Jade porcelain thin high gloss high transparency high whiteness glaze and preparation method thereof

Abstract

The present application relates to the technical field of glaze, and discloses a jade porcelain thin-body high-gloss high-transparency high-whiteness glaze, which comprises the following raw materials in parts by weight: feldspar 45-55%, quartz 15-25%, modified burned talc 5-15%, calcite 5-15%, zinc oxide 4-8%, Suzhou soil 5-10%, modified hydroxyapatite 3-10%, and barium carbonate 5-15%. According to process control and firing temperature and atmosphere requirements, the present application can be used to produce jade porcelain products with high transparency, high whiteness and high gloss. The present application is suitable for high-whiteness bodies and general bodies, and the gloss of the glaze is very high. In the preparation of the glaze, modified burned talc and modified hydroxyapatite are used in a special process, and the two are used in coordination, so that the transparency, gloss and whiteness of the product can be improved in coordination, and the use efficiency of the product is optimized.

Description

Technical Field

[0001] This invention relates to the field of glaze technology, specifically to a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain and its preparation method. Background Technology

[0002] Porcelain resembling jade is a prized possession admired and collected. The body and glaze of these ceramics are key areas of research. Firstly, body research: This involves selecting the chemical composition and plasticity of the raw materials, controlling processing parameters, and importantly, controlling the firing temperature curve (heating rate, temperature point, conversion point, holding point, cooling rate), the concentration of the firing atmosphere (oxidation, reduction), and the oxidation-reduction conversion point. To improve quality and yield, a bisque firing followed by glaze firing is employed. Secondly, glaze research: Similarly, this involves selecting the chemical composition of the raw materials, controlling the glaze formula and processing technology, and ensuring its compatibility with the body (coefficient of expansion, bonding strength).

[0003] Existing glazed ceramic products generally have low transparency. In order to optimize their performance, the gloss and whiteness of the ceramic products tend to decrease, making it difficult to improve the transparency, gloss and whiteness of the products in a coordinated manner, which limits the efficiency of the products. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain and its preparation method, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain, comprising the following raw materials in parts by weight:

[0007] Feldspar 45~55, quartz 15~25, modified calcined talc 5~15, calcite 5~15, Suzhou clay 5~10, zinc oxide 4~8, modified hydroxyapatite 3~10, barium carbonate 5~15.

[0008] This invention also provides a method for preparing a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain, comprising the following steps:

[0009] Glaze processing;

[0010] a. Weigh the ingredients precisely according to the above formula and grind them in a wet ball mill;

[0011] b. The grinding media consists of feed, balls, and water in a ratio of 1:(1.5~2):0.6 by weight.

[0012] c. Ball milling time 48 hours, mill fineness 0.2~0.3% (residue on 10,000-mesh sieve), specific gravity 1.55~1.65 g / cm³;

[0013] d. The glaze slurry is stored in tanks and pools and stirred constantly to prevent sedimentation. The storage and aging time is one month.

[0014] Glazing;

[0015] Stir and age the glaze slurry evenly, then pump it into the working glaze bucket and pass it through an 80-100 mesh sieve. The specific gravity of the glaze slurry is 1.55-1.65 g / cm³.

[0016] Glazing methods such as dipping, rinsing, and spraying are used to apply glaze slurry to the surface of the moistened bisque, with a glaze layer thickness of 0.6~1mm.

[0017] The glazed body is dried at a temperature of 80~100℃ or naturally until the moisture content is below 1%;

[0018] Glazing;

[0019] The dried glazed blanks are placed in the kiln shelves or saggars and fired in a reducing atmosphere at a temperature of 1300~1320℃ for 10~12 hours.

[0020] Preferably, the method for preparing the modified calcined talc is as follows:

[0021] S01: First, heat-treat the calcined talc at 210~230℃ for 5~10min, then cool it to 50~55℃ at a rate of 2~5℃ / min, and keep it at that temperature to obtain heat-insulated calcined talc.

[0022] S02: Mix 3-5 parts of yttrium nitrate solution, 1-3 parts of chitosan solution, 2-4 parts of sodium carboxymethyl cellulose and 1-2 parts of silica sol to obtain a conditioning agent;

[0023] S03: Then add 10-15% of the total amount of heat-insulating calcined talc to the heat-insulating calcined talc, ball mill it, and after ball milling, wash it with water and dry it to obtain modified calcined talc.

[0024] Preferably, the yttrium nitrate solution has a mass fraction of 3-6%; the chitosan solution has a mass fraction of 5-7%.

[0025] Preferably, the ball milling conditions are: ball milling at a rotation speed of 1000~1500 r / min for 1~2 hours.

[0026] Preferably, the modification method of the modified hydroxyapatite is as follows:

[0027] S01: Place hydroxyapatite in a sodium citrate solution with a mass fraction of 10% (3-5 times the total amount of hydroxyapatite) and stir until homogeneous. Then add lignin (5-10% of the total amount of hydroxyapatite) and silane coupling agent (1-3% of the total amount of hydroxyapatite) and stir until homogeneous to obtain hydroxyapatite solution.

[0028] S02: Add sodium dodecylbenzenesulfonate (3-6% of the total amount of aluminum borate whiskers) and lanthanum sulfate solution (1-2% of the total amount of aluminum borate whiskers) to aluminum borate whiskers, and then ball mill at a speed of 500-1000 r / min for 1-2 h. After ball milling, wash with water and dry to obtain aluminum borate whisker modifier.

