KR20160075449A - Method of Manufacturing Porcelain Body having Sintering Flower - Google Patents

Abstract

The present invention discloses a manufacturing method of a porcelain body having a sintered color, comprising: a mixing step of mixing 80 to 95 wt% of porcelain clay consisting of celadon porcelain clay or white porcelain clay containing an iron oxide component with 5 to 15 wt% of a material for a sintered color, and forming a porcelain composition; a forming step of forming a shaped product by using the porcelain composition, and forming a slip layer on a surface of the shaped product; a drying step of naturally drying the shaped product; a coating step of coating a surface of the dried shaped product with transparent glaze using tree ash as a flux; and a sintering step of forming a porcelain body having a sintered color by sintering the shaped product coated with the glaze at sintering temperatures of 1150 to 1180°C, wherein the material for the sintered color is chamotte or feldspar. The manufacturing method of a porcelain body having a sintered color further comprises a preliminary sintering step of preliminary sintering the shaped product before the sintering step at preliminary sintering temperatures of 900 to 950°C and a reduction atmosphere. The manufacturing method of a porcelain body having a sintered color has an effect of realizing a sintered color on a surface of a porcelain body formed with porcelain clay such as celadon porcelain clay, white porcelain clay, or the like.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for manufacturing a sintered green body,

The present invention relates to a method for producing a fired green body capable of producing a fused body exhibiting fired color development on its surface.

Tea bowl is a pottery bowl for drinking tea. The tea bowl has been manufactured in various shapes and materials. Unlike ordinary pottery bowls, the tea bowl is an artifact that combines formative beauty and practicality. More specifically, the formative beauty is a beauty that can be felt first by a person as a morphological beauty. Even though the tea bowl is equipped with functions and colors, it can not be said to be a good bowl if it does not have formative beauty. The above practicality is a functional aspect as a tea bowl to make it comfortable when drinking tea. Next, the tea bowl should have good color and magnetization (degree of melted glaze).

Tea bowls are typically made of a base or glaze to create a variety of colors and patterns. The pattern applied to the tea bowl is a pattern formed entirely on the tea bowl, so that a person making the tea bowl is artificially formed. The most widely used method at present is a method of applying the powder coating technology by the method of manufacturing a powder sprayer disclosed in Korean Patent No. 10-0914496. However, it is difficult to make a beautiful pattern which is naturally generated by the influence of the material used in the process of making the bowl.

The present invention provides a method of manufacturing a ceramic substrate capable of forming a plastic color on the surface of a ceramic substrate formed of an amorphous material such as celadon or white sand.

The method of the present invention for producing a colored fibrillated green body according to the present invention comprises a mixing step of mixing 85 to 95% by weight of flesh and 5 to 15% by weight of firing coloring material to form a base composition; molding the formed body with the base composition; A drying step of naturally drying the molded body, a metering step of applying a transparent glaze to the surface of the dried molded body using a wood material as a fusing material, Is baked at a firing temperature of 1150 to 1180 캜.

Further, the abovementioned stones may be celadon soil or white porcelain soil. The firing coloring material may be any one selected from the group consisting of chymotte, quartz, feldspar, kaolin, pink kaolin, clay, iron oxide, and firing color inducing additive or a mixture thereof.

Also, the forming step may be performed such that the firing color development realizing position is adjusted by partially removing the slip layer formed on the surface of the molded body so that the firing color development is not partially generated on the surface of the ceramic body.

Further, the method may further include a rough grinding step of grinding the formed body at a rough grinding temperature of 800 to 850 캜 before the seeding step.

The method may further include pre-firing the pre-fired body in a reducing atmosphere at a pre-firing temperature of 900 to 950 ° C before the firing step.

Further, the method may further include a cooling step of cooling the ceramic body after the firing step, wherein the cooling step may be performed to cool the ceramic body at a speed lower than the temperature rising speed in the firing step.

The method of the present invention for producing a colored ceramic substrate has the effect of realizing plastic coloring on the surface of a ceramic substrate formed of a ceramics such as celadon or white sand.

