CN107602083B - Preparation process of Jun porcelain with natural cracks - Google Patents
Preparation process of Jun porcelain with natural cracks Download PDFInfo
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- CN107602083B CN107602083B CN201710892713.7A CN201710892713A CN107602083B CN 107602083 B CN107602083 B CN 107602083B CN 201710892713 A CN201710892713 A CN 201710892713A CN 107602083 B CN107602083 B CN 107602083B
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Abstract
A preparation process of Jun porcelain with natural cracks comprises the following specific steps: step one, placing the dried biscuit into a kiln for primary firing to obtain a biscuit; step two, adhering a layer of biscuit raw material with the thickness of 0.1-0.2cm on the surface of the biscuit, and then placing the biscuit raw material into the kiln again for secondary firing; step three, cooling the biscuit after secondary firing to 200 ℃, taking out the biscuit, placing the biscuit in a container with constant temperature and constant pressure, preserving heat for 1-2 hours, taking out the biscuit, and naturally cooling to room temperature; step four, glazing the biscuit after the secondary firing, and drying again after glazing; and fifthly, placing the glazed biscuit into a kiln for firing, wherein the firing process is subjected to three-stage glaze firing. The invention carries out a series of biscuit firing and glaze firing on the biscuit, not only improves the strength of the biscuit of the Jun porcelain and is convenient for glazing, but also has uneven concave-convex surfaces due to the existence of natural cracks on the surface, and the biscuit is brighter in color level due to different heating degrees when being heated.
Description
Technical Field
The invention belongs to the field of Jun porcelain, and particularly relates to a preparation process of Jun porcelain with natural cracks.
Background
The Jun kiln is one of five famous kilns in Song dynasty in China, is driven by Ru, officer, brother and fixed kilns simultaneously, and has the characteristics of modesty, muddy, primitive simplicity and elegance in shape, clear edges and corners, beautiful lines, simple and elegant ornamentation and atmosphere. Jun porcelain traditional works stand, tripod, bowl, washing, bottle and other furnishing articles, and are placed in a court room to be grand and bright; the tea has the advantages of long storage time, pleasant appearance and elegant charm. However, the conventional production process of the Jun porcelain is complex, the Jun porcelain is not easy to fire, a plurality of working procedures are required from material selection to finished product firing, and even small errors can cause the previous work to be abandoned, no matter which working procedure is careless, which is also the reason for extremely low treasure rate of the Jun porcelain.
The traditional sintering method of the kiln is to use copper oxide as a coloring agent and sinter the copper oxide at 1280-1300 ℃. The biscuit is subjected to biscuit firing before glazing, and then glaze firing is carried out after glazing, wherein the glaze firing is the most critical step and also the most important step for determining the appearance quality of a product. Since the 50 s, in the practice of jun porcelain production, workers and technologists made a lot of researches on the firing of the jun porcelain, but many defects still exist, and in order to overcome the defects, it is necessary to develop a new jun porcelain manufacturing method.
Disclosure of Invention
The invention aims to provide a preparation process of Jun porcelain with natural cracks.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a preparation process of Jun porcelain with natural cracks comprises the following specific steps:
step one, placing the dried biscuit into a kiln for firing, closing a kiln door when the firing temperature is raised to 550-;
step two, adhering a layer of biscuit raw material with the thickness of 0.1-0.2cm on the surface of the biscuit, then placing the biscuit raw material into a furnace kiln again for secondary firing, wherein the heating rate is 12-14 ℃/min when the temperature is 550-600 ℃, and the heating rate is 5-7 ℃ when the temperature is increased to 980-1000 ℃;
step three, cooling the biscuit after secondary firing to 200 ℃, taking out the biscuit, placing the biscuit in a container with the pressure of 200MPa and the temperature of 80-100 ℃ at constant temperature and constant pressure, preserving heat for 1-2 hours, taking out the biscuit, and naturally cooling the biscuit to room temperature;
step four, glazing the biscuit after the secondary firing, and drying again after glazing;
step five, placing the glazed green body into a kiln for firing, wherein the firing process mainly comprises three stages:
(1) first-stage glaze firing at the temperature of 0-1040 ℃:
a. the temperature is 0-500 ℃, the heating rate is 5-7 ℃/min, and the temperature is kept for 1-1.5 hours;
b. the temperature is 500-;
(2) second-stage glaze firing at 1040-1250 deg.C with a heating rate of 5-7 deg.C/min, and maintaining for 2.5-3.5 hr;
(3) and the third-stage glaze firing is carried out at the temperature of 1250-.
Further optimizing, still include the cooling stage after the jun porcelain glaze burns, mainly include two stages:
a. low-speed cooling, cooling to 180-200 ℃ within 8-10 hours,
b. rapidly cooling, and cooling to room temperature within 0.5-1 hr.
