Preparation technology of blue partridge-spotted Jianzhan

Abstract

The invention discloses a preparation process of a blue partridge-spotted Jian tea bowl, comprising the following steps: preparing a body and a glaze slurry, applying glaze, and placing the glazed and air-dried body into an electric kiln for firing. The blue partridge-spotted Jian tea bowl fired by the invention has silver-blue band-like patterns distributed on a dark blue background, the band-like patterns are stacked and long, the band-like patterns are clear and hidden in the glaze, the glaze surface is smooth and moist, the mouth edge is golden, and it is beautiful and novel.

Description

Technical Field

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

[0002] Jianzhan is a typical representative of black-glazed porcelain and a mysterious and profound pearl in the ceramic world. 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, and the glaze surface is prone to defects such as glaze flow, sticking to the bottom, and bubbling; Second, the glaze surface of Jianzhan is ordinary and less innovative. Summary of the invention

[0003] The purpose of the present invention is to provide a preparation process of a blue partridge-spotted Jian teak, which has a beautiful and novel glaze surface and few defects.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The preparation process of blue partridge-spotted Jianzhan comprises the following steps:

[0006] (1) preparing a green body and a glaze slurry, wherein:

[0007] The green body is prepared by the following method: 2-2.5 parts by weight of red clay, 4-5 parts by weight of kaolin, and 0.2-0.3 parts by weight of glaze stone are mixed, crushed, washed, passed through an 80-100 mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is thrown into shape, trimmed, bisque fired, and cooled to obtain the green body;

[0008] The glaze slurry is prepared by the following method: 500 parts by weight of glaze stone, 50-55 parts by weight of plant ash, 20-23 parts by weight of limestone, 28-32 parts by weight of potassium feldspar and 600-610 parts by weight of water are weighed, added into a ball mill, and ground, and after grinding, passed through a 100-120 mesh sieve to obtain a glaze slurry;

[0009] 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;

[0010] (2) glazing: pouring the glaze slurry into the body, the glazing thickness is 0.7-0.8 mm; then turning the body upside down and immersing it in the glaze slurry, the glazing thickness is 0.5-0.6 mm, and the bottom of the body is not glazed and air-dried;

[0011] (3) The glazed and dried green body is placed in an electric kiln for firing. The firing process includes the following steps:

[0012] The first stage: the kiln temperature rises from room temperature to 1250℃ over 7-8h;

[0013] The second stage: keep the temperature at 1250℃ for 115-120min, add oil firewood for the first time when the temperature reaches 108-112min, and add 58-62g of oil firewood for every 0.2 cubic meter of kiln space. After the temperature is kept at 1250℃, the temperature is increased to 1260℃ for 4-6min, and kept at 1260℃ for 4-6min. When the temperature is kept at 2min, add oil firewood for the second time, and add 70g of oil firewood for every 0.2 cubic meter of kiln space. After the temperature is kept at 1250℃, the temperature is increased to 1270℃ for 9-11min, and kept at 1270℃ for 4-6min. When the temperature is kept at 2min, add oil firewood for the third time, and add 80g of oil firewood for every 0.2 cubic meter of kiln space.

[0014] The third stage: after the insulation is completed, the power is turned off. When the kiln temperature drops to 1190-1200℃, the furnace door is opened. When the kiln temperature drops to 1045-1055℃, the furnace door is closed. The kiln is powered on and kept at 1045-1055℃ for 28-32 minutes. When the temperature is kept at 15-16 minutes, oil firewood is added, once every 3 minutes, for a total of 3 times. The amount of oil firewood added each time is 48g per 0.2 cubic meter of kiln space.

[0015] The fourth stage: After the heat preservation is completed, the temperature drops naturally until it is ready for kiln discharge.

[0016] Preferably, the preparation process of the blue partridge-spotted 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: 2.2 parts by weight of red clay, 4.5 parts by weight of kaolin, and 0.25 parts by weight of glaze stone are mixed, crushed, washed, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is subjected to wheel throwing, trimming, biscuit firing, and cooling to obtain the green body;

[0019] The glaze slurry is prepared by the following method: 500 parts by weight of glaze stone, 53 parts by weight of plant ash, 22 parts by weight of limestone, 30 parts by weight of potassium feldspar and 605 parts by weight of water are weighed and added into a ball mill for grinding, and after grinding, the mixture is passed through a 120-mesh sieve to obtain a glaze slurry;

[0020] 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;

