Ceramic glaze and its application method in brown base yellow crystal point ceramic finished product

Abstract

The application belongs to the technical field of ceramic daily necessities, and particularly discloses a ceramic glaze, which comprises the following raw materials in parts by weight: 27-33 parts of frit, 18-22 parts of quartz, 12-15 parts of calcite, 12-20 parts of zinc oxide, 5-8 parts of Longyan soil, 2-4 parts of calcined talc, 17-20 parts of calcium phosphate, 10 parts of titanium white, and 8-10 parts of red iron oxide. The application provides a ceramic glaze and an application method of the ceramic glaze in brown-bottom yellow crystal point ceramic products. Through control of the raw material composition of the ceramic glaze and process control of the preparation process of the ceramic product, a ceramic product with a deep brown glaze color and uniformly distributed yellow crystal bodies in a circular shape can be stably prepared.

Description

Technical Field

[0001] This invention belongs to the field of ceramic daily necessities technology, and in particular relates to a ceramic glaze and its application method in brown-based ceramic products with yellow crystallization points. Background Technology

[0002] Crystalline glaze is a highly decorative art glaze, characterized by the presence of a certain number of visible crystals within it. These crystals manifest in various forms on or within the glaze surface, such as star-shaped, needle-shaped, or floral-leaf-shaped, creating a strong artistic effect. Since the discovery of microcrystalline iron glaze during the Song Dynasty, and the development of zinc crystalline glaze by the Seger and Copenhagen ceramic workshops and titanium crystalline glaze by the Berlin State Ceramic Workshop in the late 20th century, there has been no substantial breakthrough in crystalline glaze technology. It can be said that the development path of crystalline glaze technology has not yet been fully explored.

[0003] With the development of the times and the diversification of people's aesthetics, crystalline glazes must also innovate. They should not only have a variety of crystal patterns, but also be complemented by a variety of colorful hues to meet the aesthetic trends of the new era.

[0004] However, the selection and proportioning of raw materials for crystalline glazes are complex, and their manufacturing process is complicated and sensitive. Therefore, it is difficult to control the crystallization and color of crystalline glazes, resulting in poor product repeatability and low yield. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems in the prior art and provide a ceramic glaze and its application method in brown-based ceramic products with yellow crystals. By controlling the raw material composition of the ceramic glaze and the process control of the preparation process of the ceramic product, a ceramic product with a dark brown glaze and uniformly distributed yellow crystals in a round shape can be stably prepared.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides a ceramic glaze comprising, by weight, the following raw materials: 27-33 parts frit, 18-22 parts quartz, 12-15 parts calcite, 12-20 parts zinc oxide, 5-8 parts argillaceous clay, 2-4 parts calcined talc, 17-20 parts calcium phosphate, 10 parts titanium dioxide, and 8-10 parts iron oxide red.

[0008] Secondly, the present invention provides a method for applying ceramic glaze in a brown-based yellow crystallization point ceramic product, characterized in that the method includes the following steps: adding water to the ceramic glaze and wet grinding it in a ball mill to prepare a ceramic glaze slurry; immersing the ceramic body in the ceramic glaze slurry, drying it, and then firing and cooling it to prepare a brown-based yellow crystallization point ceramic product.

[0009] Furthermore, the method includes the following steps:

[0010] S1: Preparation of ceramic green body

[0011] The ceramic body is obtained by selecting feldspar clay, shaping it on a potter's wheel, trimming and drying it, and then firing it at 800-900℃.

[0012] S2: Preparation of ceramic glaze slurry

[0013] Weigh the frit, quartz, calcite, zinc oxide, draconite, calcined talc, calcium phosphate, titanium dioxide, and iron oxide red according to the stated weight proportions, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill, add water and wet mill for 15-20 minutes, then sieve to prepare a ceramic glaze slurry.

[0014] S3: Clean the surface of the ceramic blank prepared in step S1, immerse the cleaned ceramic blank in the ceramic glaze prepared in step S2, and after immersion, dry the immersed ceramic blank for later use to prepare the dried ceramic blank.