[0029] S03: Aluminum borate whisker modifier and hydroxyapatite liquid are ultrasonically treated at a weight ratio of 1:5. After treatment, the mixture is washed with water and dried to obtain modified hydroxyapatite.

[0030] Preferably, the lanthanum sulfate solution has a mass fraction of 4-8%.

[0031] Preferably, the ultrasonic power of the ultrasonic treatment is 350~450W, and the ultrasonic time is 20~30min.

[0032] Preferably, the silane coupling agent is silane coupling agent KH560.

[0033] The method for preparing the green blank is as follows:

[0034] a. Formula: 30-40% kaolin, 10-15% porcelain stone, 10-15% quartz, 10-15% clay, 3-5% magnesia, 15-25% feldspar;

[0035] b. Weigh precisely according to the above formula and pulverize in a wet ball mill;

[0036] The grinding media consist of feed, balls, and water in a ratio of 1:(1.5~2):0.7.

[0037] c. The ball milling time is 24 hours, and the fineness of the output is: 0.8~1% residue on a 10,000-mesh sieve and 1.5~1.6 g / cm³.

[0038] d. The ball-milled slurry is continuously stirred in the slurry storage tank to prevent sedimentation. The slurry is pumped to the filter press to press and dewater it to a mud cake with a moisture content of 25-30%. It is then dragged to the mud silo for homogenization and aging for 1-2 months to make the moisture content uniform and the sodium humate aging process enhance the plasticity of the slurry.

[0039] e. The homogenized and aged clay cake is repeatedly vacuum-kneaded 2-3 times in a vacuum kneader (95% vacuum) to remove air from the clay, make the moisture uniform, make the structure dense, improve the plasticity, and the moisture content of the clay is 20-22%.

[0040] forming

[0041] Different forming processes are used depending on the shape of the blank, including rolling, hand-pulling, and slip casting.

[0042] The molding process fixes the geometry of the blank. Since the blank contains moisture, it still has plasticity and is prone to softening and collapsing. Drying and dehydration are carried out at a temperature of 60~80℃ or by natural drying.

[0043] After the blank has dried and shaped, the surface of the blank is rough and uneven and the dimensions are inaccurate. Use a knife or sandpaper to refine the surface of the blank, and use a brush with water to make the surface of the blank smooth and the dimensions accurate.

[0044] After fine finishing, the blank is dried at a temperature of 80~100℃ or naturally until the moisture content is below 1%;

[0045] Bisque firing: to improve the mechanical strength of the green body and reduce the breakage rate, the dried and finely trimmed green body is fired in a kiln at 750~800℃ for 6~8 hours, so that the mechanical crystal water in the green body evaporates, organic matter carbonizes, some carbonate and sulfate substances decompose, quartz crystals are transformed, the weight of the green body is reduced, and the green body has a certain mechanical strength after bisque firing.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] This invention, by controlling the process and the firing temperature and atmosphere requirements, can produce jade-like porcelain products with high transparency, high whiteness, and high gloss. The glaze developed in this study is suitable for both high-whiteness and general-purpose bodies, exhibiting a very high gloss. This glaze has been used on high-whiteness bodies from Dehua, Fujian, and on jade-like and general-purpose bodies from Jingdezhen, with significant results, demonstrating strong adaptability. The main focus of this research is on selecting stable raw materials, strictly controlling the processing, and, importantly, controlling the firing temperature and atmosphere. The fired products can be used as white porcelain or decorated into handicrafts. The process is simple, low-cost, and has a high yield. Furthermore, the glaze formulation utilizes a special process involving modified talc and modified hydroxyapatite, employing a blending and synergistic effect to improve the transparency, gloss, and whiteness of the product, optimizing its usability. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. 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.

[0049] The jade-porcelain thin-bodied, high-gloss, high-transparency, and high-whiteness glaze of this embodiment comprises the following raw materials in parts by weight:

[0050] Feldspar 45~55, quartz 15~25, modified calcined talc 5~15, calcite 5~15, Suzhou clay 5~10, zinc oxide 4-8, modified hydroxyapatite 3~10, barium carbonate 5~15.

[0051] This embodiment describes a method for preparing a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain, comprising the following steps:

[0052] Glaze processing;

[0053] a. Weigh the ingredients precisely according to the above formula and grind them in a wet ball mill;

[0054] b. The grinding media consists of feed, balls, and water in a ratio of 1:(1.5~2):0.6 by weight.

[0055] c. Ball milling time 48 hours, mill fineness 0.2~0.3% (residue on 10,000-mesh sieve), specific gravity 1.55~1.65 g / cm³;

[0056] d. The glaze slurry is stored in tanks and pools and stirred constantly to prevent sedimentation. The storage and aging time is one month.

[0057] Glazing;

[0058] Stir and age the glaze slurry evenly, then pump it into the working glaze bucket and pass it through an 80-100 mesh sieve. The specific gravity of the glaze slurry is 1.55-1.65 g / cm³.

[0059] Glazing methods such as dipping, rinsing, and spraying are used to apply glaze slurry to the surface of the moistened bisque, with a glaze layer thickness of 0.6~1mm.

