and 7% is 20-40 micrometers.

[0044] Zirconium silicate is modified using a method that includes the following steps:

[0045] Preparation of S21 zirconium silicate slurry: Zirconium silicate and titanate coupling agent are mixed in a mass ratio of 1000:5 to form a mixture, and then water is added to make a slurry with a mass concentration of 83% for grinding to form zirconium silicate slurry;

[0046] Preparation of S22 titanium dioxide slurry: Titanium dioxide, titanate coupling agent, and silica sol are mixed in a mass ratio of 1000:5:12, and then water is added and stirred to prepare a titanium dioxide slurry with a mass concentration of 73%. The titanium dioxide particles have a particle size of 1-3 micrometers.

[0047] S23. The zirconium silicate slurry obtained in step S21 is mixed with the titanium dioxide slurry obtained in step S22 at a mass ratio of 20:1-2 to obtain a mixed slurry. The mixture is stirred evenly, filtered, dried, ball-milled, and sieved to obtain modified zirconium silicate. The particle size distribution of the modified zirconium silicate particles is 75% for 1-10 micrometers, 18% for 10-20 micrometers, and 7% for 20-40 micrometers.

[0048] Comparative Example 1

[0049] Similar to Example 3, except that the particle size distribution of the potassium feldspar, the quartz powder, the calcined kaolin, the alumina powder, the calcite, the dolomite, the zinc oxide, the calcined talc powder, and the zirconium silicate is 5% for 1-10 micrometers, 10% for 10-20 micrometers, and 85% for 20-40 micrometers.

[0050] Comparative Example 2

[0051] Same as Example 3, except that an equal amount of zirconium silicate is used instead of the modified zirconium silicate.

[0052] Preparation Example 1

[0053] A method for preparing a glaze suitable for large rectangular basins, using the raw materials in the indicated mass proportions of Example 1, includes the following steps:

[0054] S1 Mixing: Mix 18 kg of potassium feldspar, 27 kg of quartz powder, 5 kg of calcined kaolin, 2 kg of alumina powder, 2 kg of calcite, 2 kg of dolomite, 0.7 kg of zinc oxide, 1.5 kg of calcined talc powder and 7 kg of zirconium silicate evenly to obtain the glaze.

[0055] S2 Glaze Slurry Preparation: Place the glaze material into a stirring device, add water and stir to mix to obtain a glaze slurry. The performance parameters of the glaze slurry are: specific gravity of 1.745 kg / L and viscosity of 120 seconds / 100 mL.

[0056] S3 Spray Glazing: A layer of glaze is sprayed onto the surface of a thin-edged, long, rectangular ceramic blank with a thickness of 5mm after the surface layer has dried. The spraying is carried out using automated spraying equipment with a spraying pressure of 0.70MPa, resulting in a glazed product with a glaze layer thickness of 0.6mm.

[0057] S4 Firing: After drying the glazed product at 140℃, it is placed in a kiln for firing. The firing process is as follows: the temperature is increased from room temperature to 600℃ at a rate of 3℃ / min and held for 30min, then increased to 950-1000℃ at a rate of 4℃ / min and held for 30min, and finally increased to 1220℃ at a rate of 2℃ / min and held for 50min. The product is then naturally cooled to room temperature to obtain the large long basin ceramic glazed product.

[0058] Preparation Example 2

[0059] A method for preparing a glaze suitable for large rectangular basins, using the raw materials in the indicated mass proportions of Example 2, includes the following steps:

[0060] S1 Mixing: Mix 22 kg of potassium feldspar, 33 kg of quartz powder, 7 kg of calcined kaolin, 4 kg of alumina powder, 4 kg of calcite, 4 kg of dolomite, 1.3 kg of zinc oxide, 3 kg of calcined talc powder and 10 kg of zirconium silicate evenly to obtain the glaze.

[0061] S2 Glaze Slurry Preparation: Place the glaze material into a stirring device, add water and stir to mix to obtain the glaze slurry. The performance parameters of the glaze slurry are: specific gravity of 1.755 kg / L and viscosity of 140 seconds / 100 mL.

[0062] S3 glazing: A layer of glaze is sprayed onto the surface of a thin-edged, long, rectangular ceramic blank with a thickness of 5mm after the surface layer has dried. The spraying is carried out using automated spraying equipment with a spraying pressure of 0.80MPa, resulting in a glazed product with a glaze layer thickness of 0.8mm.

[0063] S4 Firing: After drying the glazed product at 140℃, it is placed in a kiln for firing. The firing process is as follows: the temperature is increased from room temperature to 650℃ at a rate of 4℃ / min and held for 30min, then increased to 1000℃ at a rate of 5℃ / min and held for 60min, and finally increased to 1240℃ at a rate of 3℃ / min and held for 50min. The product is then naturally cooled to room temperature to obtain the large long basin ceramic glazed product.

