JP3554890B2 - How to decorate ceramics with precious metals - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention applies a liquid paint obtained by mixing a powdery noble metal and a frit for ceramics to the surface of the ceramics and sinters the same, thereby aggregating the powdery noble metal to form precious metal spheres having different sizes. The present invention relates to a method of decorating a large number of porcelains on a surface of ceramics.
[0002]
[Prior art]
Conventionally, when decorating the surface of a ceramic using a noble metal such as gold, silver, or platinum, a paint is prepared by mixing a powdered noble metal powder with a frit for the ceramic, and then applied to the surface of the ceramic. After that, the method of firing at 700 to 800 ° C. and decorating the so-called gold and silver colors is generally used. In this case, the noble metal such as gold or silver is present in the glassy layer of the frit in a powdery state.
[0003]
[Problems to be solved by the invention]
However, in the decoration method using gold or silver, the thickness of the obtained decorative pattern is flat, and the metal powder is only enclosed in the vitreous layer of the frit. It was simple, had little change and was not accompanied by luxury.
[0004]
[Means for Solving the Problems]
The present invention has been improved and eliminated in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a new decorating method for decorating a large number of noble metal balls having different sizes on the surface of ceramics to decorate them. It is.
[0005]
In order to solve the above-mentioned problem, the invention according to claim 1 employs a method in which 85 to 95% of a powdery noble metal is mixed with 5 to 15% of a frit for ceramics, and water and A liquid paint to which a glue is added is prepared as necessary, and the paint is applied to a surface of a ceramic which has been baked in advance to a thickness of 0.1 mm or more, and the whole is at a temperature not lower than the melting point of the noble metal and By firing within a temperature range equal to or lower than the melting point of the glaze used for the porcelain, the powdery noble metal is melted and agglomerated to form a large number of noble metal spheres having different sizes, and the majority of each noble metal sphere is externally formed. This is a method of decorating ceramics with a noble metal, characterized in that a part of each noble metal sphere is exposed to the surface of the ceramic via a frit.
The powdery noble metal is melted by baking, aggregates and grows into noble metal spheres having different sizes. The size of the noble metal sphere varies depending on the applied thickness of the liquid paint. In a thick portion, a large noble metal sphere is generated, and the distribution density of the noble metal sphere becomes coarse. In addition, small noble metal spheres are generated in portions where the thickness of the liquid paint applied is small, and the distribution density of the noble metal spheres is negligible. Therefore, the size and distribution density of the noble metal spheres can be arbitrarily set to some extent by changing the applied thickness of the liquid paint. Most of these precious metal spheres are exposed to the outside and have a decorative function, and are partially firmly attached to the ceramic surface in a state of being buried in the frit. As described above, in the present invention, a decorative pattern in which a large number of precious metal balls having different sizes are scattered on the surface of the ceramic, that is, a novel decoration that has never been seen before, in which jewels having different sizes are scattered on the surface of the ceramic. It is possible to obtain a pattern.
[0006]
The means of claim 2 adopted by the present invention is that the ceramic is inclined at the time of firing, so that the noble metal spheres being generated on the surface of the ceramic flow by their own weight, and a flow pattern is formed by the trace of the flow. Item 4. A method for decorating ceramics with the noble metal according to Item 1.
By inclining the ceramic which is producing the noble metal sphere, a part of the noble metal sphere flows out by its own weight. Therefore, the trace is formed, and the trace itself also becomes a flowing pattern.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the configuration of the present invention will be described based on an embodiment of the invention shown in the drawings. FIG. 1 relates to an embodiment of the present invention, in which FIG. 1A is a longitudinal sectional view showing a state in which a liquid paint 2 is applied to the surface of a previously fired ceramic 1 and FIG. FIG. 4C is a longitudinal sectional view of the ceramic 1 in the middle, showing a state after firing. As shown in the figure, in this embodiment, first, a liquid paint 2 is prepared. The liquid paint 2 is prepared by preparing 85 to 95% of a powdery noble metal 3 composed of an alloy of gold, silver, and copper alone or a combination of gold, silver, and copper, and an alloy of these and platinum or palladium. Prepare 5-15% frit 4 and mix. The reason that platinum and palladium are not used alone is that these noble metals have a high melting point and, as described later, at a temperature higher than the melting point of the noble metal employed and within the melting point of the glaze used for ceramics. This is because the desired noble metal sphere is not easily generated in the firing.
[0008]
The reason why the mixing ratio of the precious metal 3 and the frit 4 is in the range of 85 to 95% for the precious metal 3 and 5 to 15% for the frit 4 is that when the frit 4 is less than 5%, the amount of the frit 4 is reduced. This is because the strength of adhering the noble metal spheres 5 generated on the ceramic surface to the ceramic surface decreases. On the other hand, when the frit 4 exceeds 15%, the ratio of the noble metal becomes small, the growth due to the aggregation of the powdery noble metals during firing described later becomes inactive, and large noble metal spheres 5 cannot be obtained. Are also sparse, and a decorative effect as if scattered with a target jewel cannot be obtained. The mixing ratio of the two is preferably 85 to 90% for the noble metal 3 and 10 to 15% for the frit 4.