[0060] The glazed body is dried at a temperature of 80~100℃ or naturally until the moisture content is below 1%;

[0061] Glazing;

[0062] The dried glazed blanks are placed in the kiln shelves or saggars and fired in a reducing atmosphere at a temperature of 1300~1320℃ for 10~12 hours.

[0063] The preparation method of the modified calcined talc in this embodiment is as follows:

[0064] S01: First, heat-treat the calcined talc at 210~230℃ for 5~10min, then cool it to 50~55℃ at a rate of 2~5℃ / min, and keep it at that temperature to obtain heat-insulated calcined talc.

[0065] S02: Mix 3-5 parts of yttrium nitrate solution, 1-3 parts of chitosan solution, 2-4 parts of sodium carboxymethyl cellulose and 1-2 parts of silica sol to obtain a conditioning agent;

[0066] S03: Then add 10-15% of the total amount of heat-insulating calcined talc to the heat-insulating calcined talc, ball mill it, and after ball milling, wash it with water and dry it to obtain modified calcined talc.

[0067] In this embodiment, the yttrium nitrate solution has a mass fraction of 3-6%, and the chitosan solution has a mass fraction of 5-7%.

[0068] The ball milling conditions in this embodiment are: ball milling at a speed of 1000~1500 r / min for 1~2 hours.

[0069] The modification method of the modified hydroxyapatite in this embodiment is as follows:

[0070] S01: Place hydroxyapatite in a sodium citrate solution with a mass fraction of 10% (3-5 times the total amount of hydroxyapatite) and stir until homogeneous. Then add lignin (5-10% of the total amount of hydroxyapatite) and silane coupling agent (1-3% of the total amount of hydroxyapatite) and stir until homogeneous to obtain hydroxyapatite solution.

[0071] S02: Add sodium dodecylbenzenesulfonate (3-6% of the total amount of aluminum borate whiskers) and lanthanum sulfate solution (1-2% of the total amount of aluminum borate whiskers) to aluminum borate whiskers, and then ball mill at a speed of 500-1000 r / min for 1-2 h. After ball milling, wash with water and dry to obtain aluminum borate whisker modifier.

[0072] S03: Aluminum borate whisker modifier and hydroxyapatite liquid are ultrasonically treated at a weight ratio of 1:5. After treatment, the mixture is washed with water and dried to obtain modified hydroxyapatite.

[0073] The lanthanum sulfate solution in this embodiment has a mass fraction of 4-8%.

[0074] In this embodiment, the ultrasonic power of the ultrasonic treatment is 350~450W, and the ultrasonic time is 20~30min.

[0075] The silane coupling agent in this embodiment is silane coupling agent KH560.

[0076] The method for preparing the green blank is as follows:

[0077] a. Formula: 30-40% kaolin, 10-15% porcelain stone, 10-15% quartz, 10-15% clay, 3-5% magnesia, 15-25% feldspar;

[0078] b. Weigh precisely according to the above formula and pulverize in a wet ball mill;

[0079] The grinding media consist of feed, balls, and water in a ratio of 1:(1.5~2):0.7.

[0080] c. The ball milling time is 24 hours, and the fineness of the output is: 0.8~1% residue on a 10,000-mesh sieve and 1.5~1.6 g / cm³.

[0081] d. The ball-milled slurry is continuously stirred in the slurry storage tank to prevent sedimentation. The slurry is pumped to the filter press to press and dewater it to a mud cake with a moisture content of 25-30%. It is then dragged to the mud silo for homogenization and aging for 1-2 months to make the moisture content uniform and the sodium humate aging process enhance the plasticity of the slurry.

[0082] e. The homogenized and aged clay cake is repeatedly vacuum-kneaded 2-3 times in a vacuum kneader (95% vacuum) to remove air from the clay, make the moisture uniform, make the structure dense, improve the plasticity, and the moisture content of the clay is 20-22%.

[0083] forming

[0084] Different forming processes are used depending on the shape of the blank, including rolling, hand-pulling, and slip casting.

[0085] The molding process fixes the geometry of the blank. Since the blank contains moisture, it still has plasticity and is prone to softening and collapsing. Drying and dehydration are carried out at a temperature of 60~80℃ or by natural drying.

[0086] After the blank has dried and shaped, the surface of the blank is rough and uneven and the dimensions are inaccurate. Use a knife or sandpaper to refine the surface of the blank, and use a brush with water to make the surface of the blank smooth and the dimensions accurate.

[0087] After fine finishing, the blank is dried at a temperature of 80~100℃ or naturally until the moisture content is below 1%;

[0088] Bisque firing: To improve the mechanical strength of the green body and reduce the breakage rate, the dried and finely trimmed green body is fired in a kiln at 750~800℃ for 6~8 hours.

[0089] Example 1.

[0090] The jade-porcelain thin-bodied, high-gloss, high-transparency, and high-whiteness glaze of this embodiment comprises the following raw materials in parts by weight:

[0091] Feldspar 45, quartz 15, modified calcined talc 5, calcite 5, Suzhou clay 5, modified hydroxyapatite 3, zinc oxide 4, barium carbonate 5.

[0092] This embodiment describes a method for preparing a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain, comprising the following steps:

[0093] Glaze processing;

[0094] a. Weigh the ingredients precisely according to the above formula and grind them in a wet ball mill;

[0095] b. The grinding media consists of feed, balls, and water in a ratio of 1:1.5:0.6 by weight.

