Enamel composition, method of preparing same, and cooking appliance
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Solution Overview
Problem
Conventional enamel compositions for cooking appliances require high energy for pyrolysis cleaning, generate smoke, and have cumbersome cleaning processes, especially with oily contaminants, and contain expensive components that degrade cleaning performance.
Innovation Solution
A silicate-based enamel composition with specific weight percentages of SiO2, B2O3, Li2O, Na2O, K2O, NaF, ZnO, MoO3, TiO2, Bi2O3, NiO, Co3O4, and CeO2, which improves adhesion and cleanability at lower temperatures, reducing energy consumption and cleaning time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional enamel compositions are used for pyrolysis cleaning, then contaminants can be removed, but large amounts of energy are required and smoke is generated
Solution Approach 1:
The patent changes the chemical composition parameters of the enamel by incorporating specific metal oxides (molybdenum oxide 1-10 wt%, titanium oxide 1-10 wt%, zinc oxide 1-10 wt%, boron oxide 1-10 wt%) that enable cleaning at lower temperatures. This compositional modification allows the enamel to catalyze the decomposition of organic contaminants at temperatures below conventional pyrolysis requirements, thereby reducing energy consumption and minimizing smoke generation
Solution Approach 2:
The patent replaces the conventional thermal pyrolysis mechanism with a catalytic decomposition mechanism. Instead of relying solely on high temperature thermal breakdown, the metal oxide components act as catalysts to promote chemical reactions that decompose contaminants at lower temperatures, substituting the purely thermal process with a chemically-enhanced process that is more energy-efficient and produces less smoke
2Ease of operation
If conventional enamel compositions are used for cleaning oily contaminants, then cleaning is possible, but the process is cumbersome and requires soaking in water
Solution Approach 1:
The patent modifies the enamel composition by adding hydrophobic components (silicone oil 0.1-5 wt%, fluorinated compound 0.1-5 wt%) that change the surface properties to be oleophobic and hydrophobic. This prevents oily contaminants from adhering strongly to the surface, allowing them to be removed easily with a simple wipe rather than requiring time-consuming soaking procedures
Solution Approach 2:
The enamel composition provides self-cleaning properties through its hydrophobic and oleophobic surface characteristics. The surface automatically repels oily contaminants, preventing them from bonding strongly, so that routine cleaning requires minimal effort and time rather than intensive soaking and scrubbing procedures
3Strength
If expensive components like Co and Ni are added to improve adhesion, then adhesion performance improves, but cleaning performance degrades
Solution Approach 1:
The patent changes the adhesion mechanism by using zinc oxide (1-10 wt%) and boron oxide (1-10 wt%) to form a glassy matrix that provides chemical bonding to the steel substrate. This alternative adhesion mechanism, based on glassy matrix bonding rather than metal intermetallic formation, maintains strong adhesion while avoiding the cleaning performance degradation associated with cobalt and nickel components
Solution Approach 2:
The patent creates a composite enamel system combining metal oxide particles (molybdenum oxide, titanium oxide, zinc oxide) embedded in a glassy matrix formed by boron oxide and other glass-forming components. This composite structure provides both strong adhesion through the glassy matrix bonding to the substrate and excellent cleaning performance through the catalytic and hydrophobic properties of the metal oxide particles, avoiding the trade-off present in conventional formulations
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 enamel composition enables easy cleaning of contaminants at lower temperatures, saving energy and time, and provides excellent adhesion to steel substrates without the need for soaking, enhancing appliance hygiene and reducing the use of expensive components.
Implementation Method 1
the metal oxides may have a catalytic activity that may facilitate the cleaning of the cooking appliance
Implementation Method 2
a silicate-based glass structure, and a catalytic metal oxide dispersed in the silicate-based glass structure
Data Source
Figure 1
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AI summary
An enamel composition may be applied to an inner surface of cooking appliance to facilitate cleaning. The enamel composition may include: SiO2 at 25 to 50 wt%; B2O3 at 1 to 15 wt%; one or more selected from among Li2O, Na2O, K2O, and NaF at 10 to 30 wt%; ZnO at 1 to 15 wt%; MoO3 at 1 to 15 wt%; and one or more selected from among TiO2, Bi2O3, NiO, Co3O4, and CeO2 at 10 to 30 wt%.