Lantang jun glaze and process for firing jun porcelain using the same

Abstract

The application relates to the field of jun porcelain firing, in particular to a blue Tang jun glaze and a process for firing jun porcelain by using the same; first, a green body is dipped into a slurry of blue base glaze for 3-5 S for glazing, after the slurry of the blue base glaze attached to the surface of the green body is dried, a slurry of spot glaze is partially applied on the blue base glaze, and then the green body is dried and placed into a kiln for firing, so that the blue Tang jun porcelain is obtained. The blue Tang jun glaze and the process for firing jun porcelain by using the same have the following advantages: through specific glaze material proportioning, after high-temperature firing, the glaze material is color-stable, the glaze surface brightness is obviously enhanced, and the flowability of the glaze material in a high-temperature molten state is more controllable.

Description

Technical Field

[0001] This invention relates to the field of Jun porcelain firing, specifically to a blue Tang Jun glaze and the process of firing Jun porcelain using it. Background Technology

[0002] Jun ware is world-renowned for its vibrant colors, rich patterns, and silky glaze. The beauty of Jun ware's glaze stems from its unique firing process and the use of natural minerals instead of chemical dyes, resulting in wonderfully distinctive hues. Some Jun ware displays a deep, deep blue-green, reminiscent of a clear blue sky; others exhibit a bright, light green, like newly sprouted leaves; still others display a variety of shades of gray, yellow, and brown, giving a natural and soft feel. These glaze variations are not simple monochrome, but rather create distinct gradients on the porcelain surface, like swirling clouds or ripples on water, offering a rich and vivid experience.

[0003] Jun porcelain is produced using special methods to control temperature and oxidation-reduction environments during firing, resulting in a unique glaze layer on the surface. This glaze layer not only possesses rich and evocative colors but also a unique luster and texture. Specific glaze ratios can alter the stability of the glaze, allowing the upper glaze to naturally slide off under the influence of kiln temperature. After cooling, this creates magnificent and distinctive patterns, hence the saying that Jun porcelain is "one color in the kiln, a myriad of colors out." However, precisely because the final color of the Jun porcelain glaze is influenced by many factors, including the glaze ratio, glaze fluidity, and kiln temperature control, even glazes with the same ratio can exhibit different colors depending on various factors during the dozen or so processes. Some are bright, while others are dull. For example, the blue glaze of Jun porcelain can be categorized into lake blue, indigo, turquoise, azure, sapphire blue, navy blue, dark blue, peacock blue, sky blue, and so on. Therefore, a stable glaze ratio and firing process are crucial to the successful production of Jun porcelain.

[0004] Therefore, this invention proposes a blue Tang Jun glaze and a process for firing Jun porcelain using it to solve the problems mentioned above, such as unstable color, insufficient brightness, and difficulty in controlling the fluidity of the glaze. Summary of the Invention

[0005] The purpose of this invention is to propose a blue Tang Jun glaze and a process for firing Jun porcelain using it to solve the problems mentioned above, such as unstable color, insufficient brightness, and difficulty in controlling the fluidity of blue base glaze and mottled glaze.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A blue glaze contains the following raw materials in parts by weight: 38-43 parts of feldspar, 4-9 parts of calcite, 22-27 parts of black ore, 24-29 parts of copper ore, and 1-5 parts of manganese oxide.

[0008] The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO.

[0009] Preferably, the glaze contains the following raw materials in parts by weight: 45-50 parts calcite, 23-28 parts of the medicine, 12-17 parts quartz, 2-7 parts bone meal, 3-8 parts zinc oxide, 0.8-2 parts iron oxide, and 1-2.2 parts tin oxide.

[0010] The medicine in question is Jiushan Benyao, which is a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

[0011] A process for firing Jun porcelain with blue Tang Jun glaze involves first immersing the unglazed body in a blue glaze slurry for 3-5 seconds to apply the glaze. After the blue glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to specific areas on the blue glaze surface. After drying, the piece is fired in a kiln to obtain blue Tang Jun porcelain. The process is characterized by:

[0012] The temperature changes inside the kiln during the firing process can be divided into the following stages:

[0013] S1: The furnace temperature rises from 20℃ to 100℃ within 30 minutes;

[0014] S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes;

[0015] S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes;

[0016] S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes;

[0017] S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes;

[0018] S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes;

[0019] S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain the Blue Tang Jun glaze.

