KR100829487B1 - Manufacturing method of porcelain tile and porcelain tile manufactured therefrom - Google Patents

Abstract

The present invention relates to a method for producing a thin yet high-strength porcelain tile suitable for use as a peritoneum in crypts, etc. (1) 10 to 20 parts by weight of silica, 15 to 25 parts by weight, 10 to 20 parts by weight of clay 15 to 25 parts by weight of clay and 0.1 to 0.45 parts by weight of a peptizing agent and 32 to 34 parts by weight of water to prepare 100% by weight of the base material containing feldspar as a residual preparation slip preparation step; (2) an injection step of injecting the slip obtained in the slip preparation step into a casting mold manufactured in the shape of a tile to be manufactured; (3) Molding in which the casting mold having completed the injection step is allowed to absorb moisture by leaving the casting mold for 5 to 20 minutes until all of the lamination layers are filled so that solid content in the slip is deposited on the inner wall of the casting mold to form a lamination layer. step; (4) a separation step of separating the separation layer from the mold for casting; (5) a primary firing step of first firing the separation layer separated in the separation step for 30 to 90 minutes at a temperature range of 850 to 950 ° C. on the separation plate; And (6) applying a glaze to the first fired calcined product and performing a second firing step for 30 to 90 minutes in a temperature range of 1200 to 1300 ° C .;

Porcelain, slip, casting, peptizing agent, sodium silicate, glycerin, alginate, polyvinyl alcohol.

Description

Manufacturing method of porcelain tile and porcelain tile manufactured therefrom

The present invention relates to a method for producing a magnetic tile and to a magnetic tile obtained therefrom. More particularly, the present invention relates to a method for producing a thin and high strength magnetic tile suitable for use as a peritoneum in crypts and the like and a magnetic tile obtained therefrom.

Korea's funeral culture has become a simplification due to the recent establishment of the Ossuary Party, with grave social issues such as lack of graveyard space, severe land damage and encroachment of land, damage to surrounding landscape and ecological environment caused by securing graveyard space.

However, each funeral method is a custom established over a long time in geography, history, and social background, and it is still difficult to make cremation at Bongbun cemetery in one day and place it in the ossuary. Prefers to finish the circumference of the bonbon with stone (aka `` stone '').

As a result, ancestors enshrined in the ossuary are to be displayed as a way to provide space in the ossuary to enclose several ossuary jars at the same time. The development of excellent magnetic tiles is required. In particular, the manufacture of thin and high-strength magnetic tiles suitable for use as peristones in the ossuary, etc., is nowadays settled in the ossuary culture due to the increase of population and the decrease of burial places. There is still a need for the development of magnetic tiles to enable a large number of urns within a limited ossuary.

Pottery was originally a compound word of pottery and porcelain. Raw materials used in ceramics include inorganic materials such as clay, feldspar, quartzite, and pottery, and these products are made by molding alone or mixed and then hardening by applying heat. Pottery includes porcelain, stoneware, pottery, and earthenware. Among them, earthenware is made from prehistoric comb-like earthenware, bronze age, munmun earthenware, Hongdo, Heukdo, soft earthenware of saturation and Wonsamguk period, gray-blue hard earthenware of Three Kingdoms and Unification Silla, earthenware of Korea, and earthenware of Joseon. The surface of the vessel up to and including all lines without glazing. As a rule, the manufacture of these pottery is done through a relatively simple process from molding to blasting, while porcelain such as celadon, white porcelain, and powdered blue pottery should be glazed on the surface of a bowl and finished with reduced salt blasting at high temperature above 1,250 ℃ in the kiln. High manufacturing skills are required. As such, pottery and porcelain are different from each other in the presence or absence of glaze, soil, temperature, and kiln structure.

Pottery is the raw material of porcelain (素 地) is a large absorption rate, because when you tap it makes a muddy sound and baked at a low temperature, the durability is relatively weak, and often poisonous or earthenware.

The porcelain has almost no water absorption, and when it is struck, it produces a clear sound like metal and is fired at more than 1,000 ℃, unlike ceramics, which is excellent in durability, and is widely used for tableware and decoration.

The classification varies depending on the country or scholar, but in Korea, pottery is generally divided into four types: porcelain, earthenware, stoneware, and clayware. In the present invention, the porcelain is not particularly distinguished by ordinary people, and is often referred to as porcelain, and although it is expressed as porcelain, it should be interpreted to include porcelain in a general sense.

