A kind of crackle Langyao red glaze porcelain and its preparation method

Abstract

Disclosed is a crackle Langyao red-glazed porcelain and a preparation method thereof. The Langyao red-glazed porcelain comprises a biscuit and a Langyao red glaze material attached to the biscuit. The Langyao red glaze material is composed of the following raw materials: Dehua quartz, kaolin, cuprite, magnesium oxide, manganese oxide, frit, brucite, and lanthanum oxide. The present application defines the raw material composition of the Langyao red glaze material and combines it with a specific firing process to ensure that the prepared Langyao red-glazed porcelain has a bright glaze surface with fine crackles distributed on the surface, and the upper half of the glazed porcelain is light red and the lower half is bright red. This has a unique artistic effect and can meet the market demand for Langyao red-glazed porcelain.

Description

Technical Field

[0001] The invention belongs to the field of glaze porcelain preparation, and particularly relates to a crackle-cut Lang kiln red glaze porcelain and a preparation method thereof. Background Art

[0002] Langyao Red Glaze, also known as "Ox Blood Red," originated at the Jingdezhen kilns in the early Qing Dynasty. It is the most vibrant of my country's traditional precious copper red glazes. Red has long been associated with nobility, dignity, and celebration in China. As a "treasure" among high-temperature colored glazes, Langyao Red Glaze is an excellent ceramic decorative material, offering excellent corrosion resistance and resistance to strong alkaline detergents. In recent years, it has attracted increasing attention and is widely used in the decoration of everyday porcelain, particularly personalized tableware and tea sets.

[0003] Langyao red glaze has been very precious since ancient times, not only because of its bright color, but also because any slight deviation during firing will cause technical problems such as smoking, uneven color, and improper fluidity, which will greatly reduce the qualified rate of ceramic products. Therefore, there is a saying about firing Langyao red: "If you want to be poor, burn Langyao red." Traditional Langyao red glaze generally introduces elements such as lead and cadmium that are toxic to the human body and the environment. If applied to tableware and tea sets, it is easy to cause the migration of lead and cadmium to exceed the standard, which not only does not meet the requirements of national standards, but also affects the health of consumers. Further improvement is needed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a crackle-shaped Langyao red-glazed porcelain. Another purpose is to provide a method for preparing the above-mentioned glazed porcelain.

[0005] The present invention adopts the following technical solutions:

[0006] A crackle Langyao red glaze porcelain, comprising a blank and a Langyao red glaze material attached to the blank.

[0007] The Langyao red glaze material is composed of the following raw materials in parts by weight: 20-30 parts of Dehua quartz, 18-25 parts of kaolin, 8-12 parts of cuprite, 3-5 parts of magnesium oxide, 1-2 parts of manganese oxide, 4-7 parts of frit, 5-10 parts of brucite, and 1-2 parts of lanthanum oxide;

[0008] The mass percentage chemical composition of the frit is as follows: SiO2: 56.86%, Al2O3: 14.36%, Na2O: 7.56%, ZnO: 8.72%, MgO: 6.98%, TiO2: 1.27%, K2O: 4.25%.

[0009] Furthermore, the blank is composed of the following raw materials in parts by weight: 15-18 parts of potassium feldspar, 18-22 parts of Dehua kaolin, 30-35 parts of Dehua quartz, 5-10 parts of pyrophyllite, 4-6 parts of zinc oxide, 3-5 parts of bentonite, 6-8 parts of sericite, and 3-5 parts of magnesite.

[0010] A method for preparing crackle-cut Langyao red-glazed porcelain comprises the following steps:

[0011] Step 1: weighing and mixing the raw materials of the blank and Langyao red glaze according to the raw material formula, crushing, mixing, and wet ball milling the raw materials to prepare blank slurry and Langyao red glaze slurry;

[0012] Step 2: Using the green slurry obtained in step 1 to make a ceramic green body, after the ceramic green body is dried, it is put into a kiln and fired at 860-890° C. for 7-9 hours to obtain a ceramic green body;

[0013] Step 3: Apply the Langyao red glaze slurry prepared in step 1 to the surface of the ceramic blank, and then put it into the kiln. The kiln is cooled at 180°C and then naturally cooled to room temperature to dry the Langyao red glaze slurry.

