Preparation process of Zigong Jianzhan cup

Abstract

The preparation process comprises the following steps: preparing a green body and glaze slip, glazing, putting the glazed green body into an electric kiln for roasting, and cooling until the green body is taken out of the kiln after roasting. According to the rainbow Jianlian cup obtained through firing, the mouth edge is golden, the glaze surface is provided with oil drop stripes, oil drops are golden, purple golden, cyan blue and blue pink from top to bottom, the color is rich, the gradation is clear, the glaze surface is smooth, shiny, graceful and novel, and therefore the artistic and collection value of the Jianlian cup is improved.

Description

Technical Field

[0001] The invention relates to the technical field of porcelain, in particular to a preparation process of Honglin Jianzhan. Background Art

[0002] Jianzhan, named after Jian'an County of Jianzhou Prefecture in the Song Dynasty, flourished in the late Northern Song Dynasty and the early and middle Southern Song Dynasty, and was the imperial tea set of the Song Dynasty. Later, due to historical reasons, the production of Jianzhan was interrupted for hundreds of years and resumed in the 1980s.

[0003] The methods for preparing Jianzhan reported so far have the following limitations: First, the selection of formula and the control of process steps are unclear, the body of Jianzhan is prone to cracking and deformation, the glaze is prone to glaze flow and sticking to the bottom, bubbling, many pinholes, etc., and the yield rate is low; second, the glaze of Jianzhan is ordinary and less innovative. The above factors limit the appearance of Jianzhan and reduce its artistic and collection value. Summary of the invention

[0004] The purpose of the present invention is to provide a preparation process of Honglin Jianzhan, which has a beautiful and novel glaze surface, thereby improving the artistic and collection value of Jianzhan.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The preparation process of Honglin Jianzhan includes the following steps:

[0007] (1) preparing a green body and a glaze slurry, wherein:

[0008] The green body is prepared by the following method: 1.8-2.1 parts by weight of laterite and 7.5-8.5 parts by weight of kaolin are mixed, crushed, washed with water, passed through an 80-90 mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is formed by wheel throwing, trimmed, biscuit calcined at 850-870° C. for 5.5-6.5 hours, and taken out to obtain the green body;

[0009] The glaze slurry is prepared by the following method: 11.8-12.2 parts by weight of glaze stone, 7.9-8.1 parts by weight of potassium feldspar, 3.8-4.2 parts by weight of limestone, 4.8-5.2 parts by weight of talc, 3.4-3.6 parts by weight of iron oxide and 34-36 parts by weight of water are ground and passed through a 90-100 mesh sieve to obtain a glaze slurry;

[0010] (2) Glazing: pour the glaze slurry into the body, leave it for 5-6 seconds, and the glaze thickness is 0.7-0.8 mm; then turn the body upside down and immerse it in the glaze slurry for 2-3 seconds, and the glaze thickness is 0.4-0.5 mm. The bottom of the body is not glazed and is air-dried;

[0011] (3) Firing: The glazed body is placed in an electric kiln for firing, and the firing comprises the following steps:

[0012] (3.1): The kiln temperature rises uniformly from room temperature to 980-1020℃ over 4.5h;

[0013] (3.2): The kiln temperature rises uniformly from 980-1020℃ to 1298-1302℃ over 3h;

[0014] (3.3): After keeping at 1298-1302℃ for 1.4-1.6h, continue to keep the temperature and add the first fuel oil into the kiln, and then add fuel oil at intervals of 2min, 3min, 4min, 5min, and 6min each time, for a total of 6 times. The amount of fuel oil added each time is 695-705g per cubic meter of kiln space. After the last addition of fuel oil, the kiln is powered off and stopped;

[0015] (3.4): When the kiln temperature drops to 1148-1152℃, open the kiln door to half-open state; when the kiln temperature drops to 1079-1081℃, close the kiln door; when the kiln temperature drops to 1074-1075℃, add fuel oil into the kiln, once every 3 minutes, for a total of 2 times, the amount of fuel oil added each time is 173-176g per cubic meter of kiln space, open the kiln door to half-open state after the last addition of fuel oil, and close the kiln door after 3 minutes; after 1.5 hours, the kiln temperature rises, and after 45 minutes, the temperature rises uniformly to 1028-1032℃, the kiln is powered off and stopped, the kiln door is opened with a gap of 18-22cm, and the temperature is cooled down before it is discharged from the kiln.