And further optimizing, picking the fired plain tire, and cleaning floating dust in the plain tire before water spraying treatment.
And further optimizing, wherein the glazing step comprises the steps of pouring glaze slurry into the cavity of the plain body, slowly rotating the plain body to uniformly distribute the glaze slurry on the inner surface of the cavity, and pouring out the redundant glaze slurry.
And further optimizing, wherein the glazing step is to wholly immerse the plain body into the glaze slip of the Jun glaze until the surface layer of the plain body is uniform, and then take out.
Further optimizing, the glazing step is that while the plain tire is rotated, the glaze slip of the jun glaze is sprayed on the surface of the plain tire from top to bottom by a spoon until the surface glaze slip is uniform.
And further optimizing, wherein the glazing is to carry out secondary glazing on the plain tire subjected to the primary glazing until the required glaze layer thickness is reached.
And further optimizing, wherein the glazing is to perform dropping or plaque processing on the plain tire subjected to the primary glazing by dipping the glaze with a writing brush.
The beneficial effects of the invention are mainly divided into several aspects:
compared with primary biscuit firing, the secondary biscuit firing temperature of the Jun porcelain is unchanged, but the heating rate is reduced, because a thin biscuit slurry is coated on the outer surface of the biscuit after the primary biscuit firing, if the temperature is increased too fast, the water loss rate of the outer-layer slurry is too fast, so that the Jun porcelain can fall off seriously after being cracked, and the surface layer of the Jun porcelain cannot realize the effect of natural cracks;
after the second biscuit firing, the Jun porcelain biscuit with the natural cracks is cooled to 190-200 ℃, taken out and placed in a container with constant temperature and constant pressure, and the method can effectively prevent the biscuit with the cracks on the outer layer from falling off due to the excessively high cooling speed;
thirdly, glaze firing is the most key step of preparing the whole Jun porcelain, and the temperature control is the most important step, so that the heating rate is necessarily slow before the moisture is completely volatilized, the moisture in the Jun porcelain matrix is mainly volatilized before 500 ℃, and the decomposition and volatilization of various oxides are mainly carried out after 500 ℃, so that the heating rate can be slightly accelerated, and the stage is used for preparing for continuously heating later;
compared with the prior art, the invention has the advantages that the biscuit is subjected to a series of biscuit firing and glaze firing, the strength of the biscuit of the Jun porcelain is improved, glazing is convenient, uneven concave-convex surfaces appear due to natural cracks on the surface, and the biscuit is brighter in color level due to different heating degrees when being heated.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the scope of the present invention is not limited to the following examples. The procedures, conditions, reagents, experimental methods and the like of the present invention are general knowledge in the art, and the present invention is not particularly limited except for the contents specifically mentioned below.
Example 1
Step one, placing the dried biscuit into a kiln for firing, closing the kiln door when the firing temperature rises to 550 ℃, continuing to rise to 980 ℃, stopping firing, and taking out the biscuit after cooling to obtain a biscuit, wherein the temperature rise rate at the stage is 20 ℃/min;
step two, adhering a layer of biscuit slurry with the thickness of 0.1cm on the surface of the biscuit, then placing the biscuit slurry into a furnace kiln again for secondary firing, wherein the heating rate is 12 ℃/min when the temperature is 550 ℃, and the heating rate is 5 ℃ when the temperature rises to 980 ℃, and at the moment, the heating rate is not too fast, so that the outer layer of the biscuit is prevented from falling off;
step three, cooling the biscuit after the secondary firing to 190 ℃, taking out the biscuit, placing the biscuit in a container with the pressure of 200MPa and the temperature of 80 ℃ at constant temperature and constant pressure, preserving the heat for 1 hour, taking out the biscuit, and naturally cooling the biscuit to room temperature;
step four, glazing the biscuit after the secondary firing, and drying again after glazing;
step five, placing the glazed green body into a kiln for firing, wherein the firing process mainly comprises three stages:
(1) first-stage glaze firing at the temperature of 0-1040 ℃:
a. the temperature is 0-500 ℃, the heating rate is 5 ℃/min, and the temperature is kept for 1 hour;
b. the temperature is 500-;
(2) second-stage glaze firing at 1040-1250 deg.C with a heating rate of 5 deg.C/min, and keeping the temperature for 2.5 hours;
(3) and the third-stage glaze firing is carried out at the temperature of 1250-.
In the invention, the glaze-fired Jun porcelain also needs to be subjected to a cooling stage, wherein the cooling stage comprises low-speed cooling and then rapid cooling, the low-speed cooling is to reduce the temperature to 180 ℃ within 8 hours, and the rapid cooling is to cool the temperature to room temperature within 0.5 hour, so that the integrity and the color of the Jun porcelain can be effectively protected.
