Preparation process of high-temperature black pottery product

Abstract

The invention discloses a preparation process of a high-temperature black pottery product, which comprises the following steps: step 1, material selection and proportioning: selecting raw materials including red gum soil, kaolin, bentonite, silicate, ferric oxide, graphite and carbon; step 2, mixing mud to prepare mud; 3, blank making and forming; step 4, engraving and polishing; step 5, drying, namely airing the greenware again; 6, high-temperature firing is conducted, before firing, the temperature in the kiln is increased to 100 DEG C, after the kiln is dried for 4 h, the temperature in the kiln is gradually increased to 800 DEG C, the kiln is closed, and a kiln chamber is separated from air; compared with the prior art, the black pottery has the advantages that silicate can enable the black pottery to have better durability and durability, ferric oxide can enable the ceramic to have excellent rheology and processability, and the black pottery can obtain good plasticity and moldability; graphite and carbon are added to improve the conductivity and thermal conductivity of the black pottery, and the black pottery can be applied to electric appliances, stoves and other high-temperature applications.

Description

Technical Field

[0001] The invention relates to the technical field of black pottery product preparation, in particular to a preparation process of high-temperature black pottery products. Background Art

[0002] The craftsmanship of black pottery was more sophisticated, refined, delicate, and unique than that of primitive painted pottery. Thin-shell black pottery achieved the highest level of craftsmanship. The clay was screened, washed, and wheel-formed, resulting in a wall thickness of just 0.5 to 1 mm. This clay was then polished and fired at approximately 800°C, achieving a lustrous, jet-black finish, earning it the nickname "eggshell pottery." Black pottery from this period was crafted on a fast wheel. Plain polished surfaces were the most common, with fewer examples featuring decorative patterns, including string patterns, scratched patterns, and hollow patterns. Its elegant shapes, delicate string patterns, and refined, mellow texture exude elegance and alluring charm, making it a shining pearl in the history of Chinese ceramics.

[0003] The soil used for black pottery comes from the alluvial plain in the lower reaches of the Yellow River. The large particles of sediment carried by the Yellow River during its flow sink to the bottom of the river and are continuously washed to its lower reaches. Therefore, its deep soil is particularly fine, sand-free, sticky, and rich in various mineral elements. After the soil is taken out, it is dried, crushed, and filtered to make mud blanks. After kneading, coiling or throwing, it is repeatedly pressed with tools such as bamboo knives and ox horn pieces to increase the density of the pottery surface and make it smooth as a mirror; then it is carved and decorated, and finally put into the kiln for firing.

[0004] However, traditional black pottery uses a single material and has a low firing temperature. The product has high water absorption, low density, insufficient hardness, is extremely easy to break, and has a narrow range of applications.

[0005] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a preparation process for high-temperature black pottery products. The addition of silicates can provide hardness and corrosion resistance. Silicates can make black pottery more durable and long-lasting. Iron oxide is reduced at high temperature under a special atmosphere during the production of black pottery, which can make the ceramic have excellent rheological and processing properties, and can make black pottery obtain good plasticity and moldability. The addition of graphite and carbon can improve the electrical conductivity and thermal conductivity of black pottery, and can be used in electrical appliances, stoves and other high-temperature applications. In summary, the black pottery products of this application have high strength, heat resistance, waterproofness, and wear resistance. In different application scenarios, black pottery can provide good performance and reliable performance guarantees.

[0007] In order to solve the above problems, the technical solution of the present invention is a preparation process of high-temperature black pottery products, which includes the following steps:

[0008] Step 1, selecting and preparing materials, selecting raw materials including red clay, kaolin, bentonite, silicate and iron oxide, graphite, and carbon, wherein the raw materials include the following components by weight: 50-70 parts of red clay, 30-50 parts of kaolin, 10-20 parts of bentonite, 1-5 parts of silicate, 0.5-0.7 parts of iron oxide, 1-5 parts of graphite, and 2-10 parts of carbon;

[0009] Step 2: Mixing and making mud. The raw materials in step 1 are air-dried, air-frozen, washed, and deposited. The pigments are ground and sieved by a grinder to ensure that the raw material particles are uniform in size and density. The raw materials are mixed, pounded, kneaded, and the air in the raw materials is expelled.

