High-hardness anti-oxidation pottery and production method thereof

Abstract

The invention relates to the technical field of clay processing, in particular to high-hardness anti-oxidation pottery and a production method thereof.The pottery comprises a blank, a blank bubble filling solution and glaze liquid; the blank body is prepared by mixing kaolin, bentonite, water glass and water; the blank bubble filling solution comprises the following raw materials: silica sol, methyl cellulose, ethanol and boric acid; the blank bubble filling solution is prepared by the following steps: step 1, selecting 30% of solid content of silica sol; according to the scheme, the binding force and density of the green body are enhanced in the green body preparation stage through the bentonite and the water glass; a specially-made blank bubble filling solution is used for effectively filling bubbles in the blank, and defects are eliminated; the special glaze liquid composed of various high-performance components is adopted, a hard and anti-oxidation protection layer is formed on the surface of the pottery, the hardness and the anti-oxidation performance of the pottery are remarkably improved, the requirement of the market for high-quality pottery is met, and important practical application value and wide market prospects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of clay processing, in particular to high-hardness anti-oxidation pottery and a production method thereof. Background Art

[0002] In the production and application of ceramic products, high-hardness anti-oxidation pottery has always been a product that has attracted much attention. Because of its good physical properties and stable chemical properties, it has a wide range of application needs in many fields such as architectural decoration, daily ceramics, and industrial ceramics.

[0003] In the preparation process of traditional pottery making, only single or simply mixed raw materials, such as ordinary clay, are used. There is a lack of in-depth research and rational application of the synergistic effects between the raw materials, resulting in a loose internal structure and many pores in the green body after molding and firing, making it difficult to achieve a high level of hardness and strength. The traditional production process has limited means to deal with defects such as bubbles in the green body, and fails to fully consider the negative impact of bubbles on the performance of pottery, resulting in uneven quality of the finished products.

[0004] To this end, the present invention proposes a high-hardness antioxidant pottery and a production method, by carefully selecting raw materials such as kaolin, bentonite, water glass and optimizing their ratios, the bonding strength and density of the green body are enhanced in the green body preparation stage; a special green body bubble filling solution is used to effectively fill the bubbles inside the green body and eliminate defects; a special glaze liquid composed of a variety of high-performance ingredients is used, and precise glazing and firing processes are combined to form a hard and antioxidant protective layer on the surface of the pottery. Through the above series of innovative technical means, a significant improvement in the hardness and antioxidant properties of the pottery is achieved, meeting the market demand for high-quality pottery, and having important practical application value and broad market prospects. Summary of the invention

[0005] Technical problem to be solved: Traditional pottery production has limited ability to handle bubbles in the embryo, making it difficult to achieve a high level of hardness and strength.

[0006] In view of the deficiencies in the prior art, the present invention provides a high-hardness anti-oxidation pottery and a production method, thereby solving the technical problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A high-hardness anti-oxidation pottery, the pottery comprising an embryo, an embryo bubble filling solution, and a glaze liquid;

[0009] The embryo body is made by mixing kaolin, bentonite, water glass and water;

[0010] The raw materials of the embryo bubble filling solution include silica sol, methyl cellulose, ethanol and boric acid;

[0011] The embryo bubble filling solution is prepared as follows:

[0012] Step 1, the solid content of the silica sol is selected to be 30%, the amount of methyl cellulose is 1% of the mass of the silica sol, the amount of ethanol is 20% of the volume of the silica sol, and the amount of boric acid is 3% of the mass of the silica sol;

[0013] Step 2: Slowly add the weighed methyl cellulose into an appropriate amount of water and stir to dissolve;

[0014] Step 3, mixing silica sol and ethanol;

[0015] Step 4, adding the weighed boric acid into the mixed solution of silica sol and ethanol;

[0016] Step 5, mixing the solution of step 2 and the solution of step 4;

[0017] The glaze liquid is made of silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, zinc oxide, borax and a colorant.