[0009]
After the noble metal 3 and the frit 4 are mixed in this way, a liquid paint 2 is obtained by adding water and, if necessary, a sizing agent such as a fly to the mixed material. A glue such as a paste functions as a binder for these mixed materials, and also to make the liquid paint 2 easily adhere to the surface of the ceramic 1.
[0010]
After the liquid paint 2 is mixed and adjusted, the liquid paint 2 is applied by brushing or spraying on the surface of the ceramic 1 which has been baked in advance and painted. The coating thickness is not less than 0.1 mm. Preferably, it may be in the range of 0.5 to 1.5 mm. This coating thickness affects the size and distribution density of the noble metal spheres 5 generated at the time of baking, which will be described later, so that the precious metal spheres 5 having the desired size and distribution density are obtained. The application may be performed by adjusting the application thickness and the application pattern. Of course, when the application thickness is changed partially or for each pattern, the combination of the size and distribution density of the noble metal spheres 5 and the arrangement pattern thereof can be adjusted arbitrarily, and the variation of the decorative function increases. There is also an effect.
[0011]
The reason why the coating thickness of the liquid paint 2 is limited to 0.1 mm or more is that when the thickness is less than 0.1 mm, noble metal powder is less agglomerated, no precious metal spheres 5 having a desired size are generated, and This is because the small noble metal spheres 5 are densely distributed, and the visual effect that the noble metal spheres 5 in the form of water droplets having different sizes are decorated on the surface of the porcelain when viewed is not obtained. However, when the applied thickness of the liquid paint exceeds about 5.0 mm, the noble metal spheres 5 become excessively large and the distribution density of the noble metal spheres 5 becomes coarse. The visual recognition effect that the jewels having different sizes are dispersed and decorated with a large number of noble metal balls 5 cannot be obtained. Therefore, the coating thickness of the liquid paint 2 may be in the range of 0.1 to 5.0 mm, preferably in the range of 0.5 to 1.5 mm. Within the range of 0.5 to 1.5 mm, it is possible to generate many large and small noble metal spheres 5 having a diameter of 2 mm or less.
[0012]
After the liquid paint 2 is applied to the surface of the ceramic 1 in an arbitrary coating thickness and an application pattern in this manner, the temperature is higher than the melting point of the noble metal employing the same and lower than the melting point of the glaze used for the ceramic. The firing may be performed for about 10 hours within the range. The firing temperature was set to a temperature equal to or higher than the melting point of the adopted noble metal because the noble metal contained in the liquid paint was fired at a temperature equal to or higher than the melting point. This is because the noble metal spheres 5 are generated on the surface of No. 1 and firing at a temperature equal to or higher than the melting point of the noble metal employed is an essential condition. Also, the firing temperature was set to a temperature lower than the melting point of the glaze used for the ceramic 1 because firing at a temperature higher than the melting point of the glaze of the ceramic 1 caused the noble metal spheres 5 to be buried in the glaze of the ceramic 1. This is because the decoration effect of the noble metal ball 5 is less likely to appear on the surface of the ceramics 1, and the decoration effect is reduced.
[0013]
Thus, the specific firing temperature is such that silver has a melting point of 961.93 ° C., gold has a melting point of 1064.4 ° C., and copper has a melting point of 1083.4 ° C., so that these are used alone. In the case, it is necessary to fire at a temperature higher than the melting point of each of these noble metals, and in the case of an alloy by a combination of these two or three, at a temperature higher than the melting point of the alloy determined by their proportion. What is necessary is just to bake. Similarly, since the melting point of palladium is 1550 ° C. and the melting point of platinum is 1770 ° C., an alloy of a single or all of these noble metals and a single or combination of silver, gold and copper is also used. The firing may be performed at a temperature equal to or higher than the melting point of the alloy determined by the ratio.
[0014]
Further, the melting point of the glaze used for the ceramic 1 is low-temperature glaze or low-fire glaze from SK010a (900 ° C) to SK2a (1120 ° C), medium-temperature glaze from SK3a (1140 ° C) to SK10 (1300 ° C) or medium. Like a high-temperature glaze, a high-temperature glaze from SK11 (1300 ° C.) to SK20 (1530 ° C.) or a high-fire glaze, the temperature varies depending on the type of glaze, and the firing temperature may be lower than the melting point of the glaze used. Usually, as the glaze for the ceramic 1, a glaze having a melting point of about 1150 ° C. is generally used. Therefore, the preferable firing temperature is in the range of 961.93 ° C., which is the melting point of silver, to about 1150 ° C., which is the melting point of the glaze generally used for the ceramics 1.
