KR101819149B1 - Composition for functional ceramic ware using pumice and method for calcining thereof - Google Patents

Abstract

The present invention relates to a functional ceramic composition using pumice and a firing method thereof, and more particularly, to a functional ceramic composition using pumice, which comprises pumice and cobalt in a weight ratio of 1: 0.5 to 5.
According to the present invention, there is an advantage that the color of the celadon can be expressed through the ceramic composition rather than the glaze. In addition, it is possible to reproduce the color of Goryeo celadon, which is advantageous in producing high value-added ceramics. In addition, the produced ceramic has an advantage of having anti-corruption function.

Description

TECHNICAL FIELD [0001] The present invention relates to a functional ceramic composition using pumice, and a firing method thereof. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a functional ceramic composition using pumice and a method of firing the same, and more particularly, to a functional ceramic composition using pumice for coloring a beautiful color in fired ceramics by firing using pumice and stearate, And a firing method.

Celadon is a term that refers to the blueness of the blue self.

And the color-blind celadon refers to the distinguished celadon among the celadon produced in the Goryeo period. These colorists have been evaluated as the first luxury products in the 12th century and although they are still appreciated today, they have not found a way to manufacture the same level of celadon celadon as in the Goryeo period.

The coloring principle of celadon revealed to date is that the 3% iron oxide contained in the agate and the 1% iron oxide contained in the glaze are subjected to the priming and the glaze firing, and the glaze color is formed in the interface layer between the glaze and the glaze. That is, the iron oxide included in the attritor and the glaze was ionized into divalent iron (Fe ²⁺ ) through heat dissociation, and the iron ion was developed into green color.

However, ceramics were produced by various calcinations, but they did not exhibit the color of Goryeo celadon.

On the other hand, most of the celadon is currently manufactured through glaze coloring. Examples of such glaze include a glaze composition using iron oxide and cobalt of Korean Registered Patent No. 10-0387920, a glaze composition using chromium oxide and iron oxide of Korean Patent Laid-Open No. 10-2005-0108995, Glaze compositions using bean pods, feldspar, clamshells and the like.

However, these glaze compositions have a disadvantage in that they use an excessive metal oxide for coloring the celadon to adversely affect the human body, or have poor coloring power and thus can not express luxury and delicate natural beauty.

In addition, in some cases, the coloring of celadon was attempted through various substrate compositions rather than glaze. Such a technique includes a base composition comprising a Co (NO ₃ ) ₂ solution, an Al (NO ₃ ) ₂ solution and an alkaline solution in a slurry containing solids consisting of clay, feldspar and silica in Korean Patent No. 10-1265943 have.

However, these pre-registered patents were not able to produce high-quality ceramics because their coloration was different from that of Goryo celadon.

KR 10-0387920 B1 KR 10-2005-0108995 A KR 10-1079706 B1 GB 0-1265943 B1

Accordingly, an object of the present invention is to make a ceramics composition using pumice and kaolin, and firing the same to make a celadon colorimetric expression through the non-glaze coloring.

In order to accomplish the above object, the functional ceramic composition using pum of the present invention is characterized by comprising pumice and cadmium in a weight ratio of 1: 0.5 ~ 5.

The pumice and the stearate further comprise an octol, a zeolite or a mixture thereof.

The pumice comprises 1-3 wt% of iron carbide in 100 wt% of pum, 1 to 5 wt% of iron oxide, and 0.1 to 1 wt% of iron phosphate.

The kaolin is kaolin, and the mixture of pumice, kaolin, octreol, and zeolite is mixed at a weight ratio of 1: 2: 0.5: 0.5, and the particle size of the pumice, kaolinite, octreol and zeolite is 200 to 300 mesh.

In the method of forming a product using the ceramic composition and then firing the product, the product is subjected to neutral salt baking at a temperature of 900 to 1000 ° C during the first firing after molding, and at a temperature of 1250 to 1350 ° C during the second firing after the transparent glaze, And firing.

According to the present invention, there is an advantage that the color of the celadon can be expressed through the ceramic composition rather than the glaze.