[0014] Step 4: Place the dried glaze slurry into a kiln and fire it in a reducing atmosphere at a temperature of 1300-1320°C. The firing process is controlled as follows:

[0015] Low temperature stage: the temperature in the kiln rises from room temperature to 720-750℃, and the firing time is 1-2 hours;

[0016] Decomposition and oxidation stage: the temperature in the kiln is raised to 1050-1080℃, and the kiln firing time is 4-6 hours;

[0017] High-temperature reduction stage: the temperature in the kiln rises to 1280-1300℃, and the kiln firing time is 6-8h;

[0018] High-fire insulation stage: the temperature in the kiln is controlled at 1300-1320℃, and the kiln firing time is 4-6 hours;

[0019] Natural cooling stage: The kiln is cooled to room temperature, and the cooling time is extended to more than 12 hours.

[0020] Furthermore, in the high-temperature reduction stage, the volume concentration of carbon monoxide is 5.8-6.3%, and the volume concentration of oxygen is 1.8-2.3%.

[0021] Furthermore, in the high-fire insulation stage, the volume concentration of carbon monoxide is 7.6-8.0%, and the volume concentration of oxygen is 1.0-1.2%.

[0022] Furthermore, in the decomposition and oxidation stage, the volume concentration of carbon monoxide is 1.2-1.5%, and the volume concentration of oxygen is 4.5-4.8%.

[0023] Furthermore, in the step 1, when the Langyao red glaze slurry is wet-milled, the raw materials are wet-milled in a ball mill for 32-36 hours, the grinding medium is water, and the ratio of raw materials: balls: water is 1:1.8-2:1.5-2.

[0024] Furthermore, in the step 1, when the green slurry is wet ball milled, the raw materials are wet ground in the ball mill for 24-28 hours, the grinding medium is water, and the raw material: ball: water = 1:1.3-1.5:1-1.5.

[0025] Furthermore, the thickness of the Langyao red glaze slurry is 0.4-0.6 mm.

[0026] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0027] First, by limiting the raw material composition of the Langyao red glaze and combining it with a specific firing process, the present application aims to produce Langyao red glaze porcelain with a bright glaze surface, fine cracks distributed on the surface, and a light red upper portion and a bright red lower portion, thereby achieving a unique artistic effect and satisfying the market demand for Langyao red glaze porcelain.

[0028] Second, the raw materials used in Langyao Red glaze are all ordinary raw materials. However, through the reasonable raw material composition and adjustment of the proportions, the raw materials also have a synergistic effect with each other. By introducing frit, brucite and lanthanum oxide, and limiting the composition of the frit, the glaze surface is made bright and uniform in color. At the same time, the cuprite, magnesium oxide and manganese oxide used as color developers are evenly distributed, preventing defects such as mottled colors and spots on the glaze surface, thus ensuring a bright and uniform Langyao Red glaze surface.

[0029] Third, by limiting the specific process of the firing process and controlling the specific atmosphere composition during the reduction and holding stages, and coordinating with the glaze composition, the color of the prepared glaze porcelain will not be too black or too green, thus ensuring the uniformity and color rendering of the glaze surface of the prepared Langyao red glaze porcelain;

[0030] Third, the raw materials used for the blank are all ordinary raw materials, but through reasonable raw material composition and adjustment of the proportion, the raw materials also have a synergistic effect on each other. Among them, the introduction of dolomite and sericite promotes the formation of an intermediate layer between the blank and the Langyao red glaze during the firing process, so that the Langyao red glaze can be stably attached to the blank. At the same time, the introduction of sericite can increase the whiteness and brightness of the blank, so that the blank slurry does not need to be iron-removed to ensure the final color of the glaze. DETAILED DESCRIPTION

[0031] The present invention is further described below through specific embodiments.

[0032] A crackle Langyao red-glazed porcelain comprises a blank and a Langyao red glaze material attached to the blank. Specifically, the thickness of the Langyao red glaze slurry is 0.4-0.6 mm.

[0033] The green body is composed of the following raw materials in parts by weight: 15-18 parts of potassium feldspar, 18-22 parts of Dehua kaolin, 30-35 parts of Dehua quartz, 5-10 parts of pyrophyllite, 4-6 parts of zinc oxide, 3-5 parts of bentonite, 6-8 parts of sericite and 3-5 parts of magnesite.

[0034] The Langyao red glaze is composed of the following raw materials in parts by weight: 20-30 parts of Dehua quartz, 18-25 parts of kaolin, 8-12 parts of cuprite, 3-5 parts of magnesium oxide, 1-2 parts of manganese oxide, 4-7 parts of frit, 5-10 parts of brucite, and 1-2 parts of lanthanum oxide; specifically, the chemical composition of the frit by mass percentage is as follows: SiO2: 56.86%, Al2O3: 14.36%, Na2O: 7.56%, ZnO: 8.72%, MgO: 6.98%, TiO2: 1.27%, and K2O: 4.25%.