[0016] Preferably, the preparation process of Honglin Jianzhan comprises the following steps:

[0017] (1) preparing a green body and a glaze slurry, wherein:

[0018] The green body is prepared by the following method: 2 parts by weight of red clay and 8 parts by weight of kaolin are mixed, crushed, washed with water, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is formed by wheel throwing, trimmed, biscuit fired at 850° C. for 6 hours, and taken out to obtain the green body;

[0019] The glaze slurry is prepared by the following method: 12 parts by weight of glaze stone, 8 parts by weight of potassium feldspar, 4 parts by weight of limestone, 5 parts by weight of talc, 3.5 parts by weight of iron oxide and 35 parts by weight of water are ground and passed through a 100-mesh sieve to obtain a glaze slurry;

[0020] (2) Glazing: pour the glaze slurry into the body, leave it for 5-6 seconds, and the glaze thickness is 0.7-0.8 mm; then turn the body upside down and immerse it in the glaze slurry for 2-3 seconds, and the glaze thickness is 0.4-0.5 mm. The bottom of the body is not glazed and is air-dried;

[0021] (3) Firing: The glazed body is placed in an electric kiln for firing, and the firing comprises the following steps:

[0022] (3.1): The kiln temperature is raised uniformly from room temperature to 1000℃ over 4.5h;

[0023] (3.2): The kiln temperature is raised uniformly from 1000℃ to 1300℃ over 3h;

[0024] (3.3): After keeping at 1300℃ for 1.5h, keep keeping the temperature and add the first fuel oil into the kiln. Then add fuel oil at intervals of 2min, 3min, 4min, 5min and 6min respectively. Add 6 times in total. The amount of fuel oil added each time is 700g per cubic meter of kiln space. After the last addition of fuel oil, the kiln is powered off and stopped.

[0025] (3.4): When the kiln temperature drops to 1150℃, open the kiln door to half-open state; when the kiln temperature drops to 1080℃, close the kiln door; when the kiln temperature drops to 1075℃, throw fuel wood into the kiln, once every 3 minutes, for a total of 2 times, the amount of fuel wood thrown in each time is 175g per cubic meter of kiln space, open the kiln door to half-open state after the last throwing of fuel wood, and close the kiln door after 3 minutes; after 1.5 hours, the kiln temperature rises, and after 45 minutes, the temperature rises uniformly to 1030℃, the kiln is powered off and stopped, the kiln door is opened 20cm and cooled down before being taken out of the kiln.

[0026] Furthermore, the laterite and kaolin are both taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province; the glaze stone is taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

[0027] After adopting the above technical solution, the present invention has the following advantages:

[0028] 1. The Honglin Jian teapot fired by the present invention has a golden rim and a glaze with oil drop patterns. The oil drops are golden, purple-gold, blue-blue, and blue-pink from top to bottom. The colors are rich and the layers are distinct. The glaze is smooth and shining, beautiful and novel, thereby improving the artistic and collection value of the Jian teapot.

[0029] 2. The process flow of the present invention is clear, easy to control, has few defects and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a photo illustration of a Jian ware prepared in Example 1 of the present invention;

[0031] Figure 2 This is a photo illustration of the Jian ware prepared in Example 1 of the present invention (from another angle). DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] In the present invention, unless otherwise specified, all parts and percentages are by weight, and all equipment and raw materials can be purchased from the market or are commonly used in the industry. The methods in the following embodiments are conventional methods in the art unless otherwise specified.

[0034] Example 1

[0035] The following steps are involved:

[0036] (1) preparing a green body and a glaze slurry, wherein:

[0037] The green body is prepared by the following method: 2 parts by weight of red clay and 8 parts by weight of kaolin are mixed, crushed, washed with water, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is formed by wheel throwing, trimmed, biscuit fired at 850° C. for 6 hours, and taken out to obtain the green body;

[0038] The glaze slurry is prepared by the following method: 12 parts by weight of glaze stone, 8 parts by weight of potassium feldspar, 4 parts by weight of limestone, 5 parts by weight of talc, 3.5 parts by weight of iron oxide and 35 parts by weight of water are ground and passed through a 100-mesh sieve to obtain a glaze slurry;

[0039] (2) Glazing: pour the glaze slurry into the body, leave it for 5-6 seconds, and the glaze thickness is 0.7-0.8 mm; then turn the body upside down and immerse it in the glaze slurry for 2-3 seconds, and the glaze thickness is 0.4-0.5 mm. The bottom of the body is not glazed and is air-dried;