[0015]
The liquid paint 2 applied to the surface of the porcelain 1 by baking within the above set temperature range first begins to melt the frit 4 at a low temperature of about 800 ° C. You will be able to move freely. Then, the noble metal 3 begins to melt and becomes spherical in time, moves in the frit 4 in that state, adheres to each other during the movement, and aggregates to grow into a sphere. The agglutination reaction of the noble metal 3 varies depending on the applied thickness of the liquid paint 2, and in a portion where the applied thickness is large, a large amount of the noble metal 3 exists within a certain range in which the molten noble metal 3 can move. Many noble metals 3 aggregate into one noble metal sphere 5, and a large one of about 2.0 mm is generated. In addition, the distribution density of the noble metal spheres 5 becomes coarse because nearby noble metal 3 agglomerates.
[0016]
On the other hand, in a portion where the coating thickness of the liquid paint 2 is thin, the amount of the noble metal 3 within a certain range is small, and the movement of the molten noble metal 3 is limited because the amount of the frit 4 is small. The reaction is hardly performed, and a small noble metal sphere 5 of about 0.05 mm is generated. And the distribution density of the noble metal spheres 5 becomes honey. As described above, by changing the application thickness and application pattern of the liquid paint 2, the size and distribution density of the noble metal spheres 5 and the arrangement pattern thereof can be arbitrarily set to some extent. A novel decorative pattern, such as studded large and small jewels, formed by arranging water droplet-shaped noble metal spheres 5 having different diameters in the range of about 0.05 to 2.0 mm in an arbitrary distribution density and distribution pattern. can get. Most of these precious metal spheres 5 are exposed to the outside and have a decorative function, and are firmly attached to the surface of the ceramic 1 while partly buried in the frit 4.
[0017]
By the way, the present invention is not limited to the above-described embodiment. For example, it is also possible to add a pigment to a liquid paint and add a color to the ceramic surface. Further, it is only necessary to apply the liquid paint 2 to the surface of the ceramic 1 and bake it, and the process itself is not different from ordinary painting or the like, and it is possible to decorate easily. After the noble metal spheres 5 are generated and decorated in the above-described manner, the entire surface of the noble metal spheres 5 can be burned with a transparent top glaze to protect the noble metal spheres 5.
[0018]
Also, when the ceramic 1 is inclined during firing, the noble metal spheres 5 exposed to the surface side of the frit 4 flow under their own weight, and it is possible to simultaneously form a flow pattern by the traces. Similarly, when the ceramics 1 is rotated at the time of firing, the precious metal 5 flows by centrifugal force due to the rotation, and it is possible to simultaneously form a flow pattern by the traces.
[0019]
Further, as the noble metal 3 to be mixed into the liquid paint 2, an alloy of gold, silver, copper or a combination thereof or an alloy of a combination of platinum and palladium is used, but other noble metals can be applied. The use of these noble metals may be changed as appropriate in consideration of the decorative harmony with the ceramic material.
[0020]
【The invention's effect】
As described above, in the present invention, 85 to 95% of a powdery noble metal and 5 to 15% of a frit for ceramics are mixed, and water and, if necessary, a paste are added to the liquid. A paint is prepared, and the paint is applied to a surface of a ceramic which has been baked in advance to a thickness of 0.1 mm or more, and the whole is in a temperature range not lower than the melting point of the noble metal and not higher than the melting point of the glaze used for the ceramic. By baking within, the powdery noble metal is melt-agglomerated to generate a large number of noble metal spheres of different sizes, and the majority of each noble metal sphere is exposed to the outside, and a part of each noble metal sphere Is attached to the surface of the ceramic through the frit, so that the surface of the ceramic has a large number of noble precious metal spheres of different sizes, shining brightly, and decorative patterns (like large and small jewels of different sizes studded) Decorative pattern) It is.
[0021]
Further, in the present invention, the noble metal sphere being generated on the surface of the ceramic can be caused to flow by tilting or rotating the ceramic at the time of firing, and it is possible to simultaneously form a flow pattern by the trace of the flow. .
[Brief description of the drawings]
FIG. 1 relates to an embodiment of the present invention, in which FIG. 1A is a longitudinal sectional view showing a state in which a liquid paint is applied to the surface of a previously fired ceramic, and FIG. , And FIG. (C) is a longitudinal sectional view of the ceramic showing a state after firing.
[Explanation of symbols]
1. Ceramics, 2. Liquid paint, 3. Precious metal, 4. Frit, 5. Precious metal ball

Claims (2)

A powdery noble metal of 85 to 95% and a frit for ceramics of 5 to 15% are mixed, and a liquid paint is prepared by adding water and, if necessary, a paste, and the paint is fired in advance. The powdery noble metal is applied to the surface of the placed ceramic by applying a thickness of 0.1 mm or more and calcining the whole at a temperature not lower than the melting point of the noble metal and not higher than the melting point of the glaze used for the ceramic. Melted and agglomerated to generate a large number of noble metal spheres of different sizes, to expose most of each noble metal sphere to the outside, and to attach a part of each noble metal sphere to the surface of ceramics via a frit A method for decorating ceramics with precious metals. The method for decorating ceramics with a noble metal according to claim 1, wherein the ceramics are inclined at the time of firing so that the noble metal spheres generated on the surface of the ceramics flow under their own weight to form a flow pattern by traces of the flow. .

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