In addition, it is possible to reproduce the color of Goryeo celadon, which is advantageous in producing high value-added ceramics.

In addition, the produced ceramic has an advantage of having anti-corruption function.

1 to 2 are photographs of ceramics produced using the ceramic composition of the present invention.

Hereinafter, the present invention will be described in detail.

Conventional blue celadon, that is, the production of ceramics of a colorless color, was made through glaze, but when producing celadon through a glaze, not only the various metal salts contained in the glaze were not beneficial to the human body,

Accordingly, the present invention enables the coloring of celadon through the ceramic composition.

Before describing the present invention in detail, the ceramic composition of the present invention can be utilized as various kinds of building materials such as ceramics, tiles, and bricks as ornaments as well as life pots such as various bowls, It is possible to utilize it in both.

The ceramic composition according to the present invention is characterized by containing pumice and kaolin in a weight ratio of 1: 0.5 to 5.

Here, the pumice refers to a rock mass having a diameter of 4 mm or more in porosity when volcanic explosion occurs, and most of the pumice is vitreous. Since these pumices are light, it is possible to manufacture lightweight ceramics. In addition, when the pumice is mixed with the mordant, the characteristic color can be expressed in the ceramic.

The color of the color is due to the constitution of iron carbide and iron phosphate as well as titanium dioxide, alumina oxide, silicon dioxide and iron oxide contained in the pumice. That is, the pumice is composed of about 50 to 70 aluminum oxide (Al ₂ O ₃₎ is from about 5 to 20% by weight In addition to the% by weight is composed of silicon dioxide (SiO _2), titanium dioxide (TiO ₂₎ 0.1 to 3% by weight, and iron oxide of 2 to 12% by weight, and further includes iron carbide and iron phosphate. When the content of iron carbide and iron phosphate is not fixed but is about 1 to 5 wt% of iron carbide and about 0.01 to 0.5 wt% of iron phosphate, the appearance of a clear color of Goryo celadon due to the action of iron oxide, .

In other words, the above-mentioned hydrocarbons, iron oxides, and iron phosphates in the pumice are ionized with a large amount of bivalent iron and barium iron through thermal dissociation reaction during sintering, and coloration of a color can be achieved. When the content of iron oxide was adjusted to 3 to 5% by weight only, it was difficult to reduce all of the iron oxide (Fe ^{2 +} ) by the reducing power of carbon monoxide generated by incomplete combustion during firing, so that it was impossible to generate sufficient color. However, as described above, when iron carbide, iron oxide and iron phosphate are included, iron ionization is induced through interaction between iron carbide, iron oxide and iron phosphate, and color similar to that of Goryo celadon appears.

The iron carbide may be at least one of Fe ₂ C, Fe ₃ C, Fe ₂ C ₃ and Fe ₅ C ₂ , Iron may be at least one of iron monophosphate (FePO ₄ ) and iron phosphate (Fe ₃ (PO ₄ ) ₂ ), but the form thereof is not limited.

The content of the kaolin is preferably 60 wt% or more of silicate (SiO ₂ ), 2 wt% or less of iron oxide, 26 wt% or less of alumina (Al ₂ O ₃ ) , A content of calcium oxide (CaO) of 0.2 wt% or less and a content of potassium oxide (K ₂ O) of 1 wt% or less.

It is preferable that the mixing ratio of the pumice and the cement is 1: 0.5 ~ 5. If the cement paste is used in a small amount, the molding and firing of the ceramic are not easy and the coloring is not good. This is because the value as a listener becomes weaker.

In addition, the particle size of the powder of the cobalt and pumice is not limited, and usually 200 to 300 mesh, which is the particle size of the ceramic composition, is sufficient.

On the other hand, in addition to the above-mentioned pumice and kaolin, it may further contain an octene, a zeolite, or a mixture thereof. That is, when the above-mentioned jade, zeolite, or a mixture thereof is further included, not only the strength of the ceramic is increased, but also the color development of the color is further facilitated.

