KR20110001468A - Method for menufactuing ceramic ware having salt glaze - Google Patents

Abstract

PURPOSE: A method for manufacturing ceramic ware with salt glaze is provided to prevent damage of a furnace caused by salt by spraying salt supersaturated solution to articles and to impart various colors. CONSTITUTION: A method for manufacturing ceramic ware with salt glaze comprises the steps of preparing salt supersaturated solution by sieving seawater or salty water; glazing an article by spraying the salt supersaturated solution to biscuit-fired article; and glaze-firing the biscuit-fired article. The salt is bay salt. The firing is oxidization firing or reduction firing.

Description

Salt oil ceramics manufacturing method {METHOD FOR MENUFACTUING CERAMIC WARE HAVING SALT GLAZE}

The present invention relates to a method of manufacturing salt oil ceramics, and more particularly, to a method of manufacturing salt oil ceramics by spraying a salt supersaturated solution in which seawater or salt is dissolved in water.

In general, ceramics are called pottery or porcelain, and are variously classified according to the type of clay, molding process, firing process and firing temperature, type of glaze or decorative technique, and place name. Its raw materials include silica, feldspar, kaolin, and plastic clay, and it is a product that is formed by drying alone, mixed, dried, and then firstly and chaebol.In addition to celadon and white porcelain, which we know well It includes all kinds of dishes, dishes, ornaments and other various forms.

In the manufacturing method of such ceramics, inorganic materials such as clay or feldspar are molded into a desired shape and dried, and then glazed to the finished baking and the finishing of the baking process to have a strength suitable for use as a ceramic. Pottery is made by completing the chaebol roasting process, which undergoes a second firing process followed by a milking process.

The glaze applied to the finished material is a thin layer of glass that adheres to the surface of ceramics, which lowers the absorbency of the porcelain, expresses aesthetics, and gives the ceramics strong strength. In other words, glaze is a formulation used to paint and heat-treat the surface of porcelain or pottery to form a gloss or matte surface layer on the surface, eliminating permeability, increasing the aesthetic effect and improving the strength of the porcelain. To add effect.

The glazes are classified into low, medium and high degree glazes, transparent oils, emulsion oils, matte oils, crystalline oils, kerosene oils, re-glazes and salt glazes, depending on their functions and materials.

On the other hand, salt-oil pottery means salt, that is, pottery manufactured using salt glaze as a glaze material, and salt-oil pottery is produced by directly throwing salt together with steam in a kiln to roast the firstly roasted items. As the salt is vaporized at high temperature, it is dualized with chlorine gas and sodium gas, among which sodium component reacts with alumina or silica contained in ceramics to form silicate to form oil of the film. Such salt oil pottery is prepared by throwing salt into the kiln at the time of roasting chaebol, but when the salt is thrown into the kiln, damage occurs to the kiln, and it is difficult to obtain a desired color.

That is, in the case of directly throwing salt, the salt component causes erosion of the refractory brick and the refractory board of the kiln. In particular, in the existing salt oil firing method, since the salt containing steam has to be thrown several times in the kiln, the use of many salt components further erodes the kiln.

Therefore, there is an urgent need for the development of technology to prevent the damage of the kiln, and to produce salt oil ceramics that can have a variety of colors.

One aspect of the present invention is to provide a method of manufacturing a salt oil pottery to prevent the damage of the kiln, and to obtain a variety of colors in the conventional salt oil ceramics.

The present invention provides a method of manufacturing ceramics, comprising: preparing a salt supersaturated solution in a sieve after dissolving salt water or salt in water;

Spraying and salting the salt supersaturated solution into a pre-baked product; And

It provides a method for producing salt oil ceramics comprising the step of baking (baking) the oiled oil.

According to the present invention, compared to the case of producing salt oil ceramics by throwing salt in the prior art, by spraying seawater or salt and saturated solution onto the primed substrate, the erosion of the kiln can be minimized by using the minimum salt. The economic effect of longer replacement cycles can be achieved. In addition, the iron component of the porcelain and the sodium component of the salt react to give a new color porcelain, and according to the method of firing, the opaque yellowish brown color (oxygen), reddish brown color (reducing element), and blackish brown color (reducing element) Various colors such as) can be obtained. In addition, there is an advantage that the density of the color can also be arbitrarily adjusted according to the number of injection times and time, the baking method.

The present inventors have studied in depth to solve the above problems, instead of the conventional method of throwing salt into the kiln, by applying a salt supersaturated solution to the substrate and then firing, the above problems can be solved, and various colors can be obtained. It is recognized that the present invention has led to the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

In the present invention, the salt oil pottery is molded, dried and first roasted, and then brewed with chaebol in a ceramic ware manufacturing method,

Preparing salt supersaturated solution in a sieve after dissolving salt water or salt in water;

Spraying and salting the salt supersaturated solution into a pre-baked product; And

It comprises the step of baking (baking chaebol) the said oiled substance.

The present invention relates to a glaze that is used during pottery during the manufacturing method of porcelain for shaping chaebol after forming and drying the porcelain base material, molded into a base and dried, and then roasted and lubricated.

The present invention first prepares seawater or salt supersaturated solution. At this time, the salt supersaturated solution is made by dissolving the salt until it is no longer dissolved in water and filtering it. At this time, it is preferable to use a natural salt for salt.