[0010] Step 3: Blank making and shaping: After manual throwing and shaping, the finished blank is placed in a cool place at 10℃±2 for 48 hours, and then trimmed and polished with a grinding tool and patterned;

[0011] Step 4: Carve and polish. Carve patterns and hollow effects according to the design and install accessories. Then use smooth shells or pebbles to repeatedly press the surface.

[0012] Step 5: Drying: Dry the pottery again;

[0013] Step 6: High temperature firing. Before firing, heat the temperature inside the kiln to 100°C. After baking the kiln for 4 hours, the temperature inside the kiln gradually rises to 800°C. Close the kiln and isolate the kiln chamber from the air.

[0014] Furthermore, in step 1, the red clay is selected from the impact plain of the middle and lower reaches of the Yellow River. The red clay is fine, sand-free and sticky.

[0015] Furthermore, in step 2, during the kneading process, the raw materials are kneaded evenly and cooked by spiral rotation, and the fine impurities left in the raw materials are sorted for a second time to remove the fine impurities.

[0016] Furthermore, in step three, during the blank making process, after the turntable is evenly rotated, a metal scraper or other tool is used to evenly trim the shape of the surface of the blank and trim the interior.

[0017] Furthermore, in step six, at a later stage after firing, water is slowly added to the kiln top at 400°C-600°C to extinguish the charcoal and generate thick smoke, and the kiln is smoked for 10 hours. When the firing temperature drops to 100°C, the kiln is opened and the black pottery products are taken out.

[0018] Furthermore, after firing is completed, polishing is carried out. A soft brush is used to brush the pottery blank, and then a hard plastic tube is used to rub and polish the surface of the black pottery product; finally, goose eggs are used to rub the wall of the black pottery product.

[0019] The advantages of the present invention compared with the existing technology are:

[0020] 1. Adding silicates to the raw materials of the present invention can provide hardness and corrosion resistance. Silicates can make black pottery more durable and long-lasting. The high-temperature reduction of iron oxide in a special atmosphere during the production of black pottery can make the ceramic have excellent rheological and processing properties, and can make the black pottery have good plasticity and moldability. Adding graphite and carbon can improve the electrical conductivity and thermal conductivity of black pottery, and can be used in electrical appliances, stoves and other high-temperature applications. In summary, the black pottery products of this application have high strength, heat resistance, waterproofness, and wear resistance. In different application scenarios, black pottery can provide good performance and reliable performance guarantees. DETAILED DESCRIPTION

[0021] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention.

[0022] A preparation process for high-temperature black pottery products comprises the following steps:

[0023] Step 1: Select and prepare materials. The raw materials selected include red clay, kaolin, bentonite, silicate, iron oxide, graphite, and carbon. The raw materials include the following components by weight: 50-70 parts of red clay, 30-50 parts of kaolin, 10-20 parts of bentonite, 1-5 parts of silicate, 0.5-0.7 parts of iron oxide, 1-5 parts of graphite, and 2-10 parts of carbon. The red clay is selected from the impact plain of the middle and lower reaches of the Yellow River. The red clay is fine, sand-free, and sticky.

[0024] Step 2: Mix and make the clay. The raw materials in step 1 are air-dried, air-frozen, washed, and deposited. The pigments are ground and sieved through a grinder to ensure that the raw material particles are uniform in size and density. The raw materials are mixed, turned over, and kneaded to expel the air in the raw materials. During the kneading process, the raw materials are kneaded in a spiral shape to make them uniform and cooked. The fine impurities left in the raw materials are sorted for a second time to remove the fine impurities and ensure the quality of the clay.

[0025] Step 3: Blank making and shaping. After manual throwing and shaping, the finished blank is placed in a cool place at 10℃±2 for 48 hours, and then trimmed. A grinding tool is used for preliminary polishing and pattern drawing. During the blank making process, the artist rotates the turntable evenly, and uses tools such as metal scrapers to evenly shape the surface of the pottery blank and trim the inside.

[0026] Step 4: Carve and polish. Carve patterns and hollow effects according to the design and install accessories. Then use smooth shells or pebbles to repeatedly press the surface to make the entire blank smooth and lustrous with a strong gloss.

[0027] Step 5: Drying: Dry the pottery again;

[0028] Step 6: High-temperature firing. Before firing, the kiln temperature is heated to 100°C. This further dries the pottery to prevent cracks during firing. After four hours of kiln heating, the temperature is gradually raised to 800°C. The kiln is then sealed and airtight. Red clay is sourced from the alluvial plains of the middle and lower reaches of the Yellow River. It is fine, sand-free, and sticky.