The above-mentioned jade and zeolite are all silicate minerals, while the jade belongs to the inosilicate minerals and the zeolite belongs to the dexosilicate minerals. The silicate mineral has SiO ₄ Ino The tetragonal quartzite is a fiber-like mineral with a tetrahedron connected in a straight line. The deoxysilicate mineral is a net-structured mineral with a SiO ₄ tetrahedron in a net shape. The minosartanite and tectosilicate minerals have many fiber- These residual fibers are advantageous in that the strength of the ceramic is excellent when baked.

In the present invention, it is preferable to mix the pumice, kaolin, octreol and zeolite at a weight ratio of 1: 2: 0.5: 0.5 in order to achieve color development most similar to the color of Goryo celadon. And the like, which are most suitable for ceramics.

The ceramic composition thus formed is molded in the same manner as in the ordinary ceramic molding, and then subjected to the first firing and the second firing after glazing. The ceramic composition of the present invention finally emits a cyan-green color after the second firing, and green is expressed after the first firing.

Here, the method of molding a product using the ceramic composition is performed by a known method, and a description thereof will be omitted.

The sintering method is preferably a neutral sintering at a temperature of 900 to 1000 ° C during the first sintering and a reducing sintering at a temperature of 1250 to 1350 ° C for the second sintering of the transparent glaze after the sintering. Green, and when the transparent glaze is sieved and subjected to secondary firing, a cyan color is expressed.

Herein, the neutral chlorination means that only a little oxygen is supplied to the inside of the furnace so that the flow of the internal flame is fixed, and the reduction chlorination means firing in which supply of oxygen into the furnace is cut off. For reference, the baking of oxide is a method of supplying sufficient oxygen to the inside of the kiln and firing it.

Further, in the present invention, any commercially available ceramic glaze can be applied if it is a transparent glaze other than a colored glaze.

Accordingly, the ceramic composition having the above-described structure can exhibit coloration after firing, reproduce the color of Goryeo celadon, and produce many fine pores, which is advantageous in producing high value-added ceramics.

In addition, it can be applied to various products such as building materials, living porcelain, and pottery art, as well as the functionality of anti-corruption is developed and utilized more easily.

Hereinafter, the present invention will be described in detail with reference to Examples.

(Example 1)

Pumice powders and kaolin were mixed at a weight ratio of 1: 0.5, and the specimens were molded and fired in a neutral salt (100 ° C) for 8 hours. After the transparent glaze was sintered, it was re-fired in a reducing salt (1300 ° C) for 8 hours.

The transparent glaze was purchased from a commercial company A and used.

The pumice powder contained 1.25 wt% of iron carbide, 10.12 wt% of iron oxide, and 0.08 wt% of iron phosphate at the time of component analysis.

Fig. 1 is a photograph of the prepared specimen.

(Example 2)

The procedure of Example 1 was repeated except that the pumice powder and the kaolin were mixed at a weight ratio of 1: 2.

Fig. 2 is a photograph of the prepared specimen.

(Example 3)

The procedure of Example 1 was repeated except that the pumice powder and the kaolin were mixed at a weight ratio of 1: 5.

(Example 4)

The same procedure as in Example 1 was carried out except that pumice powder, kaolin, and zeolite powder were mixed at a weight ratio of 1: 2: 0.5.

(Example 5)

The same procedure as in Example 1 was carried out except that the pumice powder, kaolin, and octal powder were mixed at a weight ratio of 1: 2: 0.5.

(Example 6)

The same procedure as in Example 1 was carried out except that pumice powder, kaolin, octol powder and zeolite powder were mixed at a weight ratio of 1: 2: 0.5: 0.5.

(Comparative Example 1)

The same procedure as in Example 1 was carried out except that the pumice powder and the kaolin were mixed at a weight ratio of 1: 0.3.

(Comparative Example 2)

The same procedure as in Example 1 was carried out except that the pumice powder and the kaolin were mixed at a weight ratio of 1: 6.

(Comparative Example 3)

The procedure of Example 1 was repeated except that only kaolin was used.