[0018] In a possible implementation, the embryo body is prepared as follows:

[0019] Step 1: kaolin, pass through a 200-mesh sieve to remove impurities and larger particles; water glass solution with a modulus of 3.0-3.3 and a concentration of 30%-40%; appropriate amount of water;

[0020] Step 2, the mass ratio of bentonite to water is 1:5-8, the stirring speed is controlled at 200-300 rpm, and the stirring time is 30-40 minutes to form a uniform bentonite slurry;

[0021] Step 3, adding 15%-25% of the water glass solution by mass of the bentonite to the bentonite slurry, stirring for 20-30 minutes at a stirring speed of 300-400 rpm to obtain a mixed solution;

[0022] Step 4, mixing kaolin and the mixed solution;

[0023] Step 5: Make the embryo according to the shape and size of the required pottery;

[0024] Step 6: Drying the embryo.

[0025] In a possible implementation, the glaze liquid is prepared as follows:

[0026] Step 1, 50% silicon dioxide, 18% aluminum oxide, 12% calcium oxide, 8% magnesium oxide, 5% zinc oxide, 5% borax, and 2% colorant; sieve quartz powder, industrial aluminum oxide powder, calcite, talcum powder, zinc oxide, borax and other raw materials through a 200-mesh sieve to ensure uniform particle size of the raw materials;

[0027] Step 2: Put the weighed raw materials into a ball mill, add appropriate amount of water and grinding media, mix and grind thoroughly to form a uniform glaze slurry;

[0028] Step 3, adding a binder accounting for 0.8% of the mass of the glaze slurry to the glaze slurry, and stirring at 120 rpm for 30 minutes;

[0029] Step 4: Transfer the glaze slurry to an aging container, seal it, and age it at room temperature for 36 hours.

[0030] In a possible implementation, a method for producing high-hardness anti-oxidation pottery specifically includes the following steps:

[0031] Step 1: treating the embryo bubbles, completely immersing the preliminarily dried ceramic embryo in an embryo bubble filling solution, the immersion time being determined according to the thickness and pore size of the embryo;

[0032] Step 2: After soaking, take the embryo out of the solution and place it on a rack to naturally drain the excess solution;

[0033] Step 3, air-drying the drained embryos for a second time;

[0034] Step 4: Glazing: According to the shape and size of the pottery, choose a suitable glazing method, and control the glazing thickness between 0.1-0.3mm;

[0035] Step 5, firing, placing the glazed body into the kiln, heating it to 350°C at a rate of 5°C / min, keeping it warm for 40 minutes, then heating it to 900°C at a rate of 8°C / min, and then raising the temperature to 1100°C, keeping it warm for 2.5 hours;

[0036] Step 6: Cooling: Allow the pottery in the kiln to cool naturally to room temperature.

[0037] Beneficial effects compared with the prior art:

[0038] 1. In this scheme, the performance of the pottery body is optimized by scientifically selecting raw materials such as kaolin, bentonite, and water glass and making reasonable proportions. Kaolin gives basic plasticity, bentonite enhances the binding force between particles, and water glass reacts with minerals at high temperature to generate new phases. These raw materials work synergistically to make the body tougher during molding, more stable in structure after firing, and higher in internal density, laying a solid foundation for the subsequent improvement of the hardness and strength of the pottery, and effectively reducing the defects of the body during the production process;

[0039] 2. In this scheme, the bubbles inside the pottery are effectively filled and the density is increased through the bubble filling solution and appropriate treatment process of the embryo. The solution composed of silica sol, methyl cellulose, ethanol and boric acid penetrates into the bubble pores by capillary action, and the silica particles are solidified and filled during air drying and firing. This not only eliminates the internal bubbles, but also enhances the integrity of the embryo, further improves the hardness, strength and deformation resistance of the pottery, and makes its physical properties more excellent.

[0040] 3. In this scheme, the surface performance of pottery is greatly improved by adopting a special glaze formula and precise glazing and firing processes; various components in the glaze, such as silica and alumina, form hard glass phase and crystal phase at high temperature, which enhances the hardness, wear resistance and oxidation resistance of the glaze surface; the thickness and method are reasonably controlled during glazing, and the temperature and atmosphere are strictly controlled during firing, so that the glaze and the body react fully to form a uniform and dense protective film on the surface of the pottery, which effectively resists external erosion and improves the oxidation resistance and aesthetics of the pottery. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0042] Figure 1 The present invention is a flow chart of the steps of a method for producing high-hardness anti-oxidation pottery. DETAILED DESCRIPTION

[0043] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various forms, so the present invention is not limited to the embodiments described below.