[0015] S4: Under an oxidizing atmosphere, the dried ceramic blanks are loaded into a roller kiln for firing to prepare a brown-based ceramic product with yellow crystal points.

[0016] The roller kiln includes a kiln head, a preheating zone, a firing zone, and a kiln tail cooling zone;

[0017] The firing process specifically includes the following steps:

[0018] S41: Preheating

[0019] Under an oxidizing atmosphere, the dried ceramic blanks are loaded into the kiln head of the roller kiln and transported to the preheating zone of the roller kiln for preheating to prepare preheated ceramic blanks.

[0020] S42: Firing

[0021] The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic.

[0022] S43: Cooling

[0023] The ceramic is transported to the cooling zone at the tail of the roller kiln for cooling. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained.

[0024] Further, in step S2, the mass ratio of the mixed glaze, grinding balls, and water in the ball mill is 1:(1.5-1.8):(0.5-0.8).

[0025] Furthermore, in step S2, during the wet grinding process of the ball mill, the rotation speed of the ball mill is 400-600 r / min.

[0026] Furthermore, in step S2, the glaze concentration in the ceramic glaze slurry is 46–48 degrees.

[0027] Furthermore, in step S2, during the sieving process, the screen mesh size is 120-160 mesh.

[0028] Furthermore, in step S3, the soaking time is 5-6 seconds.

[0029] Furthermore, in step S41, the kiln head temperature is room temperature to 300°C, and the residence time is 0.5 to 1.5 hours; the preheating zone temperature is 200 to 850°C, and the preheating time is 2 to 4 hours.

[0030] Furthermore, in step S41, the kiln head temperature is room temperature to 300°C, and the residence time is 1 hour; the preheating zone temperature is 200°C to 850°C, and the preheating time is 3 hours.

[0031] Furthermore, in step S42, the temperature of the firing zone is 850–1180°C, and the firing time is 0.4–0.8 hours;

[0032] The insulation temperature is 1180~1210℃, and the insulation time is 2~3 hours.

[0033] Furthermore, in step S42, the temperature of the firing zone is 850–1180°C, and the firing time is 0.5 hours;

[0034] The insulation temperature is 1180~1210℃, and the insulation time is 2.5 hours.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. The firing temperature of traditional crystalline glazes is generally 1350℃, and the firing cycle is 14 to 16 hours. The ceramic glaze provided by this invention and its application method in brown-based yellow crystalline point ceramic products have a lower firing temperature and shorter firing cycle than traditional crystalline glazes, saving energy, reducing costs, and improving product competitiveness.

[0037] 2. In this invention, by controlling the raw material composition of the ceramic glaze and the process control of the preparation process of the ceramic finished product, a ceramic finished product with a dark brown glaze and uniformly distributed yellow crystals in a round shape can be stably prepared.

[0038] 3. In this invention, the brown base color of the ceramic mainly comes from iron oxide red, and the yellow crystallization points are due to the presence of a certain amount of crystalline substances in the glaze, such as zinc oxide, titanium dioxide, calcium phosphate, iron oxide red, etc. In the application method of the ceramic glaze in the brown base ceramic product with yellow crystallization points provided by this invention, by adjusting the relevant parameters of the firing process, the raw materials are gradually melted to a saturated state at a reasonable time and temperature, and then slowly cooled to precipitate crystals, thereby forming yellow crystallization points. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0040] In a first aspect, the present invention provides a ceramic glaze comprising, by weight, the following raw materials: 27-33 parts frit, 18-22 parts quartz, 12-15 parts calcite, 12-20 parts zinc oxide, 5-8 parts argillaceous clay, 2-4 parts calcined talc, 17-20 parts calcium phosphate, 10 parts titanium dioxide, and 8-10 parts iron oxide red.

[0041] Among them, the frit is a boron-containing frit, and adding an appropriate amount to the glaze can make the glaze melt more easily and stably;

[0042] The main component of iron oxide red is iron oxide, which can be extracted from minerals, specifically a magnetic hematite mineral.

