CN115180830A - Jun porcelain turtle back texture glaze and process for firing jun porcelain by using same - Google Patents
Jun porcelain turtle back texture glaze and process for firing jun porcelain by using same Download PDFInfo
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- CN115180830A CN115180830A CN202110374547.8A CN202110374547A CN115180830A CN 115180830 A CN115180830 A CN 115180830A CN 202110374547 A CN202110374547 A CN 202110374547A CN 115180830 A CN115180830 A CN 115180830A
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- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 59
- 238000010304 firing Methods 0.000 title claims abstract description 58
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- 241000610761 Psathyrotes Species 0.000 claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 27
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- 239000005751 Copper oxide Substances 0.000 claims abstract description 10
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
Abstract
The invention discloses a jun porcelain turtle back texture glaze and a process for firing jun porcelain by using the same, wherein the turtle back texture glaze is prepared from the following raw materials in parts by weight: 50-60 parts of melilite, 10-20 parts of fluorite, 5-15 parts of feldspar, 0.5-1.5 parts of iron ore, 0.2-0.6 part of copper oxide, 10-15 parts of quartz stone, 2-8 parts of calcite and 0.5-1.5 parts of selenium oxide. The glaze material of claim 1 is applied on the plain tire, the glazing thickness is controlled to be 3-4mm, the glaze material is fired, the outer layer of the glaze material is melted and develops color in the firing process, the inner layer of the glaze material is not melted and generates fine cracks along with the heated expansion of the tire body, the outer layer of the glaze material is filled with the cracks along with the generation of the cracks on the inner layer of the glaze material, the cracks start to be gradually melted under the double heating of the inner tire body and the outer melted glaze material, then the cracks are widened to generate obvious turtleback grains, and the turtleback grain Jun porcelain is obtained after the firing.
Description
Technical Field
The invention relates to the technical field of porcelain firing, in particular to jun porcelain turtle back texture glaze and a process for firing jun porcelain by using the same.
Background
Jun porcelain, yuzhou city, henan province of origin, the kiln is named as ancient Jun stand in the interior of Yuzhou city. The traditional Jun porcelain is a milky bright and purple masking porcelain which is fired at high temperature in a reducing atmosphere by taking a copper element and an iron element as main colorants, and the preparation process specifically comprises the following steps: the surface of the biscuit is coated with a layer of glaze slip consisting of natural ores, artificially prepared raw materials and chemical raw materials by adopting a method of dipping, brushing or spraying glaze, and the biscuit is prepared by matching with a firing process after being dried. The natural ore mainly comprises feldspar, calcite, agate, talc, copper ore, iron ore and the like, the artificially prepared raw materials comprise plant ash, ox bone ash and the like, and the chemical raw materials mainly comprise copper oxide, tin dioxide, zinc oxide and the like. The glaze can not be separated from the blank body and exists alone, so that the physical and chemical properties of the blank body, namely the chemical composition, the expansion performance, the finished product performance requirements and the like of the blank body, must be firstly mastered when glaze research is carried out. The functional characteristics of the glaze material depend on different raw material proportions and the physicochemical environment of synthesis. The raw materials are mainly natural minerals, the fluctuation of the components is large, and difficulty is brought to theoretical derivation. Different chemical compositions react at different temperatures or under redox conditions, which can have an effect on the results.
In the ceramic firing process, due to the fact that the kiln contains various coloring elements, the porcelain can show an unexpected glaze color effect after being taken out of the kiln through oxidation or reduction. Initially, the occurrence of transmutation was considered an unreliability because one could not predict it. Along with the deep understanding of people on the transmutation, the defect of the transmutation is gradually favored by people, and the defect of the glaze surface caused by kiln fire leads people to endless aftertaste after long-term use. However, because the jun porcelain has a unique glaze formula and a unique firing system, the applicant researches a glaze formula capable of realizing turtle-back texture and a corresponding jun porcelain firing process based on the fact that the prior art reports the kiln-change glaze jun porcelain with rich glaze color and controllable texture.
Disclosure of Invention
The invention aims to solve the defects of the technical problems and provides a jun porcelain turtle back texture glaze and a process for firing jun porcelain by using the glaze.