[0021] (2) glazing: pouring the glaze slurry into the body, the glazing thickness is 0.7-0.8 mm; then turning the body upside down and immersing it in the glaze slurry, the glazing thickness is 0.5-0.6 mm, and the bottom of the body is not glazed and air-dried;

[0022] (3) The glazed and dried green body is placed in an electric kiln for firing. The firing process includes the following steps:

[0023] Stage 1: The kiln temperature rises from room temperature to 1250°C over 7.5 hours;

[0024] The second stage: keep the temperature at 1250℃ for 120min, add oil firewood for the first time when the temperature is kept at 110min, and the amount of oil firewood added is 60g for every 0.2 cubic meter of kiln space. After the temperature is kept at 1260℃ for 5min, keep the temperature at 1260℃ for 5min, add oil firewood for the second time when the temperature is kept at 2min, and the amount of oil firewood added is 70g for every 0.2 cubic meter of kiln space; after the temperature is kept at 1270℃ for 10min, keep the temperature at 1270℃ for 5min, and add oil firewood for the third time when the temperature is kept at 2min, and the amount of oil firewood added is 80g for every 0.2 cubic meter of kiln space;

[0025] The third stage: after the insulation is completed, the power is turned off. When the kiln temperature drops to 1200℃, the furnace door is opened. When the kiln temperature drops to 1050℃, the furnace door is closed. The kiln is powered on and kept at 1050℃ for 30 minutes. When the insulation reaches 15 minutes, add oil firewood once every 3 minutes, for a total of 3 times. The amount of oil firewood added each time is 48g per 0.2 cubic meters of kiln space.

[0026] The fourth stage: After the heat preservation is completed, the temperature drops naturally until it is ready for kiln discharge.

[0027] Furthermore, the preparation method of the plant ash is: burning pine wood, collecting the ashes, grinding them into powder, and passing through a 60-70 mesh sieve.

[0028] After adopting the above technical solution, the present invention has the following advantages:

[0029] 1. The blue partridge-spotted Jian tea bowl fired by the present invention has silver-blue banded patterns distributed on a dark blue background. The banded patterns are stacked one after another and are long and continuous. The banded patterns are clear and hidden in the glaze. The glaze surface is smooth and moist, and the rim is golden, which is beautiful and novel.

[0030] 2. The process flow of the present invention is clear, easy to control, has few defects and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a photo illustration of a Jian ware prepared in Example 1 of the present invention;

[0032] Figure 2 This is a photographic illustration of the Jian ware prepared in Example 1 of the present invention (from another angle). DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] Example 1

[0036] The preparation process of blue partridge-spotted 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: 2.2 parts by weight of red clay, 4.5 parts by weight of kaolin, and 0.25 parts by weight of glaze stone are mixed, crushed, washed, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is subjected to wheel throwing, trimming, biscuit firing, and cooling to obtain the green body;

[0039] The glaze slurry is prepared by the following method: 500 parts by weight of glaze stone, 53 parts by weight of plant ash, 22 parts by weight of limestone, 30 parts by weight of potassium feldspar and 605 parts by weight of water are weighed and added into a ball mill for grinding, and after grinding, the mixture is passed through a 120-mesh sieve to obtain a glaze slurry;

[0040] 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;

[0041] The preparation method of the plant ash is as follows: burning pine wood, collecting the ashes, grinding them into powder, and passing through a 60-70 mesh sieve.

[0042] (2) glazing: pouring the glaze slurry into the body, the glazing thickness is 0.7-0.8 mm; then turning the body upside down and immersing it in the glaze slurry, the glazing thickness is 0.5-0.6 mm, and the bottom of the body is not glazed and air-dried;

[0043] (3) The glazed and dried green body is placed in an electric kiln for firing. The firing process includes the following steps:

[0044] Stage 1: The kiln temperature rises from room temperature to 1250°C over 7.5 hours;

[0045] The second stage: keep the temperature at 1250℃ for 120min, add oil firewood for the first time when the temperature is kept at 110min, and the amount of oil firewood added is 60g for every 0.2 cubic meter of kiln space. After the temperature is kept at 1260℃ for 5min, keep the temperature at 1260℃ for 5min, add oil firewood for the second time when the temperature is kept at 2min, and the amount of oil firewood added is 70g for every 0.2 cubic meter of kiln space; after the temperature is kept at 1270℃ for 10min, keep the temperature at 1270℃ for 5min, and add oil firewood for the third time when the temperature is kept at 2min, and the amount of oil firewood added is 80g for every 0.2 cubic meter of kiln space;

[0046] The third stage: after the insulation is completed, the power is turned off. When the kiln temperature drops to 1200℃, the furnace door is opened. When the kiln temperature drops to 1050℃, the furnace door is closed. The kiln is powered on and kept at 1050℃ for 30 minutes. When the insulation reaches 15 minutes, add oil firewood once every 3 minutes, for a total of 3 times. The amount of oil firewood added each time is 48g per 0.2 cubic meters of kiln space.

