Preparation technology of Jinjing Jianzhan

Abstract

The present invention discloses a preparation process for Jinjing Jianzhan teapots, comprising the following steps: preparing a body and a glaze slurry, applying the glaze slurry to the body, leaving the outer bottom of the body unglazed and air-drying; placing the glazed and air-dried body into an electric kiln for firing, and removing it from the kiln. The Jinjing Jianzhan teapots obtained by firing the present invention have tiny, star-shaped crystal spots dotted within a lacquer-like black glaze surface. The crystal spots are primarily golden in color, interspersed with red crystal spots, creating a dazzling scene like a sky full of stars. The crystal spots are located within the glaze and do not protrude from the surface, resulting in a smooth and lustrous glaze surface. The overall appearance is beautiful, innovative, and full of charm, with excellent artistic and collectible value.

Description

Technical Field

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

[0002] The currently reported methods for preparing Jianzhan have the following limitations: First, Jianzhan is difficult to fire and the firing process is difficult to master. Improper process selection often leads to many defects, such as bubbling, deformation, cracking of the body, glaze sticking to the bottom, plaques, a large number of pinholes on the glaze surface, low yield, etc., which reduces the artistic, collection and economic value of Jianzhan; Second, the glaze surface is generally rabbit hair, oil droplets or black gold, and is less innovative.

[0003] Therefore, this field needs to develop a Jianzhan preparation process with beautiful and novel appearance and stable quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation process of Jinjing Jianzhan, which has a beautiful and novel glaze, high artistic and collection value, and stable quality.

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

[0006] The preparation process of Jinjing 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: mixing 2.5-3.5 parts by weight of red clay and 6.5-7.5 parts by weight of kaolin to obtain green clay, crushing and washing the green clay, passing through a 90-100 mesh sieve, filtering, refining, and aging to obtain green clay; and throwing the green clay into shape, trimming, bisque firing, and cooling to obtain the green body.

[0009] The glaze slip is prepared by the following method: 7 parts by weight of glaze stone, 1.8-2.1 parts by weight of plant ash, 0.9-1.1 parts by weight of potassium feldspar and water are weighed, added into a ball mill and ground, and passed through a 110-120 mesh sieve to obtain a glaze slip, and the glaze slip concentration is adjusted to 43-47° Bé;

[0010] The red soil 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;

[0011] (2) Glazing: applying the glaze slurry on the green body to a thickness of 1-1.2 mm, leaving the outer bottom of the green body unglazed and air-drying;

[0012] (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process is as follows:

[0013] Phase 1: The kiln temperature is raised from room temperature to 480-520°C at a constant speed over 0.9-1.1 hours; the kiln temperature is raised from 480-520°C to 990-1100°C at a constant speed over 1.9-2.1 hours; the kiln temperature is raised from 990-1100°C to 1305-1315°C at a constant speed over 2.9-3.1 hours;

[0014] The second stage: keep the temperature at 1305-1315℃ for 0.9-1.1h, then add oil firewood at an interval of 3.8-4.1min for 4 times. The amount of oil firewood added each time is 28-32g per 0.2 cubic meter of kiln space.

[0015] Stage 3: After the last fuel oil is added, the power is turned off. When the kiln temperature drops to 1175-1185℃, open the kiln door 9-11cm apart. When the kiln temperature drops to 1095-1105℃, close the door.

[0016] The fourth stage: when the kiln temperature drops to 975-985℃, open the kiln door 4-6cm gap; when the kiln temperature drops to 815-825℃, close the door; when the kiln temperature drops to 300-320℃, open the kiln door 18-22cm gap; cool down to room temperature and take the kiln out.

[0017] Typically, the preparation process of the Jinjing Jianzhan comprises the following steps:

[0018] (1) preparing a green body and a glaze slurry, wherein:

[0019] The green body is prepared by the following method: mixing 3 parts by weight of red clay and 7 parts by weight of kaolin to obtain green clay, crushing and washing the green clay, passing through a 100-mesh sieve, filtering, refining, and aging to obtain green clay; throwing the green clay into shape, trimming, bisque firing, and cooling to obtain the green body;

[0020] The glaze slurry is prepared by the following method: 7 parts by weight of glaze stone, 2 parts by weight of plant ash, 1 part by weight of potassium feldspar and water are weighed, added into a ball mill and ground, and passed through a 120-mesh sieve to obtain a glaze slurry, and the glaze slurry concentration is adjusted to 45°Bé;

[0021] The red soil 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;

[0022] (2) Glazing: applying the glaze slurry on the green body to a thickness of 1-1.2 mm, leaving the outer bottom of the green body unglazed and air-drying;

[0023] (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process is as follows:

[0024] The first stage: the kiln temperature is raised from room temperature to 500°C at a constant speed over 1 hour; the kiln temperature is raised from 500°C to 1000°C at a constant speed over another 2 hours; the kiln temperature is raised from 1000°C to 1310°C at a constant speed over another 3 hours;

[0025] The second stage: keep the temperature at 1310℃ for 1 hour, then add oil firewood in the keeping state, once every 4 minutes, for a total of 4 times, and the amount of oil firewood added each time is 30g per 0.2 cubic meters of kiln space;

[0026] Phase 3: After the last fuel oil is added, the power is turned off. When the kiln temperature drops to 1180°C, the kiln door is opened 10cm apart. When the kiln temperature drops to 1100°C, the door is closed.