Porcelain is calcined and sintered at a high temperature of 1,300 ~ 1,500 ℃. Normal porcelain is clay, quartz, feldspar, and special porcelain is called special porcelain. . The body of a common porcelain is usually white, glassy, almost absorptive, light-transmissive, and metallic. The mechanical strength is large, and the fracture surface becomes shell shape. Glazes often use lime oil or talc oil, and are poor conductors of electricity. It is excellent in strength as well as chemical corrosion resistance and heat resistance. Special magnets are made of materials of different composition from ordinary magnets, such as oxide magnets, zircon magnets, alumina magnets, and lysian magnets, and are developing rapidly with the development of science and the needs of the times. In order to obtain the composition, microstructure, physical properties, chemical properties, the relationship with the electrical properties, the development of molding and processing technology, identification is very important product.

The distinction between earthenware and pottery is usually distinguished by whether it is coated or baked, but not necessarily.

The raw materials of porcelain are kaolin, quartzite, feldspar, and the like, and when pottery is used, the porcelain can be made even as sweet rice, but it is usually plastic clay and magnetization necessary for molding. 20% of feldspar is added to help with (瓷器 化). Glaze is transparent in feldspar oil, lime oil and ash oil, but color oil is sometimes used. It is largely classified into plastic raw materials (clay), non-plastic raw materials (silicite), commerce raw materials (feldspar) and glaze raw materials. Clay is a feldspar rock that has been altered by weathering, and includes primary clay (residual clay) remaining near its original location and secondary clay (target clay) drifted away by water. Primary clays are grainy and lack plasticity, but contain less impurities such as iron. Secondary clays are multicolored and rich in plasticity, but they are mostly colored because they contain iron or organic matter. Kaolin is a primary clay mainly composed of kaolinite, which has little plasticity but is white and has a high degree of fire resistance. In Korea, kaolin is mainly produced. Secondary clays are finely particulate, low in quartz content and the most plastic of clay raw materials because they are drifted away and deposited.

The manufacturing process of ceramics can be generally divided into preparation, molding, drying, firing, glaze iron, and vegetarian food of sojito.

(1) Preparation of Sojito: When using only one raw material, dry sojito may be crushed well and kneaded well with an appropriate amount of water. There are dry and wet methods, and the appropriate method is selected according to the nature of the raw material, processing method, and purpose of use. Dry mix is finely crushed and mixed by weighing the required amount from each raw material into the balance. At this time, add an appropriate amount of water and mix well to make a uniform mixing. It was mainly used to prepare sojito for tile by conventional methods. Wet is mainly used in the case of white porcelain or porcelain, and mixes the clay and the finely divided raw materials with appropriate amount and mixes them into water and make it into two sheets using water to stir well. do. In addition to this method, in recent years, a large amount of water is prepared by weighing the required amount of clay and the appropriate amount of clay by roughly crushing and intermediate-crushing bulk raw materials with a jaw crusher or a flat mill. The method is mainly used in a ball mill and mixing at the same time as fine grinding. The ball mill is attached with a silica or porcelain block on a cylindrical inner surface of a thick iron plate, and a printing sphere is put therein, and the raw material and water are rotated so that the grinding and mixing of the raw materials can be performed at the same time. In recent years, there is a rubber plate instead of a built-in stone inside the barrel. Grinded and mixed in a ball mill is filtered through a sieve, passed through a deaerator to remove iron, then transferred to a concrete tank, stirred and pumped to a strainer for dehydration. The dehydrated sojito is kneaded again using a vacuum grinder, the air mixed in the sojito is removed and stored for a certain period of time. Modern, large-scale factories use high-performance vacuum drills, and often use the sojito from these drills.

(2) Forming: Four methods of forming ceramics are important: jiggering, casting (also called slip casting), plastic forming by extruding, and pressing. The spinning wheel molding is a method of forming a spinning wheel by using clay that is won in a vacuum drill, and there are hand spinning wheel molding and mechanical spinning wheel molding. Hand spinning involves placing clay on a spinning wheel and spinning it to form a shape. It is inefficient and rarely used industrially, but it is still used a lot in craft molding. Mechanical spinning wheel is to put the clay on the plaster mold and to rotate the spinning wheel to be molded between the mold and the spatula, which is the most used method for the manufacture of tableware and containers.

