A method for manufacturing shino enamel ceramic ware
By using specific raw material ratios and firing processes, the problems of crazing and poor bonding in Shino glaze have been solved, enabling high-quality production of Shino glaze ceramics and meeting the requirements of large-scale and standardized production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUHAN YUMEI CERAMICS CULTURE DEVELOPMENT CO LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-06-05
AI Technical Summary
In the current process of preparing Shino glaze, unreasonable raw material ratios result in poor glaze cracking, a dry texture, and weak bonding between the glaze layer and the body, leading to unstable product quality and making it difficult to achieve large-scale, standardized production.
Shino glaze raw materials, composed of nepheline, albite, spodumene, kaolin, and sodium bicarbonate in a specific ratio, are wet-ground to 200-300 mesh, with a glaze thickness of 2 mm. The glaze is then fired in a reducing atmosphere at 1310℃, with the carbon monoxide volume fraction controlled at 5%-8%, and slowly cooled to obtain Shino glaze ceramic ware.
It improves the glaze cracking effect and enhances the bonding between the glaze layer and the ceramic body, thus achieving product quality stability and large-scale, standardized production.
Smart Images
Figure CN122145037A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ceramic preparation technology, and in particular to a method for preparing Shino glaze ceramic vessels. Background Technology
[0002] Shino glaze is a highly distinctive high-temperature glaze type in ceramics, originating in Japan. Its glaze surface is warm and smooth like jade, often accompanied by natural crackle patterns and mottled colors. The ceramic ware made from it has both practical and artistic value and is very popular in the market.
[0003] Currently, Shino glaze belongs to high-temperature reduction glaze, and its preparation process has extremely high requirements for raw material ratio, firing temperature, and atmosphere control.
[0004] In the existing preparation process of Shino glaze, the glaze surface cracking effect is often poor and the texture is dry due to unreasonable raw material ratio. Furthermore, improper control of firing parameters results in poor bonding between the glaze layer and the body, leading to unstable product quality, large batch differences, and difficulty in achieving large-scale and standardized production. Summary of the Invention
[0005] The purpose of this invention is to provide a method for preparing Shino glaze ceramic ware, aiming to solve the technical problems in the prior art, such as poor glaze cracking effect and dry texture due to unreasonable raw material ratio, and poor bonding between glaze layer and body due to improper control of firing parameters, resulting in unstable product quality, large batch differences, and difficulty in achieving large-scale and standardized production.
[0006] To achieve the above objectives, the present invention provides a method for preparing Shino-glazed ceramic vessels, comprising the following steps:
[0007] The raw materials for Shino glaze are obtained. Shino glaze is composed of nepheline, albite, spodumene, kaolin, and sodium bicarbonate.
[0008] All the obtained Shino glaze raw materials were put into a ball mill for wet grinding until the particle size of the raw materials was 200-300 mesh, and glaze slurry was obtained.
[0009] Clean the ceramic unglazed body and apply glaze to the surface of the ceramic unglazed body with a glaze thickness of 2mm.
[0010] The glazed ceramic blank is sent into the kiln, heated to 1310℃ and maintained at that temperature, and then reduced and fired by applying air pressure and closing the gate. The volume fraction of carbon monoxide in the reducing atmosphere is controlled at 5%~8%. After firing, the ceramic is cooled to room temperature in the kiln to obtain Shino glaze ceramic ware.
[0011] In the step of obtaining Shino glaze raw materials, which consist of nepheline, albite, spodumene, kaolin, and sodium bicarbonate:
[0012] The composition and amount of Shino glaze raw materials are clearly defined. Shino glaze raw materials consist of 38 parts nepheline, 106 parts albite, 23 parts spodumene, 19 parts kaolinite and 7 parts sodium bicarbonate.
[0013] Nepheline, albite, spodumene, and kaolin were placed in a drying oven and dried at 105℃~110℃ for 2~3 hours to remove the adsorbed moisture from the raw materials. Sodium bicarbonate was placed separately in a dry and ventilated container.