[0044] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0045] Embodiment 1:

[0046] Please refer to Figure 1 As shown, this embodiment introduces a high-hardness anti-oxidation pottery and a production method, including an embryo, an embryo bubble filling solution, and a glaze liquid;

[0047] 1. Embryo raw materials

[0048] 1.1. Kaolin, as the main raw material of pottery embryo, gives the embryo good plasticity and formability. During the firing process, the minerals in kaolin undergo a series of physical and chemical changes to form a stable crystal structure, providing basic strength and hardness for pottery. In addition, kaolin has fine particle size and high purity, which can ensure the uniform and fine texture of pottery and reduce the occurrence of internal defects.

[0049] 1.2. Bentonite, the main mineral is montmorillonite, which has a unique layered structure. Bentonite has strong water absorption and expansion properties, and forms a gel-like substance when it comes into contact with water. When mixed with kaolin, bentonite can enhance the bonding force between kaolin particles, making the embryo tougher and less prone to cracking during the molding process. During the firing process, bentonite fills the pores between kaolin particles, further increasing the density of the embryo, thereby increasing the hardness of the pottery.

[0050] 1.3. Water glass (sodium silicate solution), the main component is sodium silicate, the modulus n is generally between 3.0-3.3, the concentration is usually 30%-40%, sodium silicate exists in the form of ions in water, and has strong chemical activity. Water glass reacts chemically with minerals in kaolin at high temperatures to generate new aluminosilicate mineral phases. These new mineral phases can enhance the binding force between particles and make the structure of pottery more stable. In addition, water glass can also reduce the firing temperature of kaolin, so that kaolin can achieve a better sintering state at a relatively low temperature, reduce the damage of high temperature to the structure of pottery, and further improve the hardness of pottery;

[0051] 1.4. Water, as a solvent and lubricant, plays an important role in the embryo production process. It allows raw materials such as kaolin, bentonite and water glass to be fully mixed to form a uniform embryo. At the same time, water can also adjust the humidity of the embryo, making it have appropriate plasticity and facilitating molding operations;

[0052] 2. Preparation of Embryo Bodies

[0053] 2.1. Raw material preparation

[0054] Select high-quality kaolin, pass it through a 200-mesh sieve to remove impurities and larger particles to ensure the purity and uniform particle size of the kaolin; select sodium-based bentonite, also pass it through a 200-mesh sieve to ensure that its particle size meets the requirements;

[0055] Prepare a water glass solution with a modulus of 3.0-3.3 and a concentration of 30%-40%; use pure water or softened water to avoid impurities in the water that affect the quality of the pottery;

[0056] 2.2. Preparation of mixed solution

[0057] According to the mass ratio of bentonite to water of 1:5-8, the bentonite is slowly added into the water, and mechanical stirring is performed at the same time, the stirring speed is controlled at 200-300 rpm, and the stirring time is 30-40 minutes, so that the bentonite fully absorbs water and expands to form a uniform bentonite slurry;

[0058] Add 15%-25% of water glass solution to the bentonite slurry, continue stirring for 20-30 minutes, and the stirring speed can be appropriately increased to 300-400 rpm to fully mix the three to obtain a uniform and stable mixed solution;

[0059] 2.3. Blank mixing

[0060] Put the sieved kaolin into the mixing equipment, slowly add the prepared mixed liquid, stir while adding, make the mixed liquid and kaolin fully contact and mix evenly, control the humidity after mixing, make the moisture content of the blank between 20%-25%, so as to facilitate the subsequent molding operation, the stirring time is generally 30-60 minutes, to ensure that the blank is mixed evenly;

[0061] 2.4 Forming

[0062] According to the shape and size of the required pottery, choose the appropriate molding method, such as hand-pulling, mold molding, slip injection molding, etc. During the molding process, pay attention to maintaining the uniformity and integrity of the embryo to avoid defects such as bubbles and cracks;

[0063] 2.5. Embryo drying

[0064] Preliminary drying: Place the prepared embryo in a well-ventilated environment with a suitable temperature (generally 25-35°C) for natural drying, or use low-temperature drying equipment for drying. The drying process should be carried out slowly to avoid excessive temperature or wind speed that may cause the moisture on the embryo surface to evaporate too quickly and cause cracking. The degree of drying should be such that the moisture on the embryo surface is basically gone, but there is still a certain amount of moisture inside, and it is not sticky when touched by hand. Excessive drying will shrink the pores of the embryo, which is not conducive to the subsequent solution penetration. The drying time is generally 1-2 days, and the specific time depends on the thickness of the embryo and environmental conditions.

