Ceramic glaze and application method thereof in brown-bottom yellow-crystallization-point ceramic finished product

Abstract

The invention 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 dioxide and 8-10 parts of iron oxide red. According to the ceramic glaze and the application method of the ceramic glaze in the brown-base yellow-crystallization-point ceramic finished product, the ceramic finished product in which yellow crystals are uniformly distributed can be stably prepared by controlling the raw material composition of the ceramic glaze and controlling the process of the preparation process of the ceramic finished product, and the whole glaze color of the ceramic finished product is dark brown, and the round yellow crystals are uniformly distributed in the ceramic finished product.

Description

Technical Field

[0001] The invention belongs to the technical field of ceramic daily necessities, and in particular relates to a ceramic glaze and an application method thereof in a brown-bottomed yellow crystallization point ceramic product. Background Art

[0002] Crystalline glaze is a highly decorative artistic glaze, characterized by a certain amount of visible crystals in the glaze, which present various shapes on or in the glaze, such as star, needle or flower leaf shapes, giving a strong artistic effect. Since the microcrystalline iron crystal glaze was fired in the Song Dynasty, and the zinc crystal glaze was fired by the Seger Ceramics and Copenhagen Ceramics at the end of the last century, and the titanium crystal glaze was fired by the Berlin State Ceramics, there has been no substantial breakthrough in crystallized glaze. It can be said that the development path of crystallized glaze technology has not been fully opened up.

[0003] With the development of the times and the diversification of people's aesthetic tastes, crystalline glazes must also innovate. Not only should there be crystal flowers in various shapes and forms, but they should also be set off by colorful tones to conform to the aesthetic trends of the new era.

[0004] However, the raw material selection and proportion of crystalline glaze are complicated, and its production process is complicated and sensitive. Therefore, it is difficult to control the crystallization and color tone of crystalline glaze, resulting in poor product repeatability and low yield. Summary of the invention

[0005] The purpose of the present invention is to overcome the above problems existing in the prior art, and to provide a ceramic glaze and an application method thereof in a ceramic product with a brown base and yellow crystallization points. 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 color throughout and round yellow crystals evenly distributed therein can be stably prepared.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

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

[0008] In a second aspect, the present invention provides an application method of a ceramic glaze in a brown-based yellow crystallization point ceramic product, characterized in that the method comprises the following steps: adding water to the ceramic glaze and placing it in a ball mill for wet grinding to prepare a ceramic glaze slurry, soaking a ceramic body in the ceramic glaze slurry, drying it, firing it, and cooling it to prepare a brown-based yellow crystallization point ceramic product.

[0009] Further, the method comprises the following steps:

[0010] S1: Preparation of ceramic body

[0011] The feldspar green body is selected, and after being thrown into shape, the green body is trimmed and dried, and then bisque fired at 800-900℃ to obtain the ceramic green body;

[0012] S2: Preparation of ceramic glaze slurry

[0013] The frit, quartz, calcite, zinc oxide, Longyan soil, calcined talc, calcium phosphate, titanium dioxide, and red iron oxide are weighed according to the weight proportions, and mixed to prepare a mixed glaze, and the mixed glaze is added into a ball mill, wet-milled with water for 15 to 20 minutes, and then sieved to prepare a ceramic glaze slurry;

[0014] S3: cleaning the surface of the ceramic body prepared in step S1, soaking the cleaned ceramic body in the ceramic glaze slurry prepared in step S2, and after the soaking is completed, drying the soaked ceramic body for standby use to prepare a dried ceramic body;

[0015] S4: In an oxidizing atmosphere, the dried ceramic body is placed in a roller kiln for firing to prepare a brown-bottomed yellow-crystallized ceramic product;

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

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

[0018] S41: Warm up

[0019] Under an oxidizing atmosphere, the air-dried ceramic green body is loaded into a kiln head of a roller kiln, and is transported from the kiln head to a preheating zone of the roller kiln for preheating to prepare a preheated ceramic green body;

[0020] S42: Firing

[0021] The preheated ceramic green body in the preheating zone is transferred to the firing zone for firing, and is kept warm after firing to prepare a finished ceramic;

[0022] S43: Cooling

[0023] The finished porcelain is transported to the cooling zone at the kiln tail of the roller kiln for cooling. After cooling to room temperature, a brown-bottomed yellow-crystallization-point ceramic product is obtained.

