Ceramic product
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Solution Overview
Problem
Ceramic products with decorative films containing noble metal elements face damage during washing due to poor chemical resistance, particularly when exposed to high temperature alkaline or acidic detergents, as the amorphous region lacks sufficient alkali and acid resistance.
Innovation Solution
Incorporating rare earth elements into the amorphous region of the decorative film, with a controlled mass concentration ratio of rare earth elements to noble metal elements (CR/CN) between 0.01 and 0.18, to enhance alkali resistance while maintaining acid resistance, and using specific noble metal elements like Pt for aesthetic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the content of noble metal in the decorative film is reduced to make the ceramic product microwaveable, then the safety for microwave use is improved, but the continuity of the noble metal region is lost and the amorphous region is more exposed to chemical damage
Solution Approach 1:
The patent changes the compositional parameters of the amorphous region by controlling the mass concentration ratios of rare earth elements to noble metal elements (CR/CN between 0.01 and 0.18) and matrix-forming elements to noble metal elements (CM/CN between 0.5 and 2.0). This parameter optimization enhances alkali resistance while maintaining acid resistance, allowing the decorative film to withstand dishwasher conditions even with reduced noble metal content for microwave safety.
Solution Approach 2:
The patent creates a composite amorphous matrix structure containing multiple elements: rare earth elements (CR), matrix-forming elements (CM), and noble metal elements (CN). This composite material approach combines the microwave safety of reduced noble metal content with the chemical resistance provided by rare earth elements and matrix-forming elements, resolving the contradiction between microwave usability and chemical durability.
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 controlled ratio of rare earth to noble metal elements in the ceramic product's decorative film improves chemical resistance, preventing damage during washing and maintaining aesthetic properties, even in microwaveable ceramic products.
Implementation Method 1
doping rare earth elements having a high affinity for oxygen into the amorphous matrix, thereby tightening the mesh structure, and preventing alkali ions from entering
Implementation Method 2
since rare earth oxides remain and form a coating after other components are eluted by exposure to alkaline chemicals, they are thought to have the effect of preventing alkaline erosion
Implementation Method 3
since this type of noble metal element has a strong catalytic effect, a decrease in alkali resistance may be accelerated due to hydrolysis of the amorphous matrix
Data Source
AI summary
A ceramic product can include a decorative film containing noble metal elements and matrix-forming elements. The matrix-forming elements of such a ceramic product can include at least a rare earth element. Thus, in the ceramic product disclosed here, the mass concentration CN of the noble metal elements obtained in FESEM-EDS analysis of the surface of the decorative film can be 11% or more and 70% or less, and the ratio (CR/CN) of the mass concentration CR of the rare earth elements to the mass concentration CN of the noble metal elements can be 0.01 or more and 0.18 or less. Since the decorative film of such a ceramic product can have both alkali resistance and acid resistance at a high level, the ceramic product can have sufficient chemical resistance and can prevent the decorative film from being damaged during washing.