[0065] 3. Raw materials for embryo bubble filling solution

[0066] 3.1. Silica sol, a dispersion of nano-scale silica particles in water. The particle size of silica particles is usually between 10-100nm, and the solid content is generally between 20% and 40%. Silica sol has good permeability and can penetrate into the tiny bubbles and pores of the pottery body. During the air-drying and firing process, the water in the silica sol gradually evaporates, and the silica particles will aggregate and solidify to form silica gel, thereby filling the bubble space and improving the density and hardness of the pottery;

[0067] 3.2. Methyl cellulose, as a thickener and binder, can be added to the solution to adjust the viscosity of the solution, so that it can better adhere to the pore surface of the pottery body during the infiltration process, preventing the solution from being lost too quickly. At the same time, methyl cellulose helps to evenly distribute the silica particles, enhance the filling effect, and make the filling more sufficient and uniform;

[0068] 3.3. Ethanol. As a solvent, ethanol is miscible with water and has a low surface tension, which enables ethanol to improve the permeability of the solution and make it easier for the solution to enter the tiny bubbles in the pottery body. In addition, ethanol evaporates quickly during the air-drying process, which can accelerate the volatilization of water in the solution, promote the solidification of silica sol, and improve the filling efficiency.

[0069] 3.4. Boric acid. Boric acid acts as a flux during the firing process. It can reduce the sintering temperature of the pottery body and make the silica sol and the minerals in the pottery body better integrated. At the same time, boric acid can also improve the heat resistance and corrosion resistance of the pottery, and further improve the hardness and strength of the pottery.

[0070] 4. Embryo bubble filling solution treatment

[0071] 4.1. Solution preparation: according to the required amount of solution, accurately weigh a certain amount of silica sol, methyl cellulose, ethanol and boric acid. The solid content of silica sol is 30%, the amount of methyl cellulose is 1% of the mass of silica sol, the amount of ethanol is 20% of the volume of silica sol, and the amount of boric acid is 3% of the mass of silica sol.

[0072] 4.2. Slowly add the weighed methylcellulose into an appropriate amount of water, stirring while adding. The stirring speed is controlled at 100-150 rpm for 40 minutes to fully dissolve it and form a uniform methylcellulose solution;

[0073] 4.3. Mix silica sol and ethanol. Pour the weighed silica sol into a clean container, then slowly add ethanol and gently stir with a glass rod or stirrer at a speed of 150 rpm for 18 minutes to fully mix the silica sol and ethanol to form a stable mixed solution.

[0074] 4.4. Add boric acid. Add the weighed boric acid to the above mixture and continue stirring for 12 minutes to allow the boric acid to completely dissolve in the mixture. At this time, the solution may slightly release heat, which is normal.

[0075] 4.5. Add methylcellulose solution, slowly pour the dissolved methylcellulose solution into the mixed solution containing silica sol, ethanol and boric acid, stirring at a speed of 120 rpm for 25 minutes, so that all ingredients are fully mixed to form a uniform, stable and highly permeable solution;

[0076] 4.6. Filtration: Filter the prepared solution through a filter to remove possible impurities and undissolved particles to ensure the purity and uniformity of the solution. The filtered solution can be used to treat the pottery embryo;

[0077] 5. Embryo Bubble Treatment

[0078] 5.1. Soaking and Penetration

[0079] The pottery body after preliminary drying is completely immersed in the silica sol solution. The immersion time is determined according to the thickness and pore size of the body, generally 18 hours. During this period, the solution will gradually penetrate into the tiny bubbles and pores of the body under the action of capillaries. To ensure the penetration effect, the solution can be gently stirred or the body can be turned over every 6 hours so that the solution can fully contact all parts of the body.

[0080] 5.2. Take out and drain

[0081] After soaking, take the embryo out of the solution and place it on a stand to drain the excess solution naturally; the draining time should be controlled within 1-2 hours, not too long, to avoid excessive accumulation of solution on the surface of the embryo and forming an uneven coating;

[0082] 5.3. Secondary air drying

[0083] Place the drained embryo in a well-ventilated environment with appropriate temperature and humidity (temperature 25-30℃, humidity 40%-50%) for air drying. The air drying process should be carried out slowly to avoid excessive temperature or wind speed that may cause the moisture on the embryo surface to evaporate too quickly and cause cracking. During the air drying process, the moisture in the solution gradually evaporates, and substances such as silica sol will solidify in the bubbles to initially fill the bubbles. The air drying time is generally 2-3 days, and the specific time depends on the size of the embryo and environmental conditions.

