Phosphate Glass Coating for Heat-Resistant Cooking Appliance Surfaces
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Solution Overview
Problem
Existing glass compositions for cooking appliances lack sufficient heat resistance, chemical resistance, wear resistance, and contamination resistance, making them inadequate for high-temperature cooking environments and easy cleaning.
Innovation Solution
A glass composition comprising P2O5, a Group I-based oxide (such as Na2O, K2O, or Li2O), and a Group III-based oxide (such as Al2O3 or B2O3), with additional components like ZnO, TiO2, SiO2, ZrO2, and CaO, which forms a coating with high transmittance and improved cleaning performance, heat resistance, and chemical durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional glass compositions are used in cooking appliances, then the basic structural integrity is maintained, but the heat resistance, chemical resistance, wear resistance, and contamination resistance are insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters of the glass by incorporating specific amounts of P2O5 (40-75 wt%), Group I-based oxides (10-30 wt%), and Group III-based oxides (5-20 wt%). This parameter change transforms the glass properties to achieve superior heat resistance, chemical resistance, wear resistance, and contamination resistance while maintaining manufacturability through conventional glass manufacturing processes
Solution Approach 2:
The patent creates a composite glass material by combining multiple oxide components (P2O5, Group I-based oxides, Group III-based oxides, and optional additional oxides like ZnO, TiO2, SiO2, ZrO2, CaO, MgO, BaO, and WO3). This composite structure synergistically provides enhanced heat resistance, chemical resistance, wear resistance, and contamination resistance that individual components cannot achieve alone
2Reliability
If a glass composition with improved resistance properties is developed, then the performance in cooking appliances is enhanced, but the light transmittance may be reduced
Solution Approach 1:
The patent optimizes the composition parameters to balance resistance properties and transmittance. By controlling the ratios of P2O5 (40-75 wt%), Group I-based oxides (10-30 wt%), and Group III-based oxides (5-20 wt%), and selecting specific additional oxides with appropriate refractive indices, the glass achieves both enhanced heat and chemical resistance while maintaining high light transmittance suitable for cooking appliance doors
Data Source
AI summary
Provided are a glass composition, preparation method thereof, and cooking appliance including the glass composition. The glass composition includes a glass frit containing P2O5, a Group I-based oxide, and a Group III-based oxide. The Group I-based oxide is selected from Na2O, K2O, and Li2O, the Group III-based oxide is selected from Al2O3 and B2O3, and the glass frit contains about 40 wt % to about 75 wt % of P2O5.