[0014] All the weighed raw materials are placed into a container, with the five raw materials evenly distributed.
[0015] In the step of wet grinding all the obtained Shino glaze raw materials in a ball mill until the particle size of the raw materials is 200-300 mesh to obtain glaze slurry:
[0016] The mass ratio of grinding balls, raw materials, and deionized water is controlled at 1:1.2~1.5:0.8~1.0. First, put the grinding balls into the grinding jar, then pour the five kinds of pretreated Shino glaze raw materials evenly into the grinding jar, and slowly add deionized water.
[0017] Start the ball mill for wet grinding. Stop the machine every 2 hours during the grinding process, open the grinding jar to take a sample, observe the fineness of the raw material particles, and stir the mixture in the jar to grind the raw material evenly.
[0018] When sampling and testing reveals that the particle size of the raw material reaches 200-300 mesh, and the particles are uniform with no obvious coarse particles, the ball mill should be stopped.
[0019] Open the grinding jar, pour the ground mixture into a special filter sieve, filter to remove residual coarse particles and impurities, collect the filtered fine mixture to obtain glaze slurry.
[0020] In the step of cleaning the ceramic unglazed body and applying glaze to the surface of the ceramic unglazed body with a glaze thickness of 2mm:
[0021] The ceramic blank is selected, specifically a high-temperature white porcelain blank. The blank surface is smooth, intact, and free of impurities, and the water absorption rate of the blank is controlled between 0.5% and 1.0%.
[0022] Clean the ceramic unglazed body by slowly blowing the surface of the unglazed body with a high-pressure air gun to remove the dust and fine impurities attached to the surface. For oil stains on the surface of the unglazed body, use a clean soft cloth dipped in a small amount of anhydrous ethanol to gently wipe it. After wiping, put the unglazed body in a ventilated and dry place to air dry naturally for 1 to 2 hours.
[0023] The ceramic unglazed body is dipped in glaze, and the glaze thickness is controlled to be within 2 mm.
[0024] After the glazing is completed, place the unglazed body in a well-ventilated and dry place to air dry naturally for 24 hours before spraying glaze.
[0025] In the step of glazing the ceramic bisque, controlling the glaze thickness to within 2mm, and using one of the following glazing methods: pouring glaze, dipping glaze, or spraying glaze:
[0026] When immersing the unglazed body, use a clamp to hold the unglazed body and slowly immerse it in the glaze. Control the immersion time to 3-5 seconds so that the glaze is evenly applied to the surface of the unglazed body. When removing it, slowly lift it out. When spraying the glaze, adjust the distance between the spraying equipment and the unglazed body and spray the glaze evenly to ensure that all parts of the unglazed body are covered with the glaze.
[0027] In the process of placing the glazed ceramic bisque into a kiln, heating it to 1310℃ and maintaining that temperature, and then firing it by applying pressure and closing the gate, with the volume fraction of carbon monoxide in the reducing atmosphere controlled at 5%~8%, and then cooling it to room temperature in the kiln after firing, the following steps are used to obtain Shino-glazed ceramic ware:
[0028] After drying, place the glazed ceramic blanks steadily into the kiln, start the kiln, turn on the temperature control system, and gradually raise the temperature inside the kiln from room temperature to 1310℃ at a heating rate of 5~8℃ / min. During the heating process, monitor the temperature change inside the kiln in real time, and the temperature rises evenly.
[0029] When the temperature inside the kiln reaches 1310℃, the atmosphere conditioning system is activated to introduce reducing gas into the kiln, controlling the volume fraction of carbon monoxide in the reducing atmosphere inside the kiln to be between 5% and 8%, while maintaining the temperature inside the kiln at a stable 1310℃ for reduction firing.
[0030] After the heat preservation is completed, turn off the heating device and reducing gas inlet device of the kiln, keep the kiln door closed, and let the glazed unglazed body cool slowly with the kiln. At a cooling rate of 3~5℃ / min, reduce the temperature inside the kiln from 1310℃ to 500℃.