[0096] c. Ball milling time 48 hours, mill fineness 0.2% (residue on 10,000-mesh sieve), specific gravity 1.55 g / cm³;

[0097] d. The glaze slurry is stored in tanks and pools and stirred constantly to prevent sedimentation. The storage and aging time is one month.

[0098] Glazing;

[0099] The glaze slurry, after being stirred and aged evenly, is pumped into the working glaze bucket and passed through an 80-mesh sieve. The specific gravity of the glaze slurry is 1.55 g / cm³.

[0100] Glazing methods such as dipping, rinsing, and spraying are used to apply glaze slurry to the surface of the moistened bisque, with a glaze layer thickness of 0.6 mm.

[0101] The glazed body is dried at 80℃ or naturally until the moisture content is below 1%.

[0102] Glazing;

[0103] The dried glazed blanks are placed in the kiln shelves or saggars and fired in a reducing atmosphere at 1300℃ for 10 hours.

[0104] The preparation method of the modified calcined talc in this embodiment is as follows:

[0105] S01: The calcined talc is first heat-treated at 210℃ for 5 minutes, then cooled to 50℃ at a rate of 2℃ / min and kept at that temperature to obtain heat-insulated calcined talc.

[0106] S02: Mix 3 parts yttrium nitrate solution, 1 part chitosan solution, 2 parts sodium carboxymethyl cellulose and 1 part silica sol to obtain a conditioning agent;

[0107] S03: Then add 10% of the total amount of heat-insulating calcined talc to the heat-insulating calcined talc, ball mill it, and after ball milling, wash it with water and dry it to obtain modified calcined talc.

[0108] In this embodiment, the yttrium nitrate solution has a mass fraction of 3%, and the chitosan solution has a mass fraction of 5%.

[0109] The ball milling conditions in this embodiment are: ball milling at a speed of 1000 r / min for 1 hour.

[0110] The modification method of the modified hydroxyapatite in this embodiment is as follows:

[0111] S01: Place hydroxyapatite in a sodium citrate solution with a mass fraction of 10% (3 times the total amount of hydroxyapatite) and stir until homogeneous. Then add lignin (5% of the total amount of hydroxyapatite) and silane coupling agent (1% of the total amount of hydroxyapatite) and stir until homogeneous to obtain hydroxyapatite solution.

[0112] S02: Add sodium dodecylbenzenesulfonate solution (3% of the total amount of aluminum borate whiskers) and lanthanum sulfate solution (1% of the total amount of aluminum borate whiskers) to aluminum borate whiskers, then ball mill at 500 r / min for 1 h. After ball milling, wash with water and dry to obtain aluminum borate whisker modifier.

[0113] S03: Aluminum borate whisker modifier and hydroxyapatite liquid are ultrasonically treated at a weight ratio of 1:5. After treatment, the mixture is washed with water and dried to obtain modified hydroxyapatite.

[0114] The lanthanum sulfate solution in this embodiment has a mass fraction of 4%.

[0115] In this embodiment, the ultrasonic power of the ultrasonic treatment is 350W and the ultrasonic time is 20min.

[0116] The silane coupling agent in this embodiment is silane coupling agent KH560.

[0117] The method for preparing the green blank is as follows:

[0118] a. Formula: 30% kaolin, 10% porcelain stone, 10% quartz, 10% clay, 3% magnesia, 15% feldspar;

[0119] b. Weigh precisely according to the above formula and pulverize in a wet ball mill;

[0120] The grinding media consist of feed, balls, and water in a ratio of 1:1.5:0.7.

[0121] c. The ball milling time is 24 hours, and the fineness of the output is: 0.8% residue on a 10,000-mesh sieve and 1.5 g / cm³.

[0122] d. The ball-milled slurry is continuously stirred in the slurry storage tank to prevent sedimentation. The slurry is pumped to the filter press to press and dewater it to a mud cake with a moisture content of 25%. It is then dragged to the mud silo for homogenization and aging for 1 month to make the moisture content uniform and to allow the sodium humate to alcoholyze, thereby enhancing the plasticity of the slurry.

[0123] e. The homogenized and aged clay cake is repeatedly vacuum-kneaded twice in a vacuum kneader (95% vacuum) to remove air from the clay, ensure uniform moisture content, and create a dense structure, thereby improving plasticity. The moisture content of the clay is 20%.

[0124] forming

[0125] Different forming processes are used depending on the shape of the blank, including rolling, hand-pulling, and slip casting.

[0126] The molding process fixes the geometry of the blank. Since the blank contains moisture, it still has plasticity and is prone to softening and collapsing. Drying and dehydration are carried out to set the shape at 60°C or by natural drying.

[0127] After the blank has dried and shaped, the surface of the blank is rough and uneven and the dimensions are inaccurate. Use a knife or sandpaper to refine the surface of the blank, and use a brush with water to make the surface of the blank smooth and the dimensions accurate.

[0128] After fine finishing, the blank is dried at 80℃ or naturally until the moisture content is below 1%.

[0129] Bisque firing: To improve the mechanical strength of the green body and reduce the breakage rate, the dried and finely trimmed green body is fired in a kiln at 750℃ for 6 hours.