In order to solve the technical problems, the invention adopts the technical scheme that: the jun porcelain turtle back texture glaze is prepared from the following raw materials in parts by weight: 50-60 parts of melilite, 10-20 parts of fluorite, 5-15 parts of feldspar, 0.5-1.5 parts of iron ore, 0.2-0.6 part of copper oxide, 10-15 parts of quartz stone, 2-8 parts of calcite and 0.5-1.5 parts of selenium oxide.
The invention further optimizes the jun porcelain turtle back texture glaze: the feed is prepared from the following raw materials in parts by weight: 55 parts of melilite, 15 parts of fluorite, 10 parts of feldspar, 1 part of iron ore, 0.4 part of copper oxide, 13 parts of quartz stone, 5 parts of calcite and 1 part of selenium oxide.
The invention further optimizes the jun porcelain turtle back texture glaze: the iron ore is red spot stone, the feldspar is nine-mountain feldspar, and the fluorite is Fangcheng fluorite.
The process for firing the turtle back texture jun porcelain by using the turtle back texture glaze comprises the following steps: the glaze material of claim 1 is applied on the plain body, the thickness of the applied glaze material is controlled to be 3-4mm, the glaze material is fired, the outer layer of the glaze material is melted and develops color in the firing process, the inner layer of the glaze material is not melted and generates fine cracks along with the heated expansion of the matrix, the outer layer of the glaze material is filled with the cracks along with the cracks generated on the inner layer of the glaze material, the cracks begin to be gradually melted under the double heating of the inner matrix and the outer melted glaze material, further the cracks are widened to generate obvious tortoise back textures, and the tortoise back texture Jun porcelain is obtained after the firing.
The process for firing the tortoise back texture jun porcelain is further optimized as follows: the size of the finally formed single tortoiseshell chip is controlled by controlling the temperature rise rate in the firing process, and the method specifically comprises the following steps: the temperature rise rate in the kiln is higher, the matrix expands rapidly, the melting state of the glaze outer layer is accelerated, and the area of a single chip is smaller; when the temperature rise rate in the kiln is low, the expansion of the matrix is slowed down, and the area of the single chip is large.
The process for firing the tortoise back texture jun porcelain is further optimized as follows: and glazing the blank by a glaze dipping mode, and controlling the thickness of the glaze by using the glaze dipping operation time.
The process for firing the tortoise back texture jun porcelain is further optimized as follows: the firing process is divided into the following stages:
s1: the temperature in the furnace is raised to 400-500 ℃ within 1 h;
s2: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 2.5-3 h;
s3: under the oxidizing atmosphere, the temperature in the furnace is reduced to 500-600 ℃ within 1 h;
s4: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 1 h;
s5: under the reducing atmosphere, the temperature in the furnace is reduced to 950 ℃ within 1.5 h;
s6: under the reducing atmosphere, the temperature in the furnace is increased to 1150 ℃ within 2-3 h;
s7: under the reducing atmosphere, the temperature in the furnace is increased to 1280 ℃ within 4 h;
s8: under the oxidizing atmosphere, the temperature in the furnace is raised to 1320 ℃ within 2 h;
s9: and (4) cooling the temperature in the furnace to 100 ℃ within 2d, and taking out of the furnace to obtain the turtle-back texture Jun porcelain product.
Advantageous effects
The thickness of the glaze layer in the conventional Jun porcelain firing process is usually 1-2mm, for example, "the thickness of glazing is 1.5-2.0mm" described in patent application document CN202011380449.7 and "the thickness of glazing is 1.2-1.5 mm" described in patent application document CN 201710897555.4. The thick-glaze Jun porcelain pattern mainly depends on different coloring elements in the glaze layer to present different colors in different combustion (oxidation or reduction atmosphere) environments, and the glaze layer is thin and is relatively uniformly heated, so that the glaze layering condition cannot occur. The glazing thickness in the Jun porcelain firing process is 3-4mm, the glaze layer is too thick, the part of the porcelain in a high-temperature condition in a kiln, which is in contact with air, of the outer layer of the glaze is controlled by combustion atmosphere, the glaze starts to be in a molten state and develop color at high temperature, the part of the inner layer of the glaze, which is in contact with a carcass, is not molten, fine cracks appear along with the heated expansion of the carcass, the cracks are filled up by the glaze in the molten state of the outer layer along with the cracks on the inner layer of the glaze, and the cracks start to be gradually molten under the double heating of the molten glaze outside the inner carcass, so that the cracks are widened and obvious turtleback stripes appear.