[0043] In a second aspect, the present invention provides a method for applying ceramic glaze in a brown-based ceramic product with yellow crystallization points. The method includes the following steps: adding water to the ceramic glaze and wet grinding it in a ball mill to prepare a ceramic glaze slurry; immersing the ceramic body in the ceramic glaze slurry, drying it, and then firing and cooling it to prepare a brown-based ceramic product with yellow crystallization points.

[0044] Furthermore, the method includes the following steps:

[0045] S1: Preparation of ceramic green body

[0046] After the prepared clay body is shaped by throwing, trimmed and dried, it is then bisque fired at 800-900℃ to obtain the ceramic body.

[0047] S2: Preparation of ceramic glaze slurry

[0048] Weigh out the frit, quartz, calcite, zinc oxide, draconite, calcined talc, calcium phosphate, titanium dioxide, and iron oxide red by weight, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill, add water and wet mill for 15-20 minutes, then sieve to prepare a ceramic glaze slurry. The glaze slurry concentration is 46-48 degrees.

[0049] In step S2, the mass ratio of the mixed glaze, grinding balls and water in the ball mill is 1:(1.5~1.8):(0.5~0.8), specifically, the mass ratio of the mixed glaze, grinding balls and water in the ball mill is 1:1.5:0.6.

[0050] In step S2, during the wet grinding process of the ball mill, the rotation speed of the ball mill is 400-600 r / min, specifically, the rotation speed of the ball mill is 600 r / min;

[0051] In step S2, during the sieving process, the screen mesh size is 120-160 mesh, specifically, the screen mesh size is 120 mesh.

[0052] S3: Clean the surface of the ceramic blank prepared in step S1, immerse the cleaned ceramic blank in the ceramic glaze prepared in step S2 for 5-6 seconds, and after immersion, dry the immersed ceramic blank for later use to prepare the dried ceramic blank.

[0053] S4: Under an oxidizing atmosphere, the dried ceramic blanks are loaded into a roller kiln for firing to prepare a brown-based ceramic product with yellow crystal points.

[0054] The roller kiln includes a kiln head, a preheating zone, a firing zone, and a kiln tail cooling zone.

[0055] The firing process specifically includes the following steps: Under an oxidizing atmosphere, the dried ceramic blank is loaded into the kiln head of the roller kiln. The kiln head temperature is room temperature to 200°C, and the residence time is 0.5 to 1.5 hours, specifically, 1 hour. It is then conveyed from the kiln head to the preheating zone of the roller kiln for preheating. The preheating zone temperature is 200 to 850°C, and the preheating time is 2 to 4 hours, specifically, 3 hours. Finally, it is conveyed to the firing zone, where the temperature is 850 to 1180°C, and the firing time is 0.4 to 0.8 hours, specifically, the firing time can be... The initial holding time is 0.5 hours, with a holding temperature of 1180–1210℃ and a holding time of 2–3 hours (specifically, 2.5 hours). Finally, the ceramic is transferred to a cooling zone for cooling. The cooling process is divided into two stages: the first stage temperature is 1180–600℃, slowly decreasing from 1180℃ to 600℃ for 0.5 hours; the second stage temperature is 600℃–room temperature, slowly decreasing from 600℃ to room temperature for 2.5 hours. The final ceramic product is then discharged from the kiln tail. The specific firing process is as follows:

[0056] S41: Preheating

[0057] Under an oxidizing atmosphere, dried ceramic blanks are loaded into the kiln head of a roller kiln and transported to the preheating zone of the roller kiln for preheating to prepare preheated ceramic blanks. The kiln head temperature is room temperature to 200°C, and the residence time is 0.5 to 1.5 hours, specifically, the residence time can be 1 hour. The preheating zone temperature is 200 to 850°C, and the preheating time is 2 to 4 hours, specifically, the preheating time can be 3 hours.