[0130] Example 2.

[0131] The jade-porcelain thin-bodied, high-gloss, high-transparency, and high-whiteness glaze of this embodiment comprises the following raw materials in parts by weight:

[0132] Feldspar 55, quartz 25, modified calcined talc 15, calcite 15, Suzhou clay 10, zinc oxide 8, modified hydroxyapatite 10, barium carbonate 15.

[0133] This embodiment describes a method for preparing a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain, comprising the following steps:

[0134] Glaze processing;

[0135] a. Weigh the ingredients precisely according to the above formula and grind them in a wet ball mill;

[0136] b. The grinding media consists of feed, balls, and water in a ratio of 1:2:0.6 by weight.

[0137] c. Ball milling time 48 hours, mill fineness 0.3% (residue on 10,000-mesh sieve), specific gravity 1.65 g / cm³;

[0138] d. The glaze slurry is stored in tanks and pools and stirred constantly to prevent sedimentation. The storage and aging time is one month.

[0139] Glazing;

[0140] Stir and age the glaze slurry evenly, then pump it into the working glaze bucket and pass it through a 100-mesh sieve. The specific gravity of the glaze slurry is 1.65 g / cm³.

[0141] Glazing methods such as dipping, rinsing, and spraying are used to apply glaze slurry to the surface of the moistened bisque, with a glaze layer thickness of 1 mm.

[0142] The glazed body is dried at 100℃ or naturally until the moisture content is below 1%;

[0143] Glazing;

[0144] The dried glazed blanks are placed in the kiln shelves or saggars and fired in a reducing atmosphere at 1320℃ for 12 hours.

[0145] The preparation method of the modified calcined talc in this embodiment is as follows:

[0146] S01: The calcined talc is first heat-treated at 230℃ for 10 minutes, then cooled to 55℃ at a rate of 5℃ / min and kept at that temperature to obtain heat-insulated calcined talc.

[0147] S02: Mix 5 parts yttrium nitrate solution, 3 parts chitosan solution, 4 parts sodium carboxymethyl cellulose and 2 parts silica sol to obtain a conditioning agent;

[0148] S03: Then add 15% of the total amount of heat-insulating calcined talc to the heat-insulating calcined talc, ball mill it, and after ball milling, wash it with water and dry it to obtain modified calcined talc.

[0149] In this embodiment, the yttrium nitrate solution has a mass fraction of 6%, and the chitosan solution has a mass fraction of 7%.

[0150] The ball milling conditions in this embodiment are: ball milling at a speed of 1500 r / min for 2 hours.

[0151] The modification method of the modified hydroxyapatite in this embodiment is as follows:

[0152] S01: Place hydroxyapatite in a sodium citrate solution with a mass fraction of 10% (5 times the total amount of hydroxyapatite) and stir until homogeneous. Then add lignin (10% of the total amount of hydroxyapatite) and silane coupling agent (3% of the total amount of hydroxyapatite) and stir until homogeneous to obtain hydroxyapatite solution.

[0153] S02: Add sodium dodecylbenzenesulfonate (6% of the total amount of aluminum borate whiskers) and lanthanum sulfate solution (2% of the total amount of aluminum borate whiskers) to aluminum borate whiskers, and then ball mill at 1000 r / min for 2 h. After ball milling, wash with water and dry to obtain aluminum borate whisker modifier.

[0154] S03: Aluminum borate whisker modifier and hydroxyapatite liquid are ultrasonically treated at a weight ratio of 1:5. After treatment, the mixture is washed with water and dried to obtain modified hydroxyapatite.

[0155] The lanthanum sulfate solution in this embodiment has a mass fraction of 8%.

[0156] In this embodiment, the ultrasonic power of the ultrasonic treatment is 450W and the ultrasonic time is 30min.

[0157] The silane coupling agent in this embodiment is silane coupling agent KH560.

[0158] The method for preparing the green blank is as follows:

[0159] a. Formula: 40% kaolin, 15% porcelain stone, 15% quartz, 15% clay, 5% magnesia, 25% feldspar;

[0160] b. Weigh precisely according to the above formula and pulverize in a wet ball mill;

[0161] The grinding media consist of feed, balls, and water in a ratio of 1:2:0.7.

[0162] c. The ball milling time is 24 hours, and the fineness of the output is: 1% residue on a 10,000-mesh sieve and 1.6 g / cm³.

[0163] d. The ball-milled slurry is continuously stirred in the slurry storage tank to prevent sedimentation. The slurry is pumped to the filter press to press and dewater it to a mud cake with a moisture content of 30%. It is then dragged to the mud silo for homogenization and aging for 2 months to make the moisture content uniform and to allow the sodium humate to alcoholyze, thereby enhancing the plasticity of the slurry.

[0164] e. The homogenized and aged clay cake is repeatedly vacuum-kneaded three times in a vacuum kneader (95% vacuum) to remove air from the clay, ensure uniform moisture content, and create a dense structure, thereby improving plasticity. The moisture content of the clay is 22%.

[0165] forming

[0166] Different forming processes are used depending on the shape of the blank, including rolling, hand-pulling, and slip casting.

[0167] The molding process fixes the geometry of the blank. Since the blank contains moisture, it still has plasticity and is prone to softening and collapsing. Drying and dehydration are necessary for shaping, such as at 80°C or by natural drying.