[0020] In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

[0021] During the firing process, the oxidizing atmosphere used is the flame atmosphere under conditions of complete combustion of fuel when oxygen is sufficient. This stage melts the components with lower melting points in the glaze, causing the glaze to melt from the solid phase to the liquid phase. The reducing atmosphere used is the flame atmosphere under conditions of insufficient oxygen supply and incomplete combustion of fuel. At this time, a large amount of carbon monoxide is produced, which has a reducing effect. This stage is the color development stage of the glaze. The coloring element of the base glaze is copper. When fired in a reducing atmosphere, Jun porcelain exhibits its unique sapphire blue color.

[0022] Preferably, the body material of the unglazed body is incense ash body, which contains the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts silica fume, and 20 parts alkaline stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

[0023] Preferably, the preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 260-320 mesh by weight, injection molded, dried and fired to obtain the unglazed body.

[0024] Preferably, the preparation process of the blue base glaze slurry is as follows: the raw materials of the blue base glaze and water are mixed and ground to 350-400 mesh by weight, left to stand for 6-7 hours, and the water content of the slurry is adjusted to 47-52% to obtain the blue base glaze slurry.

[0025] Preferably, the preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 350-400 mesh by weight, left to stand for 6-7 hours, and the water content of the slurry is adjusted to 47-52% to obtain the glaze slurry.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The black gypsum in the base glaze contains a large amount of silicon, aluminum, and calcium, and is produced locally. The aluminum and calcium give the glaze a milky opaque quality, which is a unique sense of weight and grandeur of Jun porcelain produced locally.

[0028] 2. The base glaze contains a large amount of copper ore and trace amounts of manganese oxide. Under a reducing atmosphere, the blue-green hue of copper and the purplish-red hue of manganese blend together, giving the base glaze a blue hue. Under different light conditions and slight differences in content, it has a slight reddish glow, making the blue appear vivid, bright, and glossy, which contrasts sharply with the monotonous and dull color of traditional pigment blue glaze.

[0029] 3. The glaze contains some of the medicinal material and bone powder. The aluminum element in the medicinal material and the calcium element in the bone powder together give the glaze a milky and cloudy texture, increasing the thickness of the glaze color. In addition, the bone powder can increase the stability of the entire glaze fluid phase, helping the various components to be distributed more evenly, thereby making the glaze surface smooth, reducing the graininess, reducing pinholes, improving the overall jade-like texture of the glaze surface, and making Jun porcelain more unique in artistic effect.

[0030] 4. The glaze contains a small amount of tin oxide. Due to its low solubility in high-temperature melts and its difficulty in melting, it remains as fine suspended particles in the cooled glaze layer, giving the glaze a milky appearance. Moreover, the use of tin oxide in combination with other metallic coloring elements can make its color more stable and brighter.

[0031] 5. The glaze contains trace amounts of manganese oxide and iron oxide. Under a reducing atmosphere, these two elements give the milky glaze a slight orange tint. The glaze color blends better with the base glaze color. Compared to the dull color displayed by the combination of traditional pigment glazes, the glaze and base glaze colors blend together to present a richer and softer color.

[0032] 6. Calcite can lower the melting point of glaze and promote its melting. Adding calcite to glaze can improve its fluidity. Based on this, the weight of calcite in the base glaze of this invention is 4-9 parts, and the weight of calcite in the speckled glaze is 45-50 parts. This results in a significant difference in fluidity between the two. The base glaze has weaker fluidity and can adhere firmly to the ash body, while the speckled glaze has relatively stronger fluidity. In the molten state, it extends and flows downward along the surface of the base glaze, presenting a special water ripple pattern, which enhances the overall artistic beauty of Jun porcelain.