[0084] 6. Glaze raw materials

[0085] 6.1. Silicon dioxide, with a purity of generally more than 98% and a particle size that can pass a 200-mesh sieve, is the main component of the glaze liquid. Silicon dioxide forms a continuous glass phase at high temperatures and fills the pores on the surface of the pottery, making the glaze smoother and denser, thereby improving the hardness and glossiness of the glaze surface;

[0086] 6.2. Alumina, with a purity of more than 99% and a particle size of more than 200 mesh. Alumina can improve the chemical stability, hardness and high temperature resistance of the glaze. At high temperatures, alumina reacts with other components to form a hard crystalline phase, which enhances the wear resistance and scratch resistance of the glaze.

[0087] 6.3 Calcium oxide, the main component of which is calcium carbonate (CaCO 3 ), purity is above 95%, needs to be ground to pass through a 200-mesh sieve. Calcium oxide, as a flux, can lower the melting point of the glaze, improve the fluidity and glossiness of the glaze, and it can also enhance the bonding force between the glaze and the body, making the glaze less likely to peel off;

[0088] 6.4. Magnesium oxide, purity above 90%, passed through 200 mesh sieve. Magnesium oxide can improve the high temperature performance of glaze, increase the flatness and glossiness of glaze surface, and it can also improve the hardness and chemical stability of glaze, making the glaze surface more resistant to acid and alkali corrosion;

[0089] 6.5. Zinc oxide, purity above 99%, particle size above 200 mesh. Zinc oxide acts as a flux to reduce the melting temperature of the glaze, improve the transparency and glossiness of the glaze, and also enhance the hardness and oxidation resistance of the glaze, forming a protective film on the glaze surface to prevent oxygen and other harmful substances from corroding the pottery.

[0090] 6.6, Borax, purity is above 95%, Borax provides boron element, reduces the melting point of glaze, increases the transparency and glossiness of glaze, it can also improve the thermal shock resistance and chemical stability of glaze, making the glaze less likely to crack at high temperature and temperature changes;

[0091] 6.7. Colorants, such as copper oxide, iron oxide, etc., select appropriate metal oxides according to the desired color, with a purity of more than 98%, and pass through a 200-mesh sieve. Colorants give different colors to pottery, and present various bright colors through chemical reactions with other ingredients in the glaze at high temperatures;

[0092] 7. Glaze preparation

[0093] 7.1. Raw material preparation

[0094] Weigh the glaze raw materials according to the following mass proportions: 50% silicon dioxide (quartz powder), 18% aluminum oxide (industrial aluminum oxide powder), 12% calcium oxide (calcite), 8% magnesium oxide (talc), 5% zinc oxide, 5% borax, and 2% colorant (added as needed); sieve the quartz powder, industrial aluminum oxide powder, calcite, talcum powder, zinc oxide, borax and other raw materials through a 200-mesh sieve to ensure uniform particle size of the raw materials;

[0095] 7.2 Ball milling

[0096] Put the weighed raw materials into a ball mill, add appropriate amount of water and grinding media (such as ceramic balls), the amount of water added is 35% of the total mass of the raw materials; the speed of the ball mill is set to 180 rpm, and the ball milling time is 18 hours, so that the raw materials are fully mixed and ground to form a uniform glaze slurry;

[0097] 7.3 Additive addition and performance adjustment

[0098] Add 0.8% of the binder (sodium carboxymethyl cellulose) by weight to the glaze slurry, stir while adding, the stirring speed is 120 rpm, the stirring time is 30 minutes, so that the binder is fully dissolved and evenly dispersed in the glaze slurry, according to the actual consistency of the glaze slurry, add water as a diluent in an appropriate amount, adjust the Baume degree of the glaze slurry to 42Be', so that the glaze slurry has suitable fluidity, which is convenient for subsequent glazing operation;