[0047] The fourth stage: After the heat preservation is completed, the temperature drops naturally until it is ready for kiln discharge.

[0048] This embodiment uses a kiln with a furnace space of 0.2 cubic meters for firing.

[0049] refer to Figure 1 and Figure 2 The blue partridge-spotted Jian tea bowl fired in this embodiment has silver-blue banded patterns distributed on a dark blue background. The banded patterns are stacked one after another and stretch for a long time. The banded patterns are clear and hidden in the glaze. The glaze surface is smooth and moist, and the rim is golden, which is beautiful and novel.

[0050] During the preparation process of Jianzhan, the inventor went through a large number of experimental screening and optimization, such as the selection of the raw material components of the body and glaze, the firing curve during the firing process, the amount of oil and firewood input, and the timing of input, before he prepared the beautiful blue partridge-spotted Jianzhan.

[0051] 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:

[0052] Comparative Example 1

[0053] The difference between this comparative example and Example 1 is that:

[0054] The green body is prepared by the following method: 2.2 parts by weight of laterite and 4.5 parts by weight of kaolin are mixed, crushed, washed, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is formed by wheel throwing, trimming, biscuit firing, and cooling to obtain the green body;

[0055] The Jian ware obtained in this comparative example has sparse and fine glaze patterns.

[0056] Comparative Example 2

[0057] The difference between this comparative example and Example 1 is that:

[0058] Step (3) second stage: keep warm at 1250°C for 120 minutes, add oil firewood for the first time when the temperature is kept warm to 110 minutes, and add 60g of oil firewood for every 0.2 cubic meter of kiln space; after the temperature is kept warm, the temperature of the kiln is raised to 1260°C for 5 minutes, and kept warm at 1260°C for 5 minutes; when the temperature is kept warm to 2 minutes, add oil firewood for the second time, and add 60g of oil firewood for every 0.2 cubic meter of kiln space; after the temperature is kept warm, the temperature of the kiln is raised to 1270°C for 10 minutes, and kept warm at 1270°C for 5 minutes; when the temperature is kept warm to 2 minutes, add oil firewood for the third time, and add 60g of oil firewood for every 0.2 cubic meter of kiln space;

[0059] The Jian ware obtained in this comparative example has sparse glaze patterns.

[0060] Comparative Example 3

[0061] The difference between this comparative example and Example 1 is that:

[0062] Step (3) second stage: keep the temperature at 1250°C for 120 minutes, add oil firewood for the first time when the temperature is kept at 110 minutes, and add 60g of oil firewood for every 0.2 cubic meter of kiln space. After the temperature is kept at 1260°C for 5 minutes, keep the temperature at 1260°C for 5 minutes, and add oil firewood for the second time when the temperature is kept at 2 minutes, and add 70g of oil firewood for every 0.2 cubic meter of kiln space.

[0063] The Jian ware obtained in this comparative example has sparse glaze patterns, and the patterns are protruding from the glaze surface, and the glaze smoothness is poor.

[0064] Comparative Example 4

[0065] The difference between this comparative example and Example 1 is that:

[0066] Step (3) The third stage: After the insulation is completed, the power is turned off. When the kiln temperature drops to 1200°C, the furnace door is opened. When the kiln temperature drops to 1050°C, the furnace door is closed. Oil firewood is added at an interval of 3 minutes for a total of 3 times. The amount of oil firewood added each time is 48g per 0.2 cubic meter of kiln space.

[0067] The Jian ware obtained in this comparative example has a glaze pattern that is a mixture of silver and yellowish brown, not silver-blue, and lacks aesthetic appeal.