[0033] 7. Compared to traditional blue glazes, the base glaze formula of this invention eliminates cobalt. Cobalt, as a common coloring element in sapphire blue glazes, has the characteristic of stable color, but the resulting blue is relatively monotonous, light, and lacks vibrancy, and its integration with other hues is also poor. It is not very demanding in terms of atmosphere. In contrast, this invention proposes to use copper as the main coloring element. When copper and iron elements are combined under the ratio conditions described in this invention, along with different firing temperatures and reducing atmospheres, glazes of varying shades of blue can be fired. The colors are stable, serene, and beautiful, and are more aesthetically pleasing than traditional cobalt blue glazes. The glaze also has a jade-like texture. Because of this, different shades of blue will appear on the same piece, making the glaze seem to flow, which is more in line with the characteristic of Jun porcelain: "one color in the kiln, thousands of colors out of the kiln".

[0034] 8. The blue glaze described in this invention is fired once in the kiln, resulting in stable color. Compared with some Jun porcelain firing processes on the market that require double glazing and secondary firing to obtain a blue glaze, this process is simpler, saves energy, and has a higher yield.

[0035] In summary, the blue Tang Jun glaze and the process of firing Jun porcelain using it proposed in this invention have the advantages of stable color, significantly enhanced glaze brightness, and more controllable fluidity of the glaze in the high-temperature molten state after high-temperature firing through a specific glaze ratio. Attached Figure Description

[0036] Figure 1 The effect of Jun porcelain glaze color after firing according to the present invention Figure 1 ;

[0037] Figure 2 The effect of Jun porcelain glaze color after firing according to the present invention Figure 2 ;

[0038] Figure 3 The effect of Jun porcelain glaze color after firing according to the present invention Figure 3 . Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the content of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] This invention provides the following technical solution:

[0041] Example 1:

[0042] A blue Tang Jun glaze, comprising a blue base glaze and a speckled glaze applied to a bisque body, characterized in that: the blue base glaze comprises the following raw materials in parts by weight: 38 parts of feldspar, 4 parts of calcite, 22 parts of black gypsum, 24 parts of copper ore, and also includes 1 part of manganese oxide.

[0043] The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO.

[0044] Furthermore, the glaze contains the following raw materials in parts by weight: 45 parts calcite, 23 parts of the medicine, 12 parts quartz, 2 parts bone meal, 3 parts zinc oxide, 0.8 parts iron oxide, and 1 part tin oxide.

[0045] The medicine in question is Jiushan Benyao, which is a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

[0046] A process for firing Jun porcelain with blue Tang Jun glaze involves first immersing the unglazed body in a blue glaze slurry for 3 seconds to apply the glaze. After the blue glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to specific areas on the blue glaze surface. After drying, the piece is fired in a kiln to obtain blue Tang Jun porcelain. The process is characterized by:

[0047] The temperature changes inside the kiln during the firing process can be divided into the following stages:

[0048] S1: The furnace temperature rises from 20℃ to 100℃ within 30 minutes;

[0049] S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes;

[0050] S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes;

[0051] S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes;

[0052] S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes;

[0053] S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes;

[0054] S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain the Blue Tang Jun glaze.

[0055] In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

[0056] Furthermore, the body material of the unglazed porcelain is incense ash body, containing the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts silica fume, and 20 parts alkaline stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

[0057] Furthermore, the preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 260 mesh by weight, injection molded, dried and fired to obtain the unglazed body.

[0058] Furthermore, the preparation process of the blue base glaze slurry is as follows: the raw materials of the blue base glaze and water are mixed and ground to 350 mesh by weight, left to stand for 6 hours, and the water content of the slurry is adjusted to 47% to obtain the blue base glaze slurry.

[0059] Furthermore, the preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 350 mesh by weight, left to stand for 6 hours, and the water content of the slurry is adjusted to 47% to obtain the glaze slurry.

