KR940005077B1 - Process for producing glazes sintering and ware - Google Patents

Abstract

The useful pottery is manufactured by (a) first baking a raw pottery at 700-1150 deg.C, (b) covering a glaze on the outer surfurce of the pottery, (c) sticking the coloring glaze sintered material to the glaze-covered surface, (d) second baking the pottery at 950-1050 deg.C, and (e) covering melamine, epoxy resin or acryl resin on the inner surface of the pottery. The glaze sintered material is composed of PbO, CaO, Al2O3, SiO2, Na2O, inorganic pigment and water.

Description

Color glaze sintered body and practical ceramic using the same

The present invention relates to a colored glaze sintered body and a practical ceramics using the same.

In general, practical ceramics are prepared by mixing clay, silica and feldspar, which are mainly composed of kaolite, in varying proportions according to the properties of the ceramics, pulverizing, kneading and winning well by a ball mill. These materials are molded into the desired shape by hand or by using a mold. The molded material is dried at a temperature of 200 ° C. or lower and then first roasted at 700 ° to 900 ° C. If necessary, glaze is applied after the pattern or pattern is put and chaebol roasted at 1000 ° to 1450 ° C, which is the dishware we usually use. Alternatively, after the molded material is dried, it is often coated with glaze, baked first, and then a picture and a pattern are added to the final roasting.

On the other hand, the low temperature glaze mainly based on PbO is rarely used for practical purposes due to the concern of contamination by PbO despite the light and light color effect due to its brilliance and flow characteristics. .

The present invention relates to ceramics with practical use while fully utilizing the characteristics of the low temperature glaze based on lead oxide.

Specifically, the present invention provides a suitable amount of inorganic to powder mixed with PbO, CaO, Al ₂ O ₃ , SiO ₂ and Na ₂ O in a molar composition ratio of 0.4 to 0.8, 0.1 to 0.5, 0.01 to 0.5, 1.4 to 1.8 and 0.01 to 0.3. The present invention relates to a colored glaze sintered body for ceramics which is mixed with a pigment and water, and sintered at 700 ° to 900 ° C. to be crushed to a size of 20 mm or less.

Furthermore, the present invention relates to porcelain which is glazed at 950 ° to 1050 ° C. by applying glaze to first and second porcelains and applying the glaze sintered body prepared above.

In addition, the present invention is applied to the glaze outside the porcelain glaze on the first roasted porcelain and attached to the above-described glaze colored glaze sintered body on the chaebol at 950 ° to 1050 ℃ and then melamine in the interior of the pottery roasted porcelain It relates to porcelain coated with epoxy resin or acrylic resin.

The color glaze sintered body and ceramics of the present invention will be described in detail below.

It is mix | blended according to the objective in the range of 30 to 60% of clay, 20 to 50% of quartzite, and 20 to 30% of feldspar, and it grind | pulverizes with a ball mill by adding water. Here, instead of silica, it is possible to add pottery with silica. The excess is filtered through a filter press, kneaded and beat to increase plasticity. The porcelain material is formed into a certain shape and dried at a temperature of 200 ° C. or lower. The dried ceramics are first baked at a temperature of 700 ℃ to 1150 ℃ and the softened melting temperature around 1000 ℃ is used as the ground glaze on the surface of the baked ceramics. Apply only the low temperature molten glaze glaze sintered body of lead oxide of suitable size. The sintered body of this glaze has a molar composition ratio of 0.4 to 0.8 PbO, 0.1 to 0.5 CaO, 0.01 to 0.4 Al ₂ O ₃ , 1.4 to 1.8 SiO and 0.01 to 0.3 Na ₂ O, and an appropriate amount of inorganic pigment and water at 700 ° to 900 ° C. It is prepared by sintering at a temperature of crushed to a suitable size. More preferably, the sintered body has a composition ratio of 0.5 to 0.7 PbO, 0.2 to 0.4 CaO, 0.1 to 0.3 Al ₂ O ₃ , 1.5 to 1.7 SiO _2, and 0.01 to 0.2 Na ₂ O. Various inorganic pigments are mixed to make various color effects. Various techniques may be applied to make use of the flow characteristics of the low-temperature molten bright glaze sintered body. For example, by bringing the sintered body which mixed different pigments into close proximity, the coloration and lightness effect by a flow can fully be utilized.