[0058] S42: Firing

[0059] The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is held at a certain temperature to obtain ceramic. The temperature of the firing zone is 850-1180℃, and the firing time is 0.4-0.8 hours, specifically 0.5 hours. The holding temperature is 1180-1210℃, and the holding time is 2-3 hours, specifically 2.5 hours.

[0060] S43: Cooling

[0061] The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. The cooling process is carried out in two stages, as follows: The first stage temperature is 1180-600℃, that is, the temperature is slowly reduced from 1180℃ to 600℃, and the residence time is 0.5 hours. The second stage temperature is 600℃ to room temperature, that is, the temperature is slowly reduced from 600℃ to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, the final ceramic product is sent out from the kiln tail, and the finished product is a brown-based ceramic product with yellow crystal points.

[0062] Traditional crystalline glazes are typically fired at 1350℃ for 14-16 hours. The ceramic glaze and its application method in brown-based yellow crystalline point ceramic products provided by this invention have a lower firing temperature and shorter firing cycle than traditional crystalline glazes, saving energy and reducing costs. Moreover, it can stably produce brown-based yellow crystalline point ceramic products, thereby improving the competitiveness of the products.

[0063] The following are specific embodiments. Unless otherwise specified, all raw materials in the following embodiments can be obtained commercially.

[0064] Example 1

[0065] This embodiment provides a ceramic glaze, which, by weight, comprises the following raw materials: 27 parts frit, 18 parts quartz, 12 parts calcite, 12 parts zinc oxide, 5 parts argillaceous clay, 2 parts calcined talc, 17 parts calcium phosphate, 10 parts titanium dioxide, and 8 parts iron oxide red.

[0066] This embodiment also provides a method for applying ceramic glaze to brown-based ceramic products with yellow crystallization points, including the following steps:

[0067] S1: Select feldspar clay body material, shape it on a potter's wheel, trim and dry it, and then fire it at 800℃ to obtain the ceramic body.

[0068] S2: Weigh out 27 parts of frit, 18 parts of quartz, 12 parts of calcite, 12 parts of zinc oxide, 5 parts of dragon rock clay, 2 parts of calcined talc, 17 parts of calcium phosphate, 10 parts of titanium dioxide, and 8 parts of iron oxide red, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill, add water and wet mill for 15 minutes. The weight ratio of the mixed glaze, grinding balls and water in the ball mill is 1:1.5:0.6. After wet milling, pass the slurry through a 120-mesh sieve to remove iron, and you will get a ceramic glaze slurry with a concentration of 46 degrees and a ball mill speed of 400 r / min.

[0069] S3: Wipe the ceramic blank prepared in step S1 with a sponge to remove surface dust, immerse the ceramic blank in the ceramic glaze prepared in step S2 for 5 seconds, and then dry the immersed ceramic blank for later use to obtain the dried ceramic blank.

[0070] S4: The dried ceramic blanks are loaded into the kiln for firing, using a roller kiln. This involves preheating, firing, and cooling within the kiln under an oxidizing atmosphere to produce porcelain. The firing process specifically includes the following steps:

[0071] S41: Under an oxidizing atmosphere, the dried ceramic blank is first loaded into the kiln head of the roller kiln. The kiln head temperature is room temperature and the residence time is 1 hour. Then, it is transported through the kiln head to the preheating zone of the roller kiln for preheating. The preheating zone temperature is 200℃ and the preheating time is 3 hours to prepare a preheated ceramic blank.

[0072] S42: The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic. The firing zone temperature is 850℃ and the firing time is 0.5h. The holding temperature is 1180℃ and the holding time is 2.5h.

[0073] S43: The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. The cooling process is carried out in two stages, as follows: The temperature in the first stage is 1180-600℃, that is, the temperature is slowly reduced from 1180℃ to 600℃, and the residence time is 0.5 hours. The temperature in the second stage is 600℃ to room temperature, that is, the temperature is slowly reduced from 600℃ to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained.