Drawings
FIG. 1 is a schematic view showing a porcelain obtained by firing in example 5;
FIG. 2 is a schematic view showing a porcelain obtained by firing in example 6;
FIG. 3 is a schematic view showing a porcelain obtained by firing in example 7;
FIG. 4 is a schematic view of a porcelain obtained by firing in example 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example 1
The jun porcelain turtle back texture glaze is prepared from the following raw materials in parts by weight: 55 parts of melilite, 15 parts of fluorite, 10 parts of feldspar, 1 part of iron ore, 0.4 part of copper oxide, 13 parts of quartz stone, 5 parts of calcite and 1 part of selenium oxide.
The iron ore is red spot stone, the feldspar is nonadenic feldspar, and the fluorite is Fangcheng fluorite.
The nine-mountain feldspar is a geographical name, is a feldspar produced in Yuzhou, exists as a substrate of a glaze material, contains a large amount of silicon, and is in a molten colored glaze state at a high temperature.
The erythema stone is the name of Yuzhou local, is an iron ore of Yuzhou local real estate, belongs to a mixture of iron, and iron element presents mauve (pork liver purple) in an oxidative combustion atmosphere, is one of common glaze colors of Jun porcelain, and also presents the color of a patch of a tortoise back pattern.
Weighing the components of the glaze according to the formula, crushing, putting into a ball mill, and grinding: ball: the proportion of water is 1:2:1, grinding until the fineness of the powder is 0.2 percent of the residue sieved by a 250-mesh sieve, and obtaining the glaze slip with the water content of 55 percent after grinding.
Example 2
Jun porcelain turtle back texture glaze is prepared from the following raw materials in parts by weight: 50 parts of melilite, 20 parts of fluorite, 5 parts of feldspar, 1.5 parts of iron ore, 0.2 part of copper oxide, 15 parts of quartz stone, 2 parts of calcite and 1.5 parts of selenium oxide.
The raw materials are crushed, mixed and put into a ball mill for ball milling, water is added to ensure that the mass concentration of glaze reaches 56-58%, wet milling is carried out for 12-14 hours, and slurry after wet milling is sieved by a 200-300 mesh sieve to obtain glaze slurry.
Example 3
Jun porcelain turtle back texture glaze is prepared from the following raw materials in parts by weight: 60 parts of melilite, 10 parts of fluorite, 15 parts of feldspar, 0.5 part of iron ore, 0.6 part of copper oxide, 10 parts of quartz stone, 8 parts of calcite and 0.5 part of selenium oxide.
The glaze slurry is prepared by crushing the raw materials, mixing, putting into a ball mill for ball milling for 9 hours, obtaining glaze powder with the granularity of 400 meshes, adding water into the ball-milled and crushed glaze powder, uniformly mixing, stirring and fully dissolving.
Example 4
The jun porcelain turtle back texture glaze is prepared from the following raw materials in parts by weight: 52 parts of melilite, 18 parts of fluorite, 8 parts of feldspar, 1 part of iron ore, 0.5 part of copper oxide, 11 parts of quartz stone, 6 parts of calcite and 1.2 parts of selenium oxide.
The glaze slurry is prepared by crushing the raw materials, mixing, putting into a ball mill for ball milling for 10 hours, obtaining glaze powder with the granularity of 450 meshes, adding water into the ball-milled and crushed glaze powder, uniformly mixing, stirring and fully dissolving.