The glazing mode in the invention is to immerse the whole body of the biscuit in the glaze slip of the Jun glaze until the surface layer of the biscuit is uniform and then take out.
Example 2
Step one, placing the dried biscuit into a kiln for firing, closing a kiln door when the firing temperature rises to 575 ℃, stopping firing when the firing temperature continues to 990 ℃, wherein the temperature rise rate at the stage is 21 ℃/min, and taking out the biscuit after cooling to obtain a biscuit;
step two, adhering a layer of biscuit slurry with the thickness of 0.15cm on the surface of the biscuit, then placing the biscuit slurry into a furnace kiln again for secondary firing, wherein the heating rate is 13 ℃/min when the temperature is 575 ℃, and the heating rate is 6 ℃ when the temperature is increased to 990 ℃, and the heating rate is not too fast at the moment, so that the outer layer of the biscuit is prevented from falling off;
step three, cooling the biscuit after the secondary firing to 195 ℃, taking out the biscuit, placing the biscuit in a container with the pressure of 200MPa and the temperature of 90 ℃ at constant temperature and constant pressure, preserving the heat for 1.5 hours, taking out the biscuit, and naturally cooling the biscuit to room temperature;
step four, glazing the biscuit after the secondary firing, and drying again after glazing;
step five, placing the glazed green body into a kiln for firing, wherein the firing process mainly comprises three stages:
(1) first-stage glaze firing at the temperature of 0-1040 ℃:
a. the temperature is 0-500 ℃, the heating rate is 6 ℃/min, and the temperature is kept for 1.25 hours;
b. the temperature is 500-;
(2) second-stage glaze firing at 1040-1250 ℃ with the heating rate of 6 ℃/min and heat preservation for 3 hours;
(3) and the third-stage glaze firing is carried out at the temperature of 1250-.
In the invention, the glaze-fired Jun porcelain also needs to be subjected to a cooling stage, wherein the cooling stage comprises low-speed cooling and then rapid cooling, the low-speed cooling is to reduce the temperature to 190 ℃ within 9 hours, and the rapid cooling is to cool the temperature to room temperature within 0.75 hours, so that the integrity and the color of the Jun porcelain can be effectively protected.
The glazing mode of the invention is to pour the glaze slip into the cavity of the plain body, slowly rotate the plain body to make the glaze slip uniformly distributed on the inner surface of the cavity, and then pour out the redundant glaze slip.
Example 3
Step one, placing the dried biscuit into a kiln for firing, closing the kiln door when the firing temperature rises to 600 ℃, stopping firing when the firing temperature continues to rise to 1000 ℃, wherein the temperature rise rate at the stage is 22 ℃/min, and taking out the biscuit after cooling to obtain a biscuit;
step two, adhering a layer of biscuit slurry with the thickness of 0.2cm on the surface of the biscuit, then placing the biscuit slurry into a furnace kiln again for secondary firing, wherein the heating rate is 14 ℃/min when the temperature is 600 ℃, the heating rate is 7 ℃ when the temperature rises to 1000 ℃, and the heating rate is not too fast at the moment, so that the outer layer of the biscuit is prevented from falling off;
step three, cooling the biscuit after the secondary firing to 200 ℃, taking out the biscuit, placing the biscuit in a container with the pressure of 200MPa and the temperature of 100 ℃ at constant temperature and constant pressure, preserving the heat for 2 hours, taking out the biscuit, and naturally cooling the biscuit to room temperature;
step four, glazing the biscuit after the secondary firing, and drying again after glazing;
step five, placing the glazed green body into a kiln for firing, wherein the firing process mainly comprises three stages:
(1) first-stage glaze firing at the temperature of 0-1040 ℃:
a. the temperature is 0-500 ℃, the heating rate is 7 ℃/min, and the temperature is kept for 1.5 hours;
b. the temperature is 500-;
(2) second-stage glaze firing at 1040-1250 ℃ with the heating rate of 7 ℃/min, and keeping the temperature for 3.5 hours;
(3) and carrying out third-stage glaze firing at 1250-1300 ℃, wherein the heating rate is 7 ℃/min, and the temperature is kept for 2 hours.
In the invention, the glaze-fired Jun porcelain also needs to be subjected to a cooling stage, wherein the cooling stage comprises low-speed cooling and then rapid cooling, the low-speed cooling is to reduce the temperature to 200 ℃ within 10 hours, and the rapid cooling is to cool the temperature to room temperature within 1 hour, so that the integrity and the color of the Jun porcelain can be effectively protected.
The glazing mode in the invention is that the glaze slip of the jun glaze is sprayed on the surface of the plain body from top to bottom by adopting a spoon while the plain body is rotated until the surface layer glaze slip is uniform.
