KR20080097576A - Method for preparing a pigment of ceramics comprising alloy and the pigment composition of ceramics thereby - Google Patents

Abstract

A method for preparing a pigment of ceramics comprising alloy and the pigment composition of ceramics thereby is provided to have a dispersion effect and a chromogenic effect higher than a pigment composition manufactured by a preexistence pigment method and to color a color of the alloy uniformly. A silica(SiO2) and an alloy piece are mixed. The mixture is plasticized at a firing temperature of 1000~1300°C. The plasticized material is pulverized. Chaff meal or rice straw ash is used as the silica. A mixing weight rate of the silica and the alloy piece is 1:1~ 3:1. The plasticized material is pulverized into a 7~13 mum of size.

Description

Method for preparing a pigment of ceramics using the alloy and thereby a pigment composition of ceramics {Method for preparing a pigment of ceramics comprising alloy and the pigment composition of ceramics thereby}

1 is a XRD measurement graph of a fired product of a mixture of brass (brass) and rice hulls.

Fig. 2 is an XRD measurement data sheet of a fired product of a mixture of brass (brass) and rice hulls.

3 is a photograph showing the color development result after calcining after mixing and pigmenting the pigment composition of the present invention in the glaze.

The present invention relates to a method for producing a pigment of porcelain using an alloy and a pigment composition of porcelain produced thereby.

On the surface of ceramics, glaze, which is usually a glassy powder, is applied in a thin layer. Glazed ceramics have a strong strength and have no absorbency. They are convenient to use. Glaze is absolutely used in industrial ceramics because it has the advantage of making the surface smooth and clean to facilitate cleaning.

The color of ceramics using such glazes is obtained by heat-treating metal oxides such as iron oxide, copper oxide, and cobalt oxide in a kiln, and various and rich colors can be obtained below 1000 ° C, but color is extremely limited at about 1300 ° C. Pigments are used by mixing flux and refractory materials, which are calcined at high temperatures to give color. These colors may change depending on the mixing materials and may also change due to differences in firing temperatures or minor component crises. Glaze coloring is usually done by adding metal oxides or metal salts to glazes. The additives react with glazes at high temperatures to dissolve and develop colors.

However, in the past, only a single metal oxide was used to develop a color of the metal. There was no method of using the alloy as a pigment of porcelain to color the color of the alloy as it is. Since the alloy is a metal, unlike a single metal oxide, the grinding was not easy. On the other hand, the method of mixing a single metal oxide is not uniformly mixed with each other on the particle size of the metal oxide powder was not able to uniformly color the color mixed with two or more metals. However, in the case of the alloy, since the mixing is uniform because it is mixed in the liquid phase at the time of manufacture, the present inventors have studied the method of using the alloy.

The present invention has been made to solve the problems of the prior art as described above, it is an object of the present invention to develop a method of using the alloy as a pigment of ceramics to be able to uniformly color the color of the alloy.

In order to achieve the above technical problem, the present invention comprises the steps of mixing silica (SiO ₂ ) and alloy pieces; Firing the mixture at a firing temperature of 1000 to 1300 ° C; And pulverizing the fired product. Provides a method of producing a pigment of porcelain using an alloy comprising a. At this time, preferably, the silica is used chaff or rice straw material, and the silica and alloy pieces are mixed in a weight ratio of 1: 1 to 3: 1.

In another aspect, the present invention provides a pigment composition of ceramics using an alloy consisting of a metal silicate salt and a metal oxide pulverized pulverized a mixture of silica and alloy pieces prepared by the above production method, and still preferably As the silica, rice hull or rice straw is used.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1. Manufacturing method of pigments in ceramics using alloys

Silica powder may be used as silica (SiO ₂ ) used in the present invention, but in order to allow the reaction to occur more quickly and completely, it is preferable to use a silica material. As a siliceous material, chaff or rice straw is used, which is amorphous and reacts well with the alloy. The silica is mixed with the alloy pieces, and the alloy may be used in various ways such as copper alloys such as brass, bronze, zinc alloys, magnesia alloys. On the other hand, when mixing the silica and the alloy pieces, the weight ratio is preferably 1: 1 to 3: 1.

