Preparation method of ice species jade porcelain with high thermal shock resistance

Abstract

This invention discloses a high thermal shock resistant icy jade porcelain and its preparation method. The body includes: kaolin, potassium feldspar, fused silica, bentonite, and a small amount of additives; the glaze includes: kaolin, limestone, potassium feldspar, quartz, talc, zinc oxide, barium carbonate, strontium carbonate, and zirconium silicate. The preparation method includes: (1) Preparation of body clay and glaze: Weigh and mix the materials according to the icy jade porcelain body formula and glaze formula, crush, mix, and wet ball mill the raw materials to obtain icy jade porcelain body slurry and glaze slurry; (2) Bisque firing: Use the body slurry obtained in step 1 to make a ceramic body, dry it and put it into a kiln for bisque firing to obtain a ceramic body; (3) Glaze firing: Apply glaze to the surface of the obtained ceramic body, dry it and put it into a kiln for high-temperature firing according to the set firing process to obtain the finished product. The final product of this invention is icy jade porcelain with a smooth and delicate surface, dense and transparent body, and high transparency, which has both excellent thermal shock resistance and crack resistance and clear icy texture.

Description

Technical Field

[0001] This invention relates to the field of daily-use ceramics technology, and in particular to a method for preparing ice-type jade porcelain with high thermal shock resistance. Background Technology

[0002] Dehua County in Quanzhou City, Fujian Province, is an important ceramic production area in China, with a long history of ceramic firing techniques that have been passed down to this day. High-end white porcelain, characterized by its high quartz content, holds an important position among local high-end ceramic products due to its delicate texture, good translucency, and pure white color.

[0003] In pursuit of superior quality, the industry has optimized raw material formulas and firing processes to reduce porosity in the body and improve the density and translucency of the porcelain. This has led to the development of niche products with specific textures, such as icy jade porcelain (the term "icy" in this invention refers to porcelain with a high degree of transparency and a lustrous texture similar to icy jadeite, hereinafter the same). Icy jade porcelain products are characterized by their clear, white, and translucent texture, exhibiting a unique high-end aesthetic that has made them highly sought after in the market.

[0004] However, these icy jade porcelain products still face challenges in long-term use. The inherent brittleness of the high-quartz body, as well as the significant volumetric stress generated by the quartz crystal transformation during firing and cooling, are intrinsic factors affecting the product's thermal shock resistance and reliability.

[0005] At the material formulation level, there is still a lack of targeted solutions on how to buffer stress and enhance thermal shock resistance through systematic component design.

[0006] At the process level, there is a lack of coordinated optimization between sintering temperature and cooling temperature regime, resulting in insufficient control over the microstructure of the ceramic body and difficulty in effectively suppressing the initiation and propagation of microcracks.

[0007] This makes some products susceptible to cracking or breakage when subjected to external impacts or rapid temperature changes, thus limiting their application range.

[0008] Therefore, in order to solve the technical problem of existing icy jade porcelain products being prone to cracking and breakage, while maintaining high light transmittance and the clear and lustrous texture of icy jade, it is necessary to provide a comprehensive solution from materials to processes to improve the thermal shock resistance, mechanical properties and physicochemical properties of icy jade porcelain, and ensure its long-term reliability. This is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0009] In view of this, the present invention provides a method for preparing ice jade porcelain with high thermal shock resistance, which significantly improves the thermal shock resistance and mechanical toughness of the product.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] A type of icy jade porcelain with high thermal shock resistance, wherein the jade artifact is composed of raw body material and glaze material; wherein, by mass parts,

[0012] The raw materials for the green body include: 15-20 parts of kaolin, 15-30 parts of potassium feldspar, 60-75 parts of fused silica, 3-5 parts of bentonite, 0.3-0.5 parts of carboxymethyl cellulose, and 0.6-1 parts of yttrium oxide;

[0013] The glaze raw materials include: 15-20 parts kaolin, 10-15 parts limestone, 35-45 parts potassium feldspar, 35-45 parts quartz, 2-5 parts talc, 2-5 parts zinc oxide, 3-8 parts barium carbonate, 2-5 parts strontium carbonate, and 3-8 parts zirconium silicate.

