KR101833265B1 - Method of color patterning on fine ceramic substrate - Google Patents

Abstract

[0001] The present invention relates to a method of coloring a fine ceramic substrate, and more particularly, to a method of coloring a fine ceramic green sheet by color; A step of stacking color green sheets of the same color or different colors on the first background green sheet by using one selected green sheet as a first background green sheet, ; Stacking a second base green sheet on at least the color green sheet to produce a combination green sheet; And firing the combined green sheet, wherein the second base green sheet is laminated to a thickness such that the color of the green sheet can be projected after firing. ≪ / RTI >
Industrial Applicability According to the present invention, it is expected that various effects such as various colors, patterns and the like can be imparted to fine ceramics without using glaze.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of coloring on a fine ceramic substrate,

[0001] The present invention relates to a method of coloring a fine ceramic substrate, and more particularly, to a method of coloring a fine ceramic green sheet by color; A step of stacking color green sheets of the same color or different colors on the first background green sheet by using one selected green sheet as a first background green sheet, ; Stacking a second base green sheet on at least the color green sheet to produce a combination green sheet; And firing the combined green sheet, wherein the second base green sheet is laminated to a thickness such that the color of the green sheet can be projected after firing. ≪ / RTI >

Ceramic products, such as ceramics, are permanently colored, thereby enhancing the beauty of ceramic products. Such a conventional color imparting method is a method of embossing inlay material (pigment, stone, shell, bone, horn, etc.) on the surface of a ceramic material and embedding pattern, color, etc., a method of using ceramic ink , And methods of using glaze.

In ceramics, generally, a method of using a glaze as a method of imparting color is mainly used. This is because, after the ceramics to be imparted with color are first formed and then subjected to a first firing (preliminary firing, a firing temperature is about 700 to 800 ° C.), a desired picture is drawn on the surface using a glaze and then a second firing And the temperature is about 1200 to 1300 DEG C) to complete the ceramics having the desired color.

Here, during the secondary firing process, the glass component contained in the glaze melts and is firmly bonded to the glass of the main body, and the pigment contained in the glaze exhibits a color, and the surface is smooth and has a beautifully colored picture .

Fine ceramics, however, have a much higher firing temperature than ceramics (1450 ~ 1650 ℃), making it difficult to apply colors in ceramics. It is very difficult to find practical applications of real ceramics with various colors. However, it is possible to apply various colors to fine ceramics using glazes by combining the conventional techniques and modifying the heat treatment sequence to some extent.

Briefly, first, finely ceramics are sintered densely at a specific firing temperature, then a desired figure is formed on the surface using a glaze, and then reheated to a temperature at which the glaze is strongly adhered. Of course, this annealing temperature should be considerably lower than the self-baking temperature of fine ceramics.

However, when the color is imparted to the surface of the fine ceramics by using the glaze, the following disadvantages are derived.

1. In terms of texture, fine ceramics with such a color is hardly distinguished from ceramics. Particularly, it is difficult to distinguish it from ceramics in appearance, and only the weak point of the fine ceramics, which is much higher in price, is highlighted.

2. Surface machining is impossible. Since the picture only forms a thin layer on the surface, the picture may be erased by grinding the surface after drawing the picture.

3. The vitrified glaze layer is very low in mechanical strength, abrasion resistance and chemical resistance compared to fine ceramics, which is the base material, and can damage the picture in harsh environments. For example, when a glaze layer is formed on the surface of an accessory such as a wristwatch, which is a fine ceramics, and a color is imparted to the glaze layer, it may be vulnerable to wear and the like occurring in daily life. In other words, even if the base material is not damaged, the surface glaze layer containing the picture is liable to be damaged.

4. The vitrified glaze layer restricts the expression of color due to its glass layer. Because of the presence of the glass layer, the glaze painting gives a translucent feel, which is completely different from the color of the fine ceramics.

On the other hand, Fine Ceramics has very high mechanical strength, abrasion resistance, chemical resistance and excellent electromagnetic characteristics compared with ceramics, and it is widely used as essential parts and materials of semiconductor industry, display industry, mobile communication device, automotive sensor, do. Although fine ceramics have superior physical and chemical properties compared to ceramics, there are few cases where they are applied to real life, not industry. In order to apply it to real life, it is necessary to design to be able to feel attractive. However, it is one of the reasons that utilization method in life is very low because the method of giving a complicated pattern color to fine ceramics so far is very limited.