This method is also a manual method other than the use of mechanical spinning wheels, and an automatic mechanical spinning wheel system has been recently adopted in which the entire process is mechanized by automating the operation from clay to complete molding. Injection molding is made by adding water to clay or small support materials and winning by kneading by hand. When water is added again, the dough becomes fluid and can be easily transferred to another container by tilting the container. When water is added again, fine particles are suspended in water and have a liquid-like property. Such a thing is called an extension or slip. The method of injecting the mold into the plaster mold is called injection molding. When the sheet is injected into the plaster frame, the plaster frame draws the powder suspended in the water together with the water to the surface of the mold, and the attracted water diffuses and absorbs inside the plaster. Occurs. Over time, this layer hardens and thickens. If the thickness of this hardened sheet is moderate and then the remaining sheet is poured out, only the layer of hard sheet is attached to the plaster frame. As the dehydration layer attached to the plaster mold becomes dehydrated and becomes harder, the molded body remains when the plaster mold is pulled out. Such injection molding is mainly used to mold complex and precise objects that are difficult to form by other methods. Extrusion is a kind of plastic or plastic molding which is formed by clay containing water in a state that can be made by hand. The water content is usually 15 to 25%. It is a method suitable for mass production in which such clay is extruded by an extrusion device such as a vacuum pulverizer and continuously molded. It is possible to mold uniform cross sections, that is, circular cross sections, semi-circles, and polygons. What is difficult in a one-stage extrusion with a small cross section is two-stage extrusion, and shaping | molding may be completed by turning again what was extruded in the semi-dry state or the dry state. Press molding is a method of pressurizing the clay using a press and a mold. However, this method is mainly used for molding with less plastic than semi-dry plasticity, and most commonly uses friction presses and hydraulic or hydraulic presses.

(3) Drying: The molded product should be dried to remove moisture and give strength to refill kiln, and to fire quickly without risk. The first step of drying the molding is the removal of water, which serves as a lubricant for the clay particles. The evaporation of water occurs at the surface, and the gaps between the clay particles are irregular, but they are capillaries, so the water inside is moved to the surface through these capillaries and continues to evaporate. Therefore, the more plastic particles containing a lot of fine particles, the thinner the capillary tube takes longer to dry. In this way, as the moisture of the clay particles slide out, the clay particles approach the volume and shrink and continue to shrink. However, when larger particles come into contact with each other, shrinkage is almost complete. At this time, the running water is called shrinkage water, and should be especially careful about drying up to this time. The water in the remaining gaps also evaporates and runs away, with very little shrinkage occurring, and where the water runs away there is a gap. Finally, the removal of the water film adsorbed on the surface of the particles. However, this water has a large surface area (surface area) but is strongly adsorbed on the particles, so it should be dried at a considerably high temperature. Especially, the smaller the particles, the harder it is to dry. As a result, the most careful process in the drying process is the step of evaporating the shrinkage water, that is, the drying process accompanied by the shrinkage phenomenon. Various types of drying devices are used, such as ondol type, box type and tunnel type. In the box type, the water jet dryer, which has a drying shelf, is often used. It is a device that blows air, which is adjusted to the optimum drying conditions, through a plate with a large number of injection holes, and blows it vertically through the dry object. The hot air tunnel kiln using waste heat in the kiln for kiln is most commonly used as a tunnel type, and it draws about 140 ° C of hot air from one side of the kiln and releases it from the other.

(4) Xiyu (施釉): Glaze is also called Yu, and lacquer is called shiyu or glaze lacquer. Seed oil is intended to enhance the aesthetic decoration effect by giving luster to the surface of the body to enhance the aesthetic decoration effect and to prevent contamination by smoothing the surface, and to increase the resistance to water or chemicals by removing the absorbency. For greater aesthetics, you can sculpt the material, use paint to paint, text, and other colors (called sketches, underlays, or patterns) before applying the glaze, or on the glaze. The method of vegetarianism using color oil or coloring is used. The glaze melts when it is coated on the substrate and melts to adhere to the base. If the base does not match the expansion or contraction rate of the base, a glaze is formed or the glaze falls off. It is classified into soft oil and light oil according to melting temperature, and soft oil is widely used in pottery. Especially, lead glaze which has a lot of lead soluble at low temperature is called lead glaze. Light oil is mainly used for porcelain, and opaque oil is appropriately mixed with arsenic acid, antimony, tin, zinc, titanium, bone ash, etc. according to the purpose. Color oil is a glaze colored by adding cobalt, chromium, iron, copper, nickel, manganese, etc. or an appropriate amount of inorganic pigments, which serve as inorganic pigments to all glazes. In addition, the pigment for the picture above is a color oil fused at low temperatures. The commonly used oiling method is a immersion method, in which a glaze is made into two sheets, molded into this sheet and soaked in dried or prime roasted beef, and coated on the surface of the body using the absorbency of the beef. At this time, the thickness of the glaze depends on the absorption rate of the base, the concentration of two sheets, and soaking time. Spraying using compressed air is used for the base material (such as pieces) or the thickness of the base material with irregularities on the surface. Recently, spraying is mainly used for oils such as tiles or sanitary ware.

