Ceramic manufacturing method including vitrified speckled crystals

Abstract

A method for manufacturing ceramics comprising vitrified spot crystals is disclosed. The method for manufacturing ceramics according to the present invention comprises: a first glaze application step (S10) of applying a crystalline glaze to the surface of a body formed by bisque firing of a ceramic-shaped vessel; a second glaze application step (S20) of applying a color-developing glaze to the surface of a body before the crystalline glaze applied in the first step dries; a first firing step (S30) of inducing crystal formation on the surface of a body by firing the body at a temperature of 800 to 1000°C for 2 to 3 hours; and a second firing step (S40) of vitrifying the glaze by raising the temperature to 1240 to 1260°C and firing for 14 to 18 hours once crystals are formed on the surface of the body through the first firing step (S30). and after the second firing step (S40) is completed, the inside of the kiln is sealed and then slowly cooled for 20 to 28 hours to complete the finished ceramic product (200), including a cooling step (S50).

Description

Technology Field

[0001] The present invention relates to a method for manufacturing ceramics, and more specifically, to a method for manufacturing ceramics including vitrified spot crystals, wherein a body coated with a crystalline glaze and a colored glaze is fired to produce spot crystals during the first firing process and vitrified during the second firing process to complete a ceramic with aesthetically pleasing crystals. Background Technology

[0002] Generally, shapes or patterns are formed on the surface of ceramics in various ways. For example, there is a general method of manufacturing ceramics such as inlaid celadon, in which a pattern is imprinted on the surface of the ceramic and then glazed, and another method involves mixing various glaze materials to create three-dimensional patterns on the ceramics.

[0003] Recently, there is a method for creating patterns on household ceramics (bowls, teapots, tea sets, etc.) by specifying the composition of the glaze. Regarding these compositions, common patterns include peony motifs and tree shapes using talc or limestone.

[0004] In addition, there is a method of creating irregular patterns on pottery by limiting the firing temperature to a specific temperature and setting a specific temperature during the cooling process, utilizing cracks in the pottery or glaze. Prior art literature

[0005] Published Patent Application No. 10-2023-0030199 (Date of publication: March 6, 2023) The problem to be solved

[0006] The present invention was devised to solve the aforementioned problems and aims to provide a method for manufacturing ceramics containing vitrified spot crystals, wherein a body coated with a crystalline glaze and a colored glaze sequentially on its surface is fired to produce spot crystals during the first firing process and vitrified during the second firing process to complete the ceramics having aesthetically pleasing crystals. means of solving the problem

[0007] A method for manufacturing a ceramic having blue crystals according to the present invention for achieving the above-mentioned purpose comprises: a first glaze application step (S10) of applying a crystal glaze to the surface of a body formed by bisque firing a vessel made in the shape of a ceramic; a second glaze application step (S20) of applying a color-developing glaze to the surface of a body before the crystal glaze applied in the first step dries; a first firing step (S30) of inducing crystal formation on the surface of a body by firing the body at a temperature of 800 to 1000°C for 2 to 3 hours; a second firing step (S40) of vitrifying the glaze by raising the temperature to 1240 to 1260°C and firing for 14 to 18 hours once crystals are formed on the surface of the body through the first firing step (S30); and a cooling step (S50) of completing the ceramic as a finished product by sealing the inside of the kiln and slowly cooling it for 20 to 28 hours after the second firing step (S40) is completed. It is composed of,

[0008] A method for manufacturing ceramic having blue crystals, characterized in that the above-mentioned crystal glaze is formed by mixing 200 to 220 parts by weight of feldspar, 35 to 37 parts by weight of limestone, 70 to 75 parts by weight of silica, 22 to 26 parts by weight of barium, 35 to 37 parts by weight of clay, 9 to 11 parts by weight of zircon, 5 to 7 parts by weight of stone oxide, 11 to 13 parts by weight of lithium, 5 to 6 parts by weight of zinc, and 3 to 5 parts by weight of bone ash with 150 to 170 parts by weight of water.

[0009] In addition, the above-mentioned colored glaze is characterized by being formed by mixing 260 to 300 parts by weight of feldspar, 126 to 130 parts by weight of kaolin, 150 to 155 parts by weight of silica, 102 to 106 parts by weight of barium, 46 to 50 parts by weight of clay, 10 to 15 parts by weight of cobalt, 5 to 7 parts by weight of iron, 55 to 57 parts by weight of zinc, 7 to 9 parts by weight of oxide, 78 to 82 parts by weight of titanium, and 7 to 9 parts by weight of lithium with 150 to 170 parts by weight of water. Effects of the invention

[0010] As described above, according to the method for manufacturing ceramics having blue crystals according to the present invention, by firing a body on which a crystal glaze and a color-developing glaze are sequentially applied to the surface, spot crystals are expressed during the first firing process and vitrified during the second firing process, thereby having the effect of completing a ceramic with aesthetically pleasing crystals. Brief explanation of the drawing

[0011] FIG. 1 is a block diagram of a method for manufacturing ceramic having blue crystals according to an embodiment of the present invention. FIG. 2 is a photographic drawing of a ceramic produced by the method of manufacturing ceramics having blue crystals as illustrated in FIG. 1. Specific details for implementing the invention

[0012] Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In labeling the components of each drawing with reference numerals, the same components are indicated by the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0013] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by these terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected, combined, or connected to the other component, but that another component may also be "connected," "combined," or "connected" between the component and the other component.

