KR20120033371A - Process for preparing a ceramic glaze composition, glaze composition using the same and manufacturing method of ceramic products - Google Patents

Abstract

PURPOSE: A glaze composition for porcelain, a manufacturing method thereof, and a manufacturing method of crack-free color porcelain are provided to plasticize at low temperature by mixing Bismuth oxide powder with Boron oxide(B2O3) powder in a proper ratio. CONSTITUTION: A manufacturing method of a glaze composition for porcelain comprises the following steps: mixing 80-90 parts by weight of bismuth oxide powder and 10-20 parts by weight of boron trioxide powder with methyl alcohol in order to prepare a first composition(S10); preparing a second composition including hydraulic frit; mixing 50-60 parts by weight of the first composition, 40-50 parts by weight of the second composition, and pigments(S20); and adjusting CP(centipoise) to 1-3 by mixing the methyl alcohol with the mixture(S30). The particle size of the bismuth oxide powder is 1-9micro meters. The hydraulic frit has the particle size of 10-20micro meters. The hydraulic frit obligatorily includes SiO2, Al2O3, CaO,Na2O, Fe2O3, and BaO.

Description

Process for preparing a ceramic glaze composition, Glaze composition using the same and Manufacturing method of Ceramic products}

The present invention relates to a glaze composition which is painted on the surface of practical ceramics or art ware products mainly manufactured for cooking or storing food, and particularly, a method of preparing a magnetic glaze composition, and a glaze composition and The present invention relates to a method for producing a crack-free colored porcelain, and more specifically, does not contain harmful components, and can be applied to an object to sinter and fuse at a relatively low temperature during firing, and to produce porcelain of various colors without cracking. The present invention relates to a glaze composition for magnetic production.

In general, glaze is a thin glass layer adhering to the surface of porcelain, which lowers the absorbency of the porcelain, expresses the aesthetic feeling, and imparts strong strength to the porcelain. In other words, glaze is used to make the surface layer of porcelain or pottery, etc. and heat-treat and fusion to form gloss or matte surface layer on the surface. It is effective in eliminating permeability, increasing aesthetic effect and strengthening porcelain. Is to add.

Glazes that are painted on the surface of ceramics to give luster by firing are usually composed of feldspar, quartzite, limestone, photolist, talc, fluorite, bone meal, carboxymethylcellulose, and a small amount of pigment is added thereto.

However, among these components, the light list obtained by heating lead or lead oxide above 40 ℃ is not only harmful to human body, but also contaminates the working environment during the painting process, and also emits pollution in the air together with flue gas during the firing process. It is known to cause poisoning.

In addition, because the existing surface of the porcelain fine cracks are generated when using the food container there is a problem that the food is permeated to the surface is not washed well by the general detergent, etc., the cause of corruption when preserving other food in the container that is not well cleaned Also provided.

For this reason, in order to prevent micro cracks on the surface of porcelain, it was inevitable to make a dark heat-resistant magnetic.

On the other hand, the conventional pottery manufacturing process consists of preparation of a base material composition, shaping | molding, drying, a roasting, shiyu, firing, a chemical process, etc.

The holding composition is prepared by pulverizing a raw material of porcelain (soji) and kneading using an appropriate amount of water. Porcelain is molded from the base material composition thus prepared and dried.

Subsequently, the dried pottery is finished by first baking, then applying glaze on the surface and finishing the baking process.

In the above process, the firing process is the most important step in the pottery manufacturing process, and the baked material is baked until the luster is polished at a high temperature of 1,250 to 1,410 ° C.

However, in the conventional ceramics manufacturing, the energy cost required for the predetermined process occupies a very large proportion, and in particular, due to an increase in energy costs including oil prices, the burden on ceramics manufacturing is further increased.