[0027] The fourth stage: when the kiln temperature drops to 980℃, open the kiln door 5cm gap; when the kiln temperature drops to 820℃, close the door; when the kiln temperature drops to 310℃, open the kiln door 20cm gap; cool down to room temperature and take out of the kiln.

[0028] Preferably, the wood ash is pine ash.

[0029] After adopting the above technical solution, the present invention has the following advantages:

[0030] 1. The golden crystal Jian ware obtained by firing the present invention has tiny crystal spots dotted in the black lacquer-like glaze surface. The color of the crystal spots is mainly golden, and is mixed with red crystal spots, which are as bright and dazzling as a sky full of stars. The crystal spots are located in the glaze and do not protrude from the surface. The glaze surface is smooth and moist. The overall appearance is beautiful, novel, and full of charm, with excellent artistic and collection value.

[0031] 2. The process flow of the present invention is clear, easy to control, has few defects and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a photo illustration of the Jianzhan prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to 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.

[0034] In the present invention, unless otherwise specified, all parts and percentages are by weight, and all equipment and raw materials are commercially available or commonly used in the industry. The methods in the following examples are all conventional methods in the art unless otherwise specified.

[0035] Example 1

[0036] The preparation process of the Jinjing Jianzhan comprises the following steps:

[0037] (1) preparing a green body and a glaze slurry, wherein:

[0038] The green body is prepared by the following method: mixing 3 parts by weight of red clay and 7 parts by weight of kaolin to obtain green clay, crushing and washing the green clay, passing through a 100-mesh sieve, filtering, refining, and aging to obtain green clay; throwing the green clay into shape, trimming, bisque firing, and cooling to obtain the green body;

[0039] The glaze slip is prepared by the following method: 7 parts by weight of glaze stone, 2 parts by weight of plant ash, 1 part by weight of potassium feldspar and water are weighed, added into a ball mill and ground, and passed through a 120-mesh sieve to obtain a glaze slip, and the glaze slip concentration is adjusted to 45°Bé;

[0040] The red soil 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;

[0041] The plant ash is pine ash.

[0042] (2) Glazing: applying the glaze slurry on the green body to a thickness of 1-1.2 mm, leaving the outer bottom of the green body unglazed and air-drying;

[0043] (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process is as follows:

[0044] The first stage: the kiln temperature is raised from room temperature to 500°C at a constant speed over 1 hour; the kiln temperature is raised from 500°C to 1000°C at a constant speed over another 2 hours; the kiln temperature is raised from 1000°C to 1310°C at a constant speed over another 3 hours;

[0045] The second stage: keep the temperature at 1310℃ for 1 hour, then add oil firewood in the keeping state, once every 4 minutes, for a total of 4 times, and the amount of oil firewood added each time is 30g per 0.2 cubic meters of kiln space;

[0046] Phase 3: After the last fuel oil is added, the power is turned off. When the kiln temperature drops to 1180°C, the kiln door is opened 10cm apart. When the kiln temperature drops to 1100°C, the door is closed.

[0047] The fourth stage: when the kiln temperature drops to 980℃, open the kiln door 5cm gap; when the kiln temperature drops to 820℃, close the door; when the kiln temperature drops to 310℃, open the kiln door 20cm gap; cool down to room temperature and take out of the kiln.

[0048] The kiln used in this embodiment has an internal space of 0.2 cubic meters (the internal length of the kiln is 0.5 meters, the width is 0.45 meters, and the height is 0.89 meters), and the kiln door area is 0.77 square meters (the kiln door is 0.7 meters long and 1.1 meters high).

[0049] The fuel wood of the present invention can burn vigorously at high temperatures. The fuel wood is fed through a fuel wood feeding port on the kiln door. The port is open only when fuel wood is fed and is closed at other times. The diameter of the port is 10-15 cm.

[0050] refer to Figure 1 The golden crystal Jian ware obtained by firing in this embodiment has tiny crystal spots dotted in the black lacquer-like glaze surface. The color of the crystal spots is mainly golden, and is interspersed with red crystal spots, which are as dazzling as a sky full of stars. The crystal spots are located in the glaze and do not protrude from the surface. The glaze surface is smooth and moist. The overall appearance is beautiful, novel, and full of charm, with excellent artistic and collection value.

[0051] Example 2 and Example 3

[0052] Jianzhan is very sensitive to the parameters of the production process. 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, and may even lead to the failure of the Jianzhan production. Therefore, Jianzhan has very demanding requirements for the production process. Examples 2 and 3 prepared Jinjing Jianzhan according to the same production process as Example 1. The properties of the Jinjing Jianzhan prepared in Examples 2 and 3 are the same as those prepared in Example 1. The results show that the Jinjing Jianzhan prepared by the production process of Example 1 has a high yield rate, and the method has good repeatability, strong stability, and is easy to scale production.