[0014] FIGS. 1 and FIGS. 2 illustrate a method for manufacturing ceramics having blue crystals according to an embodiment of the present invention. FIGS. 1 is a block diagram of a method for manufacturing ceramics having blue crystals according to an embodiment of the present invention, and FIGS. 2 is a photographic drawing of a ceramic produced by the method for manufacturing ceramics having blue crystals shown in FIGS. 1.

[0015] As illustrated in the drawing above, a method for manufacturing a ceramic having blue crystals according to an embodiment of the present invention (100) includes a first glaze application step (S10), a second glaze application step (S20), a first firing step (S30), a second firing step (S40), and a cooling step (S50).

[0016] As illustrated in FIG. 1, the first glazing step (S10) is a process of applying a crystalline glaze to the surface of a body formed by bisque firing of a ceramic-shaped vessel.

[0017] Typically, to produce ceramics, a piece formed into a ceramic shape is bisque-fired at approximately 800°C to create a clay body. Since this process of creating a clay body is a standard procedure for making ceramics, a detailed explanation thereof will be omitted.

[0018] When the body is prepared as described above, a crystalline glaze is applied to the surface as a first step. The crystalline glaze applied in this way is allowed to melt during the first firing step described later and manifest as spot crystals.

[0019] Here, the crystal glaze is formed by mixing 200 to 220 parts by weight of feldspar, 35 to 37 parts by weight of limestone, 70 to 75 parts by weight of silica, 22 to 26 parts by weight of barium, 35 to 37 parts by weight of clay, 9 to 11 parts by weight of zircon, 5 to 7 parts by weight of stone oxide, 11 to 13 parts by weight of lithium, 5 to 6 parts by weight of zinc, and 3 to 5 parts by weight of bone ash with 150 to 170 parts by weight of water.

[0020] The compositions other than the water mentioned above are formed in the form of dry powder and mixed evenly with water to produce a crystalline glaze. Feldspar, a major component of this crystalline glaze, reacts with silica to form a vitreous substance, while limestone plays a role in making the glaze melt better and increasing its hardness.

[0021] Therefore, the crystalline glaze containing limestone melts before the colored glaze described later and forms crystals of high hardness, and at this time, barium acts as a flux to lower the melting point, thereby inducing lithium and zinc to melt well and form crystals well.

[0022] As illustrated in FIG. 1, the second glaze application step (S20) is a process of applying a colored glaze to the surface of a body before the crystal glaze applied first to the surface of the body is dried.

[0023] If the colored glaze is applied after the crystalline glaze applied to the body has dried, the crystalline glaze may peel off, so it is desirable to apply and laminate the secondary colored glaze before the crystalline glaze applied to the body is completely dried.

[0024] The above-mentioned colored glaze is made by mixing 260 to 300 parts by weight of feldspar, 126 to 130 parts by weight of kaolin, 150 to 155 parts by weight of silica, 102 to 106 parts by weight of barium, 46 to 50 parts by weight of clay, 10 to 15 parts by weight of cobalt, 5 to 7 parts by weight of iron, 55 to 57 parts by weight of zinc, 7 to 9 parts by weight of oxide, 78 to 82 parts by weight of titanium, and 7 to 9 parts by weight of lithium with 150 to 170 parts by weight of water.

[0025] Here, the feldspar, kaolin, and silica of the colored glaze melt and vitrify during the second firing step described later, and in the process, the blue color is developed through the cobalt, causing the blue color to appear on the surface of the ceramic. At this time, iron activates the color development of cobalt to induce the color to be expressed vividly.

[0026] Meanwhile, in the first firing step (S30) above, the crystal glaze melts and gradually penetrates the colored glaze to crystallize, and at this time, the zinc, lithium, and titanium of the colored glaze help the crystallization of the crystal glaze to induce the expression of larger and clearer crystals.

[0027] As shown in FIG. 1, the first firing step (S30) is a process of inducing crystal formation on the surface of the substrate by firing the substrate at 800 to 1000°C for 2 to 3 hours.

[0028] Here, the first firing process gradually raises the temperature of the kiln from 800 to 1000°C for 2 to 3 hours to induce the crystal glaze applied to the body to gradually melt and penetrate the colored glaze, thereby forming crystals.

[0029] At this time, if the temperature of the kiln is raised too quickly from 800 to 1000℃ or raised above 1000℃, the crystal glaze may run down, so it is desirable to raise the temperature very slowly to less than 1000℃.

[0030] As shown in FIG. 1, the second firing step (S40) is a process of vitrifying the glaze by raising the temperature to 1240 to 1260°C and firing for 14 to 18 hours after crystals are formed on the surface of the substrate through the first firing step (S30).