The present invention for solving the problems described above, sintered and fused at a relatively low temperature even when firing the glaze composition is not contained harmful ingredients, through which it is possible to manufacture a crack-free porcelain At the same time, an object of the present invention is to provide a method for preparing a glaze composition for a magnetic, which can be applied to pigments of various colors, and a method for producing a glaze composition and a crack-free color porcelain accordingly.

Method for producing a magnetic glaze composition according to the present invention for achieving the above object, Bismuth oxide (Bismuth oxide) powder 80 to 90 parts by weight and boron trioxide (Boron oxide: B ₂ O ₃ ) powder 10 to 20 parts by weight Preparing a first composition by mixing with methyl alcohol and preparing a second composition including a glaze powder; Mixing 50 to 60 parts by weight of the prepared first composition with 40 to 50 parts by weight of the second composition and a pigment; And adjusting the viscosity (CP: centi poise) to 1 to 3 by mixing methyl alcohol in the mixed mixture.

On the other hand, another embodiment of the present invention comprises 80 to 90 parts by weight of bismuth oxide (Bismuth oxide) powder, 10 to 20 parts by weight of boron trioxide (Boron oxide: B ₂ O ₃ ) powder, glaze powder, pigment and methyl alcohol The viscosity is 1-3, The magnetic glaze composition characterized by the above-mentioned.

In addition, as another embodiment of the present invention, a method for producing a crack-free color porcelain, comprising the steps of molding the base composition, roasting first to prepare a substance; Applying a glaze composition to the prepared substance; And calcining the product coated with the glaze composition by heating to 450 to 500 ° C., wherein the glaze composition includes 80 to 90 parts by weight of bismuth oxide powder and boron trioxide (Bron oxide: B ₂ O). ₃ ) 10 to 20 parts by weight of powder, glaze powder, pigment and methyl alcohol are included, characterized in that the viscosity is 1 to 3.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the present invention described above, fundamentally solves the problems of conventional glazes containing harmful chemicals such as light list and a separate pigment, harmless to the human body without causing environmental pollution, and can use the natural beauty as much as possible There is an effect that can produce a glaze composition.

In addition, the present invention can provide a glaze composition that can be precisely sintered and fused in the firing process of the first roasted substrate, through which it is possible to produce porcelain without cracking, and to apply a pigment of various colors It can provide a manufacturing method and a non-uniform color porcelain manufacturing method.

In addition, the present invention it is possible to provide a glaze composition that can significantly reduce the energy cost and manufacturing cost by allowing the baking at a temperature significantly lower than the conventional firing temperature.

1 is a flow chart for explaining an example of a method of manufacturing a magnetic glaze composition according to the present invention,
2 is a flowchart illustrating an example of a method of manufacturing a crack-free color porcelain according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The invention may be better understood by the following examples, which are intended for purposes of illustration of the invention and are not intended to limit the scope of protection defined by the appended claims.

1 is a flow chart for explaining an example of a method of manufacturing a magnetic glaze composition according to the present invention, as shown here, the present invention comprises the steps of preparing the basic compositions for preparing the glaze composition (S10), and Mixing the prepared base composition and adding a pigment (S20), and adjusting the viscosity of the mixture is mixed (S30).

The present inventors used a material in which bismuth oxide (Bisuth oxide: Bi ₂ O ₃ ) powder and boron trioxide (Bron oxide: B ₂ O ₃ ) powder were mixed as base materials of the glaze composition, and the particle size and mixing ratio thereof were used. The present invention was completed after confirming that it was possible to obtain a glaze composition capable of firing at a significantly low temperature during use (by self-manufacturing) and producing crack-free porcelain by controlling the viscosity with a specific dispersant.

Hereinafter, a method of manufacturing the magnetic glaze composition according to the present invention, and a method of manufacturing the glaze composition and crack-free color porcelain according to the present invention will be described in detail.

Preparation of Glaze Composition

First, the present invention undergoes a step (S10) of preparing the basic compositions to prepare a glaze composition, for example, by mixing 80 to 90 parts by weight of bismuth oxide powder and 10 to 20 parts by weight of boron trioxide powder in methyl alcohol The first composition may be prepared, and the second composition including the glaze powder may be prepared.