[0060] Example 2:

[0061] A blue Tang Jun glaze, comprising a blue base glaze and a speckled glaze applied to a bisque body, characterized in that: the blue base glaze comprises the following raw materials in parts by weight: 39 parts of feldspar, 5 parts of calcite, 23 parts of black gypsum, 25 parts of copper ore, and also includes 2 parts of manganese oxide.

[0062] The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO.

[0063] Furthermore, the glaze contains the following raw materials in parts by weight: 46 parts calcite, 24 parts of the medicine, 13 parts quartz, 3 parts bone meal, 4 parts zinc oxide, 1 part iron oxide, and 1.2 parts tin oxide.

[0064] The medicine in question is Jiushan Benyao, which is a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

[0065] A process for firing Jun porcelain with blue Tang Jun glaze involves first immersing the unglazed body in a blue glaze slurry for 4 seconds to apply the glaze. After the blue glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to specific areas on the blue glaze surface. After drying, the piece is fired in a kiln to obtain blue Tang Jun porcelain. The process is characterized by:

[0066] The temperature changes inside the kiln during the firing process can be divided into the following stages:

[0067] S1: The furnace temperature rises from 20℃ to 100℃ within 30 minutes;

[0068] S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes;

[0069] S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes;

[0070] S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes;

[0071] S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes;

[0072] S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes;

[0073] S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain the Blue Tang Jun glaze.

[0074] In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

[0075] Furthermore, the body material of the unglazed porcelain is incense ash body, containing the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts silica fume, and 20 parts alkaline stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

[0076] Furthermore, the preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 290 mesh by weight, injection molded, dried and fired to obtain the unglazed body.

[0077] Furthermore, the preparation process of the blue base glaze slurry is as follows: the raw materials of the blue base glaze and water are mixed and ground to 360 mesh by weight, left to stand for 6.2 hours, and the water content of the slurry is adjusted to 48% to obtain the blue base glaze slurry.

[0078] Furthermore, the preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 360 mesh by weight, left to stand for 6.2 hours, and the water content of the slurry is adjusted to 48% to obtain the glaze slurry.

[0079] Example 3:

[0080] A blue Tang Jun glaze, comprising a blue base glaze and a speckled glaze applied to a bisque body, characterized in that: the blue base glaze comprises the following raw materials in parts by weight: 40 parts of feldspar, 6 parts of calcite, 24 parts of black gypsum, 26 parts of copper ore, and also includes 3 parts of manganese oxide.

[0081] The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO.

[0082] Furthermore, the glaze contains the following raw materials in parts by weight: 47 parts calcite, 25 parts of the medicine, 14 parts quartz, 4 parts bone meal, 5 parts zinc oxide, 1.2 parts iron oxide, and 1.6 parts tin oxide.

[0083] The medicine in question is Jiushan Benyao, which is a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

[0084] A process for firing Jun porcelain with blue Tang Jun glaze involves first immersing the unglazed body in a blue glaze slurry for 5 seconds to apply the glaze. After the blue glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to specific areas on the blue glaze surface. After drying, the piece is fired in a kiln to obtain blue Tang Jun porcelain. The process is characterized by:

[0085] The temperature changes inside the kiln during the firing process can be divided into the following stages:

[0086] S1: The furnace temperature rises from 20℃ to 100℃ within 30 minutes;

[0087] S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes;

[0088] S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes;

[0089] S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes;

[0090] S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes;

[0091] S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes;

[0092] S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain the Blue Tang Jun glaze.

[0093] In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

[0094] Furthermore, the body material of the unglazed porcelain is incense ash body, containing the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts silica fume, and 20 parts alkaline stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

[0095] Furthermore, the preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 300 mesh by weight, injection molded, dried and bisque fired to obtain the unglazed body.

[0096] Furthermore, the preparation process of the blue base glaze slurry is as follows: the raw materials of the blue base glaze and water are mixed and ground to 370 mesh by weight, left to stand for 6.4 hours, and the water content of the slurry is adjusted to 49% to obtain the blue base glaze slurry.

[0097] Furthermore, the preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 370 mesh by weight, left to stand for 6.4 hours, and the water content of the slurry is adjusted to 49% to obtain the glaze slurry.