[0031] Once the temperature inside the kiln has completely dropped to room temperature, slowly open the kiln door, remove the ceramic ware, check the appearance quality of the ceramic ware, and discard products with defects such as cracks, glaze peeling, pinholes, and glaze shrinkage. Qualified products are finished Shino glaze ceramic ware.
[0032] In the reduction firing process, when the kiln temperature reaches 1310℃, the atmosphere conditioning system is activated to introduce reducing gas into the kiln, controlling the volume fraction of carbon monoxide in the reducing atmosphere to be between 5% and 8%, while simultaneously maintaining the kiln temperature at a stable 1310℃.
[0033] During the reduction firing process, the atmosphere concentration and temperature inside the kiln are monitored in real time, and the amount of reducing gas introduced is adjusted in a timely manner. The holding time is controlled at 2-3 hours.
[0034] Among the steps, after the heat preservation is completed, the heating device and reducing gas inlet device of the kiln are turned off, the kiln door is kept closed, and the glazed unglazed body is allowed to cool slowly with the kiln, at a cooling rate of 3~5℃ / min, to reduce the temperature inside the kiln from 1310℃ to 500℃:
[0035] Once the temperature inside the kiln drops below 500℃, turn off the temperature monitoring system, keep the kiln door half-open, and allow the kiln to cool naturally to room temperature.
[0036] This invention discloses a method for preparing Shino glaze ceramic ware, comprising the following steps: obtaining Shino glaze raw materials, which are composed of nepheline, albite, spodumene, kaolin, and sodium bicarbonate; feeding all the obtained Shino glaze raw materials into a ball mill for wet grinding until the particle size is 200-300 mesh, obtaining a glaze slurry; cleaning the ceramic bisque body, applying the glaze slurry to the surface of the ceramic bisque body with a glaze thickness of 2 mm; sending the glazed ceramic bisque body into a kiln, heating it to 1310℃ and maintaining this temperature, and firing it by applying pressure and closing the gate, wherein the volume fraction of carbon monoxide in the reducing atmosphere is controlled at 5%-8%; cooling it to room temperature with the kiln after firing to obtain Shino glaze ceramic ware. This method solves the problems of unreasonable raw material ratios and precise control of key firing parameters, effectively improves the glaze cracking effect, makes the glaze surface warm and smooth, enhances the bonding tightness between the glaze layer and the ceramic body, and achieves large-scale, standardized production. Attached Figure Description
[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0038] Figure 1 This is a flowchart of the preparation method of the Shino glaze ceramic vessel of the present invention.
[0039] Figure 2 This is a flowchart of steps S100 of the present invention.
[0040] Figure 3 This is a flowchart of steps S200 of the present invention.
[0041] Figure 4 This is a flowchart of steps S300 of the present invention.
[0042] Figure 5 This is a flowchart of steps S400 of the present invention. Detailed Implementation
[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.
[0044] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.
[0045] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0046] Please see Figures 1-5 This invention provides a method for preparing Shino glaze ceramic vessels, comprising the following steps:
[0047] S100: Obtain Shino glaze raw materials, which are composed of nepheline, albite, spodumene, kaolin, and sodium bicarbonate.
[0048] In this embodiment, the raw material for Shino glaze is obtained. The raw material for Shino glaze consists of nepheline, albite, spodumene, kaolin, and sodium bicarbonate. The specific process is as follows:
[0049] S101: Specify the composition and amount of Shino glaze raw materials, wherein the Shino glaze raw materials consist of 38 parts nepheline, 106 parts albite, 23 parts spodumene, 19 parts kaolinite and 7 parts sodium bicarbonate.
[0050] S102: Place nepheline, albite, spodumene, and kaolin into a drying oven and dry them at 105℃~110℃ for 2~3 hours to remove the adsorbed moisture from the raw materials. Sodium bicarbonate is placed separately in a dry and ventilated container.
[0051] S103: Place all weighed raw materials into a container, ensuring the five raw materials are evenly distributed.