[0014] Preferably, the chemical composition of the green body, by mass percentage, ranges as follows: SiO2 80.00-85.00%, Al2O3 9.00-13.00%, Fe2O3 0.01-0.04%, TiO2 0.01-0.04%, CaO 0.10-0.40%, MgO 0.80-1.40%, K2O 1.60-3.20%, Na2O 0.50-1.50%, Y2O3 0.30-0.60%, and loss on ignition (L) 2.00-6.00%.

[0015] The chemical composition of the glaze, by mass percentage, ranges as follows: SiO2 66.00-70.00%, Al2O3 9.00-13.00%, Fe2O3 0.01-0.10%, TiO2 0.01-0.05%, CaO 4.00-8.00%, MgO 2.00-5.00%, K2O 2.40-4.80%, Na2O 0.50-1.50%, and loss on ignition (L) 4.00-8.00%.

[0016] A method for preparing icy jade porcelain with high thermal shock resistance includes the following steps:

[0017] (1) Preparation of body clay and glaze: Weigh and mix the raw materials according to the above-mentioned ice jade porcelain body formula and glaze formula, crush, mix and wet ball mill the raw materials respectively to obtain ice jade porcelain body slurry and glaze slurry;

[0018] (2) Biscuit firing: The slurry obtained in step 1 is used to make ceramic blanks, which are dried and then placed in a kiln for biscuit firing to obtain ceramic blanks;

[0019] (3) Glazing: After glazing and drying the ceramic blank obtained in step (2), it is placed in a kiln and fired at high temperature according to the set firing process to obtain the finished product.

[0020] Preferably, in step (1), the wet ball milling parameters meet the following requirements:

[0021] 1) Ball milling of billet: The ball milling time is 12-24h, the grinding medium is water, and the mass ratio of material to ball to water is billet:ball:water = 0.8-1:1.2-1.5:1. After ball milling, the D50 particle size range of the billet is 4.0~6.0µm;

[0022] 2) Ball milling of glaze: The ball milling time is 20-24h, the grinding medium is water, and the mass ratio of material to ball to water is glaze:ball:water = 0.8-1:1.2-1.5:2. After ball milling, the D50 particle size range of the glaze is 3.2~5.4µm.

[0023] Preferably, in step (1), the molding parameters meet the following requirements:

[0024] 1) The molding method is any one of roll forming, plastic compression molding, or slip casting;

[0025] 2) During slurry casting, the mass of water accounts for 35-45% of the total mass of water and dry material of the billet; during roll forming, the mass of water accounts for 20-30% of the total mass of water and dry material of the billet.

[0026] 3) When preparing the glaze slurry, the mass of water accounts for 50-75% of the total mass of water and dry glaze material.

[0027] Preferably, in step (2), the bisque firing parameters meet the following requirements:

[0028] The drying time after the clay is formed is 18-24 hours, the bisque firing temperature is 800-1000℃, the bisque firing holding time is 3-4 hours, and the bisque firing equipment adopts a resistance wire heating electric kiln.

[0029] Preferably, in step (3), the glazing and drying parameters meet the following requirements: the glazing method is either spray glazing or dip glazing.

[0030] Preferably, in step (3), the drying time after glazing is 12-18 hours, the glazing firing temperature is controlled at 1340-1360℃, and the glazing firing equipment is a resistance wire heating electric kiln.

[0031] Preferably, in step (3), the firing temperature control process meets the following requirements:

[0032] 1) Low-temperature pre-firing stage: Heat to 300±5℃ and hold for 30-60 minutes;

[0033] 2) Decomposition and oxidation stage: Heat to 1100±5℃ and hold for 4.0-5.0 hours;

[0034] 3) High-temperature firing stage: Raise the temperature to 1350±5℃ and hold for 3.5-4.5 hours;

[0035] 4) Firing and cooling stage: After firing, the temperature is lowered to 1000℃±5℃ and kept at that temperature for 40-60 minutes. Finally, the finished product is taken out after the kiln has cooled naturally to below 50℃.