Preferably, the sun salt is added to lukewarm water, and the salt is added to the salt until it is no longer dissolved to produce a salt supersaturated solution. At this time, the amount of salt can be adjusted according to the desired degree of color after firing.

In addition to the salt to the natural salt in addition to the metal oxide, that is, the metal oxide that gives the color of the porcelain to 5% by weight or less can be obtained a change in the color of the porcelain according to the characteristics of the metal oxide. The metal oxide that can be added is not limited, but iron oxide (Fe ₂ O ₃ ), copper oxide (CuO), manganese oxide (MnO ₂ ), chromium oxide (Cr ₂ O ₃ ), cobalt oxide (CoO) is added Can be. In addition, by adding titanium oxide (TiO ₂ ), magnesium carbonate (MgCO ₃ ), etc., the color can be smoothly adjusted.

The seawater or salt supersaturated solution is sieved through a sieve and sprayed on a first-baked substrate. Conventionally, in order to manufacture salt oil pottery, the salt is thrown together with steam in a kiln and fired without directly lubricating the product. In the present invention, the seawater or salt supersaturated solution is directly applied to the substrate using a spraying technique, so that no damage to the kiln occurs.

The method of spraying the sea water or salt supersaturated solution by spraying directly on the first roasted material, in the case of the conventional method of throwing salt, the salt containing the steam several times (4 to 8 times) must be thrown in the kiln. Minimal salt is used compared to the method to minimize the erosion of the refractory material of the kiln.

The oiled oil is fired. This usually means the process of roasting chaebol. Chemically representing the firing process is as shown in the following formula (1) to (3).

(1) 2NaCl + 2H ₂ O → 2NaOH + HCl ↑

(2) 4NaOH + heat → 2NaO + 2H ₂ O

(3) 2NaO + xAl ₂ O ₃ ySiO ₂ → 2NaOxAl ₂ O ₃ ySiO ₂

As shown in the above formulas (1) to (3), the steam is contained in the kiln to decompose the salt of seawater or salt supersaturated solution at high temperature to decompose into caustic soda and hydrogen chloride, where the hydrogen chloride is volatilized. The caustic soda is decomposed into sodium oxide and water vapor according to the temperature in the kiln, and the sodium oxide reacts with the base on the surface of the product to form a thin film of sodium-alumina-silicate. Let's do it.

The salt film oil penetrates into the first roasted material by osmosis of a considerable amount of salt components. At this time, the sodium component of the salt and the iron oxide of the base reacts to express the color. Pictures of porcelain examples by the reaction are shown in FIGS. 1 and 2. 1 is a photograph showing a change in color when reducing firing after the application by a compound oil method of varying the oil concentration. In addition, Figure 2 is a photo of the ceramics made by using a combination of the earth to the salt oil firing on the outside and the inside of the white glaze and reduced calcining.

Firing at this time is performed by Oxidation firing or Reduction firing. Light reddish brown can be obtained in the case of calcining oxide, and dark red brown can be obtained in the case of reducing baking. This may be due to the relationship between Fe ₂ O ₃ and O. 3 and 4 show the difference in color of the plastic oxide and the reducing plastic. Figure 3 is a photograph showing the difference in the color of the case of firing the oxidation (a) and the case of reducing (b) when firing the salt oil of the present invention to the ceramics produced using the blue porcelain. 4 (a) is a case of oxidizing and oxidizing, and FIG. 4 (b) is a photograph showing a case of reducing and firing.

Conventionally, in the salt oil method of throwing salt, transparent oil can be mainly obtained, but in the case of the present invention which sprays salt supersaturated solution, the osmotic salt solution is applied to the surface of the surface by physically spray-pressing and spraying the surface. It penetrates and reacts with metal oxides in the body and develops various colors.

Figure 1 is a photograph showing the color difference when reducing firing after the application in a compound milking method of varying the concentration of milking.

FIG. 2 is a photograph of the baking of the salt oil of the present invention on the outside with the base oil prepared using the combination soil, and the white glaze on the inside.

Figure 3 is a photograph showing the difference between the color of the case of the case of oxidative oxidation (a) and reduced calcining (b) using the blue clay soil.

Figure 4 is a photograph showing the color difference between the case of oxidative firing and the reduction firing.

Claims (5)

In the method of manufacturing pottery, Preparing salt supersaturated solution in a sieve after dissolving salt water or salt in water; Spraying and salting the salt supersaturated solution into a pre-baked product; And Firing (baking) the oiled substance Salt oil ceramics manufacturing method comprising a. The method according to claim 1, wherein the salt is a salt oil ceramics manufacturing method using a natural salt. The method according to claim 1, wherein the firing is a method for producing salt pottery ceramics which is subjected to oxidizing or reducing firing. The method of claim 1, wherein the salt supersaturated solution is selected from the group consisting of iron oxide (Fe ₂ O ₃ ), copper oxide (CuO), manganese oxide (MnO ₂ ), chromium oxide (Cr ₂ O ₃ ) and cobalt oxide (CoO) A method for producing salt oil pottery containing at least one kind. The method of claim 1, wherein the salt supersaturated solution includes one or more selected from the group consisting of titanium oxide (TiO ₂ ) and magnesium carbonate (MgCO ₃ ).

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