Method for producing environmentally friendly underglaze-stained kiln-changed glaze ceramics

Abstract

The present invention relates to the field of ceramics and their preparation methods, and more particularly to a method for producing environmentally friendly underglaze-patterned kiln-changed glaze ceramics. The environmentally friendly underglaze-patterned kiln-changed glaze ceramics include a base container and a top glaze covering the base container. The top glazes include, from bottom to top, gneiss glaze, plant ash glaze, and kelp ash glaze. The glaze surface undergoes kiln changes during the firing process. After firing, the base color is a yellow-green rhytoid glaze, with craters and cracks formed on the glaze surface. The inner wall is covered with reddish-brown or dark brown plant patterns, and the interior of the container is covered with a deep-sea glaze layer with blue and yellow interwoven patterns. The overall glaze effect is unique. The base glaze uses natural and environmentally friendly materials such as kelp, seaweed, grain straw ash, nettle ash, and paper pulp, as well as recycled broken glass as raw materials, thereby reducing pollution and improving waste utilization.

Description

Technical Field

[0001] The present invention relates to the field of ceramics and preparation methods thereof, and in particular to a method for preparing environmentally friendly underglaze spotted kiln-changed glaze ceramics. Background Art

[0002] Kiln-changed glaze, as the name suggests, is an unexpected glaze effect that occurs during the firing process. Due to the presence of various coloring elements in the kiln, through oxidation or reduction, porcelain may exhibit unexpected glaze effects after leaving the kiln. Because kiln-changed glazes appear by chance and have unique forms, and ancient people were unaware of their principles, only knowing that they resulted from the changes in the kiln firing process, they were given the name "kiln-changed glaze." Traditional kiln-changed glazes generally fall into a few existing categories, such as Yaobian Tenmoku, Youdi Tenmoku, Rabbit Hair Tenmoku, Tea Dust, Rust Flower, and Red Tenmoku. Since the advent of modern production, kiln-changed glazes have rarely seen new techniques or formulations innovated to offer new styles, colors, and textures that differ from traditional kiln-changed glazes. This proposal was conceived with this in mind. Summary of the Invention

[0003] An object of the present invention is to solve at least the above-mentioned problems by a method for producing environmentally friendly underglaze-spotted kiln-changed glaze ceramics.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: environmentally friendly underglaze spotted kiln-changed glaze ceramics, including a green container and a surface glaze covering the green container, and the surface glaze includes gneiss glaze, plant ash glaze and kelp ash glaze from bottom to top.

[0005] Furthermore, the raw materials of the gneissic glaze include the following components in parts by weight: 10-12 parts of gneiss, 45-55 parts of china clay, 20-30 parts of silicon dioxide, 20-25 parts of magnesia feldspar, and 4-6 parts of limestone.

[0006] Furthermore, the raw materials of the plant ash glaze include the following components in parts by weight: 3-5 parts of cereal straw ash, 1-2 parts of nettle ash, 50-60 parts of porcelain clay, 20-30 parts of silica, 25-30 parts of magnesia feldspar, 8-12 parts of limestone, and 4-6 parts of aluminum oxide.

[0007] Furthermore, the raw materials of the kelp ash glaze include the following components in parts by weight: 2-3 parts of kelp ash, 2-3 parts of seaweed ash, 50-55 parts of porcelain clay, 15-20 parts of silicon dioxide, and 25-30 parts of feldspar.

[0008] Furthermore, plant patterns are provided on the inner wall and the outer wall of the blank container.

[0009] Furthermore, the bottom of the green container is covered with a deep-sea glaze layer, and the raw materials of the deep-sea glaze layer include the following components in parts by weight: 3-4 parts of cullet, 1-1.5 parts of dark blue glaze blocks and 1.5-1.8 parts of lemon yellow frit.

[0010] Furthermore, the raw materials of the dark blue glaze block, calculated in parts by weight, include the following components: 35-40 parts of kaolin, 15-20 parts of wollastonite, 15-20 parts of silicon dioxide, 18-22 parts of orthoclase, 3-4 parts of light rutile, 1-2 parts of copper carbonate, and 1-2 parts of cobalt carbonate; the raw materials of the lemon yellow frit, calculated in parts by weight, include the following components: 20-30 parts of wollastonite, 50-60 parts of borate, 30-40 parts of albite, 2-3 parts of copper carbonate, 1-2 parts of manganese dioxide, and 2-3 parts of bentonite.