[0036] The present invention achieves the following technical effects compared to the prior art:

[0037] (1) This invention improves the thermal shock resistance qualification rate of high thermal shock resistance ice jade porcelain products to over 95% through the synergistic effect of composite toughening phase and optimized firing process;

[0038] (2) This invention improves the bonding degree between the body and glaze by controlling the particle size and chemical composition of the body and glaze, which significantly enhances the mechanical strength, thermal shock resistance and thermal stability of the porcelain.

[0039] (3) The present invention promotes the densification of the green body through a reasonable firing process, which can reduce energy consumption by 10-15% while improving the light transmittance and gloss of the finished product.

[0040] (4) The present invention adopts a multi-stage heating and cooling process, which improves the crystallinity and strengthens the ceramic skeleton by high temperature heat preservation, thereby further enhancing the thermal shock resistance.

[0041] The entire process parameters of this invention are controllable, which can significantly improve product consistency and yield. The final product is a smooth and delicate glaze, a dense and transparent body, and high transparency. It also has excellent thermal shock resistance and crack resistance, as well as a clear and smooth icy texture. Attached Figure Description

[0042] Figure 1 These are XRD analysis diagrams of Embodiments 1 and 2 of the present invention;

[0043] Figure 2 This is the XRD analysis diagram of Comparative Example 1 of the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] This invention discloses a type of icy jade porcelain with high thermal shock resistance. The jade artifact is composed of raw materials for the body and glaze; wherein, by mass fraction,

[0046] The raw materials for the green body include: 15-20 parts kaolin, 15-30 parts potassium feldspar, 60-75 parts fused silica, 3-5 parts bentonite, 0.3-0.5 parts carboxymethyl cellulose, and 0.6-1 parts yttrium oxide;

[0047] The glaze raw materials include: 15-20 parts kaolin, 10-15 parts limestone, 35-45 parts potassium feldspar, 35-45 parts quartz, 2-5 parts talc, 2-5 parts zinc oxide, 3-8 parts barium carbonate, 2-5 parts strontium carbonate, and 3-8 parts zirconium silicate.

[0048] The chemical composition range of the green body is as follows: SiO2 80.00-85.00%, Al2O3 9.00-13.00%, Fe2O3 0.01-0.04%, TiO2 0.01-0.04%, CaO 0.10-0.40%, MgO 0.80-1.40%, K2O 1.60-3.20%, Na2O 0.50-1.50%, Y2O3 0.30-0.60%, and loss on ignition (IL) 2.00-6.00%.

[0049] The chemical composition of the glaze, by mass percentage, ranges as follows: SiO2 66.00-70.00%, Al2O3 9.00-13.00%, Fe2O3 0.01-0.10%, TiO2 0.01-0.05%, CaO 4.00-8.00%, MgO 2.00-5.00%, K2O 2.40-4.80%, Na2O 0.50-1.50%, and loss on ignition (L) 4.00-8.00%.

[0050] This invention also discloses a method for preparing ice-type jade porcelain with high thermal shock resistance, comprising the following steps:

[0051] (1) Preparation of body clay and glaze: Weigh and mix the raw materials according to the above-mentioned ice jade porcelain body formula and glaze formula, crush, mix and wet ball mill the raw materials respectively to obtain ice jade porcelain body slurry and glaze slurry;

[0052] (2) Biscuit firing: The slurry obtained in step 1 is used to make ceramic blanks, which are dried and then placed in a kiln for biscuit firing to obtain ceramic blanks;

[0053] (3) Glazing: After glazing and drying the ceramic blank obtained in step (2), it is placed in a kiln and fired at high temperature according to the set firing process to obtain the finished product.