[0029] During the final stages of firing, water is slowly added to the kiln roof at 400-600°C to extinguish the charcoal, producing thick smoke. The kiln then fires for 10 hours. The carbon molecules in the smoke slowly penetrate the pottery, turning it jet black from the inside out. Once the firing temperature drops to 100°C, the kiln can be opened and the black pottery can be removed. After firing, the pottery is polished by brushing the blank with a soft brush and then rubbing the surface of the black pottery with a hard plastic tube. Finally, goose eggs are used to rub the pottery's walls, giving it a dark, lustrous finish and enhancing its beauty.

[0030] The addition of silicates to the raw materials of the present invention can provide hardness and corrosion resistance. Silicates can make black pottery more durable and long-lasting. The high-temperature reduction of iron oxide in a special atmosphere during the production of black pottery can make the ceramic have excellent rheological and processing properties, and can make the black pottery have good plasticity and moldability. The addition of graphite and carbon can improve the electrical conductivity and thermal conductivity of black pottery, and can be used in electrical appliances, stoves and other high-temperature applications. In summary, the black pottery products of this application have high strength, heat resistance, waterproofness, and wear resistance. In different application scenarios, black pottery can provide good performance and reliable performance guarantees.

[0031] The above description of the present invention and its embodiments is non-limiting. In short, if a person skilled in the art is inspired by the above description and designs a similar structure and embodiment to the technical solution without departing from the purpose of the present invention, they should fall within the scope of protection of the present invention.

Claims

1. A process for preparing high-temperature black pottery products, characterized in that: The following steps are involved: Step 1, selecting and preparing materials, selecting raw materials including red clay, kaolin, bentonite, silicate and iron oxide, graphite, and carbon, wherein the raw materials include the following components by weight: 50-70 parts of red clay, 30-50 parts of kaolin, 10-20 parts of bentonite, 1-5 parts of silicate, 0.5-0.7 parts of iron oxide, 1-5 parts of graphite, and 2-10 parts of carbon; Step 2: Mixing and making mud. The raw materials in step 1 are dried, air-frozen, washed, and deposited. The pigment is ground and sieved by a grinder to ensure that the raw material particles are uniform in size and density. The raw materials are mixed, pounded, kneaded and pressed to expel the air from the raw materials; Step 3: Blank making and shaping: After manual throwing and shaping, the finished blank is placed in a cool place at 10℃±2 for 48 hours, and then trimmed and polished with a grinding tool and patterned; Step 4: Carve and polish. Carve patterns and hollow effects according to the design and install accessories. Then use smooth shells or pebbles to repeatedly press the surface. Step 5: Drying: Dry the pottery again; Step 6: High temperature firing. Before firing, heat the temperature inside the kiln to 100°C. After baking the kiln for 4 hours, the temperature inside the kiln gradually rises to 800°C. Close the kiln and isolate the kiln chamber from the air.

2. The process for preparing a high-temperature black pottery product according to claim 1, characterized in that: In step 1, the red clay is selected from the impact plain of the middle and lower reaches of the Yellow River. The red clay is fine, sand-free and sticky.

3. The process for preparing a high-temperature black pottery product according to claim 1, characterized in that: In step 2, during the kneading process, the raw materials are kneaded evenly and cooked by spiral rotation. The fine impurities left by the raw materials are sorted for the second time to remove the fine impurities.

4. The process for preparing a high-temperature black pottery product according to claim 1, characterized in that: In step three, during the blank making process, after the turntable is evenly rotated, a metal scraper or other tool is used to evenly trim the shape of the surface of the blank and trim the interior.

5. The process for preparing a high-temperature black pottery product according to claim 1, characterized in that: In step six, at the end of the firing period, water is slowly added to the kiln top at 400-600°C to extinguish the charcoal and generate thick smoke, and the kiln is smoked for 10 hours. When the firing temperature drops to 100°C, the kiln is opened and the black pottery products are taken out.

6. The process for preparing a high-temperature black pottery product according to claim 5, characterized in that: After firing, polishing is carried out. Use a soft brush to brush the pottery blank, and then use a hard plastic tube to rub and polish the surface of the black pottery product. Finally, rub the wall of the black pottery with goose eggs.