Conventional glazes are usually based on feldspar, quartzite, limestone, light list, talc, fluorspar, bone meal, carboxymethylcellulose, and further include borate.

In comparison, the present invention is characterized by preparing bismuth oxide powder as a main component, mixing boron trioxide powder together and preparing it as a first composition, and separately preparing a conventional general glaze powder as a second composition. The order of preparing the first composition and the second composition is not particularly limited.

As used herein, the term "glaze powder" refers to a general glaze, glaze powder, or glaze composition which is conventionally made of feldspar or the like as described above. Thus, the glaze powder is SiO ₂ , Al ₂ O ₃ , CaO, Na ₂ O, Fe ₂ O ₃ And BaO may be essentially included. For example, in the present invention, the SnO, SiO ₂ , Al ₂ O ₃ , CaO, K ₂ O, Na ₂ O, Fe ₂ O ₃ , BaO, and TiO ₂ may each be 20. 25 to 40 to 45 to 10 to 15: 0.5 to 1.5: 0.1 to 1.0: 1 to 3: 0.5 to 1.5: 0.2 to 1.2: 1 to 10 were used in the weight ratio.

The first composition is characterized in that it comprises bismuth oxide as a first component, the bismuth oxide has a similar property to the boron trioxide has similar properties, but when used as a glaze composition has a significantly superior function than the boron trioxide It was confirmed that there is. If the amount of bismuth oxide is higher in the mixing ratio of the bismuth oxide and boron trioxide (when the amount of the boron trioxide is smaller), the stability of the glaze composition decreases, and if the amount is smaller (the amount of the boron trioxide) If more), the sintering and fusion at the time of baking are poor, and the baking at a higher temperature is required.

In addition, the present invention is characterized in that in mixing the bismuth oxide and boron trioxide powder, methyl alcohol is used as a dispersant, as opposed to conventional water, which is used when applying the glaze composition according to the present invention to a substrate. There is an effect that can improve the adhesive force by increasing the solvent absorption.

In addition, the bismuth oxide powder has a particle size of 1 ~ 9㎛, it is preferable that the glaze powder has a particle size of 10 ~ 20㎛. The boron trioxide powder also preferably has a particle size of 1 ~ 9㎛.

This is to enhance the effect of bismuth oxide and / or boron trioxide powder than the glaze powder, and the bismuth oxide and / or boron trioxide powder having a smaller particle size surrounds the glaze powder so that the mixing and fusing between powders is more excellent. Because it can be done. If each powder has a size smaller than the above, its functionality is inferior, and if the powder has a size larger than the above, cracks of the product cannot be effectively prevented.

In addition, the first composition has a viscosity of 100 to 150, and the second composition is a mixture of glaze powder and acrylic resin, and more preferably has a viscosity of 350 to 400. That is, it is preferable that the viscosity of the first composition is lower than the viscosity of the second composition, each of which enables subsequent smooth fusion between the first composition and the second composition. At the same time, since the viscosity of the glaze composition finally made can be easily adjusted by having the viscosity of the said range, it is preferable.

In addition, according to the present invention, the second composition may be to adjust the viscosity by adding one or more additives selected from the group consisting of an anti-wetting agent, an anti-dispersion agent and an anti-sediment flow agent to the acrylic resin in which the glaze powder is mixed. That is, in the first composition, the viscosity may be controlled through the amount of methyl alcohol used as the dispersant, but in the second composition, the viscosity may be controlled through the amount of the additive selectively added.

Next, the present invention is the step of mixing the prepared basic composition and adding a pigment (S20), specifically, 50 to 60 parts by weight of the prepared first composition and 40 to 50 parts by weight of the second composition and the pigment To mix.

The present invention is characterized by the first composition containing bismuth oxide, it is preferable that it contains more than the second composition consisting of a general glaze powder, it is particularly stable to have a good effect to be mixed in the above range.

