Ceramic product and decorative composition
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Solution Overview
Problem
Decorative films on ceramic products tend to peel off during washing with alkali due to the poor chemical resistance of the amorphous matrix, especially in products with reduced noble metal content.
Innovation Solution
A ceramic product with a decorative film structure that includes a noble metal region and an amorphous region with dispersed crystalline particles. The crystalline particles, made of crystalline oxides of matrix-forming elements like Zr and Ti, prevent alkaline components from penetrating the amorphous region, reducing damage to the decorative film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the noble metal content in the decorative film is reduced to lower costs and improve microwave compatibility, then the cost and microwave compatibility are improved, but the alkali resistance deteriorates because the exposed amorphous region increases
Solution Approach 1:
The patent applies composite materials by combining amorphous glass matrix with crystalline particles (such as zirconia, titania, or their composite oxides) to form a hybrid structure in the decorative film. This composite structure allows the amorphous region to provide flexibility and adhesion while the crystalline particles provide alkali resistance, solving the problem of reduced alkali resistance when noble metal content is lowered.
Solution Approach 2:
The patent applies local quality by creating regions with different properties within the decorative film - the amorphous glass matrix provides flexibility and adhesion in certain areas, while crystalline particles are distributed to provide localized alkali resistance. This spatial differentiation of material properties allows the film to simultaneously achieve good adhesion and high alkali resistance even with reduced noble metal content.
2Stability of the object's composition
If an amorphous matrix is used to fix the noble metal region, then the fixability is improved, but the chemical resistance deteriorates because the amorphous matrix has poor resistance to alkaline detergents
Solution Approach 1:
The patent combines amorphous glass matrix with crystalline particles to create a composite structure where the amorphous phase provides fixability and the crystalline phase provides chemical resistance. The crystalline particles (zirconia, titania, etc.) are distributed within the amorphous matrix, creating a hybrid material that exhibits both good adhesion and high resistance to alkaline detergents.
Solution Approach 2:
The crystalline particles act as intermediaries between the noble metal regions and the amorphous matrix, providing a barrier that protects the amorphous matrix from direct contact with and degradation by alkaline substances. This intermediary structure allows the amorphous matrix to maintain its fixability function while being protected from chemical attack.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The incorporation of crystalline particles significantly enhances the alkali resistance and water resistance of the decorative film, preventing peeling and maintaining the aesthetic properties of the ceramic product.
Implementation Method 1
crystalline particles containing a crystalline oxide of at least one metal element selected from among the matrix-forming elements as a main component are dispersed in the amorphous region. Since it is difficult for alkaline components to structurally penetrate such crystalline particles, it is possible to prevent the alkaline components from entering the amorphous region.
Implementation Method 2
Since it is difficult for alkaline components to structurally penetrate such crystalline particles, it is possible to prevent the alkaline components from entering the amorphous region.
Data Source
AI summary
According to the present invention, there is provided a ceramic product in which damage to a decorative film during washing with an alkali can be reduced. In a ceramic product 1 disclosed here, a decorative film 30 is formed on the surface of a ceramic substrate 10. Here, the decorative film 30 of the ceramic product includes a noble metal region 32 containing a noble metal element as a main component and an amorphous region 34 containing matrix-forming elements containing at least Si as a main component. Here, in the ceramic product 1 disclosed here, crystalline particles 35 containing a crystalline oxide of at least one metal element selected from among the matrix-forming elements as a main component are dispersed in the amorphous region 34. Since such crystalline particles 35 are difficult for alkaline components to penetrate, it is possible to prevent the alkaline components from entering the amorphous region 35 and reduce damage to the decorative film 30 during washing with an alkali.