[0068] 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 blue partridge-spotted 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: 2-2.5 parts by weight of red clay, 4-5 parts by weight of kaolin, and 0.2-0.3 parts by weight of glaze stone are mixed, crushed, washed, passed through an 80-100 mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is thrown into shape, trimmed, bisque fired, and cooled to obtain the green body; The glaze slurry is prepared by the following method: 500 parts by weight of glaze stone, 50-55 parts by weight of plant ash, 20-23 parts by weight of limestone, 28-32 parts by weight of potassium feldspar and 600-610 parts by weight of water are weighed, added into a ball mill, and ground, and after grinding, passed through a 100-120 mesh sieve to obtain a glaze slurry; 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; (2) glazing: pouring the glaze slurry into the body, the glazing thickness is 0.7-0.8 mm; then turning the body upside down and immersing it in the glaze slurry, the glazing thickness is 0.5-0.6 mm, and the bottom of the body is not glazed and air-dried; (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process includes the following steps: The first stage: the kiln temperature rises from room temperature to 1250℃ over 7-8h; The second stage: keep the temperature at 1250℃ for 115-120min, add oil firewood for the first time when the temperature reaches 108-112min, and add 58-62g of oil firewood for every 0.2 cubic meter of kiln space. After the temperature is kept at 1250℃, the temperature is increased to 1260℃ for 4-6min, and kept at 1260℃ for 4-6min. When the temperature is kept at 2min, add oil firewood for the second time, and add 70g of oil firewood for every 0.2 cubic meter of kiln space. After the temperature is kept at 1250℃, the temperature is increased to 1270℃ for 9-11min, and kept at 1270℃ for 4-6min. When the temperature is kept at 2min, add oil firewood for the third time, and add 80g of oil firewood for every 0.2 cubic meter of kiln space. The third stage: after the insulation is completed, the power is turned off. When the kiln temperature drops to 1190-1200℃, the furnace door is opened. When the kiln temperature drops to 1045-1055℃, the furnace door is closed. The kiln is powered on and kept at 1045-1055℃ for 28-32 minutes. When the temperature is kept at 15-16 minutes, oil firewood is added, once every 3 minutes, for a total of 3 times. The amount of oil firewood added each time is 48g per 0.2 cubic meter of kiln space. The fourth stage: After the heat preservation is completed, the temperature drops naturally until it is ready for kiln discharge.

2. The preparation process of the blue partridge-spotted 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: 2.2 parts by weight of red clay, 4.5 parts by weight of kaolin, and 0.25 parts by weight of glaze stone are mixed, crushed, washed, passed through an 80-mesh sieve, filtered, refined, and aged to obtain green mud; the green mud is subjected to wheel throwing, trimming, biscuit firing, and cooling to obtain the green body; The glaze slurry is prepared by the following method: 500 parts by weight of glaze stone, 53 parts by weight of plant ash, 22 parts by weight of limestone, 30 parts by weight of potassium feldspar and 605 parts by weight of water are weighed and added into a ball mill for grinding, and after grinding, the mixture is passed through a 120-mesh sieve to obtain a glaze slurry; 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; (2) glazing: pouring the glaze slurry into the body, the glazing thickness is 0.7-0.8 mm; then turning the body upside down and immersing it in the glaze slurry, the glazing thickness is 0.5-0.6 mm, and the bottom of the body is not glazed and air-dried; (3) The glazed and air-dried green body is placed in an electric kiln for firing. The firing process includes the following steps: Stage 1: The kiln temperature rises from room temperature to 1250°C over 7.5 hours; The second stage: keep the temperature at 1250℃ for 120min, add oil firewood for the first time when the temperature is kept at 110min, and the amount of oil firewood added is 60g for every 0.2 cubic meter of kiln space. After the temperature is kept at 1260℃ for 5min, keep the temperature at 1260℃ for 5min, add oil firewood for the second time when the temperature is kept at 2min, and the amount of oil firewood added is 70g for every 0.2 cubic meter of kiln space; after the temperature is kept at 1270℃ for 10min, keep the temperature at 1270℃ for 5min, and add oil firewood for the third time when the temperature is kept at 2min, and the amount of oil firewood added is 80g for every 0.2 cubic meter of kiln space; The third stage: after the insulation is completed, the power is turned off. When the kiln temperature drops to 1200℃, the furnace door is opened. When the kiln temperature drops to 1050℃, the furnace door is closed. The kiln is powered on and kept at 1050℃ for 30 minutes. When the insulation reaches 15 minutes, add oil firewood once every 3 minutes, for a total of 3 times. The amount of oil firewood added each time is 48g per 0.2 cubic meters of kiln space. The fourth stage: After the heat preservation is completed, the temperature drops naturally until it is ready for kiln discharge.

3. The preparation process of the blue partridge-spotted Jianzhan according to claim 1 or 2, characterized in that: The preparation method of the plant ash is as follows: burning pine wood, collecting the ashes, grinding them into powder, and passing through a 60-70 mesh sieve.

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