[0054] In step (1), the wet ball milling parameters must meet the following requirements:

[0055] 1) Ball milling of billet: The ball milling time is 12-24h, the grinding medium is water, and the mass ratio of material to ball to water is billet:ball:water = 0.8-1:1.2-1.5:1. After ball milling, the D50 particle size range of the billet is 4.0~6.0µm;

[0056] 2) Ball milling of glaze: The ball milling time is 20-24h, the grinding medium is water, and the mass ratio of material to ball to water is glaze:ball:water = 0.8-1:1.2-1.5:2. After ball milling, the D50 particle size range of the glaze is 3.2~5.4µm.

[0057] In step (1), the molding parameters must meet the following requirements:

[0058] 1) The molding method is any one of roll forming, plastic compression molding, or slip casting;

[0059] 2) During slurry casting, the mass of water accounts for 35-45% of the total mass of water and dry material of the billet; during roll forming, the mass of water accounts for 20-30% of the total mass of water and dry material of the billet.

[0060] 3) When preparing the glaze slurry, the mass of water accounts for 50-75% of the total mass of water and dry glaze material.

[0061] In step (2), the bisque firing parameters must meet the following requirements:

[0062] The drying time after the clay is formed is 18-24 hours, the bisque firing temperature is 800-1000℃, the bisque firing holding time is 3-4 hours, and the bisque firing equipment adopts a resistance wire heating electric kiln.

[0063] In step (3), the glazing and drying parameters must meet the following requirements: the glazing method is either spray glazing or dip glazing.

[0064] In step (3), the drying time after glazing is 12-18 hours, the glazing firing temperature is controlled at 1340-1360℃, and the glazing firing equipment is a resistance wire heating electric kiln.

[0065] In step (3), the firing temperature control process must meet the following requirements:

[0066] 1) Low-temperature pre-firing stage: Heat to 300±5℃ and hold for 30-60 minutes;

[0067] 2) Decomposition and oxidation stage: Heat to 1100±5℃ and hold for 4.0-5.0 hours;

[0068] 3) High-temperature firing stage: Raise the temperature to 1350±5℃ and hold for 3.5-4.5 hours;

[0069] 4) Firing and cooling stage: After firing, the temperature is lowered to 1000℃±5℃ and kept at that temperature for 40-60 minutes. Finally, the finished product is taken out after the kiln has cooled naturally to below 50℃.

[0070] Example 1:

[0071] The preparation method of this embodiment of high thermal shock resistant icy jade porcelain consists of the following steps:

[0072] (1) Preparation of body clay and glaze: Weigh and mix the raw materials according to the body clay formula and glaze formula of ice jade porcelain. The raw materials are crushed, mixed and wet ball milled to obtain ice jade porcelain body slurry and glaze slurry.

[0073] (2) Biscuit firing: The slurry obtained in step (1) is used to make ceramic blanks, which are then placed in a kiln and biscuit fired to obtain ceramic blanks.

[0074] (3) Glazing: After the ceramic blank from step (2) is glazed and dried, it is placed in a kiln and fired at high temperature using the corresponding firing process.

[0075] in:

[0076] The green body in step (1) includes the following raw materials by mass: 15 parts kaolin, 20 parts potassium feldspar, 70 parts fused silica, 5 parts bentonite, 0.3 parts carboxymethyl cellulose, and 0.6 parts yttrium oxide;

[0077] Furthermore, the chemical composition range of the green body, expressed as a percentage by mass, is as follows:

[0078] The composition is as follows: SiO2 81.15%, Al2O3 10.12%, Fe2O3 0.02%, TiO2 0.02%, CaO 0.24%, MgO 1.06%, K2O 2.60%, Na2O 0.93%, Y2O3 0.54%, and loss on ignition (IL) 3.13%.

[0079] The glaze in step (1) includes the following raw materials by mass: 15 parts kaolin, 10 parts limestone, 40 parts potassium feldspar, 40 parts quartz, 3 parts talc, 3 parts zinc oxide, 5 parts barium carbonate, 3 parts strontium carbonate, and 5 parts zirconium silicate.