[0035] The preparation method thereof comprises the following steps:

[0036] Step 1: weighing and mixing the raw materials of the blank and Langyao red glaze according to the raw material formula, crushing, mixing, and wet ball milling the raw materials to prepare blank slurry and Langyao red glaze slurry;

[0037] Step 2: Using the green slurry obtained in step 1 to make a ceramic green body, after the ceramic green body is dried, it is put into a kiln and fired at 860-890° C. for 7-9 hours to obtain a ceramic green body;

[0038] Step 3: Apply the Langyao red glaze slurry prepared in step 1 to the surface of the ceramic blank, and then put it into the kiln. The kiln is cooled at 180°C and then naturally cooled to room temperature to dry the Langyao red glaze slurry.

[0039] Step 4: Place the dried glaze slurry into a kiln and fire it in a reducing atmosphere at a temperature of 1300-1320°C. The firing process is controlled as follows:

[0040] Low temperature stage: the temperature in the kiln rises from room temperature to 720-750℃, and the firing time is 1-2 hours;

[0041] Decomposition and oxidation stage: the temperature in the kiln is raised to 1050-1080℃, and the kiln firing time is 4-6 hours;

[0042] High-temperature reduction stage: the temperature in the kiln rises to 1280-1300℃, and the kiln firing time is 6-8h;

[0043] High-fire insulation stage: the temperature in the kiln is controlled at 1300-1320℃, and the kiln firing time is 4-6 hours;

[0044] Natural cooling stage: The kiln is cooled to room temperature, and the cooling time is extended to more than 12 hours.

[0045] Among them, in step 1, when the green slurry is wet ball milled, the raw materials are wet ground in the ball mill for 24-28 hours, the grinding medium is water, and the raw material: ball: water = 1:1.3-1.5:1-1.5; when the Langyao red glaze slurry is wet ball milled, the raw materials are wet ground in the ball mill for 32-36 hours, the grinding medium is water, and the raw material: ball: water = 1:1.8-2:1.5-2.

[0046] In step 4, in the decomposition and oxidation stage, the volume concentration of carbon monoxide is 1.2-1.5%, and the volume concentration of oxygen is 4.5-4.8%; in the high-temperature reduction stage, the volume concentration of carbon monoxide is 5.8-6.3%, and the volume concentration of oxygen is 1.8-2.3%; in the high-fire insulation stage, the volume concentration of carbon monoxide is 7.6-8.0%, and the volume concentration of oxygen is 1.0-1.2%.

[0047] Example 1

[0048] A crackle Langyao red-glazed porcelain comprises a blank and a Langyao red glaze material attached to the blank. Specifically, the thickness of the Langyao red glaze slurry is 0.4 mm.

[0049] The green body is composed of the following raw materials in parts by weight: 15 parts of potassium feldspar, 22 parts of Dehua kaolin, 30 parts of Dehua quartz, 10 parts of pyrophyllite, 4 parts of zinc oxide, 5 parts of bentonite, 6 parts of sericite and 5 parts of magnesite.

[0050] The Langyao red glaze is composed of the following raw materials in parts by weight: 20 parts of Dehua quartz, 25 parts of kaolin, 8 parts of cuprite, 5 parts of magnesium oxide, 1 part of manganese oxide, 7 parts of frit, 5 parts of brucite, and 2 parts of lanthanum oxide; specifically, the mass percentage chemical composition of the frit is as follows: SiO2: 56.86%, Al2O3: 14.36%, Na2O: 7.56%, ZnO: 8.72%, MogO: 6.98%, TiO2: 1.27%, and K2O: 4.25%.

[0051] The preparation method thereof comprises the following steps:

[0052] Step 1: weighing and mixing the raw materials of the blank and Langyao red glaze according to the raw material formula, crushing, mixing, and wet ball milling the raw materials to prepare blank slurry and Langyao red glaze slurry;

[0053] Step 2: Using the green slurry obtained in step 1 to make a ceramic green body, after the ceramic green body is dried, it is put into a kiln and fired at 860° C. for 9 hours to obtain a ceramic green body;

[0054] Step 3: Apply the Langyao red glaze slurry prepared in step 1 to the surface of the ceramic blank, and then put it into the kiln. The kiln is cooled at 180°C and then naturally cooled to room temperature to dry the Langyao red glaze slurry.