[0099] 7.4. Staleness

[0100] The glaze slurry with adjusted properties is transferred to a special aging container, sealed, and aged at room temperature for 36 hours to further cause physical and chemical changes in various components in the glaze slurry, thereby improving the stability of the glaze slurry and the glazing effect;

[0101] 8. Glazing

[0102] 8.1. Selection of glazing method: According to the shape and size of the pottery, choose the appropriate glazing method, such as dipping, spraying or brushing;

[0103] Glaze dipping: completely immerse the body in the glaze liquid, and quickly take it out so that the glaze liquid evenly covers the surface of the body. The dipping time is determined by the water absorption of the body and the concentration of the glaze liquid, generally 2-3 seconds;

[0104] Spray glaze: Use a spray gun to spray the glaze liquid evenly on the surface of the body. When spraying glaze, pay attention to controlling the pressure and distance of the spray gun to make the glaze layer thickness uniform. The spray pressure is generally 0.2-0.4MPa, and the distance between the spray gun and the body is 20-30cm;

[0105] Glaze: Use a brush to evenly apply the glaze liquid on the surface of the body. Pay attention to the direction and strength of the brush when applying the glaze to avoid brush marks.

[0106] 8.2. Glazing thickness control

[0107] The thickness of the glaze should be uniform, generally controlled between 0.1-0.3mm. A glaze layer that is too thick is prone to glaze flow and cracking during the firing process, while a glaze layer that is too thin will affect the hardness and glossiness of the glaze surface.

[0108] 9. Firing

[0109] 9.1. Warm-up phase

[0110] The glazed body is placed in the kiln and heated to 350°C at a rate of 5°C / min and kept at this temperature for 40 minutes. The purpose of this stage is to remove the residual moisture and organic matter in the body and prevent the body from cracking due to rapid evaporation of moisture at high temperature.

[0111] 9.2 Heating stage

[0112] Continue to heat up to 900℃ at a rate of 8℃ / min, so that the minerals in the embryo gradually react chemically to form a preliminary sintering structure. During the heating process, pay close attention to the temperature changes in the kiln to ensure a uniform heating rate.

[0113] 9.3 High temperature insulation stage

[0114] The temperature is raised to 1100℃ and kept for 2.5 hours. At high temperature, the glaze liquid reacts fully with the body, the silicon dioxide in the silica sol further fuses with the minerals in the body, and boric acid acts as a flux to promote the reaction, so that the filling material and the body are better combined to form a hard ceramic structure; at the same time, the various components in the glaze also react chemically to form a smooth and dense glass layer, which improves the hardness and anti-oxidation performance of the pottery;

[0115] 9.4 Cooling Phase

[0116] After firing, let the pottery in the kiln cool naturally to room temperature. The cooling time is generally 12-16 hours. During the cooling process, pay attention to controlling the cooling speed to avoid excessive thermal stress that may cause cracks in the pottery. Slow cooling helps stabilize the internal structure of the pottery, making the crystal structure more complete and further improving the hardness and strength of the pottery.

[0117] Comparative Example 1:

[0118] 1. Preparation of embryo raw materials and mixed solution

[0119] 1.1. Kaolin: Pass through a 200-mesh sieve to ensure purity and uniform particle size. As the main raw material for the embryo, it provides basic formability and strength after sintering.

[0120] 1.2. Binder: Sodium carboxymethyl cellulose is used as a binder to enhance the binding force between kaolin particles;

[0121] 1.3. Water: used as solvent and to adjust humidity, so that the raw materials are mixed evenly and have plasticity;

[0122] 2. Preparation of mixed solution: put kaolin into a stirring device, add 0.5% sodium carboxymethyl cellulose by weight of kaolin, stir while adding, and slowly add an appropriate amount of water, control the moisture content of the mixed material to 20%-25%, and stir for 30-60 minutes until it is uniform;

[0123] 3. Subsequent steps: The subsequent stages are the same as in Example 1;

[0124] Comparative Example 2:

[0125] 1.1. Embryo preparation: In the embryo preparation stage, the raw material preparation, mixed solution preparation, embryo mixing, molding and drying treatment are the same as those in Example 1, that is, high-quality kaolin and sodium bentonite are selected and sieved, bentonite, water glass and water are mixed in proportion to form a mixed solution, which is then mixed with kaolin to form an embryo, and after molding, it is preliminarily dried to a suitable degree in a well-ventilated environment at 25-35°C;

[0126] Subsequent steps: skipping the embryo bubble filling solution treatment step, directly carrying out glaze preparation, glazing and firing, glaze preparation, weighing silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, zinc oxide, borax, colorant and other raw materials according to mass proportion, ball milling and mixing, adding additives to adjust performance, and glazing after aging; glazing method and thickness control are consistent with Example 1, and temperature and time settings at each stage of the firing process are also the same as Example 1;

[0127] Comparative Example 3:

[0128] 1. Glaze preparation

[0129] 1.1. Glaze raw materials: mainly common ceramic glaze raw materials such as feldspar, quartz, clay, etc.