[0098] Example 4:

[0099] A blue Tang Jun glaze, comprising a blue base glaze and a speckled glaze applied to a bisque body, characterized in that: the blue base glaze comprises the following raw materials in parts by weight: 42 parts of feldspar, 8 parts of calcite, 26 parts of black gypsum, 28 parts of copper ore, and also includes 4 parts of manganese oxide.

[0100] The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO.

[0101] Furthermore, the glaze contains the following raw materials in parts by weight: 49 parts calcite, 27 parts of the medicine, 16 parts quartz, 6 parts bone meal, 7 parts zinc oxide, 1.8 parts iron oxide, and 2 parts tin oxide.

[0102] The medicine in question is Jiushan Benyao, which is a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

[0103] A process for firing Jun porcelain with blue Tang Jun glaze involves first immersing the unglazed body in a blue glaze slurry for 5 seconds to apply the glaze. After the blue glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to specific areas on the blue glaze surface. After drying, the piece is fired in a kiln to obtain blue Tang Jun porcelain. The process is characterized by:

[0104] The temperature changes inside the kiln during the firing process can be divided into the following stages:

[0105] Si: The furnace temperature rises from 20℃ to 100℃ within 30 minutes;

[0106] S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes;

[0107] S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes;

[0108] S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes;

[0109] S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes;

[0110] S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes;

[0111] S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain the Blue Tang Jun glaze.

[0112] In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

[0113] Furthermore, the body material of the unglazed porcelain is incense ash body, containing the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts silica fume, and 20 parts alkaline stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

[0114] Furthermore, the preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 310 mesh by weight, injection molded, dried and fired to obtain the unglazed body.

[0115] Furthermore, the preparation process of the blue base glaze slurry is as follows: the raw materials of the blue base glaze and water are mixed and ground to 390 mesh by weight, left to stand for 6.8 hours, and the water content of the slurry is adjusted to 51% to obtain the blue base glaze slurry.

[0116] Furthermore, the preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 390 mesh by weight, left to stand for 6.8 hours, and the water content of the slurry is adjusted to 51% to obtain the glaze slurry.

[0117] Example 5:

[0118] A blue Tang Jun glaze, comprising a blue base glaze and a speckled glaze applied to a bisque body, characterized in that: the blue base glaze comprises the following raw materials in parts by weight: 43 parts of feldspar, 9 parts of calcite, 27 parts of black gypsum, 29 parts of copper ore, and also includes 5 parts of manganese oxide.

[0119] The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO.

[0120] Furthermore, the glaze contains the following raw materials in parts by weight: 50 parts calcite, 28 parts of the medicine, 17 parts quartz, 7 parts bone meal, 8 parts zinc oxide, 2 parts iron oxide, and 2.2 parts tin oxide.

[0121] The medicine in question is Jiushan Benyao, which is a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

[0122] A process for firing Jun porcelain with blue Tang Jun glaze involves first immersing the unglazed body in a blue glaze slurry for 4 seconds to apply the glaze. After the blue glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to specific areas on the blue glaze surface. After drying, the piece is fired in a kiln to obtain blue Tang Jun porcelain. The process is characterized by:

[0123] The temperature changes inside the kiln during the firing process can be divided into the following stages:

[0124] S1: The furnace temperature rises from 20℃ to 100℃ within 30 minutes;

[0125] S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes;

[0126] S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes;

[0127] S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes;

[0128] S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes;

[0129] S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes;

[0130] S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain the Blue Tang Jun glaze.

[0131] In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

[0132] Furthermore, the body material of the unglazed porcelain is incense ash body, containing the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts silica fume, and 20 parts alkaline stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

[0133] Furthermore, the preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 320 mesh, injection molded, dried and fired to obtain the unglazed body.

[0134] Furthermore, the preparation process of the blue base glaze slurry is as follows: the raw materials of the blue base glaze and water are mixed and ground to 400 mesh by weight, left to stand for 7 hours, and the water content of the slurry is adjusted to 52% to obtain the blue base glaze slurry.