(5) Coloring: As a coloring method of porcelain, decorative molding method of the body, the method of coloring paper, the method of coloring the whole or part of the body, the method of glazing, the method of sketching, the method of painting in glaze and the oil phase There is a method for coloring in.

(6) Firing: Firing is the most important step in the manufacturing process of porcelain, and there are some differences depending on the material, glaze, shape, size, use, or type of kiln, fuel, firing temperature, flame, etc. (biscuit fire), gloss fire (decorative fire), coloring fire (decorating fire).

Slip casting is one of the molding and casting methods of metals and ceramics. After the slip is prepared by mixing the powder and the dispersion medium, it is formed by using the capillary force (osmotic pressure) of the gypsum mold, and the dry density of the molded body can obtain about 60% or more of the theoretical density, and the complex shape can be formed. There are features that can be. Originally used for the manufacture of pottery, in recent years, it may be used also as a molding method of metal powder. The metal or ceramic powder is dissolved in a liquid such as water, brought into a fluid state, poured into a mold and allowed to stand for a while, followed by removal of moisture as a supernatant liquid or plaster mold. A powder molded article is obtained by absorbing and removing it in a form. This is heat-sintered to form a solid molded article.

In addition, the manufacturing technology of the thin ceramic substrate by the tape casting molding method has been developed from the manufacturing technology of the ceramic substrate for the IC package in the semiconductor industry, and has been studied by the fine ceramic molding method, but the ceramic porcelain slip material, which is a raw material of the traditional magnetic material There was no attempt to form a thin substrate by applying.

In the case of tiles, in most cases, the molding is performed by a pressing method, and the thickness of the tiles produced therefrom should be maintained to a certain thickness suitable for the molding operation, so that ceramic tiles having a thickness of less than 2 mm There are no examples produced both at home and abroad, and in particular, it is a technique that has not been attempted because it requires very difficult process technology not only for thinner thin-film tiles but also for firing technology.

As mentioned above, the manufacture of porcelain is a technology that has been used to manufacture various products such as daily necessities, ornaments, etc. in human history from a long time ago to the present, and the development of various technologies and various products are obtained accordingly. However, there is still a demand for new products that use magnetism.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a thin and high strength magnetic tile suitable for use as a peritoneum in crypts and the like, and a magnetic tile obtained therefrom.

The method for producing a magnetic tile according to the present invention includes (1) 10 to 20 parts by weight of silica, 15 to 25 parts by weight of pottery stone, 10 to 20 parts by weight of clay, 15 to 25 parts by weight of clay, and a feldspar as the remaining amount. A slip preparation step of preparing a slip for preparing a tile by mixing 0.1 to 0.45 parts by weight of a peptizing agent and 32 to 34 parts by weight of water with respect to 100 parts by weight; (2) an injection step of injecting the slip obtained in the slip preparation step into a casting mold manufactured in the shape of a tile to be manufactured; (3) Molding in which the casting mold having completed the injection step is allowed to absorb moisture by leaving the casting mold for 5 to 20 minutes until all of the lamination layers are filled so that solid content in the slip is deposited on the inner wall of the casting mold to form a lamination layer. step; (4) a separation step of separating the separation layer from the mold for casting; (5) a primary firing step of first firing the separation layer separated in the separation step for 30 to 90 minutes at a temperature range of 850 to 950 ° C. on the separation plate; And (6) applying a glaze to the first fired calcined product and performing a second firing step for 30 to 90 minutes at a temperature range of 1200 to 1300 ° C.

In the slip preparation step of (1), the peptizing agent may be an aqueous solution of sodium silicate in a sol state having a concentration of 60%.

0.2 to 1.0 parts by weight of glycerin may be further included in 100 parts by weight of the slip obtained in the slip preparation step of (1).

0.1 to 0.3 parts by weight of a polyvinyl alcohol solution at a concentration of 5% by weight may be further included in 100 parts by weight of the slip obtained in the slip preparation step of (1).