[0040] (3) Firing: The glazed body is placed in an electric kiln for firing, and the firing comprises the following steps:

[0041] (3.1): The kiln temperature is raised uniformly from room temperature to 1000℃ over 4.5h;

[0042] (3.2): The kiln temperature is raised uniformly from 1000℃ to 1300℃ over 3h;

[0043] (3.3): After keeping at 1300℃ for 1.5h, keep keeping the temperature and add the first fuel oil into the kiln. Then add fuel oil at intervals of 2min, 3min, 4min, 5min and 6min respectively. Add 6 times in total. The amount of fuel oil added each time is 700g per cubic meter of kiln space. After the last addition of fuel oil, the kiln is powered off and stopped.

[0044] (3.4): When the kiln temperature drops to 1150℃, open the kiln door to half-open state; when the kiln temperature drops to 1080℃, close the kiln door; when the kiln temperature drops to 1075℃, throw fuel wood into the kiln, once every 3 minutes, for a total of 2 times, the amount of fuel wood thrown in each time is 175g per cubic meter of kiln space, open the kiln door to half-open state after the last throwing of fuel wood, and close the kiln door after 3 minutes; after 1.5 hours, the kiln temperature rises, and after 45 minutes, the temperature rises uniformly to 1030℃, the kiln is powered off and stopped, the kiln door is opened 20cm and cooled down before being taken out of the kiln.

[0045] Furthermore, the laterite and kaolin are both taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province; the glaze stone is taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

[0046] The internal space size of the kiln in this embodiment is 0.20 cubic meters (1.08 meters long, 0.42 meters wide, and 0.45 meters high), and the kiln door area is 1.2 square meters (1.5 meters long and 0.8 meters high).

[0047] refer to Figure 1 and Figure 2 The Honglin Jian tea bowl fired in this embodiment has a golden rim and an oil drop pattern on the glaze. The oil droplets are golden, purple-gold, cyan-blue, and blue-pink from top to bottom. The colors are rich and the layers are distinct. The glaze is smooth and shining, beautiful and novel, thereby improving the artistic and collection value of the Jian tea bowl.

[0048] Jianzhan is very sensitive to the preparation process parameters. Even a small change in the process parameters will have a significant adverse effect on the appearance and other characteristics of the final Jianzhan product, as follows:

[0049] Comparative Example 1

[0050] The preparation process of Jianzhan in this comparative example is the same as that in Example 1, except that:

[0051] (3.3): After keeping at 1300℃ for 1.5h, continue to keep the temperature and add the first fuel oil into the kiln. Add once every 4 minutes for a total of 6 times. The amount of fuel oil added each time is 700g per cubic meter of kiln space. After the last addition of fuel oil, the kiln is powered off and stopped.

[0052] The oil droplets of the Jian ware prepared in this comparative example are purple-gold in color without multi-layered colors.

[0053] Comparative Example 2

[0054] The difference between this comparative example and Example 1 is that:

[0055] (3.4): When the kiln temperature drops to 1150℃, open the kiln door to half-open state; when the kiln temperature drops to 1080℃, close the kiln door; when the kiln temperature drops to 1075℃, throw oil firewood into the kiln, once every 3 minutes, for a total of 2 times, and the amount of oil firewood put in each time is 175g per cubic meter of kiln space; after 1.5h, the kiln temperature is raised, and after 45min, the temperature is raised to 1030℃ at a uniform speed, the kiln is powered off and stopped, the kiln door is opened 20cm, and the temperature is lowered to cool down before it is out of the kiln.

[0056] The Jian ware obtained in this comparative example has a golden oil drop on the upper part and a purple gold oil drop on the lower part, without multi-layered colors.