[0024] Furthermore, in step S2, in the ball mill, the mass ratio of the mixed glaze, grinding ball stone and water 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 slurry concentration in the ceramic glaze slurry is 46 to 48 degrees.

[0027] Furthermore, in step S2, during the screening process, the mesh size of the screen is 120 to 160 meshes.

[0028] Furthermore, in step S3, the soaking time is 5 to 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 to 850°C, and the preheating time is 3 hours.

[0031] Further, in step S42, the temperature of the sintering zone is 850-1180°C, and the sintering time is 0.4-0.8 hours;

[0032] The insulation temperature is 1180-1210°C, and the insulation time is 2-3 hours.

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

[0034] The insulation temperature is 1180-1210°C and the insulation time is 2.5 hours.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The firing temperature of traditional crystalline glaze is generally 1350°C, and the firing cycle is 14 to 16 hours. The ceramic glaze provided by the present invention and its application method in brown-bottom yellow crystallization point ceramic products have lower firing temperature and shorter firing cycle than traditional crystalline glazes, which saves energy consumption, reduces costs and improves product competitiveness.

[0037] 2. In the present 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 color and round yellow crystals evenly distributed therein can be stably prepared.

[0038] 3. In the present invention, the color of the ceramic brown base mainly comes from red iron oxide, and the yellow crystallization point is due to the fact that the glaze contains a certain amount of crystalline substances, such as zinc oxide, titanium dioxide, calcium phosphate, red iron oxide, etc. In the application method of the ceramic glaze provided by the present invention in the finished ceramic product with brown base and yellow crystallization point, the relevant parameters of the firing process are adjusted, so that each raw material is gradually melted to reach a saturated state at a reasonable time and temperature, and then slowly cooled to precipitate crystals, thereby forming a yellow crystallization point. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0041] Among them, the frit is a boron-containing frit, and adding a proper amount of it into the glaze can make the melting of the glaze easier and more stable;

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

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

[0044] Further, the method comprises the following steps:

[0045] S1: Preparation of ceramic body

[0046] The prepared green body clay is formed by throwing, trimming and drying, and then bisque fired at 800-900℃ to obtain a ceramic green body;

[0047] S2: Preparation of ceramic glaze slurry

[0048] According to the weight ratio, frit, quartz, calcite, zinc oxide, Longyan soil, calcined talc, calcium phosphate, titanium dioxide, and red iron oxide are weighed and mixed to prepare a mixed glaze, and the mixed glaze is added into a ball mill, and wet-milled for 15 to 20 minutes with water, and then sieved to prepare a ceramic glaze slurry. In the prepared ceramic glaze slurry, the glaze slurry concentration is 46 to 48 degrees;

[0049] In step S2, in the ball mill, the mass ratio of the mixed glaze, grinding ball stone and water is 1: (1.5-1.8): (0.5-0.8), specifically, in the ball mill, the mass ratio of the mixed glaze, grinding ball stone and water 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 screening process, the mesh size is 120-160 meshes, specifically, the mesh size is 120 meshes;

[0052] S3: cleaning the surface of the ceramic body prepared in step S1, soaking the cleaned ceramic body in the ceramic glaze slurry prepared in step S2 for 5 to 6 seconds, and after the soaking is completed, drying the soaked ceramic body for standby use to prepare a dried ceramic body;

[0053] S4: In an oxidizing atmosphere, the dried ceramic body is placed in a roller kiln for firing to prepare a brown-bottomed yellow-crystallized ceramic product;

[0054] Among them, 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: in an oxidizing atmosphere, the dried ceramic body is loaded into the kiln head of the roller kiln, the kiln head temperature is room temperature to 200°C, the residence time is 0.5 to 1.5 hours, specifically, the residence time can be 1 hour; it is transported to the preheating zone of the roller kiln through the kiln head for preheating, the preheating zone temperature is 200 to 850°C, the preheating time is 2 to 4 hours, specifically, the preheating time can be 3 hours, and then transported to the firing zone, the firing zone temperature is 850 to 1180°C, the firing time is 0.4 to 0.8 hours, specifically, the firing time can be The temperature of the first stage is 1180-600°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours. The temperature of the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. Finally, the prepared ceramic product is sent out from the kiln tail. Specifically, the firing process is as follows:

[0056] S41: Warm up

[0057] Under an oxidizing atmosphere, the dried ceramic body is loaded into the kiln head of the roller kiln, and transported to the preheating zone of the roller kiln through the kiln head for preheating to prepare a preheated ceramic body; wherein the kiln head temperature is room temperature to 200° C., 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., the preheating time is 2 to 4 hours, specifically, the preheating time can be 3 hours;

[0058] S42: Firing

[0059] The preheated ceramic body in the preheating zone is transferred to the firing zone for firing, and the fired ceramic body is kept warm after firing to prepare the ceramic; wherein the temperature of the firing zone is 850-1180°C, the firing time is 0.4-0.8 hours, and specifically, the firing time can be 0.5 hours; the holding temperature is 1180-1210°C, and the holding time is 2-3 hours, and specifically, the holding time can be 2.5 hours;

[0060] S43: Cooling

[0061] The finished porcelain 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°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours; the temperature in the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, the finally prepared ceramic product is sent out from the tail of the kiln to prepare a brown-based yellow crystallization point ceramic product.

[0062] The firing temperature of traditional crystalline glaze is generally 1350°C, and the firing cycle is 14 to 16 hours. The ceramic glaze provided by the present invention and its application method in brown-based yellow crystallization point ceramic products have lower firing temperature and shorter firing cycle than traditional crystalline glazes, thus saving energy and reducing costs. Moreover, brown-based yellow crystallization point ceramic products can be stably fired, thereby improving the competitiveness of the products.

[0063] The following are specific examples. Unless otherwise specified in the following examples, all raw materials can be obtained from commercial sources.

[0064] Example 1

[0065] The present embodiment provides a ceramic glaze, which includes the following raw materials, measured by weight: 27 parts of frit, 18 parts of quartz, 12 parts of calcite, 12 parts of zinc oxide, 5 parts of longyan soil, 2 parts of calcined talc, 17 parts of calcium phosphate, 10 parts of titanium dioxide, and 8 parts of red iron oxide.

[0066] This embodiment also provides a method for applying a ceramic glaze in a finished ceramic product with a brown base and a yellow crystallization point, comprising the following steps:

[0067] S1: Select feldspar green body clay, throw and shape it, trim and dry it, and then bisque-fire it at 800℃ to obtain a ceramic green body;

[0068] S2: Weigh 27 parts of frit, 18 parts of quartz, 12 parts of calcite, 12 parts of zinc oxide, 5 parts of Longyan soil, 2 parts of calcined talc, 17 parts of calcium phosphate, 10 parts of titanium dioxide, and 8 parts of red iron oxide respectively, and mix them to prepare a mixed glaze, add the mixed glaze into a ball mill, and add water to wet grind for 15 minutes, wherein the weight ratio of the mixed glaze, grinding ball stone and water in the ball mill is 1:1.5:0.6, and the wet-milled slurry is passed through a 120-mesh sieve and iron is removed to obtain a ceramic glaze slurry, the concentration of the ceramic glaze slurry is 46 degrees, and the speed of the ball mill is 400r / min;

[0069] S3: Wipe the ceramic body prepared in step S1 with a sponge to remove dust from the surface, soak the ceramic body in the ceramic glaze slurry prepared in step S2 for 5 seconds, and dry the soaked ceramic body for later use, thereby obtaining a dried ceramic body;

[0070] S4: loading the dried ceramic body into a kiln for firing, using a roller kiln for firing, that is, firing into porcelain in a kiln under an oxidizing atmosphere through three processes of preheating, firing, and cooling; the firing process specifically includes the following steps:

[0071] S41: Under an oxidizing atmosphere, the dried ceramic body is first loaded into a kiln head of a roller kiln, the kiln head temperature is room temperature, the residence time is 1 hour, and then transported to a preheating zone of the roller kiln through the kiln head for preheating, the preheating zone temperature is 200° C., the preheating time is 3 hours, and a preheated ceramic body is prepared;

[0072] S42: transferring the preheated ceramic body in the preheating zone to the firing zone for firing, and keeping the temperature after firing to prepare a finished ceramic; wherein the temperature of the firing zone is 850° C., the firing time is 0.5 h; the holding temperature is 1180° C., and the holding time is 2.5 h;

[0073] S43: The finished porcelain 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°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours; the temperature in the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based yellow crystallization point ceramic product is prepared.