Therefore, even if a glaze layer is not applied to fine ceramics, it is necessary to search for a new method capable of imparting sufficient color.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide color, pattern and the like to fine ceramics without using a glaze.

Another object of the present invention is to minimize the phenomenon in which the pigment inside the color layer spreads to the periphery by firing in the state that layers near colorless are covered on the color layer.

It is another object of the present invention to improve the sharpness of a picture by minimizing the phenomenon that the pigment inside the color layer of the fine ceramics is spread to the surroundings.

Another object of the present invention is to provide a very unique color feeling because a color is provided through a ceramic layer which is close to a colorless color, so that a diversification of a product using fine ceramics can be sought.

According to an aspect of the present invention, there is provided a method of manufacturing a thin ceramic green sheet, A step of stacking color green sheets of the same color or different colors on the first background green sheet by using one selected green sheet as a first background green sheet, ; Stacking a second base green sheet on at least the color green sheet to produce a combination green sheet; And firing the combined green sheet, wherein the second base green sheet is laminated to a thickness such that the color of the green sheet can be projected after firing. ≪ / RTI >

The present invention also provides a method of manufacturing a fine green ceramic green sheet, Applying a color paste of the same color or different color on the first background green sheet as a first background green sheet, using the green sheet of the selected color among the green sheets as a first background green sheet; Applying at least a ground color paste on the color paste or laminating a second base green sheet of a selected color of the green sheet; And firing a green sheet on which a paste is applied or on which a second base green sheet is laminated, wherein the base green paste or the second base green sheet is coated to a thickness such that the color of the color paste can be projected after firing Or laminated on the surface of the ceramic substrate.

The present invention also provides a method of manufacturing a fine green ceramic green sheet, A green sheet of a selected color among the green sheets is used as a first background green sheet and a green sheet of a selected color among the green sheets is stacked as a second background green sheet on the first background green sheet, Drilling the green sheet along the desired shape to form a perforation; Injecting a color paste into the perforations; Applying a ground color paste on the color paste; And a step of firing the green sheet coated with the ground color paste, wherein the green paste is applied to a thickness such that the color of the color paste can be projected after firing the ground color paste. .

It is preferable that the green sheets and the pastes are the same material or a material whose difference in firing temperature does not exceed 100 캜 in the case of different materials.

Preferably, the background green sheets, the background green sheets and the color green sheets, or the background green sheets and the color pastes are made of at least one different color.

The paste is preferably applied to a base green sheet using a screen printing or dispensing apparatus.

The present invention also relates to a method of manufacturing a thin ceramic article, Forming an engraved groove on the surface of the ceramic article; Injecting a color paste into the grooves of the engraved surface; And firing the ceramics article into which the color paste is injected. The present invention also provides a method of implementing color on a fine ceramic substrate.

The present invention also relates to a method of manufacturing a thin ceramic article, Forming an engraved groove on the surface of the ceramic article; Injecting a color paste into the grooves of the engraved surface; Drying the color paste and applying a ground color paste thereon; And firing a ceramic material coated with the ground color paste. The present invention also provides a method for implementing color on a fine ceramic substrate.

The present invention also relates to a method of manufacturing a fine green ceramic green sheet, Drilling the green sheet; Laminating the perforated green sheets; Laminating a top green sheet of the perforated green sheets or a green sheet not perforated in the bottom green sheet; Injecting a color paste into the perforated green sheet; And firing the laminated green sheet into which the color paste is injected, wherein the perforated green sheets are perforated in the same shape as each other.

It is preferable that the ceramic article and the paste have the same material or different materials and the difference in firing temperature does not exceed 100 캜.

The ceramic article, the color paste and the ground color paste are preferably made of at least one different color.

Preferably, the paste is applied to the engraved groove using a screen printing or dispensing apparatus.

And grinding the fired second green color sheet or fired green paste layer after firing the ceramic material.

It is preferable that the engraved grooves are formed by pressure molding or injection molding using a metal mold having a positive angle.

Industrial Applicability According to the present invention, it is expected that various effects such as various colors, patterns and the like can be imparted to fine ceramics without using glaze.

In addition, it is possible to minimize the phenomenon that the pigment inside the color layer spreads to the periphery by firing in the state that layers near to colorless are covered on the color layer of fine ceramics, thereby improving the sharpness of color imparted to the fine ceramics The effect is expected.