[0064] Preparation Example 3

[0065] A method for preparing a glaze suitable for large rectangular basins, using the raw materials in the indicated mass proportions of Example 3, includes the following steps:

[0066] S1 Mixing: Mix 20 kg of potassium feldspar, 30 kg of quartz powder, 6 kg of calcined kaolin, 3 kg of alumina powder, 3 kg of calcite, 3 kg of dolomite, 1 kg of zinc oxide, 2 kg of calcined talc powder and 8.5 kg of zirconium silicate evenly to obtain the glaze.

[0067] S2 Glaze Slurry Preparation: Place the glaze material into a stirring device, add water and stir to mix to obtain a glaze slurry. The performance parameters of the glaze slurry are: specific gravity of 1.750 kg / L and viscosity of 130 seconds / 100 mL.

[0068] S3 glazing: A layer of glaze is sprayed onto the surface of a thin-edged, long ceramic pot with a thickness of 5mm after the surface layer has dried. The spraying is carried out using automated spraying equipment with a spraying pressure of 0.75MPa, resulting in a glazed product with a glaze layer thickness of 0.7mm.

[0069] S4 Firing: After drying the glazed product at 140℃, it is placed in a kiln for firing. The firing process is as follows: the temperature is increased from room temperature to 630℃ at a rate of 3.5℃ / min and held for 30 minutes, then increased to 980℃ at a rate of 4.5℃ / min and held for 50 minutes, and finally increased to 1230℃ at a rate of 2.5℃ / min and held for 40 minutes. The product is then naturally cooled to room temperature to obtain the large long basin ceramic glazed product.

[0070] Preparation Example 4

[0071] The preparation method is the same as in Preparation Example 3, except that the materials used in Comparative Example 1 are employed.

[0072] Preparation Example 5

[0073] The preparation method is the same as in Preparation Example 3, except that the materials used in Comparative Example 2 are employed.

[0074] Performance testing

[0075] Samples of the ceramic glaze surface of the large long basin prepared in Examples 1-5 were taken and tested respectively. The thin-edged ceramic blank of the large long basin with a thickness of 5 mm after firing was used as a reference example. The test results are shown in Table 1.

[0076] Firing shrinkage rate: The prepared powder is isostatically pressed into shape under a specified pressure, then fired in a kiln, and the shrinkage rate is measured. The formula for calculating the shrinkage rate is (Rbefore - Rafter) / Rbefore * 100%.

[0077] Gloss: The gloss of ceramics is measured by testing each sample individually under 60° geometric conditions using a gloss meter. The instrument emits a beam of light that shines onto the ceramic surface, measures the amount of reflected light, and then displays the result as a value. Generally, the higher the value, the better the gloss.

[0078] Autoclave: Increase to 1.0 MPa in 1 hour and maintain for 1 hour. After venting, cool for 1 hour and remove for inspection for cracks.

[0079] Crack resistance: Tested according to GB / T 3810.11-2016 Ceramic Tile Test Methods Part 11: Determination of glaze crack resistance of glazed tiles.

[0080] Table 1

[0081]

[0082] Combining Preparation Examples 1-3 and 4-5, and referring to Table 1, it can be seen that the firing shrinkage rate, autoclave resistance, crack resistance, and gloss of the ceramic glaze of the large long basin in Preparation Examples 1-3 are all superior to those in Preparation Examples 4-5. This indicates that the ceramic glaze of the large long basin prepared using the formula of this application has a better low firing shrinkage rate and a gloss of 98-105 GU, indicating that the glaze surface is smooth, without obvious defects such as pores, and has a high refractive index. It is also crack-resistant; the glaze surface does not crack at 160℃, indicating good thermal stability. After four autoclave cycles, it does not crack, indicating good thermal stability and better compatibility with the main body slurry of the large long basin, solving problems such as potential frost damage and subsequent glaze cracking.

[0083] Combining the preparation examples 1-3 and the control examples, and referring to Table 1, it can be seen that the firing shrinkage rate, autoclave resistance, and crack resistance of the ceramic glaze surface of the large long basins in preparation examples 1-3 are very close to those of the control examples, indicating that the glaze of this application is very well matched with the thin-edged large long basin ceramic blanks.

[0084] Combining Preparation Examples 1-3 and 4, and referring to Table 1, it can be seen that the particle size of the raw material is larger than that of Preparation Examples 1-3. The firing shrinkage rate, autoclave properties, crack resistance, and gloss of the obtained large long basin ceramic glaze are poor. This is mainly due to the large particle size of the raw material. After spraying, the obtained large long basin ceramic glaze has poor density and porosity, resulting in a high firing shrinkage rate. It is not compatible with the main body slurry of the large long basin, and cracks appear when testing autoclave properties and crack resistance.

[0085] Combining Preparation Examples 1-3 and Preparation Example 5, and referring to Table 1, it can be seen that, based on the analysis of Preparation Example 5, the shrinkage rate, autoclave performance, crack resistance, and gloss of the samples in Examples 1-3 are superior to those in Preparation Example 5. This indicates that the modification of zirconium silicate with titanium dioxide helps to reduce the firing shrinkage rate of the glaze layer, prevent the glaze layer from yellowing, improve the gloss of the glaze layer, and extend its lifespan.