Here, the pigment is preferably mixed in 5 to 10 parts by weight with respect to 100 parts by weight of the mixed composition of the prepared first composition and the second composition, if the amount of the pigment is less than this, the color is weak, if it is more than that the surface of the glaze is smooth. There is a disadvantage that the rough phenomenon appears. Pigments include everything known in the art without limitation.

Subsequently, the present invention undergoes step S30 of adjusting the viscosity of the mixture in which the pigment is mixed. That is, by mixing methyl alcohol in the mixed mixture to adjust the viscosity (CP: centi poise) to 1 to 3.

The use of methyl alcohol as the dispersant is because, as described above, the adhesive force can be easily improved by increasing the solvent absorption power when applying the glaze composition according to the present invention to the substrate.

In addition, the viscosity of the final glaze composition is suitable for producing a product free from cracking even if fired at a relatively low temperature in the above range.

On the other hand, another embodiment of the present invention may be a magnetic glaze composition prepared according to the method for producing a magnetic glaze composition as described above, the glaze composition is bismuth oxide powder 80 ~ 90 parts by weight, boron trioxide powder 10 ~ 20 parts by weight, glaze powder, pigment and methyl alcohol, the viscosity is characterized in that 1-3.

The glaze composition is characterized in that it contains bismuth oxide as a main component, a detailed description thereof is as described above. Glaze composition according to the present invention may include all of the features described in the manufacturing method as described above.

In particular, the glaze powder is preferably contained within the range of 40 to 50 parts by weight with respect to 50 to 60 parts by weight of the powder mixed with the bismuth oxide powder and boron trioxide powder, as described above is preferable because it has the most stable and excellent effect Do.

In addition, the pigment is also mixed in about 5 to 10 parts by weight based on 100 parts by weight of the powder mixed with the bismuth oxide powder, boron trioxide powder and glaze powder, as described above to prevent the roughness of the surface It is preferable because it has the effect that it can.

Such a glaze composition for self-manufacturing according to the present invention does not contain harmful components, and can be applied to a substance to be sintered and fused at a relatively low temperature even when firing, thereby producing porcelain of various colors without cracking. will be.

Manufacture of porcelain

Figure 2 is a flow chart for explaining an example of a method for manufacturing a crack-free color porcelain according to the present invention, as shown here, the present invention comprises the steps of preparing a product for manufacturing porcelain (S110), and the prepared article The step of applying the glaze composition according to the present invention (S120), and the step of heating and baking the substance coated with the glaze composition (S130) is made.

The present invention is characterized in using the glaze composition according to the present invention having the characteristics as described above, during the application process for applying the glaze composition. That is, by using a glaze composition containing bismuth oxide as a main component, it can be sintered and fused without cracking even at a relatively low temperature during firing, thereby reducing the energy cost and manufacturing cost.

Specifically, in the method for producing a crack-free color porcelain according to the present invention, first, the base material is molded, and the initial baking is carried out to prepare a material (S110).

In other words, the heat-resistant base material is molded and then completely dried to be first baked. For example, in the case of using a kiln using electricity as a heat source, the heating ascending rate is heated not to exceed 300 ° C / h, and maintained at 850 ° C for 30 to 1 hour, followed by sintering temperature (about 1230 ° C to 1260). It is preferable to keep it for 1 hour or more and then slowly cool it. And when using a kiln which uses gas as a heat source, it is preferable to raise to a sintering temperature mentioned above by making a heating up rate 200 degreeC / h, and to bake by a reduction baking method.

In the above method, if the temperature rise rate is faster than the above, breakage of the material or poor plasticity occurs and the magnetization of the base is unstable. This can cause cracks.