Defoaming step of applying a vacuum to the slip; may be further performed. The defoaming step may be performed by applying a vacuum of 10 ^-1 to 10 ^-3 torr for 5 to 15 minutes per 10 liters of the slip.

In the injection step of (2), the alginate solution of a concentration of 15% by weight may be applied to the inner wall of the casting mold.

Injection of the slip in the injection step of (2) may be injected through a rubber funnel connected to the casting mold.

After the separation step (4), the obtained molding may be further carried out a drying step of drying for 20 to 30 hours in the shade.

After performing the first firing step (5), the water-repellent coating step of applying a water repellent to the fired product before the application of glaze; may be further performed.

After performing the first firing step (5), the transfer step of attaching a conventional transfer paper printed pictures or drawings, heat treatment for 30 to 90 minutes at a temperature range of 800 to 900 ℃; can be further performed.

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

The method for producing a magnetic tile according to the present invention includes (1) 10 to 20 parts by weight of silica, 15 to 25 parts by weight of pottery stone, 10 to 20 parts by weight of clay, 15 to 25 parts by weight of clay, and a feldspar as the remaining amount. A slip preparation step of preparing a slip for preparing a tile by mixing 0.1 to 0.45 parts by weight of a peptizing agent and 32 to 34 parts by weight of water with respect to 100 parts by weight; (2) an injection step of injecting the slip obtained in the slip preparation step into a casting mold manufactured in the shape of a tile to be manufactured; (3) Molding in which the casting mold having completed the injection step is allowed to absorb moisture by leaving the casting mold for 5 to 20 minutes until all of the lamination layers are filled so that solid content in the slip is deposited on the inner wall of the casting mold to form a lamination layer. step; (4) a separation step of separating the separation layer from the mold for casting; (5) a primary firing step of first firing the separation layer separated in the separation step for 30 to 90 minutes at a temperature range of 850 to 950 ° C. on the separation plate; And (6) applying a glaze to the first fired calcined product and performing a second firing step for 30 to 90 minutes in a temperature range of 1200 to 1300 ° C .;

The slip preparation step of (1) is to prepare a slip for forming a magnetic tile into a thin tile by slip casting according to the present invention, 10 to 20 parts by weight of silica, 15 to 25 parts by weight, clay 10 to 20 parts by weight, 15 to 25 parts by weight of clay, and 0.1 to 0.45 parts by weight of a peptizing agent and 32 to 34 parts by weight of water are mixed with respect to 100 parts by weight of feldspar containing feldspar to prepare a slip for tile production. Is done. The base is the same as or similar to the base for the manufacture of ceramics, in particular, the base used in the present invention is characterized in that the ratio of feldspar can be particularly increased in order to prevent warpage during the manufacture of the thin ceramic tiles. In the present invention, in particular, the content of the feldspar may be adjusted to include 20 to 40 parts by weight, most preferably 28 to 32 parts by weight of the 100 parts by weight of the base. The content of feldspar in the substrate serves to prevent warpage of the fired tile by causing the tile to be fired according to the amount of feldspar to cause a fine softening phenomenon when the molded tile is fired. When the feldspar is used in less than 20 parts by weight, there may be a problem that the softening phenomenon to the tile of the bar as described above is insufficient so that the function of preventing warpage is insufficient, and when the feldspar exceeds 30 parts by weight, secondary firing There may be a problem that the tile sticks to the separation plate at temperature.

In the manufacture of the slip, when the peptizing agent is used in less than 0.1 parts by weight or more than 0.45 parts by weight based on 100 parts by weight of the slip, the viscosity of the slip is not sufficiently lowered, slip aggregation occurs to narrow Slip injection into the mold for casting the gap is not easy, there may be a problem that the molding is not made well.

In the slip preparation step of (1), the peptizing agent may be an aqueous solution of sodium silicate in a sol state having a concentration of 60%.

100 parts by weight of the slip obtained in the slip preparation step of (1) may further include 0.2 to 1.0 parts by weight of glycerin. The glycerin functions to prevent moisture absorption during slippage in the casting mold, which will be described later, from occurring too quickly, thereby preventing the slippage from hardening before the slip injection is completed. When the glycerin is used in less than 0.2 parts by weight, there may be a problem that the function to prevent the stiffness of the slip as described above is not sufficient, on the contrary, if the glycerin exceeds 1.0 parts by weight, the adhesiveness of the slip increases to increase the layer This may not be smoothly generated and the desorption from the mold is not smooth, there may be a problem that the drying time becomes very long even after the desorption.