[0011] Furthermore, the raw materials of the green container include the following components in parts by weight: 4-5 parts of perlite, 4-6 parts of pulp, 50-60 parts of clay, 4-6 parts of china clay, 15-20 parts of feldspar, and 10-15 parts of quartz.

[0012] The method for producing the environmentally friendly underglaze-stained kiln-changed glaze ceramics comprises the following steps:

[0013] Step a, forming a green body container;

[0014] Step b, adhering dry seaweed to the inner surface of the blank container;

[0015] Step c, applying gneiss glaze, nettle ash glaze and kelp ash glaze in sequence on the inner and outer walls of the green container;

[0016] Step d: first place a layer of cullet at the bottom of the green container, and then lay dark blue glaze blocks and lemon yellow frit on the cullet;

[0017] Step e: firing in a kiln.

[0018] Furthermore, in step a, the blank container is formed by roll forming, and the blank container is an open container, and its inner diameter gradually increases from bottom to top;

[0019] In step b, the green body container is further placed in the mold after roll forming, the dry seaweed is adhered to a part of the inner wall of the green body container by means of glue, and then slowly rolled by a rolling head to press the seaweed into the inner wall of the green body container, and then dried to form. The method for preparing the dry seaweed is as follows: pre-dried seaweed is placed in an aqueous solution of ferric chloride and soaked for 3-4 hours, wherein the iron-containing solution is an aqueous solution of ferric chloride with a solubility of 35-40g / 100ml, and then the foamed seaweed is taken out and dried again to obtain the dry seaweed.

[0020] From the above description, it can be seen that the method for producing environmentally friendly underglaze spotted kiln-changed glaze ceramics provided by the present invention has the following beneficial effects: the glaze surface of the present invention undergoes kiln changes during the firing process, and after firing, the glaze surface is yellow-green flow glaze as the base color, craters and cracks are formed on the glaze surface, and the inner wall is covered with reddish-brown or dark brown plant patterns. The interior of the container is covered with a layer of deep-sea glaze with blue and yellow interwoven patterns. The overall glaze effect is unique, and the body glaze uses natural and environmentally friendly materials such as kelp, seaweed, grain straw ash, nettle ash, and paper pulp, and recycled broken glass is used as raw materials, etc., which reduces pollution and improves waste utilization. DETAILED DESCRIPTION

[0021] The present invention is further described below through specific embodiments.

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] The environmentally friendly underglaze spotted kiln-changed glaze ceramics of the present invention include a body container and a surface glaze covering the body container, wherein the surface glaze includes gneiss glaze, plant ash glaze and kelp ash glaze in order from bottom to top.

[0024] The raw materials for gneiss glaze, measured by weight, include the following: 10-12 parts gneiss, 45-55 parts porcelain clay, 20-30 parts silica, 20-25 parts magnesia feldspar, and 4-6 parts limestone. Gneiss glaze serves as a base glaze for the top glaze, improving the bond between the body and glaze.

[0025] The raw materials for the plant ash glaze, measured in parts by weight, include the following: 3-5 parts of grain straw ash, 1-2 parts of nettle ash, 50-60 parts of porcelain clay, 20-30 parts of silica, 25-30 parts of magnesia feldspar, 8-12 parts of limestone, and 4-6 parts of aluminum oxide. The plant ash glaze contains a solvent, which improves the glaze's fluidity on the surface of the body, creating a hammer-like effect. The iron content of the plant ash glaze imparts a yellow-green hue to the glaze. A small amount of aluminum oxide is added to balance the fluidity, preventing excessive fluidity from thinning the glaze or exposing parts of the body.

[0026] The raw materials for kelp ash glaze, measured by weight, include the following: 2-3 parts kelp ash, 2-3 parts seaweed ash, 50-55 parts porcelain clay, 15-20 parts silica, and 25-30 parts feldspar. The kelp ash glaze, which also contains a solvent, is highly fluid and flows freely during firing, producing green or yellow streaks. Kelp ash and seaweed ash contain soluble salts, which create cratering and crackle effects in areas where they accumulate on the glaze surface. The multi-layered glazing creates a rich, layered finish after firing.

[0027] The inner and outer walls of the vessel are decorated with plant patterns, which are formed by the seaweed covering the body and the glaze after being fired in the kiln.