[0086] The above embodiments and preparation examples are only used to explain the technical solutions of the present invention and not to limit it. Although the above embodiments and preparation examples have specifically described the present invention, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications and equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A glaze suitable for use in a long pot process, characterised in that, The raw materials include the following mass fractions: 18-22 parts of potassium feldspar, 27-33 parts of quartz powder, 5-7 parts of calcined kaolin, 2-4 parts of aluminum oxide powder, 2-4 parts of calcite, 2-4 parts of dolomite, 0.7-1.3 parts of zinc oxide, 1.5-3 parts of calcined talc powder, and 7-10 parts of modified zirconium silicate, wherein the particle size distribution of the potassium feldspar, the quartz powder, the calcined kaolin, the aluminum oxide powder, the calcite, the dolomite, the zinc oxide, the calcined talc powder, and the modified zirconium silicate is 70-80% of 1-10 microns, 15-20% of 10-20 microns, and 5-10% of 20-40 microns; The preparation method of the modified zirconium silicate comprises the following steps: S21 Preparation of zirconium silicate slurry: zirconium silicate and titanate coupling agent are mixed in a mass ratio of 1000:4-6 to form a mixture, then water is added to prepare a slurry with a mass concentration of 80-85% for grinding to form a zirconium silicate slurry; S22 Preparation of titanium dioxide slurry: titanium dioxide, titanate coupling agent, and silica sol are mixed in a mass ratio of 1000:4-6:10-15, then water is added for stirring to prepare a titanium dioxide slurry with a mass concentration of 70-75%, wherein the particle size of the titanium dioxide is 1-3 microns; S23 The zirconium silicate slurry prepared in step S21 and the titanium dioxide slurry prepared in step S22 are mixed in a mass ratio of 20:1-2 to obtain a mixed slurry, which is uniformly stirred, filtered, dried, ball milled, and sieved to obtain modified zirconium silicate.

2. A method of producing a large elongated ceramic glazed article, characterized by, The raw materials of each mass fraction in the glaze suitable for the long pot process are prepared according to claim 1, and the preparation method comprises the following steps: S1 Mixing: the potassium feldspar, the quartz powder, the calcined kaolin, the aluminum oxide powder, the calcite, the dolomite, the zinc oxide, the calcined talc powder, and the modified zirconium silicate are sieved, weighed, and uniformly mixed according to the formula to obtain the glaze; S2 Preparation of glaze slurry: the glaze is placed in a stirring device and mixed with water to obtain a glaze slurry; S3 Glazing: a layer of glaze slurry is sprayed on the surface of the long pot precision blank to obtain a glazed product; S4 Firing: after the glazed product is dried at 140°C, it is loaded into a kiln for firing, and then naturally cooled to room temperature to obtain a long pot ceramic glaze product.

3. The method of claim 2, wherein the ceramic glaze is applied to the large elongated vessel by a method selected from the group consisting of spraying, dipping, and brushing. In step S2 of preparing the glaze slurry, the performance parameters of the glaze slurry are as follows: specific gravity of 1.745 kg / L-1.755 kg / L, and viscosity of 120-140 seconds / 100 mL.

4. The method of claim 2, wherein the ceramic glaze is applied to the large elongated ceramic body by a method selected from the group consisting of spraying, dipping, and brushing. In step S3 of glazing, the spraying is performed using an automatic spraying device, and the spraying pressure is 0.70-0.80 MPa.

5. The method of claim 2, wherein the ceramic glaze is applied to the large elongated ceramic body by a method selected from the group consisting of spraying, dipping, and brushing. In step S3 of glazing, the glaze layer thickness of the glazed product is 0.6-0.8 mm.

6. The method of claim 2, wherein the ceramic glaze is applied to the large elongated vessel by a spray coating method. In step S3 of glazing, the precision blank is a thin-edged long pot ceramic precision blank with a dry surface layer, and the wall thickness is 5 mm.

7. The method of claim 2, wherein the ceramic glaze is applied to the large elongated ceramic body by a method selected from the group consisting of spraying, dipping, and brushing. In the sintering in step S4, the sintering process is as follows: increasing the temperature from room temperature to 600-650 ℃ at a temperature increasing rate of 3-4 ℃ / min and keeping for 30 min, then increasing the temperature to 950-1000 ℃ at a temperature increasing rate of 4-5 ℃ / min and keeping for 30-60 min, and finally increasing the temperature to 1220-1240 ℃ at a temperature increasing rate of 2-3 ℃ / min and keeping for 30-50 min, to obtain the large-length basin ceramic glazed product.

8. The method of claim 2, wherein the ceramic glaze is applied to the large elongated vessel by a method selected from the group consisting of spraying, dipping, and brushing. The sintering shrinkage rate of the large-length basin ceramic glazed product is 5.0-7.0%.

9. The method for preparing a large, elongated ceramic glazed product according to claim 2, characterized in that, The glossiness of the large-length basin ceramic glazed product is 98-105 GU.

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