Next, the step of applying the glaze composition to the prepared substance (S120). The glaze composition is 80 to 90 parts by weight of bismuth oxide (Bismuth oxide) powder, 10 to 20 parts by weight of boron trioxide (Boron oxide: B ₂ O ₃ ) powder, glaze powder, pigment and methyl alcohol, the viscosity is It is characterized by being 1 to 3.

For example, it is preferable to apply the glaze composition which concerns on this invention to the thickness of 20-50 micrometers by the spray method, preheating the substance prepared as mentioned above to 30-60 degreeC. If the coating thickness is thinner than that, the desired color does not appear uniformly. If the thickness is thicker than that, the surface of the glaze is formed in a boiled state upon firing and the hardness is significantly lowered.

Subsequently, the product coated with the glaze composition is subjected to baking by heating to 450 to 500 ° C. (S130).

The base coated with the glaze composition as described above is preferably maintained at 40 ° C. to 60 ° C. for at least 10 minutes to dry the glaze composition, and then sintered at 450 ° C. to 500 ° C. while keeping the temperature rise rate at 300 ° C./h or less. And fusion.

In the case of using the glaze composition according to the present invention, it is preferable to maintain the firing temperature as described above. This is because a change over time may occur, and reaggregation of the powder may also occur.

According to this self-manufacturing method, since the temperature constituting the firing point of the glaze does not affect the base material composition or the base material at all, it is possible to eliminate the cause of cracking caused by the difference in shrinkage and expansion ratio between the base (base) and the glaze. When firing using a general glaze, usually yielding and transition sintering at 900 ℃ or more, and because of this, the thermal expansion coefficient between the body (substrate) and the glaze was not suitable, a fine crack occurred.

However, according to the present invention as described above, anyone can easily fuse the glaze surface without uniform microcracks, so that all the desired color from the white can be easily and easily implemented, the residue of the food even when washing after cooking and use It can be easily removed without being absorbed by the material, thereby reducing stains and soot.

Example

Dry powder having a particle size of 9 μm or less with bismuth oxide (Bi ₂ O ₃ ) with a purity of 99.0 wt /% or more, and a particle size of 9 μm or less with B ₂ O ₃ with a purity of 95.0 wt /% or more. Eggplant was prepared by mixing a powder of a solid type 85:15 ratio by weight. The mixed powder of Bi ₂ O ₃ and B ₂ O ₃ thus mixed was put into methyl alcohol, and the viscosity (cp) was adjusted to 100 to 150 and aged for 24 hours.

In addition, as a glaze powder, SnO, SiO ₂ , Al ₂ O ₃ , CaO, K ₂ O, Na ₂ O, Fe ₂ O ₃ , BaO and TiO ₂ having a particle size of 18.5 μm or less were used. A second composition was prepared by mixing in a weight ratio of 0.5: 2: 1: 10.6: 5. The glaze powder thus prepared was mixed with a heat-drying acrylic resin, and the viscosity (CP) was adjusted to 350 to 400 while further adding an aromatic wetting agent, a dispersion inhibitor, and a precipitation preventing agent.

Then, the Bi ₂ O ₃ The mixed powder of B ₂ O ₃ and the glaze powder were added to 3 mille at a weight ratio of 55:45 and sufficiently mixed. A pigment was further added thereto, and methyl alcohol was added to adjust the viscosity (cp) to 1 to 3 to prepare a glaze composition according to the present invention.

On the other hand, using the glaze composition prepared above was prepared porcelain in the following manner.

That is, the base material which shape | molded the holding composition in the shape of casserole was primed with kiln using electricity as a heat source. The heating rate of rise did not exceed 300 ° C / h, was maintained at 850 ° C for 30 minutes, and maintained at about 2 hours at the sintering temperature (about 1230 ° C ~ 1260 ° C), and then slowly cooled slowly.

The heat-resistant porcelain thus prepared was preheated to about 45 ° C., and the glaze composition thus prepared was applied to a thickness of 20 to 50 μm by a spray method.