[0028] The bottom of the green container is covered with a deep-sea glaze layer. The raw materials of the deep-sea glaze layer include the following components in parts by weight: 3-4 parts of broken glass, 1-1.5 parts of dark blue glaze blocks and 1.5-1.8 parts of lemon yellow frit.

[0029] The raw materials for the dark blue glaze block, measured in parts by weight, include the following: 35-40 parts kaolin, 15-20 parts wollastonite, 15-20 parts silica, 18-22 parts orthoclase, 3-4 parts light rutile, 1-2 parts copper carbonate, and 1-2 parts cobalt carbonate. The raw materials for the lemon yellow frit, measured in parts by weight, include the following: 20-30 parts wollastonite, 50-60 parts borate, 30-40 parts albite, 2-3 parts copper carbonate, 1-2 parts manganese dioxide, and 2-3 parts bentonite. Both the dark blue and lemon yellow glaze blocks are made by melting their raw materials at high temperatures, then cooling and crushing them. The dark blue glaze block is dark blue, while the lemon yellow block is lemon yellow. These three materials are added to the bottom of the base container in blocks. After fusion and firing, they fail to fully fuse due to fluidity issues, resulting in a deep-sea glaze layer with interwoven blue and yellow patterns.

[0030] The raw materials for the green container, measured in parts by weight, include the following components: 4-5 parts perlite, 4-6 parts paper pulp, 50-60 parts clay, 4-6 parts china clay, 15-20 parts feldspar, and 10-15 parts quartz. If fine clay or china clay is used to make a thin green body, salt in the glaze may enter the green body through both sides, causing it to crack. In contrast, the green container of the present invention uses a formulation similar to stoneware, with a high specific gravity of clay and a low specific gravity of china clay. While maintaining a certain porosity and water absorption capacity, it also has high strength and good thermal stability, effectively preventing cracking caused by salt in the kelp ash glaze. The perlite and paper pulp clay serve to increase the porosity of the green container.

[0031] The method for producing environmentally friendly underglaze-stained kiln-changed glaze ceramics comprises the following steps:

[0032] Step a, forming a green body container;

[0033] Step b, adhering dry seaweed to the inner surface of the blank container;

[0034] Step c, applying gneiss glaze, nettle ash glaze and kelp ash glaze in sequence on the inner and outer walls of the green container;

[0035] Step d: First place a layer of broken glass at the bottom of the green container, and then lay dark blue glaze blocks and lemon yellow frit on the broken glass; the dark blue glaze blocks and lemon yellow frit are both made by melting their raw materials at high temperature and then cooling and crushing them. The dark blue glaze blocks are dark blue in color, and the lemon yellow blocks are lemon yellow in color. Therefore, after the three materials are fused and fired at the bottom of the green container, a deep-sea glaze layer with blue and yellow interwoven patterns is formed.

[0036] Step e: Firing in a kiln. The firing temperature is 1150-1200 degrees Celsius, and the holding time at the firing temperature is 1-2 hours. During the firing process, the glaze surface undergoes kiln changes. After firing, the glaze surface has a yellow-green rhytoid glaze as the base color, with craters and cracks formed on the glaze surface. The inner wall is covered with reddish-brown or dark brown plant patterns, and the interior of the container is covered with a layer of deep-sea glaze with blue and yellow interwoven patterns. The overall glaze effect is unique. The body glaze uses natural and environmentally friendly materials such as kelp, seaweed, grain straw ash, nettle ash, and paper pulp, as well as recycled broken glass as raw materials, thereby reducing pollution and improving waste utilization.

[0037] In step a, the green container is roll-formed, and the green container is an open container, and its inner diameter gradually increases from bottom to top;

[0038] In step b, the green body container is continued to be placed in the mold after roll forming, the dry seaweed is adhered to the inner wall of the green body container by viscose, and then slowly rolled by a rolling head to press the seaweed into the inner wall of the green body container, and then dried to form; the preparation method of dry seaweed is: select thinner dry seaweed, place the pre-dried seaweed in an aqueous solution of ferric chloride and soak it for 3-4 hours, the iron-containing solution is an aqueous solution of ferric chloride with a solubility of 35-40g / 100ml, then take out the foamed seaweed, at this time the seaweed absorbs the aqueous solution of ferric chloride, and then re-dry to obtain dry seaweed. By soaking the dried seaweed, it can fully absorb the ferric chloride solution, and then it will be attached to the inner wall of the blank after re-drying. During the firing process, the ferric chloride in the dry seaweed penetrates the blank to the outer wall, and the ferric chloride appears brick red. However, seaweed is an organic matter and is mostly decomposed during the firing process. Therefore, the location of the seaweed on the inner wall of the blank appears as reddish-brown or dark brown, inward-concave plant patterns. Part of the ferric chloride is enriched and penetrates the blank container to the outer wall. Due to the penetration of ferric chloride, local plant patterns or spots also appear on the outer wall.