[0052] In the above process, the composition and amount of Shino glaze raw materials are first clarified. The Shino glaze raw materials consist of 38 parts nepheline, 106 parts albite, 23 parts spodumene, 19 parts kaolin, and 7 parts sodium bicarbonate. Then, nepheline, albite, spodumene, and kaolin are placed in a drying oven and dried at 105℃~110℃ for 2~3 hours to remove the adsorbed moisture from the raw materials. Sodium bicarbonate is placed separately in a dry and ventilated container. Finally, all the weighed raw materials are placed in a container, with the five raw materials evenly distributed.
[0053] S200: All the obtained Shino glaze raw materials are put into a ball mill for wet grinding until the particle size of the raw materials is 200~300 mesh, and glaze slurry is obtained.
[0054] In this embodiment, all the obtained Shino glaze raw materials are put into a ball mill for wet grinding until the particle size of the raw materials is 200-300 mesh, and glaze slurry is obtained. The specific process is as follows:
[0055] S201: Control the mass ratio of grinding balls, raw materials, and deionized water to 1:1.2~1.5:0.8~1.0. First, put the grinding balls into the grinding jar, then pour the pretreated five kinds of Shino glaze raw materials evenly into the grinding jar, and slowly add deionized water.
[0056] S202: Start the ball mill and perform wet grinding. Stop the machine every 2 hours during the grinding process, open the grinding jar to take a sample, observe the fineness of the raw material particles, and at the same time stir the mixture in the jar to grind the raw material evenly.
[0057] S203: When sampling and testing reveals that the particle size of the raw material reaches 200-300 mesh, and the particles are uniform with no obvious coarse particles, stop the ball mill.
[0058] S204: Open the grinding jar, pour the ground mixture into a special filter sieve, filter to remove residual coarse particles and impurities, collect the filtered fine mixture to obtain glaze slurry.
[0059] In the above process, the mass ratio of grinding balls, raw materials, and deionized water is first controlled at 1:1.2~1.5:0.8~1.0. The grinding balls are first placed in the grinding jar, and the five kinds of pretreated Shino glaze raw materials are evenly poured into the grinding jar, and deionized water is slowly added. Then, the ball mill is started for wet grinding. During the grinding process, the machine is stopped every 2 hours, the grinding jar is opened to take samples, and the fineness of the raw material particles is observed. At the same time, the mixture in the jar is stirred to grind the raw materials evenly. When the sampling test shows that the particle size of the raw material reaches 200~300 mesh and the particles are uniform without obvious coarse particles, the ball mill is stopped. Then, the grinding jar is opened, and the ground mixture is poured into a special filter screen to filter out the residual coarse particles and impurities. The filtered fine mixture is collected to obtain the glaze slurry.
[0060] S300: Clean the ceramic unglazed body and apply glaze to the surface of the ceramic unglazed body with a glaze thickness of 2mm.
[0061] In this embodiment, the ceramic unglazed body is cleaned, and glaze is applied to its surface to a thickness of 2 mm. The specific process is as follows:
[0062] S301: Select ceramic bisque, wherein the ceramic bisque is selected from high-temperature white porcelain bisque, the surface of the bisque is smooth, intact and free of impurities, and the water absorption rate of the bisque is controlled at 0.5%~1.0%;
[0063] S302: Clean the ceramic unglazed body. Use a high-pressure air gun to slowly blow the surface of the unglazed body to remove the dust and fine impurities attached to the surface. For oil stains on the surface of the unglazed body, use a clean soft cloth dipped in a small amount of anhydrous ethanol to gently wipe it. After wiping, put the unglazed body in a ventilated and dry place and let it air dry naturally for 1 to 2 hours.
[0064] S303: Apply glaze to the unglazed ceramic body, controlling the glaze thickness to be within 2mm;
[0065] S304: After the glazing is completed, place the unglazed body in a ventilated and dry place and let it air dry naturally for 24 hours before spraying glaze.