[0168] After the blank has dried and shaped, the surface of the blank is rough and uneven and the dimensions are inaccurate. Use a knife or sandpaper to refine the surface of the blank, and use a brush with water to make the surface of the blank smooth and the dimensions accurate.

[0169] After fine finishing, the green body is dried at 100℃ or naturally until the moisture content is below 1%.

[0170] Bisque firing: To improve the mechanical strength of the green body and reduce the breakage rate, the dried and finely trimmed green body is fired in a kiln at 800℃ for 8 hours.

[0171] Example 3.

[0172] The jade-porcelain thin-bodied, high-gloss, high-transparency, and high-whiteness glaze of this embodiment comprises the following raw materials in parts by weight:

[0173] Feldspar 50, quartz 20, modified calcined talc 10, calcite 10, Suzhou clay 7.5, zinc oxide 6, modified hydroxyapatite 3~10, barium carbonate 5~15.

[0174] This embodiment describes a method for preparing a thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain, comprising the following steps:

[0175] Glaze processing;

[0176] a. Weigh the ingredients precisely according to the above formula and grind them in a wet ball mill;

[0177] b. The grinding media consists of feed, balls, and water in a ratio of 1:1.75:0.6 by weight.

[0178] c. Ball milling time 48 hours, mill fineness 0.25% (residue on 10,000-mesh sieve), specific gravity 1.60 g / cm³;

[0179] d. The glaze slurry is stored in tanks and pools and stirred constantly to prevent sedimentation. The storage and aging time is one month.

[0180] Glazing;

[0181] The glaze slurry, after being stirred and aged evenly, is pumped into the working glaze bucket and passed through a 90-mesh sieve. The specific gravity of the glaze slurry is 1.60 g / cm³.

[0182] Glazing methods such as dipping, rinsing, and spraying are used to apply glaze slurry to the surface of the moistened bisque, with a glaze layer thickness of 0.8 mm.

[0183] The glazed body is dried at 90℃ or naturally until the moisture content is below 1%.

[0184] Glazing;

[0185] The dried glazed blanks are placed in the kiln shelves or saggars and fired in a reducing atmosphere at 1310℃ for 11 hours.

[0186] The preparation method of the modified calcined talc in this embodiment is as follows:

[0187] S01: The calcined talc is first heat-treated at 220℃ for 7.5 min, then cooled to 52℃ at a rate of 3.5℃ / min and kept at that temperature to obtain heat-insulated calcined talc;

[0188] S02: Mix 4 parts yttrium nitrate solution, 2 parts chitosan solution, 3 parts sodium carboxymethyl cellulose and 1.5 parts silica sol to obtain a conditioning agent;

[0189] S03: Then, add 12.5% ​​of the total amount of heat-insulating calcined talc to the heat-insulating calcined talc, ball mill it, and after ball milling, wash it with water and dry it to obtain modified calcined talc.

[0190] In this embodiment, the yttrium nitrate solution has a mass fraction of 4.5%; the chitosan solution has a mass fraction of 6%.

[0191] The ball milling conditions in this embodiment are: ball milling at a speed of 1250 r / min for 1.5 h.

[0192] The modification method of the modified hydroxyapatite in this embodiment is as follows:

[0193] S01: Place hydroxyapatite in a sodium citrate solution with a mass fraction of 10% (4 times the total amount of hydroxyapatite) and stir until homogeneous. Then add lignin (7.5% of the total amount of hydroxyapatite) and silane coupling agent (2% of the total amount of hydroxyapatite) and stir until homogeneous to obtain hydroxyapatite solution.

[0194] S02: Add sodium dodecylbenzenesulfonate solution (4.5% of the total amount of aluminum borate whiskers) and lanthanum sulfate solution (1.5% of the total amount of aluminum borate whiskers) to aluminum borate whiskers, then ball mill at 750 r / min for 1.5 h. After ball milling, wash with water and dry to obtain aluminum borate whisker modifier.

[0195] S03: Aluminum borate whisker modifier and hydroxyapatite liquid are ultrasonically treated at a weight ratio of 1:5. After treatment, the mixture is washed with water and dried to obtain modified hydroxyapatite.

[0196] The lanthanum sulfate solution in this embodiment has a mass fraction of 6%.

[0197] In this embodiment, the ultrasonic power of the ultrasonic treatment is 400W and the ultrasonic time is 25min.

[0198] The silane coupling agent in this embodiment is silane coupling agent KH560.

[0199] The method for preparing the green blank is as follows:

[0200] a. Formula: 35% kaolin, 12.5% ​​porcelain stone, 12.5% ​​quartz, 12.5% ​​clay, 4% magnesia, 20% feldspar;

[0201] b. Weigh precisely according to the above formula and pulverize in a wet ball mill;

[0202] The grinding media consist of feed, balls, and water in a ratio of 1:1.75:0.7.

[0203] c. The ball milling time is 24 hours, and the fineness of the output is: 0.9% residue on a 10,000-mesh sieve and 1.55 g / cm³.

[0204] d. The ball-milled slurry is continuously stirred in the slurry storage tank to prevent sedimentation. The slurry is pumped to the filter press to press and dewater it to a mud cake with a moisture content of 27.5%. It is then dragged to the mud silo for homogenization and aging for 1.5 months to make the moisture content uniform and to allow the sodium humate to mature, thereby enhancing the plasticity of the slurry.