Example 5
A process for firing tortoise back texture Jun porcelain comprises the following steps:
preparation of plain embryo
The firing process of the green body comprises the steps of mixing, stirring and ball-milling the matrix raw materials and water in equal mass, grinding the mixture into slurry with the fineness of 300 meshes, then using the slurry to mold the slurry into the green body, standing and airing the green body, then placing the green body into a kiln to perform green firing for 5 hours at 950 ℃, and cooling the green body to the normal temperature along with the kiln to obtain the green body.
It should be noted that, the firing process of the green body may adopt any process in the prior art, and the above process is also a process for preparing the green body commonly used in the prior art.
Then, immersing the green body into the glaze slip prepared in the embodiment 1, drying the slip attached to the surface of the green body to obtain a glazed body, controlling the thickness of a final glaze layer according to the length of the material immersion time, controlling the final thickness of the glaze layer to be 3-4mm, and then placing the glazed body into a kiln to be fired, wherein the firing process is divided into the following stages:
s1: the temperature in the furnace is raised to 450 ℃ within 1 h;
s2: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ for 2.5 h;
s3: under the oxidizing atmosphere, the temperature in the furnace is reduced to 550 ℃ within 1 h;
s4: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 1 hour;
s5: under the reducing atmosphere, the temperature in the furnace is reduced to 950 ℃ within 1.5 ℃;
s6: under the reducing atmosphere, the temperature in the furnace is raised to 1150 ℃ within 2 h;
in the process, the bottom layer glaze (the glaze on the side close to the matrix) of the matrix cracks, and the surface layer glaze also begins to melt;
s7: under the reducing atmosphere, the temperature in the furnace is raised to 1280 ℃ for 4 h;
in the process, the glaze gradually takes on color;
s8: under the oxidizing atmosphere, the temperature in the furnace is raised to 1320 ℃ for 2 h;
in the process, the glaze is gradually fixed in color, and the glaze on the surface layer and the bottom layer is simultaneously melted to realize sealing so as to form turtleback lines;
s9: the temperature in the furnace is reduced to 100 ℃ within 2d (2 days), and the product is taken out of the kiln, thus obtaining the tortoise-back texture Jun porcelain product, as shown in figure 1.
Example 6
A process for firing tortoise back texture Jun porcelain comprises the following steps:
preparation of plain embryo
The firing process of the green body comprises the steps of mixing, stirring and ball-milling the matrix raw materials and water in equal mass, grinding the mixture into slurry with the fineness of 300 meshes, then using the slurry to mold the slurry into the green body, standing and airing the green body, then placing the green body into a kiln to perform green firing for 5 hours at 950 ℃, and cooling the green body to the normal temperature along with the kiln to obtain the green body.
It should be noted that, the firing process of the green body may adopt any process in the prior art, and the above process is also a process for preparing the green body commonly used in the prior art.
Then, immersing the green body into the glaze slip prepared in the embodiment 2, drying the slurry attached to the surface of the green body to obtain a glazed body, controlling the thickness of a final glaze layer according to the length of the material immersing time, controlling the final thickness of the glaze layer to be 3-4mm, and then placing the glazed body into a kiln for firing, wherein the firing process comprises the following stages:
s1: the temperature in the furnace is raised to 400 ℃ within 1 h;
s2: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ for 3 h;
s3: under the oxidizing atmosphere, the temperature in the furnace is reduced to 500 ℃ within 1 h;
s4: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 1 hour;
s5: under the reducing atmosphere, the temperature in the furnace is reduced to 950 ℃ within 1.5 h;
s6: under the reducing atmosphere, the temperature in the furnace is raised to 1150 ℃ within 2 h;
in the process, the bottom layer glaze (the glaze on the side close to the matrix) of the matrix cracks, and the surface layer glaze also begins to melt;
s7: under the reducing atmosphere, the temperature in the furnace is increased to 1280 ℃ within 4 h;
in the process, the glaze gradually takes on color;
s8: under the oxidizing atmosphere, the temperature in the furnace is raised to 1320 ℃ within 2 h;
in the process, the glaze is gradually fixed in color, and the surface layer glaze and the bottom layer glaze are simultaneously melted to realize sealing to form turtleback lines;
s9: the temperature in the furnace is reduced to 100 ℃ within 2d, and the turtle back texture Jun porcelain product is obtained after being taken out of the kiln, as shown in figure 2.