In addition, the method of the present invention for producing a fired-on-a-color photographic light-sensitive material has an effect that the firing color development is partially prevented from being generated on the surface of a ceramic substrate, have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a method of manufacturing a fired green body according to an embodiment of the present invention. FIG.
2 is a photograph of a tea bowl manufactured according to the first embodiment of the present invention.
3 is a photograph of a tea bowl manufactured according to a second embodiment of the present invention.
4 is a photograph of a tea bowl manufactured according to a third embodiment of the present invention.
5 is a photograph of a tea bowl manufactured according to a fourth embodiment of the present invention.
6 is a photograph of a tea bowl manufactured according to the fifth embodiment of the present invention.
7 is a photograph of a tea bowl manufactured according to the sixth embodiment of the present invention.
8 is a photograph of a tea bowl manufactured according to the seventh embodiment of the present invention.
9 is a photograph of a tea bowl manufactured according to the eighth embodiment of the present invention.
10 is a photograph of a tea bowl manufactured according to the ninth embodiment of the present invention.

Hereinafter, a method for producing a fired-green colored ceramic substrate according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, a method of manufacturing a firing-colored ceramic substrate according to an embodiment of the present invention will be described.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a method of manufacturing a fired green body according to an embodiment of the present invention. FIG.

1, a method of manufacturing a plastic green substrate according to an embodiment of the present invention includes mixing step S10, forming step S20, drying step S30, reflow step S40, and firing step S50, And a cooling step (S60). In addition, the method for producing a plastic green sheet may further include a rough grinding step (S35) and a preliminary firing step (S45).

In the method for producing a plastic coloring substrate, a sintering color (sintering flower) (or a thermal dyeing phenomenon) may be formed on the surface of a ceramic substrate by using a substrate composition in which a plastic coloring material is mixed with a coloring material such as celadon soil or white sand. The attic such as the celadon soil or the white sand soil includes an iron oxide component so that the calcination color is better formed. In addition, in the method for producing a plastic coloring substrate, a slip layer is formed on the surface of the molding in the molding process, so that the firing color is more clearly formed. In addition, in the method for producing a plastic green body, the slip layer formed on the surface of the green body is partially removed so that the firing color development is not partially generated on the surface of the ceramic green body so that the firing color development position is controlled. Here, the slip layer refers to a thin layer formed on the surface of a molded article in the process of molding the molded article to form the ceramic article.

The method for producing a plastic green body can be applied to the manufacture of various ceramics, and in particular, to the manufacture of tea bowls. When the tea is poured, the tea bowl produced by the method of producing a plastic coloring ceramic material has a mysterious phenomenon such as a color change caused by scattering and refraction of light due to the firing portion of the surface of the ceramic, thereby increasing the value as a tea bowl.

The mixing step (S10) is a step of mixing the substrate composition of the present invention. The base composition is formed to contain 85 to 95% by weight of an attatite and 5 to 15% by weight of a calcination coloring material based on the total weight of the base composition. The abovementioned stones can be selected from celadon soil or white porcelain soil, and it is a main material of ceramics having a high preference as a traditional ceramics material of Korea. Since the ceramics produced from the above-mentioned fats are uniform in color, firing color formation to be formed can be more clearly expressed. In addition, the above-mentioned attitutes may be added in the form of granules larger than the raw material powder, if necessary. In the case where the above-mentioned attitutes are added in the form of granules, pores are formed in the inside of the ceramic substrate during the drying process so that the calcination color can be smoothly formed.