In addition, 0.1 to 0.3 parts by weight of a polyvinyl alcohol solution at a concentration of 5% by weight may be further included in 100 parts by weight of the slip obtained in the slip preparation step (1). The polyvinyl alcohol has an object of the present invention to obtain a thin magnetic tile, the thin magnetic tile has a function of reinforcing the fragile after drying, weak strength and before firing. When the polyvinyl alcohol solution is used in less than 0.1 parts by weight, there may be a problem that the reinforcing function is insufficient after drying as described above, on the contrary, when the polyvinyl alcohol solution exceeds 0.3 parts by weight, the viscosity and adhesiveness of the slip is increased to increase There may be a problem that layers are not created smoothly.

Defoaming step of applying a vacuum to the slip obtained in the slip preparation step of (1); may be further performed. The defoaming step may be performed by applying a vacuum at a pressure of 10 ⁻¹ to 10 ⁻³ torr for 5 to 15 minutes per 10 liters of the slip. If defoaming is carried out at a pressure of less than 5 minutes or less than 10 ^-1 torr in the above, there may be a problem that the defoaming is not enough to cause pores in the tile obtained, on the contrary more than 15 minutes or 10 ^-3 torr If exceeded, expensive equipment for maintaining a vacuum may be required, resulting in an increase in production costs.

The injection step (2) consists of injecting the slip obtained in the slip preparation step into a casting mold manufactured in the shape of a tile to be produced. In the casting mold, preferably, one made of gypsum capable of absorbing moisture of slip may be used.

In the injection step of (2), the alginate solution of a concentration of 15% by weight may be applied to the inner wall of the casting mold. The application of the alginate solution serves to slow the absorption of moisture in the slip into the casting mold to prevent solidification of the previously injected slip during the injection of the slip, thereby enabling injection of a sufficiently uniform slip.

Injection of the slip in the injection step of (2) may be injected through a rubber funnel connected to the casting mold. The injection of slip using the rubber funnel as described above serves to reduce slip contact with air during injection of the slip, thus suppressing the formation of pores in the resulting tile.

In the forming step of (3), the casting mold in which the injection step is completed is allowed to stand for 5 to 20 minutes until all of the two layers are filled so that moisture is absorbed, so that solid content in slip is deposited on the inner wall of the casting mold. Consists of forming a layer. When the leaving time in the forming step is performed in less than 5 minutes, the slip layer is not sufficiently solidified, so that the obtained double layer is easily deformed, the interior of the cast body is not completely filled, and empty space is left, resulting in a decrease in strength. There may be a problem occurring, on the contrary, if it exceeds 20 minutes, there may be a problem that the productivity is lowered without affecting the casting substrate. The leaving time is required to the time that the entire inner layer is filled, it can be understood by those skilled in the art that can vary in the thickness of the layer, the present invention is not limited by the leaving time.

In the separating step (4), the separated layer formed by depositing on the inner wall of the casting mold is separated from the casting mold to undergo a subsequent firing process.

After the separation step (4), the obtained molding may be further carried out a drying step of drying for 20 to 30 hours in the shade. If the drying time is too short and sudden drying occurs, there may be a problem causing bending or cracking, it is preferable to dry slowly in the shade, too slow drying may also have a problem of lowering the productivity.

The primary firing step of (5) consists of first firing the separation layer separated in the separation step for 30 to 90 minutes at a temperature range of 850 to 950 ° C on a separation plate. Tiles that are first baked by performing the primary firing have a hardness enough to perform the application of glaze or transfer of photographs, and can be completely baked by subsequent secondary firing to produce tiles. The conditions such as the temperature and time of the primary firing are the same as or similar to the firing in the manufacture of general porcelain, and can be easily understood by those skilled in the art. As the separation plate to which the primary firing is performed, a separation plate of silicon carbide (SiC) material having excellent smoothness may be preferably used.

After performing the first firing step (5), the water-repellent coating step of applying a water repellent to the fired product before the application of glaze; may be further performed. The application of the water repellent has an effect of suppressing the generation of pores in the tile by the water repellent even when applying the glaze only to one surface of the tile. The water repellent is known enough to be used to buy and use commercially provided by the leading manufacturers at home and abroad, for example, the product name of the United States Duncan (DUNCAN) S 547 (SI 547) may be used, The present invention is not limited thereto.