[0130] 1.2. Preparation process: Mix feldspar, quartz and clay in a certain proportion (such as 40% feldspar, 30% quartz and 30% clay), add appropriate amount of water, put into a ball mill and grind into a uniform glaze slurry. The ball milling time is about 10 hours. No additives are added, performance adjustment or aging steps are performed;

[0131] 1.3. Other steps: embryo preparation and embryo bubble filling solution treatment (if any) are the same as in Example 1. When glazing, glaze dipping, glaze spraying or glaze brushing methods are selected according to the shape and size of the pottery, and the thickness of the glaze layer is controlled to be 0.1-0.3 mm. The firing process is the same as in Example 1, and the operation is carried out according to the preheating, heating, high temperature insulation and cooling stages. The temperature and time settings of each stage remain unchanged;

[0132] Experimental example:

[0133] The pottery prepared according to Example 1 and the three comparative examples were subjected to strength, hardness and oxidation resistance tests;

[0134]

[0135] 1. Results analysis

[0136] 1.1. Compressive strength and flexural strength

[0137] Example 1: Since bentonite is used to enhance the bonding force between kaolin particles, water glass reacts with kaolin at high temperature to generate a new mineral phase to enhance structural stability, and the bubbles in the embryo bubble filling solution are filled with bubbles to improve density, the pottery of Example 1 has higher compressive and flexural strengths; these factors work together to make the internal structure of the pottery more compact and able to withstand greater pressure and bending force;

[0138] Comparative Example 1: Only water, kaolin and adhesive were mixed. The bonding effect of the adhesive was relatively limited and it could not undergo chemical reaction at high temperature to strengthen the structure like water glass. Moreover, there was no filling and strengthening effect of bentonite, resulting in a significantly lower strength than Example 1.

[0139] Comparative Example 2: After the embryo bubble filling solution was removed, the bubbles in the embryo were not effectively filled, and there were many pores inside, which reduced the overall strength of the pottery; despite the effects of bentonite and water glass, the presence of bubbles weakened the continuity of the structure, making the strength inferior to that of Example 1;

[0140] Comparative Example 3: Ordinary glaze was used. The effect of the glaze on improving the strength of the pottery was relatively weak and could not make up for the structural deficiencies of the embryo itself. Although its strength was slightly higher than that of Comparative Example 2, it was still lower than that of Example 1, indicating that the performance of the glaze had a certain influence on the strength of the pottery, but it was not a decisive factor.

[0141] 1.2. Hardness

[0142] Example 1: Silica sol fills bubbles to form silica gel, and various components in the glaze liquid form hard glass phase and crystal phase at high temperature, which together increase the hardness of the pottery and make its Mohs hardness reach 6-7;

[0143] Comparative Example 1: Lacking the chemical reaction enhancement of water glass and the filling and strengthening of the embryo bubble filling solution, the hardness is relatively low, only 4-5;

[0144] Comparative Example 2: There is no embryo bubble filling solution, the embryo density is insufficient, the hardness is affected, and the Mohs hardness is 5-6;

[0145] Comparative Example 3: The effect of the common glaze in improving the hardness is not as good as that of the glaze of Example 1, so the hardness is similar to that of Comparative Example 2, which is 5-6;

[0146] 1.3 Antioxidant properties

[0147] Example 1: The zinc oxide, borax and other components in the glaze and the boric acid in the filling solution form a dense protective film on the surface of the pottery, which effectively prevents the erosion of oxygen and other harmful substances. Therefore, there is no obvious change on the surface after being placed in a specific oxidizing environment for 100 hours;

[0148] Comparative Example 1: Due to the low strength and density, the internal structure is relatively loose, oxygen can enter more easily, resulting in slight oxidation discoloration and a small amount of rust on the surface;

[0149] Comparative Example 2: The bubbles in the embryo were not filled, and there were many pores, which provided a channel for oxygen, resulting in poor oxidation resistance. The surface had obvious oxidation discoloration, many rust spots and slight corrosion marks;

[0150] Comparative Example 3: The anti-oxidation performance of ordinary glaze is limited. Although it can protect the surface of pottery to a certain extent, it cannot achieve the effect of Example 1, so the surface has a certain degree of oxidation discoloration, rust spots and slight corrosion.