[0080] Furthermore, the chemical composition range of the glaze, expressed as a percentage by mass, is as follows:

[0081] The composition of SiO2 is 68.66%, Al2O3 is 11.43%, Fe2O3 is 0.07%, TiO2 is 0.04%, CaO is 4.08%, MgO is 2.45%, K2O is 3.92%, Na2O is 0.67%, and the loss on ignition (IL) is 6.05%.

[0082] In step (1), the ball milling time for the billet is 12 hours, the grinding medium is water, and the ratio of billet:ball:water is 1:1.5:1. The resulting slurry D after ball milling... 50 The particle size range is 5.48 ± 1.0 µm.

[0083] In step (1), the glaze ball milling time is 24 hours, the grinding medium is water, and the ratio of glaze:ball:water is 1:1.5:2. The resulting clay material D after ball milling... 50 The particle size range is 4.22 ± 1.0 µm.

[0084] In step (1), the clay is formed by rolling.

[0085] In step (1), the mass of water used in the roll forming process accounts for 25% of the total mass of water and dry blank material.

[0086] In step (1), the water in the glaze slurry accounts for 70% of the total mass of water and dry material.

[0087] In step (2), the drying time of the clay after molding is 18 h, the bisque firing temperature is 900℃, the bisque firing time is 4 h, and the bisque firing equipment adopts a resistance wire heating electric kiln.

[0088] In step (3), the glazing method for the unglazed body is spray glazing.

[0089] In step (3), the drying temperature after glazing the unglazed body is 30℃, the drying time is 12 h, the glazing firing temperature is 1350℃, and the glazing firing equipment is a resistance wire heating electric kiln.

[0090] In step (3), the firing process is controlled as follows:

[0091] Low-temperature pre-firing stage: Heat to 300±5℃ and pre-firing for 45 minutes;

[0092] Decomposition and oxidation stage: Heat to 1100±5℃ and calcine for 4.0 h;

[0093] High-temperature firing stage: the temperature is raised to 1350±5℃, and the firing time is 4.0 h;

[0094] Firing and cooling stage: After firing, the temperature is lowered to 1000℃±5℃ and held for 40 minutes. Finally, the finished product can be taken out after the kiln cools down naturally to below 50℃.

[0095] The method for preparing high thermal shock resistant icy jade porcelain in this embodiment improves thermal shock resistance and thermal stability through the synergistic effect of composite toughening phase and optimized firing process; promotes body densification through reasonable firing regime to improve light transmittance and gloss; and reduces energy consumption and improves yield by multi-stage temperature control and high-temperature heat preservation microcrystallization, resulting in a finished product with a smooth glaze and a dense and transparent body.

[0096] Example 2:

[0097] The preparation method of high thermal shock resistant icy jade porcelain in Example 2 consists of the following steps:

[0098] (1) Preparation of body clay and glaze: Weigh and mix the raw materials according to the body clay formula and glaze formula of ice jade porcelain. The raw materials are crushed, mixed and wet ball milled to obtain ice jade porcelain body slurry and glaze slurry.

[0099] (2) Biscuit firing: The slurry obtained in step (1) is used to make ceramic blanks, which are then placed in a kiln and biscuit fired to obtain ceramic blanks.

[0100] (3) Glazing: After the ceramic blank from step (2) is glazed and dried, it is placed in a kiln and fired at high temperature using the corresponding firing process.

[0101] in:

[0102] The green body described in step (1) includes the following raw materials in parts by mass: 15 parts kaolin, 25 parts potassium feldspar, 75 parts fused silica, 5 parts bentonite, 0.3 parts carboxymethyl cellulose, and 0.6 parts yttrium oxide;

[0103] Furthermore, the chemical composition range of the green body, expressed as a percentage by mass, is as follows:

[0104] The composition of SiO2 is 82.12%, Al2O3 is 9.22%, Fe2O3 is 0.01%, TiO2 is 0.03%, CaO is 0.18%, MgO is 1.12%, K2O is 3.20%, Na2O is 0.67%, Y2O3 is 0.50%, and the loss on ignition (IL) is 2.65%.