In addition, after the firing is completed, a colorless layer near the color layer is removed by grinding to obtain a clearer color and pattern.

In addition, since the color is provided through the ceramic layer which is close to the colorless, a very unusual color tone can be obtained, and thus, an action effect for finding diversification of the product using the fine ceramics is expected.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a method of implementing colors on a fine ceramic substrate according to a first embodiment of the present invention; FIG.
FIG. 2 is a process diagram showing a method of implementing colors on a fine ceramic substrate according to a second embodiment of the present invention.
3 is a process diagram showing a method of implementing colors on a fine ceramic substrate according to a third embodiment of the present invention.
4 is a process diagram showing a method of implementing colors on a fine ceramic substrate according to a fourth embodiment of the present invention.
5 is a process diagram illustrating a method of implementing colors on a fine ceramic substrate according to a fifth embodiment of the present invention.

Hereinafter, the present invention will be described in more detail based on preferred embodiments.

The present invention is based on the following method.

First, the parts that represent different colors from the base material are basically composed of components almost similar to the base material. Except in exceptional cases, a method of adding pigments that express different colors to almost the same components as the parent material is used.

Secondly, the raw material showing different colors, that is, the powder mixed with the appropriate amount of pigment in the base material, is used in a slurry or paste method having an appropriate viscosity. Particularly, the slurry and the paste are preferably organic solvents such as alcohols, toluene, terpineol and the like. In addition, proper amount of organic binder and plasticizer is added to the slurry and paste to improve the adhesion and to prevent cracking during drying.

Third, the method of engraving a picture on a base material basically uses the engraving method. A desired picture is engraved on an appropriate fine ceramics formed body with an engraved engraving, and this engraved area is filled with a slurry or paste of appropriate color and dried.

Fourth, the molded body having the sketch described above is heat-treated under proper baking conditions and baked at once to obtain fine ceramics having a color. In other words, fine ceramics with very dense and bright colors can be obtained by adjusting the shrinkage behavior of the base material and other parts having different colors.

The method of imparting color in the present invention is not limited to a form such as a picture or a letter.

Here, it is preferable that the green sheet, the ceramic material, the paste, and the like have a similar shrinkage behavior upon firing, so that the reliability of the final product can be established, and therefore, it is preferable to constitute the materials having similar firing temperatures. Particularly, it is preferable to select a material which does not differ in firing temperature by 100 ° C or more.

In addition, the materials of the base material and the color parts do not exclude the same color.

The present invention has the following advantages over the color imparting method used in ceramics.

a. Typical fine ceramics such as alumina ceramics and zirconia ceramics exhibit superior mechanical strength and abrasion resistance compared to ceramics. In general, the mechanical strength of magnetic ceramics is about 200 MPa, while the strength of alumina ceramics is about 400 MPa and that of zirconia ceramics is about 1000 MPa. In addition, they exhibit excellent abrasion resistance to be used in tools for processing metals, so that when they are given a color, they can be expected to have a semi-permanent life and can be used even in harsh environments.

b. In the case of using the engraving, the color imparting area may have a considerable depth. By utilizing this point, surface machining becomes possible. In other words, the surface of the plastic body on which the picture is drawn is grinded and precision polished preserves the color, so that a glossy surface can be obtained. In particular, this luster is not a vitreous luster but has the advantage of inherent luster of the material itself. Alumina ceramics is the same optical material as sapphire, a natural gemstone, and zirconia ceramics is the mother of Cubic Zirconia (commonly known as cubic zirconia, commonly called Calcium-stabilized zirconia), also known as fake diamond. In other words, they can show a luxurious look close to jewelry.

c. Unlike ceramics, alumina ceramics and zirconia ceramics use refined raw materials, so strict quality control is possible. As it is well known, it is very difficult to maintain certain quality control of ceramics due to changes in color due to calcination atmosphere as well as changes in components coming from natural raw materials. On the other hand, alumina and zirconia ceramics used as parts and materials of high-tech industries are advantageous for mass production because of strict quality control.

<Examples>

Example  1. Fine ceramics Green sheet  How to use

This method is suitable for thin and flat thin plate ceramics.

First, slurry is prepared by mixing fine ceramics powder with organic solvent, organic binder and plasticizer, and prepared by green sheet using tape casting method. The thickness of the green sheet is in the range of approximately 0.05 to 0.5 mm, which is advantageous in that it is excellent in workability and can be bonded by heating the sheets.