[0053] Comparative Example 1

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

[0055] The second stage: keep the temperature at 1310℃ for 1 hour, then add oil firewood in the keeping state, once every 4 minutes, for a total of 4 times, and the amount of oil firewood added each time is 50g per 0.2 cubic meters of kiln space;

[0056] The Jian ware obtained by firing in this comparative example has oil droplets on the glaze surface but no fine crystal spots.

[0057] Comparative Example 2

[0058] The difference between this comparative example and Example 1 is that:

[0059] Phase 3: Power off after the last fuel and diesel are added;

[0060] The Jian ware obtained in this comparative example has a completely black glaze (black gold) without any fine crystal spots.

[0061] Comparative Example 3

[0062] The difference between this comparative example and Example 1 is that:

[0063] Phase 3: After the last fuel oil is added, the power is turned off. When the kiln temperature drops to 1180°C, the kiln door is opened 20cm apart. When the kiln temperature drops to 1100°C, the door is closed.

[0064] The Jian ware obtained in this comparative example has fine crystal spots floating on the glaze surface, and the glaze surface is less glossy than that of Example 1.

[0065] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. The preparation process of Jinjing 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: mixing 2.5-3.5 parts by weight of red clay and 6.5-7.5 parts by weight of kaolin to obtain green clay, crushing and washing the green clay, passing through a 90-100 mesh sieve, filtering, refining, and aging to obtain green clay; and throwing the green clay into shape, trimming, bisque firing, and cooling to obtain the green body. The glaze slip is prepared by the following method: 7 parts by weight of glaze stone, 1.8-2.1 parts by weight of plant ash, 0.9-1.1 parts by weight of potassium feldspar and water are weighed, added into a ball mill and ground, and passed through a 110-120 mesh sieve to obtain a glaze slip, and the glaze slip concentration is adjusted to 43-47° Bé; The red soil 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; (2) Glazing: applying the glaze slurry on the green body to a thickness of 1-1.2 mm, leaving the outer bottom of the green body unglazed and air-drying; (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process is as follows: Phase 1: The kiln temperature is raised from room temperature to 480-520°C at a constant speed over 0.9-1.1 hours; the kiln temperature is raised from 480-520°C to 990-1100°C at a constant speed over 1.9-2.1 hours; the kiln temperature is raised from 990-1100°C to 1305-1315°C at a constant speed over 2.9-3.1 hours; The second stage: keep the temperature at 1305-1315℃ for 0.9-1.1h, then add oil firewood at an interval of 3.8-4.1min for 4 times. The amount of oil firewood added each time is 28-32g per 0.2 cubic meter of kiln space. Stage 3: After the last fuel oil is added, the power is turned off. When the kiln temperature drops to 1175-1185℃, open the kiln door 9-11cm apart. When the kiln temperature drops to 1095-1105℃, close the door. The fourth stage: when the kiln temperature drops to 975-985℃, open the kiln door 4-6cm gap; when the kiln temperature drops to 815-825℃, close the door; when the kiln temperature drops to 300-320℃, open the kiln door 18-22cm gap; cool down to room temperature and take the kiln out.

2. The preparation process of Jinjing 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: 3 parts by weight of red clay and 7 parts by weight of kaolin are mixed to obtain green clay, the green clay is crushed and washed, passed through a 100-mesh sieve, filtered, refined, and aged to obtain green clay; the green clay is thrown into shape, trimmed, bisque-fired, and cooled to obtain the green body; The glaze slurry is prepared by the following method: 7 parts by weight of glaze stone, 2 parts by weight of plant ash, 1 part by weight of potassium feldspar and water are weighed, added into a ball mill and ground, and passed through a 120-mesh sieve to obtain a glaze slurry, and the glaze slurry concentration is adjusted to 45°Bé; The red soil 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; (2) Glazing: applying the glaze slurry on the green body to a thickness of 1-1.2 mm, leaving the outer bottom of the green body unglazed and air-drying; (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process is as follows: The first stage: the kiln temperature is raised from room temperature to 500°C at a constant speed over 1 hour; the kiln temperature is raised from 500°C to 1000°C at a constant speed over another 2 hours; the kiln temperature is raised from 1000°C to 1310°C at a constant speed over another 3 hours; The second stage: keep the temperature at 1310℃ for 1 hour, then add oil firewood in the keeping state, once every 4 minutes, for a total of 4 times, and the amount of oil firewood added each time is 30g per 0.2 cubic meters of kiln space; Phase 3: After the last fuel oil is added, the power is turned off. When the kiln temperature drops to 1180°C, the kiln door is opened 10cm apart. When the kiln temperature drops to 1100°C, the door is closed. The fourth stage: when the kiln temperature drops to 980℃, open the kiln door 5cm gap; when the kiln temperature drops to 820℃, close the door; when the kiln temperature drops to 310℃, open the kiln door 20cm gap; cool down to room temperature and take out of the kiln.

3. The preparation process of the Jinjing Jianzhan according to claim 1 or 2, characterized in that: The plant ash is pine ash.

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