After performing the first firing step (5), the transfer step of attaching a conventional transfer paper printed pictures or drawings, and heat treatment for 30 to 90 minutes at a temperature range of 800 to 900 ℃; can be further performed. This transfer step can in particular increase the utilization of the obtained magnetic tile as a cornerstone, and enables the production of decorative tiles and the like other than the cornerstone. The transfer paper and the transfer method by the transfer paper in the above-described transfer step is known to those skilled in the art can be easily purchased and can be easily understood.

In addition, the secondary firing step of (6) consists of applying a glaze to the primary fired fired product, and secondary firing for 30 to 90 minutes in the temperature range of 1200 to 1300 ℃. Glaze and the like applied and used glaze in the above it can be understood that those skilled in the art of pottery manufacturing can be easily purchased commercially or to use (self-made). If the firing temperature in the secondary firing is less than 1200 ℃ or less than 30 minutes heat treatment, there is a problem that the strength is reduced due to insufficient sintering, and not sufficiently formed into tiles, on the contrary, the firing temperature is 1300 ℃ If it exceeds or exceeds 90 minutes, there may be a problem that the part is softened to change the shape.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described.

The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Experimental Example  One

Viscosity change of the slip according to the addition amount of the peptizing agent was first performed based on the base.

First, it is necessary to reduce the viscosity of the slip and improve the flowability so that slip is injected into the gypsum mold with a narrow gap and the slip flows well to the inside. Therefore, the viscosity of the slip is promoted by promoting dispersion of solid content in the slip. The change of the slip was measured while adjusting the amount of the additive) to decrease as shown in Table 1 below, and the results are also shown in Table 1 below. The moisture content of the used body was fixed to 32%, and then 60% of sodium silicate sol was used as a peptizing agent.

Addition amount of peptizer (parts by weight / 100 parts by weight) Viscosity No addition - 0.05 4.9 0.10 1.9 0.15 1.8 0.20 1.7 0.25 1.8 0.30 1.9 0.35 2.0 0.40 2.3 0.45 2.4

As shown in Table 1, it was confirmed that the addition of 0.20 parts by weight of the peptizing agent shows the lowest viscosity value.

Experimental Example  2

In order to manufacture a thinner magnetic tile (thickness of about 1 mm), it is necessary to further reduce the specific gravity of the slip. For this purpose, it was tested to control the specific gravity of the slip by adding more water.

The change in specific gravity of the slip according to the addition of water is shown in Table 2 below.

At this time, the slip was used to further add 0.5 parts by weight of glycerin to the slip of Experimental Example 1.

Moisture (parts by weight) importance 30 1.80 31 1.73 32 1.69 33 1.62 34 1.55 35 1.48 36 1.41

As shown in Table 2, when it is necessary to reduce the specific gravity of the slip in order to form a thinner magnetic tile, it was confirmed that the specific gravity can be reduced by adjusting the water content.

In addition, as a result of applying to the molding experiment in the casting molding using the slip, it was possible to mold at 32 parts by weight of water when producing 2 mm thick tiles, but 34 parts by weight when producing 1 mm thick tiles. It could be confirmed that the smooth molding is made. At a lower specific gravity, there was no problem in molding, but it was confirmed that no easy molding was made compared to 34 parts by weight. In the case of 30 parts by weight of water, the slip amount used for general slip casting is not a smooth injection of slip into the mold under these conditions, and after drying, it was confirmed that the surface of the substrate was not smooth.

Example  One

Based on the results of the above experimental examples, a magnetic tile having a thickness of 2 mm was manufactured according to the present invention. The slip used was 32 parts by weight of water and 5 parts by weight of feldspar based on 100 parts by weight of quartz, including 15 parts by weight of silica, 20 parts by weight of pottery stone, 15 parts by weight of clay, 20 parts by weight of clay, and 30 parts by weight of feldspar. 0.2 parts by weight of sodium silicate sol at a concentration of 60% by weight, 0.5 parts by weight of glycerin, and 0.2 parts by weight of polyvinyl alcohol at a concentration of 5% by weight, and after the preparation of the slip, 10 ^-2 torr After degassing by applying a vacuum, and after degassing, it was injected into a gypsum mold coated with an alginate solution on the inner wall using a rubber funnel, and allowed to stand for 20 minutes. After drying, the substrate was first baked by heating at a temperature of 900 ° C. for 60 minutes on a silicon carbide (SiC) separation plate, and a glaze was applied to the first baked material, and then baked at a temperature of 1250 ° C. for 60 minutes. Self according to the invention The one was obtained.