Of course, this green sheet is not a kind. Green sheets of all necessary colors corresponding to background color and color figure should be prepared. In the embodiments described herein, the background color is limited to a color very close to white to simplify the discussion. However, the present invention is not limited to the white background color. The specific production process is as follows.

- Prepare white green sheets with the desired thickness. This can be called the first background green sheet.

- Cut the colored green sheets, including white on the white green sheet, according to the shape of the figure and attach them to the correct position. The green sheet to which the hue is imparted may be referred to as a color green sheet. If the thickness of the green sheet is thinner than the thickness of the desired color layer, a plurality of sheets may be stacked, or a color green sheet laminated to a desired thickness before cutting may be used.

- Once the desired picture layer is formed as described above, the white green sheets are laminated again on the desired thickness. The white green sheet may be referred to as a second green sheet.

- The stacked flat plates are vacuum-packed as described above, and simultaneously applying pressure and applying heat while integrating them.

- By firing the molded plate as described above, a fine ceramic sheet is obtained in which the color is projected through the white green sheet. Of course, the white green sheet may be formed to have a thickness enough to project the hue of the green sheets to which the hue is projected, thereby achieving the object of the present invention.

- Instead of projecting the color in the fired flat plate as described above, the upper colorless layer (the white green sheet portion) may be ground and removed to obtain a clearer picture.

Example  2. Fine ceramics paste ( paste How to use

The second embodiment is a method suitable for making a material thinner and smaller in size than the first embodiment. The first background green sheet and the second background green sheet are the same as those of the first embodiment.

Same as the method of making the slurry in Example 1, but a paste having a much higher viscosity than the slurry is produced. Here, the paste can be named as a color paste. Thereafter, the paste is printed on a flat support plate for coloring on fine ceramics using a screen. The layer thickness obtained at a time through screen printing is in the range of approximately several tens of microns, and printing -> drying -> reprinting can be repeated to produce a product having a thickness of several hundred microns or more. Here, instead of the printing method, a method of using a fixed-quantity discharger for discharging the paste as described later may be employed. The method of applying the paste in this way is not particularly limited.

When the paste is used for screen printing, a very detailed picture can be obtained. Let's assume that it consists of three colors, a ground color close to white and two colors.

- Repeat the printing of the background layer on the fine ceramics to the desired thickness -> drying -> reprinting.

- When reaching the position where two colors should be entered, first print and dry it in the shape of the figure using the paste containing the pigment of the corresponding color in the place where the one color enters.

- Then use the paste with the remaining color pigment to print and dry in the rest of the figure.

- Finally, print and dry with white paste on the part corresponding to the background color in this layer. Here, the white paste may be referred to as a ground color paste.

- Repeat the above procedure for each layer to form a color layer.

- When the color layer is completed, print the background layer over the desired thickness -> dry -> reprint.

- After firing, fix the color on fine ceramics.

- Instead of projecting the color in the fired flat plate as described above, the upper colorless layer (the part fired with the ground color paste) may be ground and removed to obtain a clearer picture.

Example  3. Example  Method of mixing 1 and 2

Mixing the methods of Examples 1 and 2 appropriately may be more efficient. In other words, it becomes possible to produce a fine ceramics article having a very large thickness, a very fine picture, and engraved letters.

This is to replace the ground color layer formed below and in the second embodiment with the same green sheet as in the first embodiment. That is, a green sheet having a thickness corresponding to the background color layer at the bottom of the figure is first laminated, then screen printing is performed thereon to complete the color picture layer, and then the green sheet is covered with the thickness of the upper color layer.

Example  4. Example  1 variant method

In this embodiment, a paste is used as in the second embodiment, but the first embodiment is combined with the first embodiment while using a fixed quantity discharger instead of screen printing.

More specifically, except for the color imparting layer, green sheets are laminated in the same manner as in Example 1. [

- First, penetrate the area where the color enters the ground color green sheet. Here, the ground color green sheet may be referred to as a first ground green sheet.

- After the processed ground green sheet is put on the green sheet which forms the background color, the paste containing the color pigment is put into the empty space formed by using the quantitative ejector. The above-described metered dose dispenser can be replaced by other means capable of fixed dispensing, or it can be done manually.

- After drying the discharged color paste, cover the green sheet by the thickness of the upper ground color layer. The green sheet may be referred to as a second background green sheet.