Example 7
A process for firing tortoise back texture Jun porcelain comprises the following steps:
preparation of plain embryo
The firing process of the green body comprises the steps of mixing, stirring and ball-milling the matrix raw materials and water in equal mass, grinding the mixture into slurry with the fineness of 300 meshes, then using the slurry to mold the slurry into the green body, standing and airing the green body, then placing the green body into a kiln to perform green firing for 5 hours at 950 ℃, and cooling the green body to the normal temperature along with the kiln to obtain the green body.
It should be noted that, the firing process of the green body may adopt any process in the prior art, and the above process is also a process for preparing the green body commonly used in the prior art.
Then, the raw tire is immersed in the glaze slip prepared in the embodiment 3, the glazed tire body is obtained after the slurry is adhered to the surface of the raw tire and dried, the thickness of the final glaze layer is controlled according to the immersion time, the final thickness of the glaze layer is controlled to be 3-4mm, then the glazed tire body is placed into a kiln for firing, and the firing process is divided into the following stages:
s1: the temperature in the furnace is raised to 400-500 ℃ within 1 h;
s2: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 3 h;
s3: under the oxidizing atmosphere, the temperature in the furnace is reduced to 600 ℃ within 1 h;
s4: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 1 hour;
s5: under the reducing atmosphere, the temperature in the furnace is reduced to 950 ℃ within 1.5 h;
s6: under the reducing atmosphere, the temperature in the furnace is raised to 1150 ℃ within 2.5 h;
in the process, the bottom glaze (the glaze close to one side of the tire body) of the tire body cracks, and the surface glaze also begins to melt;
s7: under the reducing atmosphere, the temperature in the furnace is increased to 1280 ℃ within 4 h;
in the process, the glaze gradually takes on color;
s8: under the oxidizing atmosphere, the temperature in the furnace is raised to 1320 ℃ within 2 h;
in the process, the glaze is gradually fixed in color, and the surface layer glaze and the bottom layer glaze are simultaneously melted to realize sealing to form turtleback lines;
s9: the temperature in the furnace is reduced to 100 ℃ within 2d, and the turtle back texture Jun porcelain product is obtained after being taken out of the kiln, as shown in figure 3.
Example 8
A process for firing tortoise back texture Jun porcelain comprises the following steps:
preparation of plain embryo
The firing process of the green body comprises the steps of mixing, stirring and ball-milling the matrix raw materials and water in equal mass, grinding the mixture into slurry with the fineness of 300 meshes, then using the slurry to mold the slurry into the green body, standing and airing the green body, then placing the green body into a kiln to perform green firing for 5 hours at 950 ℃, and cooling the green body to the normal temperature along with the kiln to obtain the green body.
It should be noted that, the firing process of the green body may adopt any process in the prior art, and the above process is also a process for preparing the green body commonly used in the prior art.
Then, the raw tire is immersed in the glaze slip prepared in the embodiment 4, the glazed tire body is obtained after the slurry is adhered to the surface of the raw tire and dried, the thickness of the final glaze layer is controlled according to the immersion time, the final thickness of the glaze layer is controlled to be 3-4mm, then the glazed tire body is placed into a kiln for firing, and the firing process is divided into the following stages:
s1: the temperature in the furnace is raised to 400-500 ℃ within 1 h;
s2: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 3 h;
s3: under the oxidizing atmosphere, the temperature in the furnace is reduced to 600 ℃ within 1 h;
s4: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 1 hour;
s5: under the reducing atmosphere, the temperature in the furnace is reduced to 950 ℃ within 1.5 h;
s6: under the reducing atmosphere, the temperature in the furnace is raised to 1150 ℃ within 2.5 h;
in the process, the bottom layer glaze (the glaze on the side close to the matrix) of the matrix cracks, and the surface layer glaze also begins to melt;
s7: under the reducing atmosphere, the temperature in the furnace is raised to 1280 ℃ for 4 h;
in the process, the glaze gradually takes on color;
s8: under the oxidizing atmosphere, the temperature in the furnace is raised to 1320 ℃ for 2 h;
in the process, the glaze is gradually fixed in color, and the surface layer glaze and the bottom layer glaze are simultaneously melted to realize sealing to form turtleback lines;
s9: the temperature in the furnace is reduced to 100 ℃ within 2d, and the turtle back texture Jun porcelain product is obtained after being taken out of the kiln, as shown in figure 4.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (7)
1. A jun porcelain turtle back texture glaze is characterized in that: the feed is prepared from the following raw materials in parts by weight: 50-60 parts of melilite, 10-20 parts of fluorite, 5-15 parts of feldspar, 0.5-1.5 parts of iron ore, 0.2-0.6 part of copper oxide, 10-15 parts of quartz stone, 2-8 parts of calcite and 0.5-1.5 parts of selenium oxide.