[0031] As illustrated in FIGS. 1 and 2, the cooling step (S50) is a process in which, after the second firing step (S40) is completed, the inside of the kiln is sealed and then slowly cooled for 20 to 28 hours to complete the finished ceramic product (200).

[0032] At this time, as the molten zinc and barium of the crystal and colored glaze aggregate and condense, an even more brilliant crystal shape gradually emerges.

[0033] Here, since the temperature inside the kiln may cool rapidly if the kiln is not sealed from the outside, causing cracks to form in the ceramic or the developed crystals, it is preferable to produce a finished product, a ceramic (200) having blue crystals, by slowly cooling the kiln while keeping the kiln sealed.

[0034] A ceramic (200) having a crystal is produced as follows through a method (100) for manufacturing a ceramic having a blue crystal according to an embodiment of the present invention having the above configuration.

[0035] First, 2120g of feldspar, 360g of limestone, 720g of silica, 240g of barium, 360g of clay, 100g of zircon, 60g of stone oxide, 120g of lithium, 60g of zinc, and 40g of bone ash are mixed with 1.5ℓ of water to form a crystalline glaze, and

[0036] 2800g of feldspar, 1280g of kaolin, 1520g of silica, 1040g of barium, 480g of clay, 120g of cobalt, 60g of iron, 560g of zinc, 80g of stone oxide, 800g of titanium, and 80g of lithium are mixed with 1.7ℓ of water to form a colored glaze.

[0037] Then, the crystal glaze is applied first to the surface of the body through the bisque firing process. (S10)

[0038] Then, before the crystal glaze applied to the body dries, the coloring glaze is secondarily applied to the surface of the body. (S20)

[0039] Then, after placing the body into the kiln, it is fired first at 800 to 1000°C, and at this time, it is fired slowly by spending 2 to 3 hours to raise the temperature from 800 to 1000°C.

[0040] Then, as the body rapidly absorbs heat and overheats, the crystalline glaze in direct contact with the body and surface melts and penetrates the colored glaze layer, causing crystals to emerge; at this time, the zinc, lithium, and titanium of the colored glaze assist the crystalline glaze, inducing more effective crystal emergence. (S30)

[0041] Then, the temperature of the kiln is raised to 1250℃ for a second firing for 18 hours; during this process, as the glaze gradually melts and vitrifies, cobalt is used to induce a blue color on the surface of the body. (S40)

[0042] Then, the kiln is sealed and cooled for 24 hours. During this time, the molten zinc and barium of the crystals and colored glaze aggregate and condense, causing a brilliant crystalline shape to appear, and the finished product, the ceramic (200), is completed as shown in FIG. 2. (S50)

[0043] Although embodiments according to the present invention have been described above, they are merely illustrative and those skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. Accordingly, the scope of protection of the present invention should be defined by the following claims as well as their equivalents. Explanation of the symbols

[0044] S10. 1st Glazing Step S20. Second glazing step S30. 1st firing stage S40. Second firing stage S50. Cooling stage 100. Method for manufacturing ceramics having blue crystals 200. Ceramics

Claims

Claim 1 A first glazing application step (S10) of applying a crystalline glaze to the surface of a body formed by bisque firing of a vessel made in the shape of a ceramic; a second glazing application step (S20) of applying a color-developing glaze to the surface of a body before the crystalline glaze applied in the first step dries; a first firing step (S30) of firing the body at 800 to 1000°C for 2 to 3 hours to induce crystal formation on the surface of the body; and a second firing step (S40) of raising the temperature to 1240 to 1260°C and firing for 14 to 18 hours to vitrify the glaze once crystals are formed on the surface of the body through the first firing step (S30). A method for manufacturing ceramic having blue crystals, comprising: a cooling step (S50) in which, after the second firing step (S40) is completed, the inside of the kiln is sealed and then slowly cooled for 20 to 28 hours to complete the ceramic (200) as a finished product; wherein the crystal glaze is formed by mixing 200 to 220 parts by weight of feldspar, 35 to 37 parts by weight of limestone, 70 to 75 parts by weight of silica, 22 to 26 parts by weight of barium, 35 to 37 parts by weight of clay, 9 to 11 parts by weight of zircon, 5 to 7 parts by weight of stone oxide, 11 to 13 parts by weight of lithium, 5 to 6 parts by weight of zinc, and 3 to 5 parts by weight of bone ash with 150 to 170 parts by weight of water. Claim 2 A method for manufacturing ceramic having blue crystals according to claim 1, wherein the colored glaze is formed by mixing 260 to 300 parts by weight of feldspar, 126 to 130 parts by weight of kaolin, 150 to 155 parts by weight of silica, 102 to 106 parts by weight of barium, 46 to 50 parts by weight of clay, 10 to 15 parts by weight of cobalt, 5 to 7 parts by weight of iron, 55 to 57 parts by weight of zinc, 7 to 9 parts by weight of stone oxide, 78 to 82 parts by weight of titanium, and 7 to 9 parts by weight of lithium with 150 to 170 parts by weight of water.

Images