[0055] Step 4: Place the dried glaze slurry into a kiln and fire it in a reducing atmosphere at a temperature of 1300°C. The firing process is controlled as follows:

[0056] Low temperature stage: the temperature in the kiln rises from room temperature to 720℃, and the firing time is 2 hours;

[0057] Decomposition and oxidation stage: the temperature in the kiln is raised to 1050°C and the firing time is 6 hours;

[0058] High-temperature reduction stage: the temperature in the kiln is raised to 1280°C and the firing time is 8 hours;

[0059] High-fire insulation stage: the temperature in the kiln is controlled at 1300℃ and the firing time is 6 hours;

[0060] Natural cooling stage: The kiln is cooled to room temperature, and the cooling time is extended to more than 12 hours.

[0061] Among them, in step 1, when the green slurry is wet ball milled, the raw materials are wet ground in the ball mill for 24 hours, the grinding medium is water, and the raw material: ball: water = 1:1.5:1; when the Langyao red glaze slurry is wet ball milled, the raw materials are wet ground in the ball mill for 32 hours, the grinding medium is water, and the raw material: ball: water = 1:1.8:1.5.

[0062] In step 4, in the decomposition and oxidation stage, the volume concentration of carbon monoxide is 1.2%, and the volume concentration of oxygen is 4.5%; in the high-temperature reduction stage, the volume concentration of carbon monoxide is 5.8%, and the volume concentration of oxygen is 1.8%; in the high-fire insulation stage, the volume concentration of carbon monoxide is 7.6%, and the volume concentration of oxygen is 1.0%.

[0063] Example 2

[0064] A crackle Langyao red-glazed porcelain comprises a blank and a Langyao red glaze material attached to the blank. Specifically, the thickness of the Langyao red glaze slurry is 0.6 mm.

[0065] The green body is composed of the following raw materials in parts by weight: 18 parts of potassium feldspar, 18 parts of Dehua kaolin, 35 parts of Dehua quartz, 5 parts of pyrophyllite, 6 parts of zinc oxide, 3 parts of bentonite, 8 parts of sericite and 3 parts of magnesite.

[0066] Langyao red glaze is composed of the following raw materials in parts by weight: 30 parts of Dehua quartz, 18 parts of kaolin, 12 parts of cuprite, 3 parts of magnesium oxide, 2 parts of manganese oxide, 4 parts of frit, 10 parts of brucite, and 1 part of lanthanum oxide; specifically, the mass percentage chemical composition of the frit is as follows: SiO2: 56.86%, Al2O3: 14.36%, Na2O: 7.56%, ZnO: 8.72%, MgO: 6.98%, TiO2: 1.27%, K2O: 4.25%.

[0067] The preparation method thereof comprises the following steps:

[0068] Step 1: weighing and mixing the raw materials of the blank and Langyao red glaze according to the raw material formula, crushing, mixing, and wet ball milling the raw materials to prepare blank slurry and Langyao red glaze slurry;

[0069] Step 2: Using the green slurry obtained in step 1 to make a ceramic green body, after the ceramic green body is dried, it is put into a kiln and fired at 890° C. for 7 hours to obtain a ceramic green body;

[0070] Step 3: Apply the Langyao red glaze slurry prepared in step 1 to the surface of the ceramic blank, and then put it into the kiln. The kiln is cooled at 180°C and then naturally cooled to room temperature to dry the Langyao red glaze slurry.

[0071] Step 4: Place the dried glaze slurry into a kiln and fire it in a reducing atmosphere at a temperature of 1320°C. The firing process is controlled as follows:

[0072] Low temperature stage: the temperature in the kiln rises from room temperature to 750℃, and the firing time is 1 hour;

[0073] Decomposition and oxidation stage: the temperature in the kiln is raised to 1080°C and the firing time is 4 hours;

[0074] High-temperature reduction stage: the temperature in the kiln is raised to 1300°C and the firing time is 6 hours;

[0075] High-fire insulation stage: the temperature in the kiln is controlled at 1320℃, and the kiln firing time is 4 hours;

[0076] Natural cooling stage: The kiln is cooled to room temperature, and the cooling time is extended to more than 12 hours.

[0077] Among them, in step 1, when the green slurry is wet ball milled, the raw materials are wet ground in the ball mill for 28 hours, the grinding medium is water, and the raw material: ball: water = 1:1.3:1.5; when the Langyao red glaze slurry is wet ball milled, the raw materials are wet ground in the ball mill for 36 hours, the grinding medium is water, and the raw material: ball: water = 1:2:2.