[0105] In step (1), the glaze includes the following raw materials by mass: 15 parts kaolin, 15 parts limestone, 45 parts potassium feldspar, 45 parts quartz, 3 parts talc, 3 parts zinc oxide, 5 parts barium carbonate, 3 parts strontium carbonate, and 5 parts zirconium silicate.

[0106] Furthermore, the chemical composition of the glaze, by mass percentage, ranges as follows: SiO2 69.34%, Al2O3 10.98%, Fe2O3 0.05%, TiO2 0.05%, CaO 6.21%, MgO 3.45%, K2O 4.51%, Na2O 0.70%, and loss on ignition (IL) 4.17%.

[0107] In step (1), the ball milling time for the billet is 12 hours, the grinding medium is water, and the ratio of billet:ball:water is 1:1.5:1. The resulting slurry D after ball milling... 50 The particle size range is 4.92±1.0 µm.

[0108] In step (1), the glaze ball milling time is 24 hours, the grinding medium is water, and the ratio of glaze:ball:water is 1:1.5:2. The resulting clay material D after ball milling... 50 The particle size range is 4.01 ± 1.0 µm.

[0109] In step (1), the clay is formed by rolling.

[0110] In step (1), the mass of water used in the roll forming process accounts for 25% of the total mass of water and dry blank material.

[0111] In step (1), the water in the glaze slurry accounts for 70% of the total mass of water and dry material.

[0112] In step (2), the drying temperature of the clay after molding is 30℃, the drying time is 18 h, the bisque firing temperature is 900℃, the bisque firing time is 4 h, and the bisque firing equipment adopts a resistance wire heating electric kiln.

[0113] In step (3), the glazing method for the unglazed body is spray glazing.

[0114] In step (3), the drying temperature after glazing the unglazed body is 30℃, the drying time is 12 h, the glazing firing temperature is 1350℃, and the glazing firing equipment is a resistance wire heating electric kiln.

[0115] In step (3), the firing process is controlled as follows:

[0116] Low-temperature pre-firing stage: Heat to 300±5℃ and pre-firing for 60 min;

[0117] Decomposition and oxidation stage: Heat to 1100±5℃ and calcine for 5.0 h;

[0118] High-temperature firing stage: the temperature is raised to 1350±5℃, and the firing time is 4.5 h;

[0119] Firing and cooling stage: After firing, the temperature is lowered to 1100℃±5℃ and held for 60 minutes. Finally, the finished product can be taken out after the kiln cools down naturally to below 50℃.

[0120] This embodiment 2 describes a method for preparing high thermal shock resistant icy jade porcelain. Through the synergistic effect of composite toughening phase and optimized firing process, the thermal shock resistant toughness and thermal stability are improved. A reasonable firing regime promotes the densification of the body and improves the light transmittance and gloss. Multi-stage temperature control and high-temperature heat preservation microcrystallization reduce energy consumption and improve yield. The finished product has a smooth glaze and a dense and transparent body.

[0121] Comparative Example 1:

[0122] The preparation method of this comparative example 1, icy jade porcelain, consists of the following steps:

[0123] (1) Preparation of body clay and glaze: Weigh and mix the raw materials according to the body clay formula and glaze formula of ice jade porcelain. The raw materials are crushed, mixed and wet ball milled to obtain ice jade porcelain body slurry and glaze slurry.

[0124] (2) Biscuit firing: The slurry obtained in step (1) is used to make ceramic blanks, which are then placed in a kiln and biscuit fired to obtain ceramic blanks.

[0125] (3) Glazing: After the ceramic blank from step (2) is glazed and dried, it is placed in a kiln and fired at high temperature using the corresponding firing process.

[0126] in:

[0127] In step (1), the green body includes the following raw materials by mass: 15 parts kaolin, 25 parts potassium feldspar, 70 parts quartz, and 5 parts bentonite.