[0057] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. The preparation process of Honglin Jianzhan is characterized by: The following steps are involved: (1) preparing a green body and a glaze slurry, wherein: The green body is prepared by the following method: 1.8-2.1 parts by weight of laterite and 7.5-8.5 parts by weight of kaolin are mixed, crushed, washed with water, passed through an 80-90 mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is formed by wheel throwing, trimmed, biscuit calcined at 850-870° C. for 5.5-6.5 hours, and taken out to obtain the green body; The glaze slurry is prepared by the following method: 11.8-12.2 parts by weight of glaze stone, 7.9-8.1 parts by weight of potassium feldspar, 3.8-4.2 parts by weight of limestone, 4.8-5.2 parts by weight of talc, 3.4-3.6 parts by weight of iron oxide and 34-36 parts by weight of water are ground and passed through a 90-100 mesh sieve to obtain a glaze slurry; (2) Glazing: pour the glaze slurry into the body, leave it for 5-6 seconds, and the glaze thickness is 0.7-0.8 mm; then turn the body upside down and immerse it in the glaze slurry for 2-3 seconds, and the glaze thickness is 0.4-0.5 mm. The bottom of the body is not glazed and is air-dried; (3) Firing: The glazed body is placed in an electric kiln for firing, and the firing comprises the following steps: (3.1): The kiln temperature rises uniformly from room temperature to 980-1020℃ over 4.5h; (3.2): The kiln temperature rises uniformly from 980-1020℃ to 1298-1302℃ over 3h; (3.3): After keeping at 1298-1302℃ for 1.4-1.6h, continue to keep the temperature and add the first fuel oil into the kiln, and then add fuel oil at intervals of 2min, 3min, 4min, 5min, and 6min each time, for a total of 6 times. The amount of fuel oil added each time is 695-705g per cubic meter of kiln space. After the last addition of fuel oil, the kiln is powered off and stopped; (3.4): When the kiln temperature drops to 1148-1152℃, open the kiln door to half-open state; when the kiln temperature drops to 1079-1081℃, close the kiln door; when the kiln temperature drops to 1074-1075℃, add fuel oil into the kiln, once every 3 minutes, for a total of 2 times, the amount of fuel oil added each time is 173-176g per cubic meter of kiln space, open the kiln door to half-open state after the last addition of fuel oil, and close the kiln door after 3 minutes; after 1.5 hours, the kiln temperature rises, and after 45 minutes, the temperature rises uniformly to 1028-1032℃, the kiln is powered off and stopped, the kiln door is opened with a gap of 18-22cm, and the temperature is cooled down before it is discharged from the kiln.

2. The preparation process of Honglin Jianzhan according to claim 1, characterized in that: The following steps are involved: (1) preparing a green body and a glaze slurry, wherein: The green body is prepared by the following method: 2 parts by weight of red clay and 8 parts by weight of kaolin are mixed, crushed, washed with water, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is formed by wheel throwing, trimmed, biscuit fired at 850° C. for 6 hours, and taken out to obtain the green body; The glaze slurry is prepared by the following method: 12 parts by weight of glaze stone, 8 parts by weight of potassium feldspar, 4 parts by weight of limestone, 5 parts by weight of talc, 3.5 parts by weight of iron oxide and 35 parts by weight of water are ground and passed through a 100-mesh sieve to obtain a glaze slurry; (2) Glazing: pour the glaze slurry into the body, leave it for 5-6 seconds, and the glaze thickness is 0.7-0.8 mm; then turn the body upside down and immerse it in the glaze slurry for 2-3 seconds, and the glaze thickness is 0.4-0.5 mm. The bottom of the body is not glazed and is air-dried; (3) Firing: The glazed body is placed in an electric kiln for firing, and the firing comprises the following steps: (3.1): The kiln temperature is raised uniformly from room temperature to 1000℃ over 4.5h; (3.2): The kiln temperature is raised uniformly from 1000℃ to 1300℃ over 3h; (3.3): After keeping at 1300℃ for 1.5h, keep keeping the temperature and add the first fuel oil into the kiln. Then add fuel oil at intervals of 2min, 3min, 4min, 5min and 6min respectively. Add 6 times in total. The amount of fuel oil added each time is 700g per cubic meter of kiln space. After the last addition of fuel oil, the kiln is powered off and stopped. (3.4): When the kiln temperature drops to 1150℃, open the kiln door to half-open state; when the kiln temperature drops to 1080℃, close the kiln door; when the kiln temperature drops to 1075℃, throw fuel wood into the kiln, once every 3 minutes, for a total of 2 times, the amount of fuel wood thrown in each time is 175g per cubic meter of kiln space, open the kiln door to half-open state after the last throwing of fuel wood, and close the kiln door after 3 minutes; after 1.5 hours, the kiln temperature rises, and after 45 minutes, the temperature rises uniformly to 1030℃, the kiln is powered off and stopped, the kiln door is opened 20cm and cooled down before being taken out of the kiln.

3. The preparation process of Honglin Jianzhan as claimed in claim 1 or 2, characterized in that: The red clay and kaolin were both taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province; the glaze stone was taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

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