[0066] In the above process, firstly, a ceramic bisque is selected, specifically a high-temperature white porcelain bisque with a smooth, intact surface free of impurities. The water absorption rate of the bisque is controlled between 0.5% and 1.0%. Next, the ceramic bisque is cleaned by slowly blowing the surface with a high-pressure air gun to remove dust and fine impurities. For oil stains on the surface, a clean, soft cloth dampened with a small amount of anhydrous ethanol is used to gently wipe them. After wiping, the bisque is placed in a well-ventilated and dry place to air dry naturally for 1-2 hours. Then, the ceramic bisque is glazed, with the glaze thickness controlled to within 2 mm. The glazing method is one of pouring, dipping, or spraying. After glazing, the bisque is placed in a well-ventilated and dry place to air dry naturally for 4-6 hours.
[0067] Specifically: during glazing, clamps are used to hold the unglazed body and slowly immerse it in the glaze slurry, controlling the immersion time to be 3-5 seconds, so that the surface of the unglazed body is evenly coated with the glaze slurry, and it is slowly lifted out when it is taken out; during spraying, the distance between the spraying equipment and the unglazed body is adjusted, and the glaze slurry is sprayed evenly to ensure that all parts of the unglazed body are covered with the glaze slurry.
[0068] S400: The glazed ceramic unglazed body is sent into the kiln, heated to 1310℃ and maintained at this temperature, and then reduced and fired by applying air pressure and closing the gate. The volume fraction of carbon monoxide in the reducing atmosphere is controlled at 5%~8%. After firing, the ceramic is cooled to room temperature in the kiln to obtain Shino glaze ceramic ware.
[0069] In this embodiment, the glazed ceramic bisque is placed in a kiln, heated to 1310°C and maintained at that temperature, and then reduced-fired by applying pressure and closing the gate. The volume fraction of carbon monoxide in the reducing atmosphere is controlled at 5%~8%. After firing, the ceramic is cooled to room temperature in the kiln to obtain Shino-glazed ceramic ware. The specific process is as follows:
[0070] S401: Place the dried glazed ceramic blank into the kiln steadily, start the kiln, turn on the temperature control system, and gradually raise the temperature inside the kiln from room temperature to 1310℃ at a heating rate of 5~8℃ / min. During the heating process, monitor the temperature change inside the kiln in real time and ensure that the temperature rises evenly.
[0071] S402: When the temperature inside the kiln reaches 1310℃, start the atmosphere conditioning system, introduce reducing gas into the kiln, control the volume fraction of carbon monoxide in the reducing atmosphere inside the kiln to 5%~8%, and at the same time maintain the temperature inside the kiln at 1310℃ for reduction firing.
[0072] S403: After the heat preservation is completed, turn off the heating device and reducing gas inlet device of the kiln, keep the kiln door closed, and let the glazed unglazed body cool slowly with the kiln. At a cooling rate of 3~5℃ / min, reduce the temperature inside the kiln from 1310℃ to 500℃.
[0073] S404: After the temperature inside the kiln has completely dropped to room temperature, slowly open the kiln door, take out the ceramic ware, check the appearance quality of the ceramic ware, and reject products with defects such as cracks, glaze peeling, pinholes, and glaze shrinkage. Qualified products are finished Shino glaze ceramic ware.