[0128] Furthermore, the chemical composition range of the green body, expressed as a percentage by mass, is as follows:

[0129] The composition of SiO2 is 81.02%, Al2O3 is 10.90%, Fe2O3 is 0.02%, TiO2 is 0.02%, CaO is 0.32%, MgO is 0.85%, K2O is 3.80%, Na2O is 1.23%, and the loss on ignition (IL) is 1.70%.

[0130] In step (3), the firing process is controlled as follows:

[0131] Low-temperature pre-firing stage: Heat to 300±5℃ and pre-firing for 45 minutes;

[0132] Decomposition and oxidation stage: Heat to 1100±5℃ and calcine for 4.0 h;

[0133] High-temperature firing stage: the temperature is raised to 1300±5℃, and the firing time is 4.0 h;

[0134] Firing and cooling stage: After firing, the kiln is allowed to cool naturally to below 50°C before the finished product can be removed.

[0135] Except for the specific operations of steps (1) and (3) in this comparative example, the other undescribed specific steps are the same as those in Example 1.

[0136] Test Analysis:

[0137] X-ray diffraction (XRD) analysis was performed on the ice-type jade porcelain prepared in Examples 1, 2, and 1. The results are as follows: Figure 1 , Figure 2 As shown;

[0138] The performance of the icy jade porcelain prepared in Example 1, Example 2, and Comparative Example 1 was tested, and the results are shown in Table 1:

[0139] Table 1: Performance Test Results

[0140] The XRD patterns show that the diffraction peaks of Examples 1 and 2 are high in intensity and sharp in shape, indicating that the crystal phases are well developed and evenly distributed. The diffraction peaks of Comparative Example 1 are low in intensity, reflecting that its crystallinity and structural compactness are insufficient.

[0141] By comparing the crystal phases in the two images, it can be seen that in Examples 1 and 2, the XRD patterns show that the main crystal phases are hexagonal quartz and mullite. These two crystal phases can serve as a ceramic glass framework, improving the mechanical strength and thermal shock resistance of the ceramic body. Meanwhile, no obvious impurity phases were detected, indicating that the fused quartz did not undergo an unfavorable crystal transformation during sintering, reducing volumetric stress and thus improving its thermal shock resistance.

[0142] In Comparative Example 1, the crystal phase was singular, and the XRD pattern showed that the quartz phase of the tetragonal crystal system was dominant. Its body did not form an effective toughening structure, and its thermal shock resistance was worse than that of the Example. In addition, the Example promoted the formation and development of the mullite phase through reasonable body composition design and optimized firing regime, while inhibiting the formation of unfavorable crystal phases, thereby improving the density, light transmittance and thermal shock resistance of the porcelain body.

[0143] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A type of ice-type jade porcelain with high thermal shock resistance, characterized in that, The jade artifact is composed of raw material for the blank and raw material for the glaze; wherein, by weight, The raw materials for the green body include: 15-20 parts of kaolin, 15-30 parts of potassium feldspar, 60-75 parts of fused silica, 3-5 parts of bentonite, 0.3-0.5 parts of carboxymethyl cellulose, and 0.6-1 parts of yttrium oxide; The glaze raw materials include: 15-20 parts kaolin, 10-15 parts limestone, 35-45 parts potassium feldspar, 35-45 parts quartz, 2-5 parts talc, 2-5 parts zinc oxide, 3-8 parts barium carbonate, 2-5 parts strontium carbonate, and 3-8 parts zirconium silicate.