Example  2

A magnetic tile having a thickness of 1 mm was prepared in the same manner as in Example 1 except that 34 parts by weight of water was used.

The physical properties of the magnetic tiles obtained in Examples 1 and 2 were examined. As a result of the inspection, in the number of pinholes in the tiles (pieces / inch), no pinholes occurred.

In terms of strength, as measured by the three-point bending strength, it showed a value of 130 to 140MPa, which can be seen to represent a sufficient strength does not matter at all when the tile construction.

As to the degree of warpage, the degree of warpage of the substrate depends on the surface state of the separation plate used in firing, and in the case of the present invention, a silicon carbide separation plate having excellent smoothness indicating ± 10 mils (1/1000 inch) is used. It was confirmed that the degree of warpage was also maintained at ± 10mil.

In addition, the surface roughness of the obtained product showed that the surface of the glaze is applied, the value of 20㎛ ± 5㎛ or less, the surface without the glaze was confirmed that the surface roughness of 80㎛ ± 5㎛.

As a result of synthesizing the above embodiments, it was confirmed that the magnetic tiles can be manufactured while being sufficiently thin with a thickness of about 1 to 2 mm.

Therefore, according to the present invention, there is an effect of providing a method for producing a magnetic tile having a high strength and a magnetic tile obtained therefrom so as to be suitable for use as a peritoneum and the like in the ossuary.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (11)

delete delete (1) 0.1 to 100 parts by weight of a base material comprising 10 to 20 parts by weight of silica, 15 to 25 parts by weight, 10 to 20 parts by weight of clay, 15 to 25 parts by weight of clay, and 20 to 40 parts by weight of feldspar. A slip preparation step of preparing a slip for preparing a tile by mixing 0.45 parts by weight of a peptizing agent, 0.2 to 1.0 part by weight of glycerin and 32 to 34 parts by weight of water; (2) an injection step of injecting the slip obtained in the slip preparation step into a casting mold manufactured in the shape of a tile to be manufactured; (3) Molding in which the casting mold having completed the injection step is allowed to absorb moisture by leaving the casting mold for 5 to 20 minutes until all of the lamination layers are filled so that solid content in the slip is deposited on the inner wall of the casting mold to form a lamination layer. step; (4) a separation step of separating the separation layer from the mold for casting; (5) a primary firing step of first firing the separation layer separated in the separation step for 30 to 90 minutes at a temperature range of 850 to 950 ° C. on the separation plate; And (6) a secondary firing step of applying glaze to the first fired calcined product, and second firing for 30 to 90 minutes in the temperature range of 1200 to 1300 ℃; Method of manufacturing a magnetic tile, characterized in that consisting of. (1) 0.1 to 100 parts by weight of a base material comprising 10 to 20 parts by weight of silica, 15 to 25 parts by weight, 10 to 20 parts by weight of clay, 15 to 25 parts by weight of clay, and 20 to 40 parts by weight of feldspar. A slip preparation step of preparing a slip for preparing a tile by mixing 0.45 parts by weight of a peptizing agent , a polyvinyl alcohol solution having a concentration of 0.1 to 0.3 parts by weight, and 32 to 34 parts by weight of water; (2) an injection step of injecting the slip obtained in the slip preparation step into a casting mold manufactured in the shape of a tile to be manufactured; (3) Molding in which the casting mold having completed the injection step is allowed to absorb moisture by leaving the casting mold for 5 to 20 minutes until all of the lamination layers are filled so that solid content in the slip is deposited on the inner wall of the casting mold to form a lamination layer. step; (4) a separation step of separating the separation layer from the mold for casting; (5) a primary firing step of first firing the separation layer separated in the separation step for 30 to 90 minutes at a temperature range of 850 to 950 ° C. on the separation plate; And (6) a secondary firing step of applying glaze to the first fired calcined product, and second firing for 30 to 90 minutes in the temperature range of 1200 to 1300 ℃; Method of manufacturing a magnetic tile, characterized in that consisting of. The method according to claim 3 or 4, Defoaming step of applying a vacuum to the slips; The method of claim 5, Wherein said defoaming step is performed by applying a vacuum of 10 ⁻¹ to 10 ⁻³ torr for 5 to 15 minutes per 10 liters of the slip. The method according to claim 3 or 4, Method of producing a magnetic tile, characterized in that the alginate solution of a concentration of 15% by weight is applied to the inner wall of the casting mold in the injection step (2). delete delete delete delete