[0074] In the above process, the dried glazed ceramic unglazed body is first placed steadily into the kiln. The kiln is then started, and the temperature control system is activated. The kiln temperature is gradually increased from room temperature to 1310℃ at a heating rate of 5~8℃ / min. During the heating process, the temperature change inside the kiln is monitored in real time, and the temperature rises evenly. When the kiln temperature reaches 1310℃, the atmosphere conditioning system is activated, and reducing gas is introduced into the kiln to control the volume fraction of carbon monoxide in the reducing atmosphere at 5%~8%, while maintaining a stable kiln temperature of 1310℃ for reduction firing. During the reduction firing process, the atmosphere concentration and temperature inside the kiln are monitored in real time, and the reducing gas is adjusted as needed. The amount of gas introduced into the kiln and the holding time are controlled at 2-3 hours. After the holding time is completed, the heating device and reducing gas introduction device of the kiln are turned off, the kiln door is kept closed, and the glazed unglazed body is allowed to cool slowly with the kiln. The temperature inside the kiln is reduced from 1310℃ to 500℃ at a cooling rate of 3-5℃ / min. When the temperature inside the kiln drops below 500℃, the temperature monitoring system is turned off, the kiln door is kept half open, and the kiln is allowed to cool naturally to room temperature. When the temperature inside the kiln has completely dropped to room temperature, the kiln door is slowly opened, the ceramic ware is taken out, and the appearance quality of the ceramic ware is checked. Products with glaze cracks, glaze peeling, pinholes, and glaze shrinkage defects are rejected. Qualified products are finished Shino glaze ceramic ware.
[0075] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.
[0076] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.
Claims
1. A method for preparing Shino-glazed ceramic vessels, characterized in that, Includes the following steps: The raw materials for Shino glaze are obtained. Shino glaze is composed of nepheline, albite, spodumene, kaolin, and sodium bicarbonate. All the obtained Shino glaze raw materials were put into a ball mill for wet grinding until the particle size of the raw materials was 200-300 mesh, and glaze slurry was obtained. Clean the ceramic unglazed body and apply glaze to the surface of the ceramic unglazed body with a glaze thickness of 2mm. The glazed ceramic blank is sent into the kiln, heated to 1310℃ and maintained at that temperature, and then reduced and fired by applying air pressure and closing the gate. The volume fraction of carbon monoxide in the reducing atmosphere is controlled at 5%~8%. After firing, the ceramic is cooled to room temperature in the kiln to obtain Shino glaze ceramic ware.
2. The method for preparing Shino-glazed ceramic vessels as described in claim 1, characterized in that, In the step of obtaining Shino glaze raw materials, which are composed of nepheline, albite, spodumene, kaolin, and sodium bicarbonate: The composition and amount of Shino glaze raw materials are clearly defined. Shino glaze raw materials consist of 38 parts nepheline, 106 parts albite, 23 parts spodumene, 19 parts kaolinite and 7 parts sodium bicarbonate. Nepheline, albite, spodumene, and kaolin were placed in a drying oven and dried at 105℃~110℃ for 2~3 hours to remove the adsorbed moisture from the raw materials. Sodium bicarbonate was placed separately in a dry and ventilated container. All the weighed raw materials are placed into a container, with the five raw materials evenly distributed.
3. The method for preparing Shino-glazed ceramic vessels as described in claim 1, characterized in that, In the step of putting all the obtained Shino glaze raw materials into a ball mill for wet grinding until the particle size of the raw materials is 200~300 mesh to obtain glaze slurry: The mass ratio of grinding balls, raw materials, and deionized water is controlled at 1:1.2~1.5:0.8~1.
0. First, put the grinding balls into the grinding jar, then pour the five kinds of pretreated Shino glaze raw materials evenly into the grinding jar, and slowly add deionized water. Start the ball mill for wet grinding. Stop the machine every 2 hours during the grinding process, open the grinding jar to take a sample, observe the fineness of the raw material particles, and stir the mixture in the jar to grind the raw material evenly. When sampling and testing reveals that the particle size of the raw material reaches 200-300 mesh, and the particles are uniform with no obvious coarse particles, the ball mill should be stopped. Open the grinding jar, pour the ground mixture into a special filter sieve, filter to remove residual coarse particles and impurities, collect the filtered fine mixture to obtain glaze slurry.