[0074] Example 2

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

[0076] This embodiment also provides a method for applying a ceramic glaze in a finished ceramic product with a brown base and a yellow crystallization point, comprising the following steps:

[0077] S1: Select feldspar green body clay, throw and shape it, trim and dry it, and then bisque-fire it at 850℃ to obtain a ceramic green body;

[0078] S2: Weigh 29 parts of frit, 19 parts of quartz, 13 parts of calcite, 14 parts of zinc oxide, 6 parts of Longyan soil, 3 parts of calcined talc, 18 parts of calcium phosphate, 10 parts of titanium dioxide, and 9 parts of red iron oxide respectively, and mix them to prepare a mixed glaze, add the mixed glaze into a ball mill, and add water to wet grind for 18 minutes, wherein the weight ratio of the mixed glaze, grinding ball stone and water in the ball mill is 1:1.6:0.6, and the wet-milled slurry is passed through a 120-mesh sieve and iron is removed to obtain a ceramic glaze slurry, the concentration of the ceramic glaze slurry is 47 degrees, and the rotation speed of the ball mill is 500r / min;

[0079] S3: Wipe the ceramic body prepared in step S1 with a sponge to remove dust from the surface, soak the ceramic body in the ceramic glaze slurry prepared in step S2 for 5.5 seconds, and dry the soaked ceramic body for later use, thereby obtaining a dried ceramic body;

[0080] S4: loading the dried ceramic body into a kiln for firing, using a roller kiln for firing, that is, firing into porcelain in a kiln under an oxidizing atmosphere through three processes of preheating, firing, and cooling; the firing process specifically includes the following steps:

[0081] S41: Under an oxidizing atmosphere, the dried ceramic body is first loaded into a kiln head of a roller kiln, the kiln head temperature is 100° C., the residence time is 1 hour, and then transported to a preheating zone of the roller kiln through the kiln head for preheating, the preheating zone temperature is 600° C., the preheating time is 3 hours, and a preheated ceramic body is prepared;

[0082] S42: transferring the preheated ceramic body in the preheating zone to the firing zone for firing, and keeping the temperature after firing to prepare a finished ceramic; wherein the temperature of the firing zone is 1000°C, the firing time is 0.5h; the holding temperature is 1200°C, and the holding time is 2.5h;

[0083] S43: The finished porcelain 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°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours; the temperature in the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based yellow crystallization point ceramic product is prepared.

[0084] Example 3

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

[0086] This embodiment also provides a method for applying a ceramic glaze in a finished ceramic product with a brown base and a yellow crystallization point, comprising the following steps:

[0087] S1: Select feldspar green body clay, throw and shape it, trim and dry it, and then bisque-fire it at 860°C to obtain a ceramic green body;

[0088] S2: 31 parts of frit, 20 parts of quartz, 14 parts of calcite, 18 parts of zinc oxide, 6 parts of Longyan soil, 3 parts of calcined talc, 19 parts of calcium phosphate, 10 parts of titanium dioxide, and 9 parts of red iron oxide were weighed and mixed to prepare a mixed glaze, and the mixed glaze was added to a ball mill and wet-milled for 17 minutes with water, wherein the weight ratio of the mixed glaze, grinding ball stone, and water in the ball mill was 1:1.6:0.6, and the wet-milled slurry was passed through a 120-mesh sieve and iron was removed to obtain a ceramic glaze slurry, the concentration of the ceramic glaze slurry was 47 degrees, and the rotation speed of the ball mill was 500r / min;

[0089] S3: Wipe the ceramic body prepared in step S1 with a sponge to remove dust from the surface, soak the ceramic body in the ceramic glaze slurry prepared in step S2 for 5.4 seconds, and dry the soaked ceramic body for later use, thereby obtaining a dried ceramic body;