[0135] Furthermore, the preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 400 mesh by weight, left to stand for 7 hours, and the water content of the slurry is adjusted to 52% to obtain the glaze slurry.

[0136] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blue Tang Jun glaze, comprising a blue base glaze and speckled glaze applied to a bisque body, characterized in that: The blue glaze contains the following raw materials in parts by weight: 38-43 parts feldspar, 4-9 parts calcite, 22-27 parts black ore, 24-29 parts copper ore, and 1-5 parts manganese oxide. The black medicinal stone mentioned is a local black medicinal stone taken from Yezhugou, Huangdao Township, Jia County, Pingdingshan City, Henan Province, and its main components are SiO2, Al2O3 and CaO; The glaze contains the following raw materials in parts by weight: 45-50 parts calcite, 23-28 parts of this medicine, 12-17 parts quartz, 2-7 parts bone meal, 3-8 parts zinc oxide, 0.8-2 parts iron oxide, and 1-2.2 parts tin oxide. The medicine in question is Jiushan Benyao, a natural glaze mineral produced in Licun Village, Jiushan Township, Yuzhou.

2. Using the process of firing Jun porcelain with blue Tang Jun glaze as described in claim 1, firstly, the unglazed body is immersed in the blue base glaze slurry for 3-5 seconds for glazing. After the blue base glaze slurry adhering to the surface of the unglazed body dries, spot glaze slurry is applied to the blue base glaze in localized areas. After drying, it is placed in a kiln for firing, thus obtaining blue Tang Jun porcelain, characterized in that: The temperature changes inside the kiln during the firing process can be divided into the following stages: S1: The furnace temperature rises from 20℃ to 100℃ within 30 minutes; S2: The furnace temperature rises from 100℃ to 350℃ within 60 minutes; S3: The furnace temperature rises from 350℃ to 750℃ within 80 minutes; S4: The furnace temperature rises from 750℃ to 960℃ within 130 minutes; S5: The furnace temperature rises from 960℃ to 1150℃ within 100 minutes; S6: The furnace temperature rises from 1150℃ to 1260℃ within 240 minutes; S7: After the fire is stopped, allow it to cool naturally until the temperature inside the kiln drops to room temperature. Then open the kiln to obtain Blue Tang Jun porcelain. In the S1-S4 stage, the kiln gate is not completely closed, and there is sufficient oxygen for combustion. When the temperature inside the kiln reaches 960℃, the gate is closed, and the combustion atmosphere inside the kiln begins to switch to a reducing atmosphere. When the temperature reaches 1150℃, the kiln becomes a completely reducing atmosphere, and the glaze on the surface of Jun porcelain begins to show color. When the temperature reaches 1260℃, the color of the Jun porcelain glaze stabilizes.

3. The process for firing Jun porcelain as described in claim 2, characterized in that: The unglazed body is made of incense ash and contains the following raw materials in parts by weight: 50 parts kaolin, 10 parts clay, 15 parts quartz sand, 5 parts wollastonite, and 20 parts alkali stone. The kaolin and clay are both produced in Huangzhen, Jiaxian County.

4. The process for firing Jun porcelain as described in claim 3, characterized in that: The preparation process of the unglazed body is as follows: the unglazed body raw material and water are mixed and ground to 260-320 mesh by weight, injection molded, dried and fired to obtain the unglazed body.

5. The process for firing Jun porcelain as described in claim 2, characterized in that: The preparation process of the blue base glaze slurry is as follows: the raw materials of blue base glaze and water are mixed and ground to 350-400 mesh by weight, left to stand for 6-7 hours, and the water content of the slurry is adjusted to 47-52% to obtain the blue base glaze slurry.

6. The process for firing Jun porcelain as described in claim 2, characterized in that: The preparation process of the glaze slurry is as follows: the raw materials of the glaze and water are mixed and ground to 350-400 mesh by weight, left to stand for 6-7 hours, and the water content of the slurry is adjusted to 47-52% to obtain the glaze slurry.

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