4. The method for preparing Shino-glazed ceramic vessels as described in claim 1, characterized in that, In the process of cleaning the unglazed ceramic body and applying glaze to its surface with a thickness of 2mm: The ceramic blank is selected, specifically a high-temperature white porcelain blank. The blank surface is smooth, intact, and free of impurities, and the water absorption rate of the blank is controlled between 0.5% and 1.0%. Clean the ceramic unglazed body by slowly blowing the surface of the unglazed body with a high-pressure air gun to remove the dust and fine impurities attached to the surface. For oil stains on the surface of the unglazed body, use a clean soft cloth dipped in a small amount of anhydrous ethanol to gently wipe it. After wiping, put the unglazed body in a ventilated and dry place to air dry naturally for 1 to 2 hours. The ceramic unglazed body is dipped in glaze, and the glaze thickness is controlled to be within 2 mm. After the glazing is completed, place the unglazed body in a well-ventilated and dry place to air dry naturally for 24 hours before spraying glaze.
5. The method for preparing Shino-glazed ceramic vessels as described in claim 4, characterized in that, In the process of glazing the unglazed ceramic body, controlling the glaze thickness to within 2mm, and using one of the following glazing methods: pouring glaze, dipping glaze, or spraying glaze: When immersing the unglazed body, use a clamp to hold the unglazed body and slowly immerse it in the glaze. Control the immersion time to 3-5 seconds so that the glaze is evenly applied to the surface of the unglazed body. When removing it, slowly lift it out. When spraying the glaze, adjust the distance between the spraying equipment and the unglazed body and spray the glaze evenly to ensure that all parts of the unglazed body are covered with the glaze.
6. The method for preparing Shino-glazed ceramic vessels as described in claim 1, characterized in that, In the process of placing the glazed ceramic bisque into a kiln, heating it to 1310℃ and maintaining that temperature, and then firing it by applying pressure and closing the gate, with the volume fraction of carbon monoxide in the reducing atmosphere controlled at 5%~8%, and then cooling it to room temperature in the kiln after firing, the following steps are taken to obtain Shino-glazed ceramic ware: After drying, place the glazed ceramic blanks steadily into the kiln, start the kiln, turn on the temperature control system, and gradually raise the temperature inside the kiln from room temperature to 1310℃ at a heating rate of 5~8℃ / min. During the heating process, monitor the temperature change inside the kiln in real time, and the temperature rises evenly. When the temperature inside the kiln reaches 1310℃, the atmosphere conditioning system is activated to introduce reducing gas into the kiln, controlling the volume fraction of carbon monoxide in the reducing atmosphere inside the kiln to be between 5% and 8%, while maintaining the temperature inside the kiln at a stable 1310℃ for reduction firing. After the heat preservation is completed, turn off the heating device and reducing gas inlet device of the kiln, keep the kiln door closed, and let the glazed unglazed body cool slowly with the kiln. At a cooling rate of 3~5℃ / min, reduce the temperature inside the kiln from 1310℃ to 500℃. Once the temperature inside the kiln has completely dropped to room temperature, slowly open the kiln door, remove the ceramic ware, check the appearance quality of the ceramic ware, and discard products with defects such as cracks, glaze peeling, pinholes, and glaze shrinkage. Qualified products are finished Shino glaze ceramic ware.
7. The method for preparing Shino-glazed ceramic vessels as described in claim 6, characterized in that, When the temperature inside the kiln reaches 1310℃, the atmosphere conditioning system is activated to introduce reducing gas into the kiln, controlling the volume fraction of carbon monoxide in the reducing atmosphere inside the kiln to be between 5% and 8%, while maintaining the kiln temperature stable at 1310℃ for the reduction firing process: During the reduction firing process, the atmosphere concentration and temperature inside the kiln are monitored in real time, and the amount of reducing gas introduced is adjusted in a timely manner. The holding time is controlled at 2-3 hours.
8. The method for preparing Shino-glazed ceramic vessels as described in claim 7, characterized in that, After the heat preservation is completed, turn off the heating device and reducing gas inlet device of the kiln, keep the kiln door closed, and allow the glazed unglazed body to cool slowly with the kiln. In the step of reducing the temperature inside the kiln from 1310℃ to 500℃ at a cooling rate of 3~5℃ / min: Once the temperature inside the kiln drops below 500℃, turn off the temperature monitoring system, keep the kiln door half-open, and allow the kiln to cool naturally to room temperature.