The firing coloring material is formed of any one selected from the group consisting of chamotte, feldspar, kaolin, pink kaolin, clay and iron oxide, or a mixture thereof. In addition, the plastic coloring material may be a plastic coloring inducing additive, which is a material prepared by mixing iron oxide and attatite. For example, the calcination color inducing additive may be prepared by mixing 1.0 to 3% by weight of iron oxide powder in clay, calcining and pulverizing at 800 ° C or higher, and sieving with a 40-mesh screen. The calcination coloring material includes an iron oxide component and forms a calcination in the calcination. In addition, the firing coloring material may be added in the form of granules larger than the raw material powder. When the fired coloring material is added in the form of granules, pores are formed in the inside of the ceramic substrate in the drying process, so that the firing coloring can be smoothly formed. The plastic coloring material forms a plastic color on the surface of the ceramic substrate in the process of mixing with calcareous firing. The firing coloring material provides an iron component or a metal alkaline salt component necessary for calcination coloring. If the content of the firing coloring material is too small, the firing color development of the ceramic green body becomes insufficient. Also, if the content of the calcination coloring material is too large, the color of the donor element will be away from the inherent color due to the celadon soil or the white sand. The calcined coloring material is preferably powder sieved at 40 mesh. When the firing and coloring materials are sieved and mixed, the size of the firing color decreases, and a plurality of firing and coloring materials are scattered and expressed. If the powder of the predetermined coloring material is too large, the firing color is not uniformly formed on the ceramic element as a whole, or the firing color is too large.

The forming step S20 is a step of kneading the base resin composition and molding it into a molded body. The forming step S20 may be performed by spinning or molding. In addition, the forming step S20 is preferably performed so as to form a slip layer on the surface of the molded article by itself during the molding process. At this time, the self-slip layer is spontaneously dressed in the molding process when the molded body advances to spinning. In addition, when the molded body is molded by molding, a slip layer is formed on the surface of the molded body by using an earthenware made of the resin composition through a separate process. The slip layer is formed on the surface of the molded body to temporarily close the pores located adjacent to the surface of the molded body and to generate pressure in the pores in the firing process.

In addition, the forming step S20 may further include a step of partially removing the slip layer formed on the surface of the molded article. When the slip layer is removed, firing color development is not expressed in the firing step. Therefore, the molding step S20 may be performed so that the firing color development is partially controlled so that the firing color development is not generated on the surface of the ceramic base.

The drying step (S30) is a step of naturally drying the formed body. The molded body is kept at a normal temperature and moisture present inside the surface and on the surface is evaporated.

The rough grinding step (S35) is a step of rough grinding the formed body at a rough grinding temperature of 800 to 850 deg. In the rough grinding step (S35), the molded body is grated to uniformly squeeze the glaze as a whole. If the pre-baking temperature is too low, the effect of pre-baking becomes small. In addition, if the initial grinding temperature is too high, the grinding may excessively proceed and the calcination may not be sufficient.

In the step S40, the transparent glaze using wood material as a solvent is applied to the surface of the dried molded article. The molded article is substantially free of moisture on the surface due to the drying step. Therefore, the glaze can be evenly applied to the surface of the molded article. The transparent reagent is formed using a wood material such as pine wood as a solvent. More specifically, the transparent reagent may be formed by mixing feldspar, stones, and pine wood. The green body is formed with a glaze layer on its surface by the fluidizing step (S40). At this time, when the slip layer is formed on the surface of the molded body, the glaze layer is formed on the surface of the slip layer.

The firing step (S50) is a step of firing the formed molded body in an oxidizing atmosphere and a firing temperature of 1150 to 1180 DEG C to form a ceramic body. The firing step (S50) is a step of firing the molded body and forming a firing color on the surface of the ceramic body. If the firing temperature is too low, firing of the molded body may not be sufficient, and if it is too high, firing color development may disappear. The firing atmosphere proceeds in an oxidizing atmosphere and can proceed in a standby state. Further, the firing atmosphere may be conducted in a reducing atmosphere. If the firing atmosphere is an oxidizing atmosphere, the entire firing atmosphere is oxidized to brown color. Further, when the firing atmosphere is a reducing atmosphere, it is reduced to blue and developed. The firing step (S50) proceeds at a firing temperature for 12 hours or more. The firing step (S50) proceeds so as to rise at a temperature rising rate of 5 deg. C per minute to the firing temperature. Also, the firing step (S50) may be performed so as to increase the temperature at a rate of 2 ° C per minute up to 600 ° C. In the firing step (S50), the rising speed of the temperature is faster than the falling speed of the temperature at the time of cooling. If the rising speed of the temperature is fast and the falling speed of the temperature is slow in the firing step (S50), firing color development is well expressed.