[0090] S4: loading the dried ceramic body into a kiln for firing, using a roller kiln for firing, that is, firing into porcelain in a kiln under an oxidizing atmosphere through three processes of preheating, firing, and cooling; the firing process specifically includes the following steps:

[0091] S41: Under an oxidizing atmosphere, the dried ceramic body is first loaded into a kiln head of a roller kiln, the kiln head temperature is 100° C., the residence time is 1 hour, and then transported to a preheating zone of the roller kiln through the kiln head for preheating, the preheating zone temperature is 600° C., the preheating time is 3 hours, and a preheated ceramic body is prepared;

[0092] S42: transferring the preheated ceramic body in the preheating zone to the firing zone for firing, and keeping the temperature after firing to prepare a finished ceramic; wherein the temperature of the firing zone is 1000°C, the firing time is 0.5h; the holding temperature is 1200°C, and the holding time is 2.5h;

[0093] S43: The finished porcelain 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°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours; the temperature in the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based yellow crystallization point ceramic product is prepared.

[0094] Example 4

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

[0096] This embodiment also provides a method for applying a ceramic glaze in a finished ceramic product with a brown base and a yellow crystallization point, comprising the following steps:

[0097] S1: Select feldspar green body clay, throw into shape, trim and dry the green body, and then bisque-fire at 870°C to obtain a ceramic green body;

[0098] S2: Weigh 33 parts of frit, 22 parts of quartz, 15 parts of calcite, 20 parts of zinc oxide, 6 parts of Longyan soil, 3 parts of calcined talc, 20 parts of calcium phosphate, 10 parts of titanium dioxide, and 9 parts of red iron oxide respectively, and mix them to prepare a mixed glaze, add the mixed glaze into a ball mill, and add water to wet grind for 19 minutes, wherein the weight ratio of the mixed glaze, grinding ball stone and water in the ball mill is 1:1.8:0.8, and the wet-milled slurry is passed through a 120-mesh sieve and iron is removed to obtain a ceramic glaze slurry, the concentration of the ceramic glaze slurry is 47 degrees, and the speed of the ball mill is 600r / min;

[0099] S3: Wipe the ceramic body prepared in step S1 with a sponge to remove dust from the surface, soak the ceramic body in the ceramic glaze slurry prepared in step S2 for 5.8 seconds, and dry the soaked ceramic body for later use, thereby obtaining a dried ceramic body;

[0100] S4: loading the dried ceramic body into a kiln for firing, using a roller kiln for firing, that is, firing into porcelain in a kiln under an oxidizing atmosphere through three processes of preheating, firing, and cooling; the firing process specifically includes the following steps:

[0101] S41: Under an oxidizing atmosphere, the dried ceramic body is first loaded into a kiln head of a roller kiln, the kiln head temperature is 200° C., the residence time is 1 hour, and then transported to a preheating zone of the roller kiln through the kiln head for preheating, the preheating zone temperature is 850° C., the preheating time is 3 hours, and a preheated ceramic body is prepared;

[0102] S42: transferring the preheated ceramic body in the preheating zone to the firing zone for firing, and keeping the temperature after firing to prepare a finished ceramic; wherein the temperature of the firing zone is 1180° C., the firing time is 0.5 h; the holding temperature is 1210° C., and the holding time is 2.5 h;

[0103] S43: The finished porcelain 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°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours; the temperature in the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based yellow crystallization point ceramic product is prepared.

[0104] Example 5

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

[0106] This embodiment also provides a method for applying a ceramic glaze in a finished ceramic product with a brown base and a yellow crystallization point, comprising the following steps:

[0107] S1: Select feldspar green body clay, throw and shape it, trim and dry it, and then bisque-fire it at 900℃ to obtain a ceramic green body;

[0108] S2: Weigh 33 parts of frit, 22 parts of quartz, 15 parts of calcite, 20 parts of zinc oxide, 8 parts of Longyan soil, 4 parts of calcined talc, 20 parts of calcium phosphate, 10 parts of titanium dioxide, and 10 parts of red iron oxide respectively, and mix them to prepare a mixed glaze, add the mixed glaze into a ball mill, and add water to wet grind for 20 minutes, wherein the weight ratio of the mixed glaze, grinding ball stone and water in the ball mill is 1:1.5:0.6, and the wet-milled slurry is passed through a 120-mesh sieve and iron is removed to obtain a ceramic glaze slurry, the concentration of the ceramic glaze slurry is 48 degrees, and the speed of the ball mill is 600r / min;