(Experimental Example 1)

The firing ceramics of Examples 1 to 6 and Comparative Examples 1 to 3 were observed by 10 evaluators, and the degree of similarity between the color-coded celadon and the color expression was expressed by 1 to 9 points (1 point: not similar to 9 The points are very similar.) The results are shown in Table 1 below.

Test Example 1 Results. division result Example 1 8.0 Example 2 8.5 Example 3 8.0 Example 4 8.5 Example 5 8.5 Example 6 9.0 Comparative Example 1 5.0 Comparative Example 2 5.5 Comparative Example 3 One

As can be seen from the above Table 1, Examples 1 to 6 according to the present invention were confirmed to have similar color to that of the colorless celadon celadon, but Comparative Examples 1 to 3 had low evaluation scores, .

(Test Example 2)

The porosity and bending strength of Examples 1 to 6 and Comparative Examples 1 and 2 were measured. Disc type specimens having a diameter of 1 inch were tested for porosity and bar type having a corrugated ratio of 5.0 × 0.8 × 0.8 cm. The porosity was measured according to KSL3114, and the bending strength was measured by three-point bending strength test.

The results are shown in Table 2 below.

Test Example 2 Results. division Porosity (%) Curvature (kg / ㎠) Example 1 17.251 301 Example 2 19.356. 356 Example 3 25.256 302 Example 4 20.892 385 Example 5 21.269 392 Example 6 21.562 452 Comparative Example 1 15.236 253 Comparative Example 2 28.125 205

As can be seen from the above Table 2, all of the embodiments of the present invention show appropriate levels of porosity and excellent curvature. In particular, the bending strengths of Examples 4 to 6, in which a stone and a zeolite were applied, were superior.

That is, the ceramic composition according to the present invention is capable of manifesting a color of color, and it is confirmed that micropores and strength at the time of firing are also suitable as ceramics and various applications thereof are possible.

Therefore, the ceramic composition of the present invention is not limited in its use, as it can be used as a building material such as a tile, a brick, and the like, as well as various living things and ceramic arts, as well as being excellent in color, .

(Test Example 3)

The anti-corruption functions of Examples 1 to 6 were tested. A circular bowl with a diameter of 10 cm and a height of 5 cm was used as a specimen, and a lid corresponding to the bowl was prepared and used. As a comparative example, only Comparative Example 3 was tested.

100 g of edible rice was stored in the specimens of the above-described Examples and Comparative Example 3, and then left to stand at 22 占 폚 for 30 days.

As a result, in Examples 1 to 6, only the fermentation mold was generated without odor. In other words, all of Examples 1 to 6 showed that only fermentation through the proliferation of beneficial bacteria was proceeded without corruption proceeding. On the other hand, in Comparative Example 1, as soon as the lid was opened, a bad odor was issued, and it was confirmed that the spore bacteria, which were not fermentative beneficial bacteria, were proliferated.

As can be seen from the above Test Example 3, the ceramic according to the present invention has a function of preventing corruption.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And it is to be understood that such modified embodiments are also within the scope of the present invention defined by the appended claims.

Claims (5)

delete delete Pumice and molybdenum in a weight ratio of 1: 0.5 to 5,
Wherein the pumice comprises 1 to 3% by weight of iron carbide, 1 to 5% by weight of iron oxide, 0.1 to 1% by weight of iron phosphate,
Wherein the pumice and the terephthalate further comprise an octole, a zeolite, or a mixture thereof. The method of claim 3,
Wherein the kaolin is kaolin, the mixture of pumice, kaolin, zeolite and zeolite is mixed at a weight ratio of 1: 2: 0.5: 0.5, and the particle size of the pumice, kaolinite, octreol and zeolite is 200 to 300mesh. Functional ceramic composition.
A method of molding a product using the composition of claim 3 or 4 and then firing the product,
Wherein the neutral baking is performed at a temperature of 900 to 1000 ° C. during the first baking after the forming, and the reducing baking is performed at 1250 to 1350 ° C. at the second baking after the transparent baking of the transparent glaze.

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