[0205] e. The homogenized and aged clay cake is repeatedly vacuum-kneaded 2-3 times in a vacuum kneader (95% vacuum) to remove air from the clay, make the moisture uniform, make the structure dense, improve the plasticity, and the moisture content of the clay is 21%.

[0206] forming

[0207] Different forming processes are used depending on the shape of the blank, including rolling, hand-pulling, and slip casting.

[0208] The molding process fixes the geometry of the blank. Since the blank contains moisture, it still has plasticity and is prone to softening and collapsing. Drying and dehydration are carried out to set the shape at 70°C or by natural drying.

[0209] After the blank has dried and shaped, the surface of the blank is rough and uneven and the dimensions are inaccurate. Use a knife or sandpaper to refine the surface of the blank, and use a brush with water to make the surface of the blank smooth and the dimensions accurate.

[0210] After fine finishing, the green body is dried at 90℃ or naturally until the moisture content is below 1%.

[0211] Bisque firing: To improve the mechanical strength of the green body and reduce the breakage rate, the dried and finely trimmed green body is fired in a kiln at 780℃ for 7 hours.

[0212] Comparative Example 1.

[0213] Unlike Example 3, no modified calcined talc was added.

[0214] Comparative Example 2.

[0215] Unlike Example 3, the modified calcined talc is replaced with calcined talc.

[0216] Comparative Example 3.

[0217] Unlike Example 3, no conditioning additives were used in the preparation of the modified calcined talc.

[0218] Comparative Example 4.

[0219] Unlike Example 3, yttrium nitrate solution and silica sol were not used in the preparation of the conditioning additives.

[0220] Comparative Example 5.

[0221] Unlike Example 3, no modified hydroxyapatite was added.

[0222] Comparative Example 6.

[0223] Unlike Example 3, no aluminum borate whisker modifier was added during the preparation of the modified hydroxyapatite.

[0224] Comparative Example 7.

[0225] Unlike Example 3, the hydroxyapatite solution in the preparation of modified hydroxyapatite is prepared by mixing hydroxyapatite and deionized water at a weight ratio of 1:5.

[0226] Comparative Example 8.

[0227] Unlike Example 3, aluminum borate whiskers are used instead of aluminum borate whiskers as the modifier.

[0228] The products from Examples 1-3 and Comparative Examples 1-8 were subjected to performance tests, and the test results are as follows.

[0229] gloss transparency(%) Whiteness (%) Example 1 96 36.7 93.5 Example 2 97 36.8 93.7 Example 3 98 36.9 93.8 Comparative Example 1 81 30.2 86.5 Comparative Example 2 84 31.5 87.2 Comparative Example 3 87 32.8 89.8 Comparative Example 4 90 33.7 90.3 Comparative Example 5 83 26.8 82.4 Comparative Example 6 87 28.3 85.3 Comparative Example 7 90 30.2 87.2 Comparative Example 8 89 29.1 86.8

[0230] As can be seen from Comparative Examples 1-8 and Examples 1-3;

[0231] The product of Example 3 has excellent gloss, transparency and whiteness, and the three properties can be improved in a coordinated manner.

[0232] As can be seen from Comparative Examples 1-8 and Example 3, the performance of the product deteriorates significantly when no modified calcined talc or modified hydroxyapatite is added. The modified calcined talc and modified hydroxyapatite are blended together and work synergistically to significantly improve the performance of the product.

[0233] The performance of products tends to deteriorate when calcined talc is replaced with calcined talc, when no conditioning agent is used in the preparation of modified calcined talc, or when yttrium nitrate solution and silica sol are not used in the preparation of conditioning agents. Similarly, the performance of products also tends to deteriorate when aluminum borate whisker modifier is not added in the preparation of modified hydroxyapatite, when hydroxyapatite solution is prepared by using hydroxyapatite and deionized water at a weight ratio of 1:5, or when aluminum borate whisker modifier is replaced with aluminum borate whiskers. Only the modified calcined talc prepared by the method of this invention, which coordinates the modification of hydroxyapatite, has the most significant performance effect.