[0039] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. Environmentally friendly underglaze kiln-changed glaze ceramics, characterized by: The invention comprises a body container and a top glaze covering the body container, wherein the top glaze comprises, from bottom to top, gneiss glaze, plant ash glaze and kelp ash glaze; the raw materials of the gneiss glaze comprise, in parts by weight, the following components: 10-12 parts of gneiss, 45-55 parts of china clay, 20-30 parts of silica, 20-25 parts of magnesia feldspar and 4-6 parts of limestone; the raw materials of the plant ash glaze comprise, in parts by weight, the following components: 3-5 parts of cereal straw ash, 1-2 parts of nettle ash, 50-60 parts of china clay, 20-30 parts of silica, 25-30 parts of magnesia feldspar, 8-12 parts of limestone and 4-6 parts of alumina; the raw materials of the kelp ash glaze comprise, in parts by weight, the following components: 2-3 parts of kelp ash, 2-3 parts of seaweed ash, 50-55 parts of china clay, 15-20 parts of silica and 25-30 parts of feldspar.

2. The environmentally friendly underglaze-spotted kiln-changed glaze ceramic according to claim 1, characterized in that: The inner wall and the outer wall of the blank container are provided with plant patterns.

3. The environmentally friendly underglaze-spotted kiln-changed glaze ceramic according to claim 1, characterized in that: The bottom of the green body container is covered with a deep-sea glaze layer. The raw materials of the deep-sea glaze layer include the following components in parts by weight: 3-4 parts of cullet, 1-1.5 parts of dark blue glaze blocks and 1.5-1.8 parts of lemon yellow frit.

4. The environmentally friendly underglaze-spotted kiln-changed glaze ceramic according to claim 3, characterized in that: The raw materials of the dark blue glaze block, calculated in parts by weight, include the following components: 35-40 parts of kaolin, 15-20 parts of wollastonite, 15-20 parts of silicon dioxide, 18-22 parts of orthoclase, 3-4 parts of light rutile, 1-2 parts of copper carbonate, and 1-2 parts of cobalt carbonate; the raw materials of the lemon yellow frit, calculated in parts by weight, include the following components: 20-30 parts of wollastonite, 50-60 parts of borate, 30-40 parts of albite, 2-3 parts of copper carbonate, 1-2 parts of manganese dioxide, and 2-3 parts of bentonite.

5. The environmentally friendly underglaze-spotted kiln-changed glaze ceramic according to claim 1, characterized in that: The raw materials of the green container include the following components in parts by weight: 4-5 parts of perlite, 4-6 parts of pulp, 50-60 parts of clay, 4-6 parts of porcelain clay, 15-20 parts of feldspar, and 10-15 parts of quartz.

6. The method for producing environmentally friendly underglaze-spotted kiln-changed glaze ceramics according to any one of claims 1 to 5, characterized in that: The steps include: Step a, forming a green body container; Step b, adhering dry seaweed to the inner surface of the blank container; Step c, applying gneiss glaze, nettle ash glaze and kelp ash glaze in sequence on the inner and outer walls of the green container; Step d: first place a layer of cullet at the bottom of the green container, and then lay dark blue glaze blocks and lemon yellow frit on the cullet; Step e: firing in a kiln.

7. The method for producing environmentally friendly underglaze-spotted kiln-changed glaze ceramics according to claim 6, characterized in that: In step a, the blank container is roll-formed, and the blank container is an open container, the inner diameter of which gradually increases from bottom to top; In step b, the green container is further placed in the mold after roll-forming, and the dry seaweed is adhered to a part of the inner wall of the green container by means of glue. The seaweed is then slowly rolled by a rolling head to press the seaweed into the inner wall of the green container, and then dried to form the green container. The dry seaweed preparation method comprises: placing the pre-dried seaweed in an iron-containing solution and soaking it for 3-4 hours. The iron-containing solution is an aqueous solution of ferric chloride with a solubility of 35-40g / 100ml, then taking out the foamed seaweed and re-drying it to obtain the dry seaweed.