Then, it was dried at about 50 ° C. for 30 minutes, and after drying, it was calcined with a kiln again using electricity as a heat source. The temperature increase rate after drying was below 300 ℃ / h, and sintered and fused at about 450 ~ 500 ℃ for about 2 hours.

The porcelain thus produced had a surface absorption rate and porosity close to 0.0%, thereby confirming almost no cracking.

However, as a comparative example, in the case of porcelain obtained by applying a glaze composition containing a conventional general glaze powder without bismuth oxide powder (the first composition) and firing it at 450 to 500 ° C, the surface absorption rate and porosity is 1.0%. As a result, the glaze was not sintered and fused properly at low temperature firing.

On the other hand, while the present invention has been shown and described with respect to certain preferred embodiments, the invention is variously modified and modified without departing from the technical features or fields of the invention provided by the claims below It will be apparent to those skilled in the art that such changes can be made.

The present invention does not contain harmful components, and can be applied to a substance to be sintered and fused at a relatively low temperature even when firing, and to provide a glaze composition for producing a porcelain that can produce porcelain of various colors without cracking. Can be.

Claims (9)

80 to 90 parts by weight of bismuth oxide powder and 10 to 20 parts by weight of boron oxide (B ₂ O ₃ ) powder are mixed with methyl alcohol to prepare a first composition, and a second composition containing a glaze powder Preparing a;
Mixing 50 to 60 parts by weight of the prepared first composition with 40 to 50 parts by weight of the second composition and a pigment; And
Mixing methyl alcohol to the mixed mixture to adjust the viscosity (CP: centi poise) to 1 to 3; manufacturing method for a magnetic glaze composition comprising a.
The method of claim 1, wherein the bismuth oxide powder has a particle size of 1 to 9 μm, and the glaze powder has a particle size of 10 to 20 μm.
The method of claim 1, wherein the glaze powder is SiO ₂ , Al ₂ O ₃ , CaO, Na ₂ O, Fe ₂ O ₃ And BaO essentially.
According to claim 1, wherein the glaze powder is SnO, SiO ₂ , Al ₂ O ₃ , CaO, K ₂ O, Na ₂ O, Fe ₂ O ₃ , BaO and TiO _{2 It} is 20-25: 40-45: 10 15: 0.5-1.5: 0.1-1.0: 1-3: 0.5-1.5: 0.2-1.2: The manufacturing method of the magnetic glaze composition characterized by mixing at the weight ratio of 1-10.
The method of claim 1, wherein the first composition has a viscosity of 100 ~ 150,
The second composition is a glaze powder is mixed with an acrylic resin, the method of producing a magnetic glaze composition, characterized in that it has a viscosity of 350 ~ 400.
The magnetic composition of claim 5, wherein the second composition is prepared by adding at least one additive selected from the group consisting of an anti-wetting agent, an anti-dispersion agent and an anti-sediment flow agent to the acrylic resin in which the glaze powder is mixed. Method for preparing the glaze composition.
The method of claim 1, wherein the pigment is mixed with 5 to 10 parts by weight based on 100 parts by weight of the prepared composition of the first composition and the second composition.
Bismuth oxide (Bismuth oxide) powder 80 to 90 parts by weight, boron trioxide (Boron oxide: B ₂ O ₃ ) powder 10 to 20 parts by weight, including glaze powder, pigment and methyl alcohol,
The viscosity of the magnetic glaze composition, characterized in that 1-3.
Shaping the holding composition (초 地), and roasting the first to prepare a substance;
Applying a glaze composition to the prepared substance; And
It comprises a step of baking by heating the article to which the glaze composition is applied to 450 ~ 500 ℃;
The glaze composition is 80 to 90 parts by weight of bismuth oxide (Bismuth oxide) powder, 10 to 20 parts by weight of boron trioxide (Boron oxide: B ₂ O ₃ ) powder, glaze powder, pigment and methyl alcohol, the viscosity is A method for producing a crack-free color porcelain, characterized in that 1 to 3.

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