[0109] S3: Wipe the ceramic body prepared in step S1 with a sponge to remove dust from the surface, soak the ceramic body in the ceramic glaze slurry prepared in step S2 for 6 seconds, and dry the soaked ceramic body for later use, thereby obtaining a dried ceramic body;

[0110] S4: loading the dried ceramic body into a kiln for firing, using a roller kiln for firing, that is, firing into porcelain in a kiln under an oxidizing atmosphere through three processes of preheating, firing, and cooling; the firing process specifically includes the following steps:

[0111] S41: Under an oxidizing atmosphere, the dried ceramic body is first loaded into a kiln head of a roller kiln, the kiln head temperature is 200° C., the residence time is 1 hour, and then transported to a preheating zone of the roller kiln through the kiln head for preheating, the preheating zone temperature is 850° C., the preheating time is 3 hours, and a preheated ceramic body is prepared;

[0112] S42: transferring the preheated ceramic body in the preheating zone to the firing zone for firing, and keeping the temperature after firing to prepare a finished ceramic; wherein the temperature of the firing zone is 1180° C., the firing time is 0.5 h; the holding temperature is 1210° C., and the holding time is 2.5 h;

[0113] S43: The finished porcelain 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°C, that is, it slowly drops from 1180°C to 600°C, and the residence time is 0.5 hours; the temperature in the second stage is 600°C to room temperature, that is, it slowly drops from 600°C to room temperature, and the residence time is 2.5 hours. After cooling to room temperature, a brown-based yellow crystallization point ceramic product is prepared.

[0114] Comparative Example 1

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

[0116] The method for applying the ceramic glaze in a finished ceramic product is carried out by referring to the method for applying a ceramic glaze in a finished ceramic product with a brown base and yellow crystallization point provided in Example 1.

[0117] Comparative Example 2

[0118] This comparative example provides a ceramic glaze, which is different from Example 1 in that in this comparative example, the addition amount of titanium dioxide is replaced by 5 parts.

[0119] The method for applying the ceramic glaze in a finished ceramic product is carried out by referring to the method for applying a ceramic glaze in a finished ceramic product with a brown base and yellow crystallization point provided in Example 1.

[0120] Comparative Example 3

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

[0122] The method for applying the ceramic glaze in a finished ceramic product is carried out by referring to the method for applying a ceramic glaze in a finished ceramic product with a brown base and yellow crystallization point provided in Example 1.

[0123] Comparative Example 4

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

[0125] The method for applying the ceramic glaze in a finished ceramic product is carried out by referring to the method for applying a ceramic glaze in a finished ceramic product with a brown base and yellow crystallization point provided in Example 1.

[0126] Comparative Example 5

[0127] This comparative example provides a ceramic glaze, which is different from Example 1 in that in this comparative example, the addition amount of zinc oxide is replaced by 7 parts.

[0128] The method for applying the ceramic glaze in a finished ceramic product is carried out by referring to the method for applying a ceramic glaze in a finished ceramic product with a brown base and yellow crystallization point provided in Example 1.

[0129] Experimental example

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

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

[0132]

[0133] It can be seen from the data in Table 1 that the ceramic product prepared in Example 1 has a smooth and delicate glaze surface, with round yellow crystals evenly distributed therein, and the glossiness is better than that of Comparative Examples 1 to 5;

[0134] Compared with Example 1, Comparative Examples 1 to 5 changed the raw material composition of the ceramic glaze. The results showed that it was impossible to prepare a ceramic product with a dark brown glaze and round yellow crystals evenly distributed therein.

[0135] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0136] The above shows and describes 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, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A ceramic glaze, characterized in that: The raw materials are as follows, calculated by weight: 27 to 33 parts of frit, 18 to 22 parts of quartz, 12 to 15 parts of calcite, 12 to 20 parts of zinc oxide, 5 to 8 parts of longyan soil, 2 to 4 parts of calcined talc, 17 to 20 parts of calcium phosphate, 10 parts of titanium dioxide, and 8 to 10 parts of red iron oxide.