Claims (8)
1. A preparation process of Jun porcelain with natural cracks is characterized by comprising the following steps:
step one, placing the dried biscuit into a kiln for firing, closing the kiln door when the firing temperature is raised to 550-;
step two, adhering a layer of biscuit slurry with the thickness of 0.1-0.2cm on the surface of the biscuit, then placing the biscuit slurry into the furnace kiln again for secondary firing, wherein the heating rate is 12-14 ℃/min when the temperature is 550-600 ℃, and the heating rate is 5-7 ℃ when the temperature is increased to 980-1000 ℃;
step three, cooling the biscuit after the secondary firing to 190-200 ℃, taking out the biscuit, placing the biscuit in a container with the pressure of 200MPa and the temperature of 80-100 ℃ at constant temperature and constant pressure, preserving the heat for 1-2 hours, taking out the biscuit, and naturally cooling the biscuit to room temperature;
step four, glazing the biscuit after the secondary firing, and drying again after glazing;
step five, placing the glazed green body into a kiln for firing, wherein the firing process mainly comprises three stages:
(1) first-stage glaze firing at the temperature of 0-1040 ℃:
a. the temperature is 0-500 ℃, the heating rate is 5-7 ℃/min, and the temperature is kept for 1-1.5 hours;
b. the temperature is 500-;
(2) second-stage glaze firing at 1040-1250 deg.C with a heating rate of 5-7 deg.C/min, and maintaining for 2.5-3.5 hr;
(3) and the third-stage glaze firing is carried out at the temperature of 1250-.
2. The preparation process of the Jun porcelain with the natural cracks as claimed in claim 1, wherein the Jun porcelain after glaze firing further comprises a cooling stage, and the cooling stage mainly comprises two stages:
a. low-speed cooling, cooling to 180-200 ℃ within 8-10 hours,
b. rapidly cooling, and cooling to room temperature within 0.5-1 hr.
3. The process for preparing Jun porcelain with natural cracks as claimed in claim 1, wherein the fired raw body is picked, and the qualified raw body is cleaned of floating dust in the raw body before water spraying treatment.
4. The process for preparing Jun porcelain with natural cracks as claimed in claim 1, wherein the glazing comprises pouring glaze slip into the cavity of the green body, slowly rotating the green body to uniformly distribute the glaze slip on the inner surface of the cavity, and pouring out the excess glaze slip.
5. The process for preparing Jun porcelain with natural cracks as claimed in claim 1, wherein the glazing comprises immersing the whole body of the body in the glaze slip of Jun porcelain until the surface of the body is uniform, and taking out.
6. The process for preparing Jun porcelain with natural cracks as claimed in claim 1, wherein the glazing comprises turning a plain matrix edge, and pouring Jun glaze slip from top to bottom on the surface of the plain matrix until the surface glaze slip is uniform.
7. The process for preparing Jun porcelain with natural cracks as claimed in claim 1, wherein the glazing is to perform secondary glazing on the plain body after primary glazing until the required glaze layer thickness is achieved.
8. The process for preparing Jun porcelain with natural cracks according to claim 1, wherein the glazing is carried out by dipping glaze on a plain body which is subjected to one-time glazing by a writing brush to drip or patch.
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| CN201710892713.7A CN107602083B (en) | 2017-09-27 | 2017-09-27 | Preparation process of Jun porcelain with natural cracks |
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| CN107602083B true CN107602083B (en) | 2020-10-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342542A (en) * | 2013-06-28 | 2013-10-09 | 李学武 | Method for manufacturing porcelain artware by combining processes of jun porcelain, Ru porcelain and peony porcelain |
| CN104513056A (en) * | 2013-09-27 | 2015-04-15 | 青岛市首胜实业有限公司 | Production method of "Jun" porcelain |
| CN105272151A (en) * | 2015-10-13 | 2016-01-27 | 施振强 | Preparation method of modern Longquan Ge kiln porcelain |
| CN106336203A (en) * | 2016-08-26 | 2017-01-18 | 温书强 | Jun porcelain sintering process |
| CN107021737A (en) * | 2017-03-28 | 2017-08-08 | 许昌学院 | Pottery burning process |
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2017
- 2017-09-27 CN CN201710892713.7A patent/CN107602083B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342542A (en) * | 2013-06-28 | 2013-10-09 | 李学武 | Method for manufacturing porcelain artware by combining processes of jun porcelain, Ru porcelain and peony porcelain |
| CN104513056A (en) * | 2013-09-27 | 2015-04-15 | 青岛市首胜实业有限公司 | Production method of "Jun" porcelain |
| CN105272151A (en) * | 2015-10-13 | 2016-01-27 | 施振强 | Preparation method of modern Longquan Ge kiln porcelain |
| CN106336203A (en) * | 2016-08-26 | 2017-01-18 | 温书强 | Jun porcelain sintering process |
| CN107021737A (en) * | 2017-03-28 | 2017-08-08 | 许昌学院 | Pottery burning process |
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