The mixture of the silica and the alloy forms a fired product through a firing step, and the firing temperature is preferably 1000 to 1300 ° C. If the firing temperature is 1300 ℃ or more, it is difficult to melt and crush. If the firing temperature is less than 1000 ℃, the synthesis of the metal silicate salt is not performed well.

In order to use the calcined product as a pigment of porcelain, it is required to pulverize evenly with fine powder. When the alloy is calcined by mixing with silica, i.e., silica, as described above, the original alloy oxides are not easily crushed. Grinding becomes easy enough to grind with a bowl. The oxide pulverized product can be prepared into a very fine particles with a mortar and it is mixed with the glaze of porcelain and acts as a pigment that is developed when the subsequent firing step. At this time, preferably, the fired material is pulverized to 7 ~ 13㎛.

2. Pigment of porcelain using alloy

When baking glazes containing porcelain pigment compositions using porcelain pigments using alloys composed of oxide pulverized mixtures of silica and alloy fragments prepared by the above method in porcelains, the porcelains are colored evenly after firing. In this case, the color is different depending on the type of alloy as well as the burning atmosphere in the kiln, that is, the minor component crisis. In other words, when copper alloy is used, blue color is developed in the oxidative firing to be completely burned, but red color is produced in the reducing firing which is incomplete combustion.

Example  One.

Brass (brass) and rice hulls were mixed at the same ratio (weight) and calcined at 1100 ° C. and measured by XRD (X-ray diffractometer). The measurement results are the same as the graph of FIG. 1 and the data data of FIG. 2. A mixture of SIGGRAPH analysis brass and chaff material is firing jeokdongseok (Cuprite, Cu ₂ O) and wilre mite (Willemite, Zn ₂ SiO ₄₎ is when the bar a mixture of bronze and chaff material firing found chaff material SiO ₂ component It can be seen that it reacts with brass to cause a reaction.

Example  2.

As in Example 1, a mixture of brass (brass) and rice hulls was mixed at a weight ratio of 1: 1 and calcined at 1100 ° C. 3, 5, 7% (weight) was added at a rate of applying it to the specimen and calcined at 1260 ℃ (oxidation) and 1240 ℃ (reduction).

Color development results are shown in FIG. 3. In FIG. 3, 0.5, 1, 1.5, 2, 2.5, 3, 5, and 7 represent the amounts of the pigment composition contained in the glaze, respectively, and lime oil, lime barium oil, and magnesia oil are used as glazes in that order. In each case, the upper side shows the result of oxidizing and firing after the application, and the lower one shows the result of reducing and firing.

Unlike the pigments prepared by the conventional pigment production method, the pigment composition prepared according to the present invention is obtained by sintering an alloy together with silica mineral to synthesize metal silicate salts and metal oxides. It also showed good color development effect in glaze.

As described above, the method for producing a pigment according to the present invention provides a new method that can use the alloy as a pigment of porcelain.

In addition, the pigment composition of the ceramics using the alloy according to the present invention has a good dispersion effect and color development effect than the pigment composition prepared by the existing pigment production method to enable the color of the alloy uniformly to the ceramics.

Claims (5)

Mixing silica and pieces of alloy; Firing the mixture at a firing temperature of 1000 to 1300 ° C; And Pulverizing the fired product; Method for producing a pigment of porcelain using an alloy comprising a. In claim 1, The silica is a method of producing a pigment of porcelain using an alloy, characterized in that rice hull or rice straw material. The method of claim 1 or 2, The silica and the pieces of the alloy is a method of producing a pigment of porcelain using the alloy, characterized in that the mixture in a weight ratio of 1: 1 to 3 :: 1. Porcelain pigment composition using an alloy composed of a metal silicate salt and a metal oxide powder obtained by pulverizing a fired product of a mixture of silica and an alloy fragment. In claim 4, The silica is a pigment composition of the ceramics using an alloy, characterized in that rice hull or rice straw material.

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