2. The jun porcelain turtle back texture glaze as claimed in claim 1, which is characterized in that: the feed is prepared from the following raw materials in parts by weight: 55 parts of melilite, 15 parts of fluorite, 10 parts of feldspar, 1 part of iron ore, 0.4 part of copper oxide, 13 parts of quartz stone, 5 parts of calcite and 1 part of selenium oxide.
3. The jun porcelain turtle back texture glaze as claimed in claim 1 or 2, which is characterized in that: the iron ore is red spot stone, the feldspar is nine-mountain feldspar, and the fluorite is Fangcheng fluorite.
4. The process for firing the turtle back texture jun porcelain by using the turtle back texture glaze of the jun porcelain of claim 1 is characterized in that: the glaze material of claim 1 is applied on the plain body, the thickness of the applied glaze material is controlled to be 3-4mm, the glaze material is placed in a kiln for firing, the outer layer of the glaze material is melted and develops color in the firing process, the inner layer of the glaze material is not melted and generates fine cracks along with the heated expansion of the matrix, the outer layer of the glaze material is filled with the cracks along with the cracks generated in the inner layer of the glaze material, the cracks begin to be gradually melted under the double heating of the inner matrix and the outer melted glaze material, further the cracks are widened to generate obvious turtleback grains, and the turtleback grain Jun porcelain is obtained after firing.
5. The process for firing the turtle back texture jun porcelain by using the turtle back texture glaze as claimed in claim 4, is characterized in that: the size of the finally formed single tortoiseshell chip is controlled by controlling the temperature rise rate in the firing process, and the method specifically comprises the following steps: the temperature rise rate in the kiln is higher, the matrix expands rapidly, the melting state of the glaze outer layer is accelerated, and the area of a single chip is smaller; when the temperature rise rate in the kiln is low, the expansion of the matrix is slowed down, and the area of the single chip is large.
6. The process for firing the turtle back texture jun porcelain by using the turtle back texture glaze as claimed in claim 4, is characterized in that: and glazing the blank by a glaze dipping mode, and controlling the thickness of the glaze by using the glaze dipping operation time.
7. The process for firing the turtle-back texture Jun porcelain as claimed in claim 4, which is characterized in that: the firing process is divided into the following stages:
s1: the temperature in the furnace is raised to 400-500 ℃ within 1 h;
s2: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 2.5-3 h;
s3: under the oxidizing atmosphere, the temperature in the furnace is reduced to 500-600 ℃ within 1 h;
s4: under the oxidizing atmosphere, the temperature in the furnace is raised to 1000 ℃ within 1 h;
s5: under the reducing atmosphere, the temperature in the furnace is reduced to 950 ℃ within 1.5 h;
s6: under the reducing atmosphere, the temperature in the furnace is increased to 1150 ℃ within 2-3 h;
s7: under the reducing atmosphere, the temperature in the furnace is increased to 1280 ℃ within 4 h;
s8: under the oxidizing atmosphere, the temperature in the furnace is raised to 1320 ℃ within 2 h;
s9: and (4) cooling the temperature in the furnace to 100 ℃ within 2d, and taking out of the furnace to obtain the turtle-back texture Jun porcelain product.
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| CN115894084A (en) * | 2022-11-10 | 2023-04-04 | 福建省德化非凡陶瓷有限公司 | Dehua high-white porcelain decorated by tortoise back textures and preparation process thereof |
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