[0074] Example 2

[0075] This embodiment provides a ceramic glaze, which, by weight, includes the following raw materials: 29 parts frit, 19 parts quartz, 13 parts calcite, 14 parts zinc oxide, 6 parts argillaceous clay, 3 parts calcined talc, 18 parts calcium phosphate, 10 parts titanium dioxide, and 9 parts iron oxide red.

[0076] This embodiment also provides a method for applying ceramic glaze to brown-based ceramic products with yellow crystallization points, including the following steps:

[0077] S1: Select feldspar clay body material, shape it on a potter's wheel, trim and dry it, and then fire it at 850℃ to obtain the ceramic body.

[0078] S2: Weigh out 29 parts of frit, 19 parts of quartz, 13 parts of calcite, 14 parts of zinc oxide, 6 parts of argillaceous clay, 3 parts of calcined talc, 18 parts of calcium phosphate, 10 parts of titanium dioxide, and 9 parts of iron oxide red, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill and wet-mill with water for 18 minutes. The weight ratio of the mixed glaze, grinding balls, and water in the ball mill is 1:1.6:0.6. After wet milling, pass the slurry through a 120-mesh sieve to remove iron, and you will get a ceramic glaze slurry with a concentration of 47 degrees and a ball mill speed of 500 r / min.

[0079] S3: Wipe the ceramic blank prepared in step S1 with a sponge to remove surface dust, immerse the ceramic blank in the ceramic glaze prepared in step S2 for 5.5 seconds, and dry the immersed ceramic blank for later use to obtain a dried ceramic blank.

[0080] S4: The dried ceramic blanks are loaded into the kiln for firing, using a roller kiln. This involves preheating, firing, and cooling within the kiln under an oxidizing atmosphere to produce porcelain. The firing process specifically includes the following steps:

[0081] S41: Under an oxidizing atmosphere, the dried ceramic blank is first loaded into the kiln head of the roller kiln. The kiln head temperature is 100℃ and the residence time is 1 hour. Then, it is transported through the kiln head to the preheating zone of the roller kiln for preheating. The preheating zone temperature is 600℃ and the preheating time is 3 hours to prepare a preheated ceramic blank.

[0082] S42: The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic. The firing zone temperature is 1000℃ and the firing time is 0.5h. The holding temperature is 1200℃ and the holding time is 2.5h.

[0083] S43: The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. The cooling process is carried out in two stages, as follows: The temperature in the first stage is 1180-600℃, that is, the temperature is slowly reduced from 1180℃ to 600℃, and the residence time is 0.5 hours. The temperature in the second stage is 600℃ to room temperature, that is, the temperature is slowly reduced from 600℃ to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained.

[0084] Example 3

[0085] This embodiment provides a ceramic glaze, which, by weight, includes the following raw materials: 31 parts frit, 20 parts quartz, 14 parts calcite, 18 parts zinc oxide, 6 parts argillaceous clay, 3 parts calcined talc, 19 parts calcium phosphate, 10 parts titanium dioxide, and 9 parts iron oxide red.

[0086] This embodiment also provides a method for applying ceramic glaze to brown-based ceramic products with yellow crystallization points, including the following steps:

[0087] S1: Select feldspar clay body material, shape it on a potter's wheel, trim and dry it, and then fire it at 860℃ to obtain the ceramic body.

[0088] S2: Weigh out 31 parts of frit, 20 parts of quartz, 14 parts of calcite, 18 parts of zinc oxide, 6 parts of argillaceous clay, 3 parts of calcined talc, 19 parts of calcium phosphate, 10 parts of titanium dioxide, and 9 parts of iron oxide red, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill and wet-mill with water for 17 minutes. The weight ratio of the mixed glaze, grinding balls, and water in the ball mill is 1:1.6:0.6. After wet milling, pass the slurry through a 120-mesh sieve to remove iron, and you will get a ceramic glaze slurry with a concentration of 47 degrees and a ball mill speed of 500 r / min.