Ceramics coated with glaze and attached with low-temperature molten glaze sintered body are roasted at 950 ° C to 1050 ° C. The chaebol roasting at the firing temperature of 1050 ° C. or higher tends to burn lead components of the sintered body of the low temperature bright glaze, resulting in a poor glaze layer. In addition, when the chaebol roasted below the temperature of 950 ℃ is insufficient glass formation of the glaze layer is not only poor color, but also the strength of the ceramics.

When the chaebol-baked pottery is left in the air and cooled to room temperature, a porous pottery having a beautiful surface color can be obtained. When the base glaze is applied inside and out, it becomes a finished product by itself. When the base glaze is applied only on the outside, melamine resin, epoxy resin or acrylic resin is applied to the inside of the pottery. As a method of applying such a resin, a method of depositing or painting with an appropriate brush may be applied according to a conventional method. Or spray using a suitable spray gun. Except in the case of deposition, it is preferable to repeatedly apply the coating method. As these resins penetrate and cure between pores in porcelain porcelain, the porcelain porcelain is not only water resistant but also increases its strength considerably.

Example 1

A small amount of water and a red inorganic pigment are mixed in a powder mixture in which the molar ratios of PbO, CaO, Al ₂ O ₃ , SiO ₂ and Na ₂ O are 0.6, 0.3, 0.2, 1.6 and 0.1, respectively. The mixture is sintered at 800 ° C. and the sintered compact is pulverized from 3 mm to 10 mm in diameter to produce a colored glaze sintered body.

The base material of 50% of clay, 10% of quartzite, 10% of pottery stone and 30% of feldspar is crushed with a ball mill, filtered through a filter press, kneaded and beated to prepare the base material. The ingredients are placed on a spinning wheel to form a ceramic. This porcelain is put in a dryer and dried at room temperature. The dried porcelain is first baked at 700 ℃ ~ 1150 ℃. Apply white porcelain oil of softening melting temperature 1000 ℃ inside and outside. The white glaze sintered compact prepared previously is attached before this white oil is dried.

The applied porcelain was roasted at 1000 ° C. Porcelain with a beautiful color effect on a white background was obtained.

Example 2

The porcelain was prepared in the same manner as in Example 1 except that only white porcelain oil was applied outside of the roasted porcelain.

The hardener was mixed with epoxy resin inside the pottery-baked pottery and applied three times with a brush. This was followed by drying at 100 ° C. for 3 hours in a drier. The watertightness test was carried out by filling the inside of the ceramics. There was no leakage for 24 hours, and the impact strength of the commercial ceramics of similar thickness and dropping on the concrete floor was superior to that of commercial ceramics.

As described above, the porcelain according to the present invention is excellent in color shade effect and there is no fear of contamination by lead oxide on the contents contained in the porcelain.

Claims (3)

Mixing PbO, CaO, Al ₂ O ₃ , SiO ₂ and Na ₂ O with an appropriate amount of inorganic pigment and water in a powder mixed with a molar composition ratio of 0.4 to 0.8, 0.1 to 0.5, 0.01 to 0.5, 1.4 to 1.8 and 0.01 to 0.3 And a colored glaze sintered body for ceramics sintered at a temperature of 20 mm or less by sintering at 700 ° to 900 ° C. Ceramics that are glazed at 950 ° to 1050 ° C by applying glaze to first and second porcelain and applying the glaze sintered body of claim 1 on the outside glaze coating. Glaze is applied to the first-glazed pottery, and the sintered glaze of the above-mentioned glaze is attached to the outer glaze coating, and then the chaebol is roasted at 950 ° to 1050 ° C. and then melamine, epoxy resin or acrylic Ceramics coated with resin.