[0078] In step 4, in the decomposition and oxidation stage, the volume concentration of carbon monoxide is 1.5%, and the volume concentration of oxygen is 4.8%; in the high-temperature reduction stage, the volume concentration of carbon monoxide is 6.3%, and the volume concentration of oxygen is 2.3%; in the high-fire insulation stage, the volume concentration of carbon monoxide is 8.0%, and the volume concentration of oxygen is 1.2%.

[0079] Example 3

[0080] A crackle Langyao red-glazed porcelain comprises a blank and a Langyao red glaze material attached to the blank. Specifically, the thickness of the Langyao red glaze slurry is 0.5 mm.

[0081] The green body is composed of the following raw materials in parts by weight: 16 parts of potassium feldspar, 20 parts of Dehua kaolin, 32 parts of Dehua quartz, 8 parts of pyrophyllite, 5 parts of zinc oxide, 4 parts of bentonite, 7 parts of sericite and 4 parts of magnesite.

[0082] Langyao red glaze is composed of the following raw materials in parts by weight: 25 parts of Dehua quartz, 21 parts of kaolin, 10 parts of cuprite, 4 parts of magnesium oxide, 1.5 parts of manganese oxide, 6 parts of frit, 8 parts of brucite, and 1.5 parts of lanthanum oxide; specifically, the mass percentage chemical composition of the frit is as follows: SiO2: 56.86%, Al2O3: 14.36%, Na2O: 7.56%, ZnO: 8.72%, MgO: 6.98%, TiO2: 1.27%, K2O: 4.25%.

[0083] The preparation method thereof comprises the following steps:

[0084] Step 1: weighing and mixing the raw materials of the blank and Langyao red glaze according to the raw material formula, crushing, mixing, and wet ball milling the raw materials to prepare blank slurry and Langyao red glaze slurry;

[0085] Step 2: Using the green slurry obtained in step 1 to make a ceramic green body, after the ceramic green body is dried, it is put into a kiln and fired at 875° C. for 8 hours to obtain a ceramic green body;

[0086] Step 3: Apply the Langyao red glaze slurry prepared in step 1 to the surface of the ceramic blank, and then put it into the kiln. The kiln is cooled at 180°C and then naturally cooled to room temperature to dry the Langyao red glaze slurry.

[0087] Step 4: Place the dried glaze slurry into a kiln and fire it in a reducing atmosphere at a temperature of 1310°C. The firing process is controlled as follows:

[0088] Low temperature stage: the temperature in the kiln rises from room temperature to 735℃, and the firing time is 1.5 hours;

[0089] Decomposition and oxidation stage: the temperature in the kiln is raised to 1065°C and the firing time is 5 hours;

[0090] High-temperature reduction stage: the temperature in the kiln is raised to 1290°C and the firing time is 7 hours;

[0091] High-fire insulation stage: the temperature in the kiln is controlled at 1310℃, and the kiln firing time is 5 hours;

[0092] Natural cooling stage: The kiln is cooled to room temperature, and the cooling time is extended to more than 12 hours.

[0093] Among them, in step 1, when the green slurry is wet ball milled, the raw materials are wet ground in the ball mill for 26 hours, the grinding medium is water, and the raw material: ball: water = 1:1.4:1.3; when the Langyao red glaze slurry is wet ball milled, the raw materials are wet ground in the ball mill for 34 hours, the grinding medium is water, and the raw material: ball: water = 1:1.9:1.8.

[0094] In step 4, in the decomposition and oxidation stage, the volume concentration of carbon monoxide is 1.3%, and the volume concentration of oxygen is 4.6%; in the high-temperature reduction stage, the volume concentration of carbon monoxide is 6.1%, and the volume concentration of oxygen is 2.1%; in the high-fire insulation stage, the volume concentration of carbon monoxide is 7.8%, and the volume concentration of oxygen is 1.1%.

[0095] The present application defines the raw material composition of the Langyao red glaze and combines it with a specific firing process to make the prepared Langyao red glaze porcelain have a bright glaze surface with fine cracks distributed on the surface, and the upper half of the glaze porcelain is light red and the lower half is bright red, which has a unique artistic effect and can meet the market demand for Langyao red glaze porcelain. Among them, the raw materials used in the Langyao red glaze are all ordinary raw materials, but through reasonable raw material composition and adjustment of the proportions, the raw materials also have a synergistic effect with each other. By introducing frit, brucite and lanthanum oxide and limiting the composition of the frit, the prepared glaze surface is made bright and uniform in color. At the same time, the cuprite, magnesium oxide and manganese oxide as color developers are evenly distributed to prevent defects such as mottled color and spots on the glaze surface, so as to ensure a bright and uniform Langyao red glaze surface.