[0089] S3: Wipe the ceramic blank prepared in step S1 with a sponge to remove surface dust, immerse the ceramic blank in the ceramic glaze prepared in step S2 for 5.4 seconds, and then dry the immersed ceramic blank for later use to obtain a dried ceramic blank.

[0090] S4: The dried ceramic blanks are loaded into the kiln for firing, using a roller kiln. This involves preheating, firing, and cooling within the kiln under an oxidizing atmosphere to produce porcelain. The firing process specifically includes the following steps:

[0091] S41: Under an oxidizing atmosphere, the dried ceramic blank is first loaded into the kiln head of the roller kiln. The kiln head temperature is 100℃ and the residence time is 1 hour. Then, it is transported through the kiln head to the preheating zone of the roller kiln for preheating. The preheating zone temperature is 600℃ and the preheating time is 3 hours to prepare a preheated ceramic blank.

[0092] S42: The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic. The firing zone temperature is 1000℃ and the firing time is 0.5h. The holding temperature is 1200℃ and the holding time is 2.5h.

[0093] S43: The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. The cooling process is carried out in two stages, as follows: The temperature in the first stage is 1180-600℃, that is, the temperature is slowly reduced from 1180℃ to 600℃, and the residence time is 0.5 hours. The temperature in the second stage is 600℃ to room temperature, that is, the temperature is slowly reduced from 600℃ to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained.

[0094] Example 4

[0095] This embodiment provides a ceramic glaze, which, by weight, includes the following raw materials: 33 parts frit, 22 parts quartz, 15 parts calcite, 20 parts zinc oxide, 6 parts argillaceous clay, 3 parts calcined talc, 20 parts calcium phosphate, 10 parts titanium dioxide, and 9 parts iron oxide red.

[0096] This embodiment also provides a method for applying ceramic glaze to brown-based ceramic products with yellow crystallization points, including the following steps:

[0097] S1: Select feldspar clay body material, shape it on a potter's wheel, trim and dry it, and then fire it at 870℃ to obtain the ceramic body.

[0098] S2: Weigh out 33 parts of frit, 22 parts of quartz, 15 parts of calcite, 20 parts of zinc oxide, 6 parts of argillaceous clay, 3 parts of calcined talc, 20 parts of calcium phosphate, 10 parts of titanium dioxide, and 9 parts of iron oxide red, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill and wet-mill with water for 19 minutes. The weight ratio of the mixed glaze, grinding balls, and water in the ball mill is 1:1.8:0.8. After wet milling, pass the slurry through a 120-mesh sieve to remove iron, and you will get a ceramic glaze slurry with a concentration of 47 degrees and a ball mill speed of 600 r / min.

[0099] S3: Wipe the ceramic blank prepared in step S1 with a sponge to remove surface dust, immerse the ceramic blank in the ceramic glaze prepared in step S2 for 5.8 seconds, and then dry the immersed ceramic blank for later use to obtain a dried ceramic blank.

[0100] S4: The dried ceramic blanks are loaded into the kiln for firing, using a roller kiln. This involves preheating, firing, and cooling within the kiln under an oxidizing atmosphere to produce porcelain. The firing process specifically includes the following steps:

[0101] S41: Under an oxidizing atmosphere, the dried ceramic blank is first loaded into the kiln head of the roller kiln. The kiln head temperature is 200℃ and the residence time is 1 hour. Then, it is transported through the kiln head to the preheating zone of the roller kiln for preheating. The preheating zone temperature is 850℃ and the preheating time is 3 hours to prepare a preheated ceramic blank.

[0102] S42: The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic. The firing zone temperature is 1180℃ and the firing time is 0.5h. The holding temperature is 1210℃ and the holding time is 2.5h.

[0103] S43: The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. The cooling process is carried out in two stages, as follows: The temperature in the first stage is 1180-600℃, that is, the temperature is slowly reduced from 1180℃ to 600℃, and the residence time is 0.5 hours. The temperature in the second stage is 600℃ to room temperature, that is, the temperature is slowly reduced from 600℃ to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained.