The calcination color development is a kind of partial oxidation phenomenon, and it is judged that the metal oxide contained in the calcination coloring material which is a raw material of the substrate composition reacts with the soluble alkali salt component of the glaze. At this time, a red pattern is formed in the lower part of the transparent glaze layer in the area where the plastic coloring is formed, and pinholes are formed in the transparent glaze layer. Further, quartz grain is observed in the region where the calcination coloring is generated.

The firing step (S50) may be carried out by further including a pre-firing step (S45) at an early stage. The pre-firing step (S45) is a step of firing the formed body at a pre-firing temperature of 900 to 950 캜 and a reducing atmosphere. In the pre-firing step (S45), the molded body is heated in the pre-firing temperature, which is a relatively lower temperature than the firing temperature, and in the reducing atmosphere, so that different colors are totally expressed unlike the firing in the oxidizing atmosphere in the firing step (S50). The reducing atmosphere reduces the oxygen supply rather than the oxidizing atmosphere and increases the fuel supply, so that the incomplete combustion state in which oxygen is not sufficiently supplied is maintained, so that a green oxide having a color different from that in the oxidizing atmosphere is formed. This phenomenon is considered to be caused by the separation of oxygen from the glaze and the molded body in the reducing atmosphere, and the porcelain is blue. If the pre-firing temperature is too low or high, the effect of pre-firing becomes low.

The cooling step (S60) is a step of cooling the fired ceramic body. The cooling step S60 preferably proceeds at a temperature lowering speed lower than the temperature rising speed for the firing step. When the temperature lowering rate is low in the cooling step (S60), firing color development is well expressed.

Hereinafter, a method for producing a firing-colored ceramic substrate will be described with reference to specific examples of the present invention.

First, the first embodiment will be described.

The base composition of the first embodiment was prepared by weighing and mixing 90 wt% of celadon soil and 10 wt% of chamois. That is, the base composition used chrysotile as a main component and chymotte as a calcining coloring material. The chamois produces a calcined color as a substance containing an iron oxide component. The base composition was molded into a green body-shaped molded body through spinning. The formed body was allowed to form its own slip layer on its surface during the spinning process. The molded body was kept in the air to be naturally dried first. The molded body was baked at 1170 ° C after a transparent glaze was applied to the surface to prepare a tea bowl. At this time, the firing was maintained in a reducing atmosphere. FIG. 2 is a photograph of a surface of a tea bowl manufactured according to the above embodiment. On the surface of the above-mentioned tea bowl, the ceramic substrate is blue overall, and the calcination color is expressed.

Next, the second embodiment will be described.

The base composition of Example 2 was prepared by mixing 90 wt% of celadon soil with 10 wt% of feldspar. That is, feldspar was used as the calcination coloring material in the base composition, unlike the first embodiment. In addition, the feldspar used granulated powder sieved by a 40-mesh net. 3 is a photograph of the surface of the tea bowl manufactured according to the second embodiment. Referring to FIG. 3, the tea bowl according to the second embodiment exhibits firing color development on the surface.

Next, the third embodiment will be described.

The base composition of Example 3 was prepared by mixing 90% by weight of celadonite and 10% by weight of pink kaolin. Unlike the first embodiment, the base composition used pink kaolin as a firing coloring material. The pink kaolin used was a granulated powder sieved by a 40 mesh screen. The pink kaolin was calcined at 850 ° C. 4 is a photograph of the surface of a tea bowl manufactured according to the third embodiment. Referring to Fig. 4, the tea bowl according to the third embodiment shows that firing color development is generated on the surface.

Next, the fourth embodiment will be described.