2. The ice-type jade porcelain with high thermal shock resistance according to claim 1, characterized in that, The chemical composition of the green body, by mass percentage, ranges as follows: SiO2 80.00-85.00%, Al2O3 9.00-13.00%, Fe2O3 0.01-0.04%, TiO2 0.01-0.04%, CaO 0.10-0.40%, MgO 0.80-1.40%, K2O 1.60-3.20%, Na2O 0.50-1.50%, Y2O3 0.30-0.60%, and loss on ignition (L) 2.00-6.00%. The chemical composition of the glaze, by mass percentage, ranges as follows: SiO2 66.00-70.00%, Al2O3 9.00-13.00%, Fe2O3 0.01-0.10%, TiO2 0.01-0.05%, CaO 4.00-8.00%, MgO 2.00-5.00%, K2O 2.40-4.80%, Na2O 0.50-1.50%, and loss on ignition (L) 4.00-8.00%.

3. A method for preparing ice-type jade porcelain with high thermal shock resistance, characterized in that, Includes the following steps: (1) Preparation of body clay and glaze: Weigh and mix the raw materials according to the above-mentioned ice jade porcelain body formula and glaze formula, crush, mix and wet ball mill the raw materials respectively to obtain ice jade porcelain body slurry and glaze slurry; (2) Biscuit firing: The slurry obtained in step 1 is used to make ceramic blanks, which are dried and then placed in a kiln for biscuit firing to obtain ceramic blanks; (3) Glazing: After glazing and drying the ceramic blank obtained in step (2), it is placed in a kiln and fired at high temperature according to the set firing process to obtain the finished product.

4. The method for preparing a type of jade porcelain with high thermal shock resistance according to claim 3, characterized in that, In step (1), the wet ball milling parameters must meet the following requirements: 1) Ball milling of billet: The ball milling time is 12-24h, the grinding medium is water, and the mass ratio of material to ball to water is billet:ball:water = 0.8-1:1.2-1.5:

1. After ball milling, the D50 particle size range of the billet is 4.0~6.0µm; 2) Ball milling of glaze: The ball milling time is 20-24h, the grinding medium is water, and the mass ratio of material to ball to water is glaze:ball:water = 0.8-1:1.2-1.5:

2. After ball milling, the D50 particle size range of the glaze is 3.2~5.4µm.

5. The method for preparing a type of jade porcelain with high thermal shock resistance according to claim 3, characterized in that, In step (1), the molding parameters must meet the following requirements: 1) The molding method is any one of roll forming, plastic compression molding, or slip casting; 2) During slurry casting, the mass of water accounts for 35-45% of the total mass of water and dry material of the billet; during roll forming, the mass of water accounts for 20-30% of the total mass of water and dry material of the billet. 3) When preparing the glaze slurry, the mass of water accounts for 50-75% of the total mass of water and dry glaze material.

6. The method for preparing a type of jade porcelain with high thermal shock resistance according to claim 3, characterized in that, In step (2), the bisque firing parameters must meet the following requirements: The drying time after the clay is formed is 18-24 hours, the bisque firing temperature is 800-1000℃, the bisque firing holding time is 3-4 hours, and the bisque firing equipment adopts a resistance wire heating electric kiln.

7. The method for preparing a type of jade porcelain with high thermal shock resistance according to claim 3, characterized in that, In step (3), the glazing and drying parameters must meet the following requirements: the glazing method is either spray glazing or dip glazing.

8. The method for preparing a type of jade porcelain with high thermal shock resistance according to claim 3, characterized in that, In step (3), the drying time after glazing is 12-18 hours, the glazing firing temperature is controlled at 1340-1360℃, and the glazing firing equipment is a resistance wire heating electric kiln.

9. The method for preparing a type of jade porcelain with high thermal shock resistance according to claim 3, characterized in that, In step (3), the firing temperature control process meets the following requirements: 1) Low-temperature pre-firing stage: Heat to 300±5℃ and hold for 30-60 minutes; 2) Decomposition and oxidation stage: Heat to 1100±5℃ and hold for 4.0-5.0 hours; 3) High-temperature firing stage: Raise the temperature to 1350±5℃ and hold for 3.5-4.5 hours; 4) Firing and cooling stage: After firing, the temperature is lowered to 1000℃±5℃ and kept at that temperature for 40-60 minutes. Finally, the finished product is taken out after the kiln has cooled naturally to below 50℃.

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