[0104] Example 5

[0105] This embodiment provides a ceramic glaze, which, by weight, includes the following raw materials: 33 parts frit, 22 parts quartz, 15 parts calcite, 20 parts zinc oxide, 8 parts argillaceous clay, 4 parts calcined talc, 20 parts calcium phosphate, 10 parts titanium dioxide, and 10 parts iron oxide red.

[0106] This embodiment also provides a method for applying ceramic glaze to brown-based ceramic products with yellow crystallization points, including the following steps:

[0107] S1: Select feldspar clay body material, shape it on a potter's wheel, trim and dry it, and then fire it at 900℃ to obtain the ceramic body.

[0108] S2: Weigh out 33 parts of frit, 22 parts of quartz, 15 parts of calcite, 20 parts of zinc oxide, 8 parts of argillaceous clay, 4 parts of calcined talc, 20 parts of calcium phosphate, 10 parts of titanium dioxide, and 10 parts of iron oxide red, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill and wet-mill with water for 20 minutes. The weight ratio of the mixed glaze, grinding balls, and water in the ball mill is 1:1.5:0.6. After wet milling, pass the slurry through a 120-mesh sieve to remove iron, and you will get a ceramic glaze slurry with a concentration of 48 degrees and a ball mill speed of 600 r / min.

[0109] S3: Wipe the ceramic blank prepared in step S1 with a sponge to remove surface dust, immerse the ceramic blank in the ceramic glaze prepared in step S2 for 6 seconds, and then dry the immersed ceramic blank for later use to obtain the dried ceramic blank.

[0110] S4: The dried ceramic blanks are loaded into the kiln for firing, using a roller kiln. This involves preheating, firing, and cooling within the kiln under an oxidizing atmosphere to produce porcelain. The firing process specifically includes the following steps:

[0111] S41: Under an oxidizing atmosphere, the dried ceramic blank is first loaded into the kiln head of the roller kiln. The kiln head temperature is 200℃ and the residence time is 1 hour. Then, it is transported through the kiln head to the preheating zone of the roller kiln for preheating. The preheating zone temperature is 850℃ and the preheating time is 3 hours to prepare a preheated ceramic blank.

[0112] S42: The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic. The firing zone temperature is 1180℃ and the firing time is 0.5h. The holding temperature is 1210℃ and the holding time is 2.5h.

[0113] S43: The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. The cooling process is carried out in two stages, as follows: The temperature in the first stage is 1180-600℃, that is, the temperature is slowly reduced from 1180℃ to 600℃, and the residence time is 0.5 hours. The temperature in the second stage is 600℃ to room temperature, that is, the temperature is slowly reduced from 600℃ to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained.

[0114] Comparative Example 1

[0115] This comparative example provides a ceramic glaze, which differs from Example 1 in that the amount of iron oxide red added is replaced with 15 parts.

[0116] The application method of this ceramic glaze in finished ceramic products is the same as that provided in Example 1, which describes the application method of a ceramic glaze in a brown-based ceramic product with yellow crystallization points.

[0117] Comparative Example 2

[0118] This comparative example provides a ceramic glaze, which differs from Example 1 in that the amount of titanium dioxide added is replaced with 5 parts.

[0119] The application method of this ceramic glaze in finished ceramic products is the same as that provided in Example 1, which describes the application method of a ceramic glaze in a brown-based ceramic product with yellow crystallization points.

[0120] Comparative Example 3

[0121] This comparative example provides a ceramic glaze, which differs from Example 1 in that the amount of frit added is replaced with 40 parts.

[0122] The application method of this ceramic glaze in finished ceramic products is the same as that provided in Example 1, which describes the application method of a ceramic glaze in a brown-based ceramic product with yellow crystallization points.

[0123] Comparative Example 4

[0124] This comparative example provides a ceramic glaze, which differs from Example 1 in that no calcined talc is added in this comparative example.

[0125] The application method of this ceramic glaze in finished ceramic products is the same as that provided in Example 1, which describes the application method of a ceramic glaze in a brown-based ceramic product with yellow crystallization points.