The base composition of Example 4 was prepared by mixing 90 wt% of celadon soil with 10 wt% of clay. That is, clay is used as the calcination coloring material in the base composition, unlike the first embodiment. The clay was sieved with a 40 mesh net. The clay was calcined at 850 ° C. 5 is a photograph of the surface of a tea bowl manufactured according to the fourth embodiment. Referring to Fig. 5, the tea bowl according to the fourth embodiment exhibits firing color development on the surface.

The following describes the fifth embodiment.

The base composition of Example 5 was prepared by mixing 90% by weight of white sand and 10% by weight of pink kaolin. That is, the base composition used was white porcelain as a main component and pink kaolin as a firing coloring material. Further, the pink kaolin used was a granulated powder sieved by a 40-mesh screen. The pink kaolin was calcined at 850 ° C. 6 is a photograph of the surface of a tea bowl manufactured according to the fifth embodiment. Referring to FIG. 6, the tea bowl according to the fifth embodiment exhibits firing color development on the surface.

The following describes the sixth embodiment.

The base composition of Example 6 was prepared by mixing 90% by weight of white sand and 10% by weight of clay. Unlike the fifth embodiment, clay is used as the plastic coloring material in the base composition. The clay was sieved with a 40 mesh screen. The clay was calcined at 850 ° C. 7 is a photograph of the surface of a tea bowl manufactured according to the sixth embodiment. Referring to Fig. 7, the tea bowl according to the sixth embodiment exhibits firing color development on its surface.

Next, the seventh embodiment will be described.

The base composition of Example 7 was prepared by mixing 88% by weight of white porcelain with 2% by weight of iron oxide. Further, the base composition was further blended with 10 wt% of white rice grains. The white granules were calcined at 1,100 ° C and sieved through a 40 mesh screen. Unlike the fifth embodiment, iron oxide was used as the calcination coloring material. 8 is a photograph of the surface of a tea bowl manufactured according to the seventh embodiment. Referring to Fig. 8, the tea bowl according to the seventh embodiment exhibits firing color development on its surface.

The eighth embodiment will be described below.

The base composition of Example 8 was prepared by mixing 89% by weight of white porcelain with 1% by weight of iron oxide. In addition, the base composition additionally contained 10 wt% of quartz grains. The quartz grains were sieved through a 40 mesh screen and used. Unlike the fifth embodiment, iron oxide was used as the calcination coloring material. 9 is a photograph of the surface of a tea bowl manufactured according to the eighth embodiment. In the tea bowl according to the eighth embodiment, referring to Fig. 9, it can be seen that firing develops on the surface.

Next, the ninth embodiment will be described.

The base composition of Example 9 was prepared by mixing 90% by weight of white ash and 10% by weight of a firing color inducing additive. Unlike the fifth embodiment, the substrate composition used was a calcination coloring inducing additive as a calcination coloring material. The calcination color inducing additive is a powder prepared by mixing 2 wt% of iron oxide powder into clay, calcining and pulverizing at 800 ° C, and sieving with a 40 mesh screen. 10 is a photograph of the surface of a tea bowl manufactured according to the ninth embodiment. Referring to Fig. 10, the tea bowl according to the ninth embodiment shows that firing color is generated on the surface.

Claims (2)

A mixing step of mixing 85 to 95% by weight of attrito consisting of celadon soil or white sand containing iron oxide components and 5 to 15% by weight of a calcination coloring material to form a base composition;
A forming step of forming a molded body with the substrate composition and forming a slip layer on the surface of the molded body;
A drying step of naturally drying the molded body,
A transparent dyeing step of applying a transparent glaze to the surface of the dried molded article using a wood material as a solvent,
And a firing step of firing the green body to which the glaze is squeezed at a firing temperature of 1150 to 1180 ° C to form a ceramic body in which firing color is generated,
Wherein the firing coloring material is chamois or feldspar,
Before the firing step
And a pre-firing step of pre-firing the formed body in a reducing atmosphere at a pre-firing temperature of 900 to 950 ° C. The method according to claim 1,
After the firing step
Further comprising a cooling step for cooling the ceramic body,
Wherein the cooling step is performed so as to cool the ceramic substrate at a speed lower than a temperature rising speed in the firing step.

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