[0234] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0235] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a high-gloss high-transparency high-whiteness porcelain thin-body glaze, the high-gloss high-transparency high-whiteness porcelain thin-body glaze comprising the following raw materials by weight: 45-55 of feldspar, 15-25 of quartz, 5-15 of modified calcined talc, 5-15 of calcite, 5-10 of Suzhou soil, 4-8 of zinc oxide, 3-10 of modified hydroxyapatite, and 5-15 of barium carbonate; the method comprising the following steps: glaze processing; a. precisely weighing the above-mentioned formula and putting it into a wet ball mill for crushing processing; b. the grinding medium is material, ball, and water; the ratio is 1: (1.5-2) :0.6; c. the ball milling time is 48 hours; the fineness is 0.2-0.3% of the residue on a 100-mesh screen; and the specific gravity is 1.55-1.65 g / cm3; d. the glaze slurry is stored in tanks and pools and continuously stirred to prevent sedimentation; the storage time is one month; e. glazing; f. the uniformly aged glaze slurry is pumped into a working glaze bucket, and then sieved through an 80-100 mesh screen; the specific gravity of the glaze slurry is 1.55-1.65 g / cm3; g. the glazing method is dipping, spraying, or pouring; the glaze slurry is coated on the surface of the green body; and the thickness of the glaze layer is 0.6-1 mm; h. the glaze body is dried at a temperature of 80-100 DEG C or naturally dried until the water content is less than 1%; i. glaze firing; j. the dried glaze body is placed on a shelf or in a sagger in a kiln; the glaze body is fired at a temperature of 1300-1320 DEG C in a reducing atmosphere for 10-12 hours; and k. the preparation method of the modified calcined talc is as follows: S01: the calcined talc is first heat-treated at 210-230 DEG C for 5-10 min, then cooled to 50-55 DEG C at a rate of 2-5 DEG C / min, and kept at the temperature to obtain the heat-treated calcined talc; S02: 3-5 parts of yttrium nitrate solution, 1-3 parts of chitosan solution, 2-4 parts of sodium carboxymethyl cellulose, and 1-2 parts of silica sol are stirred and mixed uniformly to obtain an adjusting agent; S03: then, the heat-treated calcined talc is added with 10-15% of the adjusting agent based on the total amount of the heat-treated calcined talc; the mixture is ball milled, washed with water, and dried to obtain the modified calcined talc; the modification method of the modified hydroxyapatite is as follows: S01: the hydroxyapatite is stirred uniformly in a 10% sodium citrate solution with a mass fraction of 3-5 times the total amount of the hydroxyapatite; then, 5-10% of lignin based on the total amount of the hydroxyapatite, and 1-3% of silane coupling agent based on the total amount of the hydroxyapatite are added; the mixture is stirred uniformly to obtain a hydroxyapatite solution; S02: 3-6% of dodecylbenzenesulfonic acid sodium based on the total amount of the aluminum borate whisker, and 1-2% of lanthanum sulfate solution based on the total amount of the aluminum borate whisker are added to the aluminum borate whisker; then, the mixture is ball milled at a speed of 500-1000 r / min for 1-2 h; the ball milling is stopped, and the mixture is washed with water and dried to obtain an aluminum borate whisker modifier; S03: the aluminum borate whisker modifier and the hydroxyapatite solution are ultrasonically treated at a weight ratio of 1:5; the ultrasonic treatment is stopped, and the mixture is washed with water and dried to obtain the modified hydroxyapatite; the mass fraction of the yttrium nitrate solution is 3-6%; and the mass fraction of the chitosan solution is 5-7%. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The method for preparing the thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain according to claim 1, characterized in that, ​ 3. The method for preparing the thin-bodied, high-gloss, high-transparency, and high-whiteness glaze for jade porcelain according to claim 1, characterized in that, ​ 4. The method of producing jade porcelain thin high gloss high transparency high whiteness glaze according to claim 3, characterized in that, The lanthanum sulfate solution has a mass fraction of 4-8%.

5. The method of producing jade porcelain thin high gloss high transparency high whiteness glaze according to claim 4, characterized in that, The ultrasonic power of the ultrasonic treatment is 350~450W, and the ultrasonic time is 20~30min.

6. The method of producing jade porcelain thin high gloss high transparency high whiteness glaze according to claim 5, characterized in that, The silane coupling agent is silane coupling agent KH560.

7. The method of producing jade porcelain thin high gloss high transparency high whiteness glaze according to claim 1, characterized in that, The method for preparing the green blank is as follows: a. Formula: 30-40% kaolin, 10-15% porcelain stone, 10-15% quartz, 10-15% clay, 3-5% magnesia, 15-25% feldspar; b. Weigh precisely according to the above formula and pulverize in a wet ball mill; The grinding media consist of feed, balls, and water in a ratio of 1:(1.5~2):0.7; c. The ball milling time is 24 hours, and the fineness of the output is: 0.8~1% residue on a 10,000-mesh sieve and 1.5~1.6 g / cm³. d. The ball-milled slurry is continuously stirred in the slurry storage tank to prevent sedimentation. The slurry is pumped to the filter press to press and dewater it to a mud cake with a moisture content of 25-30%. It is then dragged to the mud silo for homogenization and aging for 1-2 months to make the moisture content uniform and the sodium humate aging process enhance the plasticity of the slurry. e. The homogenized and aged clay cake is repeatedly vacuum-kneaded 2-3 times in a vacuum kneader with a vacuum degree of 95% to remove air from the clay, make the moisture uniform, make the structure dense, improve the plasticity, and the moisture content of the clay is 20-22%. forming; Different forming processes are used depending on the shape of the blank, such as rolling, hand-pulling, and slip casting. The geometric shape of the blank is fixed by forming. The blank contains moisture and is plastic, and is prone to softening and collapsing. It is dried and dehydrated to set the shape, and is naturally dried at a temperature of 60~80℃. After the blank has dried and shaped, the surface of the blank is rough and uneven and the dimensions are inaccurate. Use a knife or sandpaper to refine the surface of the blank, and use a brush with water to make the surface of the blank smooth and the dimensions accurate. After fine finishing, the blank is dried at a temperature of 80~100℃ or naturally until the moisture content is below 1%; Bisque firing: To improve the mechanical strength of the green body and reduce the breakage rate, the dried and finely trimmed green body is fired in a kiln at 750~800℃ for 6~8 hours.