The fourth embodiment is the complementary method of the first embodiment. In the first embodiment, "a process of cutting a portion corresponding to the color imparting layer and bonding it to a part of the ground color sheet is modified" and more easily changed.

Example  5. For fine ceramics in the form of thick flat plates instead of thin plates

In the case of a thick plate-type object, the part corresponding to the figure must first be engraved on the formed body.

The method of forming the engraved grooves may be a manual or machining method, a embossed mold, or an injection molding method. A method using a mold or an injection molding is suitable for mass production, but there is a cost problem and it is necessary to find a trade-off point.

The depth of the engraved groove should be adjusted as needed. If grinding and polishing the surface after firing, the thickness of the sacrificial layer should be taken into consideration to form the depressed grooves. It is also possible to adjust the color and overall feel of the picture by adjusting the depth of the concave groove and the thickness of the color paste (or slurry) entering it.

The process after forming the depressed grooves is as follows.

- First, paste the paste of the color corresponding to the concave groove of the fine ceramics formed body to a desired thickness and then dry it.

- Apply a ground color paste (colorless or close to white) on this color layer to an appropriate thickness to completely cover the color layer.

- The fine ceramics shaped body thus produced is dried and then fired.

In this way, the color projected outside the background color of the thin ceramic plate with a thick plate shape can be obtained.

- It is also possible to use a method in which a colorless layer on the top (fired part of the ground color paste) is ground and removed to obtain a clearer picture instead of projecting a color on a fired flat plate as described above.

Here, it is also possible to obtain a ceramic article in which the color is engraved by omitting the process of applying the ground color paste (colorless or near white).

Example  6. Ceramic Green Sheet  When drilling and injecting a color paste in the perforated area

However, in this case, a method of forming a space for injecting a color paste by laminating a green sheet of a perforated shape with a predetermined pattern is also possible.

- First, make several green sheets. The production method of the green sheet is as described above.

- Any one of the green sheets thus manufactured is perforated with a predetermined pattern. The other green sheets are also perforated with the same pattern as the green sheet on which the perforated green sheet is machined.

- The green sheets thus perforated with the same pattern are laminated in such a manner that the perforated portions coincide with each other, and green sheets which are not perforated at the top or bottom of the laminated green sheets are laminated to complete the production of the green sheet laminate.

Then, a color or picture area is completed by injecting a color paste into the perforation.

- Fill the green sheet laminate into which the color paste is injected.

Example  7. For three-dimensional fine ceramics

There are many ways to make a three-dimensional shaped fine ceramics shaped body, but the listing of these methods here is not consistent with the object of the present invention and will be omitted.

Among these methods, three-dimensional fine ceramics are considered as examples of injection molding which is excellent in mass productivity. However, the scope of the present invention is not limited to injection molding.

Fine ceramics injection molding is basically the same as injection molding of polymer resin. The difference is that it contains a large amount of fine ceramics powder in the resin. In other words, the injection-moldable resin and the fine ceramics powder are mixed well, and then the mixture is pushed into an injection mold to be hardened, followed by demolding to obtain a molded body.

This method is capable of manufacturing a highly complex three-dimensional shaped molded body with precise dimensions, and also has an advantage of excellent processability.

The method of inserting the engraved angles into the thus obtained three-dimensional shaped fine ceramics formed body and the method of drawing the pictures thereafter are almost the same as those of the fifth embodiment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (14)

delete delete delete delete delete delete delete Producing a fine ceramic material in a bulk form;
Forming an engraved groove on the surface of the ceramic article;
Injecting a color paste into the grooves of the engraved surface;
Drying the color paste and applying a ground color paste thereon; And
Firing the ceramic material coated with the ground color paste;
&Lt; / RTI &gt; further comprising the steps of: delete 9. The method of claim 8,
Wherein the ceramic material and the paste are the same material as each other or a substance whose firing temperature difference does not exceed 100 캜 in the case of a different material. 9. The method of claim 8,
Wherein the ceramic article, the color paste and the ground color paste are composed of at least one different color. 9. The method of claim 8,
Wherein the paste is applied to an engraved groove using a screen printing or dispensing apparatus. 9. The method of claim 8,
Grinding the fired second green color sheet or fired green paste layer after firing the ceramic material;
&Lt; / RTI &gt; further comprising the steps of: 9. The method of claim 8,
Wherein the engraved grooves are formed by press molding or injection molding using a metal mold with a positive angle.

Images