2. A method for applying the ceramic glaze according to claim 1 in a finished ceramic product with a brown-bottom yellow crystallization point, characterized in that: The method comprises the following steps: adding water to the ceramic glaze and wet-grinding it in a ball mill to prepare ceramic glaze slurry; soaking a ceramic body in the ceramic glaze slurry, drying it, firing it, and cooling it to prepare a brown-bottomed yellow crystal point ceramic product.

3. The method for applying a ceramic glaze according to claim 2 in a brown-bottom yellow crystallization point ceramic product, characterized in that: The method comprises the following steps: S1: Preparation of ceramic body The feldspar green body is selected, and after being thrown into shape, the green body is trimmed and dried, and then bisque fired at 800-900℃ to obtain the ceramic green body; S2: Preparation of ceramic glaze slurry The frit, quartz, calcite, zinc oxide, Longyan soil, calcined talc, calcium phosphate, titanium dioxide, and red iron oxide are weighed according to the weight proportions, and mixed to prepare a mixed glaze, and the mixed glaze is added into a ball mill, wet-milled with water for 15 to 20 minutes, and then sieved to prepare a ceramic glaze slurry; S3: cleaning the surface of the ceramic body prepared in step S1, soaking the cleaned ceramic body in the ceramic glaze slurry prepared in step S2, and after the soaking is completed, drying the soaked ceramic body for standby use, thereby preparing a dried ceramic body; S4: In an oxidizing atmosphere, the dried ceramic body is placed in a roller kiln for firing to prepare a brown-bottomed yellow-crystallized ceramic product; The roller kiln comprises a kiln head, a preheating zone, a firing zone and a kiln tail cooling zone; The firing process specifically comprises the following steps: S41: Warm up Under an oxidizing atmosphere, the air-dried ceramic green body is loaded into a kiln head of a roller kiln, and is transported from the kiln head to a preheating zone of the roller kiln for preheating to prepare a preheated ceramic green body; S42: Firing The preheated ceramic green body in the preheating zone is transferred to the firing zone for firing, and is kept warm after firing to prepare a finished ceramic; S43: Cooling The finished porcelain is transported to the cooling zone at the kiln tail of the roller kiln for cooling. After cooling to room temperature, a brown-bottomed yellow-crystallization-point ceramic product is obtained.

4. The method for applying a ceramic glaze according to claim 3 in a finished ceramic product with a brown-bottom yellow crystallization point, characterized in that: In step S2, in the ball mill, the mass ratio of the mixed glaze, grinding ball stone and water is 1: (1.5-1.8): (0.5-0.8).

5. The method for applying a ceramic glaze according to claim 3 in a finished ceramic product with a brown-bottom yellow crystallization point, characterized in that: In step S2, during the wet grinding process of the ball mill, the rotation speed of the ball mill is 400-600 r / min.

6. The method for applying a ceramic glaze according to claim 3 in a finished ceramic product with a brown-bottom yellow crystallization point, characterized in that: In step S2, the glaze slurry concentration in the ceramic glaze slurry is 46 to 48 degrees.

7. The method for applying a ceramic glaze according to claim 3 in a finished ceramic product with a brown-bottom yellow crystallization point, characterized in that: In step S2, during the screening process, the mesh size of the screen is 120-160 meshes.

8. The method for applying a ceramic glaze according to claim 3 in a finished ceramic product with a brown-bottom yellow crystallization point, characterized in that: In step S3, the soaking time is 5 to 6 seconds.

9. The method for applying a ceramic glaze according to claim 3 in a brown-bottom yellow crystallization point ceramic product, characterized in that: In step S41, the kiln head temperature is room temperature to 200°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.

10. The method for applying a ceramic glaze in a brown-bottom yellow crystallization point ceramic product according to claim 3, characterized in that: In step S42, the temperature of the sintering zone is 850-1180°C, and the sintering time is 0.4-0.8 hours; The insulation temperature is 1180-1210°C, and the insulation time is 2-3 hours.

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