[0126] Comparative Example 5

[0127] This comparative example provides a ceramic glaze, which differs from Example 1 in that the amount of zinc oxide added is replaced with 7 parts.

[0128] The application method of this ceramic glaze in finished ceramic products is the same as that provided in Example 1, which describes the application method of a ceramic glaze in a brown-based ceramic product with yellow crystallization points.

[0129] Experimental Example

[0130] The ceramic products prepared in the examples and comparative examples were tested, and the relevant test items and test indicators are shown in the table below:

[0131] Table 1 shows the appearance and performance test results of the ceramic products prepared in the examples and comparative examples.

[0132]

[0133] As can be seen from the data in Table 1, the ceramic product prepared in Example 1 has a smooth and delicate glaze, with round yellow crystals evenly distributed in it, and its gloss is better than that of Comparative Examples 1 to 5.

[0134] Compared with Example 1, Comparative Examples 1 to 5, by changing the raw material composition of the ceramic glaze, showed that none of them could produce a ceramic finished product with a dark brown glaze throughout and uniformly distributed round yellow crystals.

[0135] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0136] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A method for applying a ceramic glaze to a brown-based ceramic product with yellow crystalline points, characterized in that, The method includes the following steps: S1: Preparation of ceramic green body The ceramic body is obtained by selecting feldspar clay, shaping it on a potter's wheel, trimming and drying it, and then firing it at 800~900℃. S2: Preparation of ceramic glaze slurry Weigh out 27-33 parts of frit, 18-22 parts of quartz, 12-15 parts of calcite, 12-20 parts of zinc oxide, 5-8 parts of dragon rock clay, 2-4 parts of calcined talc, 17-20 parts of calcium phosphate, 10 parts of titanium dioxide, and 8-10 parts of iron oxide red by weight, and mix them to prepare a mixed glaze. Add the mixed glaze to a ball mill, add water and wet mill for 15-20 minutes, then sieve to prepare a ceramic glaze slurry. During the wet grinding process in the ball mill, the rotation speed of the ball mill is 400~600 r / min; During the sieving process, the screen mesh size is 120~160 mesh; S3: Clean the surface of the ceramic blank prepared in step S1, immerse the cleaned ceramic blank in the ceramic glaze prepared in step S2, and after immersion, dry the immersed ceramic blank for later use to obtain the dried ceramic blank. The soaking time is 5-6 seconds; S4: Under an oxidizing atmosphere, the dried ceramic blanks are loaded into a roller kiln for firing to prepare a brown-based ceramic product with yellow crystal points. The roller kiln includes a kiln head, a preheating zone, a firing zone, and a kiln tail cooling zone; The firing process specifically includes the following steps: S41: Preheating Under an oxidizing atmosphere, the dried ceramic blanks are loaded into the kiln head of the roller kiln and transported to the preheating zone of the roller kiln for preheating to prepare preheated ceramic blanks. S42: Firing The preheated ceramic blank in the preheating zone is transferred to the firing zone for firing. After firing, it is kept at a certain temperature to prepare ceramic. S43: Cooling The ceramic product is transported to the cooling zone at the tail of the roller kiln for cooling. After cooling to room temperature, a brown-based ceramic product with yellow crystal points is obtained. In step S2, the glaze concentration in the ceramic glaze slurry is 46~48 degrees. In step S41, the kiln head temperature is room temperature to 200℃, and the residence time is 0.5 to 1.5 hours; the preheating zone temperature is 200 to 850℃, and the preheating time is 2 to 4 hours. In step S42, the temperature of the firing zone is 850~1180℃, and the firing time is 0.4~0.8 hours; The insulation temperature is 1180~1210℃, and the insulation time is 2~3 hours.

2. The method for applying a ceramic glaze according to claim 1 to a brown-based ceramic product with yellow crystallization points, characterized in that, In step S2, the mass ratio of the mixed glaze, grinding stones, and water in the ball mill is 1:(1.5~1.8):(0.5~0.8).

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