[0096] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the patent application and the contents of the specification should still fall within the scope of the patent of the present invention.

Claims

1. A red-glazed porcelain from the Langyao kiln, characterized by: Including the blank and the Langyao red glaze attached to the blank. The Langyao red glaze material is composed of the following raw materials in parts by weight: 20-30 parts of Dehua quartz, 18-25 parts of kaolin, 8-12 parts of cuprite, 3-5 parts of magnesium oxide, 1-2 parts of manganese oxide, 4-7 parts of frit, 5-10 parts of brucite, and 1-2 parts of lanthanum oxide; The chemical composition of the frit by mass percentage is as follows: SiO2: 56.86%, Al2O3: 14.36%, Na2O: 7.56%, ZnO: 8.72%, MgO: 6.98%, TiO2: 1.27%, K2O: 4.25%; The preparation method thereof comprises the following steps: Step 1: weighing and mixing the raw materials of the blank and Langyao red glaze according to the raw material formula, crushing, mixing, and wet ball milling the raw materials to prepare blank slurry and Langyao red glaze slurry; Step 2: Using the green slurry obtained in step 1 to make a ceramic green body, after the ceramic green body is dried, it is put into a kiln and fired at 860-890° C. for 7-9 hours to obtain a green body; Step 3: Apply the Langyao red glaze slurry prepared in step 1 on the surface of the blank, and then put it into the kiln. The kiln is cooled at 180°C and then naturally cooled to room temperature to dry the Langyao red glaze slurry. Step 4: Place the dried glaze slurry into a kiln and fire it in a reducing atmosphere at a temperature of 1300-1320°C. The firing process is controlled as follows: Low temperature stage: the temperature in the kiln rises from room temperature to 720-750℃, and the firing time is 1-2 hours; Decomposition and oxidation stage: the temperature in the kiln is raised to 1050-1080℃, and the kiln firing time is 4-6 hours; High-temperature reduction stage: the temperature in the kiln rises to 1280-1300℃, and the kiln firing time is 6-8h; High-fire insulation stage: the temperature in the kiln is controlled at 1300-1320℃, and the kiln firing time is 4-6 hours; Natural cooling stage: The kiln is cooled to room temperature, and the cooling time is extended to more than 12 hours.

2. The red-glazed porcelain of Langyao Kiln with crackle leaves according to claim 1, characterized in that: The green blank is composed of the following raw materials in parts by weight: 15-18 parts of potassium feldspar, 18-22 parts of Dehua kaolin, 30-35 parts of Dehua quartz, 5-10 parts of pyrophyllite, 4-6 parts of zinc oxide, 3-5 parts of bentonite, 6-8 parts of sericite, and 3-5 parts of magnesite.

3. The red-glazed porcelain of Langyao Kiln with crackle leaves according to claim 1, characterized in that: In the high-temperature reduction stage, the volume concentration of carbon monoxide is 5.8-6.3%, and the volume concentration of oxygen is 1.8-2.3%.

4. The red-glazed porcelain of Langyao Kiln with crackle leaves according to claim 1, characterized in that: During the high-fire heat preservation stage, the volume concentration of carbon monoxide is 7.6-8.0%, and the volume concentration of oxygen is 1.0-1.2%.

5. The red-glazed porcelain of Langyao Kiln with crackle leaves according to claim 1, characterized in that: In the decomposition and oxidation stage, the volume concentration of carbon monoxide is 1.2-1.5%, and the volume concentration of oxygen is 4.5-4.8%.

6. The red-glazed porcelain from the Langyao kiln with crackle leaves according to claim 1, characterized in that: In the step 1, when the Langyao red glaze slurry is wet-milled, the raw materials are wet-milled in a ball mill for 32-36 hours, the grinding medium is water, and the ratio of raw materials: balls: water is 1:1.8-2:1.5-2.

7. The red-glazed porcelain from Langyao kiln with crackle leaves according to claim 1, characterized in that: In the step 1, when the green slurry is wet ball milled, the raw material is wet ground in a ball mill for 24-28 hours, the grinding medium is water, and the raw material: ball: water = 1:1.3-1.5:1-1.

5.

8. The red-glazed porcelain from the Langyao kiln with crackle leaves according to claim 1, characterized in that: The thickness of the Langyao red glaze slurry is 0.4-0.6 mm.