[0151] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A high-hardness anti-oxidation pottery, characterized in that: The pottery comprises an embryo, a solution for filling bubbles in the embryo, and a glaze liquid; The embryo body is made by mixing kaolin, bentonite, water glass and water; The embryo bubble filling solution comprises silica sol, methyl cellulose, ethanol and boric acid; The method for preparing the embryo bubble filling solution is as follows: Step 1, the solid content of the silica sol is selected to be 30%, the amount of methyl cellulose is 1% of the mass of the silica sol, the amount of ethanol is 20% of the volume of the silica sol, and the amount of boric acid is 3% of the mass of the silica sol; Step 2: Slowly add the weighed methyl cellulose into an appropriate amount of water and stir to dissolve; Step 3, mixing silica sol and ethanol; Step 4, adding the weighed boric acid into the mixed solution of silica sol and ethanol; Step 5, mixing the solution of step 2 and the solution of step 4; The glaze liquid is made of silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, zinc oxide, borax and a colorant.

2. The high-hardness anti-oxidation pottery according to claim 1, characterized in that: The embryoid bodies were prepared as follows: Step 1: kaolin, pass through a 200-mesh sieve to remove impurities and larger particles; water glass solution with a modulus of 3.0-3.3 and a concentration of 30%-40%; appropriate amount of water; Step 2, the mass ratio of bentonite to water is 1:5-8, the stirring speed is controlled at 200-300 rpm, and the stirring time is 30-40 minutes to form a uniform bentonite slurry; Step 3, adding 15%-25% of the water glass solution by mass of the bentonite to the bentonite slurry, stirring for 20-30 minutes at a stirring speed of 300-400 rpm to obtain a mixed solution; Step 4, mixing kaolin and the mixed solution; Step 5: Make the embryo according to the shape and size of the required pottery; Step 6: Drying the embryo.

3. The high-hardness anti-oxidation pottery according to claim 1, characterized in that: The glaze liquid is prepared as follows: Step 1, 50% silicon dioxide, 18% aluminum oxide, 12% calcium oxide, 8% magnesium oxide, 5% zinc oxide, 5% borax, and 2% colorant; sieve quartz powder, industrial aluminum oxide powder, calcite, talcum powder, zinc oxide, borax and other raw materials through a 200-mesh sieve to ensure uniform particle size of the raw materials; Step 2: Put the weighed raw materials into a ball mill, add appropriate amount of water and grinding medium, mix and grind thoroughly to form a uniform glaze slurry; Step 3, adding a binder accounting for 0.8% of the mass of the glaze slurry to the glaze slurry, and stirring at 120 rpm for 30 minutes; Step 4: Transfer the glaze slurry to an aging container, seal it, and age it at room temperature for 36 hours.

4. A high-hardness anti-oxidation pottery as claimed in any one of claims 1 to 3, characterized in that: The production method of the high-hardness anti-oxidation pottery specifically comprises the following steps: Step 1: treating the embryo bubbles, completely immersing the preliminarily dried ceramic embryo in an embryo bubble filling solution, the immersion time being determined according to the thickness and pore size of the embryo; Step 2: After soaking, take the embryo out of the solution and place it on a rack to naturally drain the excess solution; Step 3, air-drying the drained embryos for a second time; Step 4: Glazing: According to the shape and size of the pottery, choose a suitable glazing method, and control the glazing thickness between 0.1-0.3mm; Step 5, firing, placing the glazed body into the kiln, heating it to 350°C at a rate of 5°C / min, keeping it warm for 40 minutes, then heating it to 900°C at a rate of 8°C / min, and then raising the temperature to 1100°C, keeping it warm for 2.5 hours; Step 6: Cooling: Allow the pottery in the kiln to cool naturally to room temperature.

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