White Glass Composition for Scratch-Resistant Housings
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Solution Overview
Problem
Conventional materials used for electronic device housings, such as plastics and resins, are prone to scratches, and tiles used in tunnels suffer from reduced cleaning and reflection capabilities due to surface scratches during handling, necessitating a material that is scratch-resistant, washable, and maintains reflection properties.
Innovation Solution
A white glass composition comprising specific mole percentages of SiO2, B2O3, Al2O3, MgO, CaO, SrO, BaO, ZrO2, Na2O, and P2O5, with a compressive stress layer and phase-separated structure, providing enhanced mechanical strength, scratch resistance, and light-shielding properties without the need for additional coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastics or resins are used for electronic device housings, then cost and processability are improved, but scratch resistance deteriorates
Solution Approach 1:
The patent employs glass as a composite material that combines the advantages of both plastics and resins. The glass material provides high scratch resistance while maintaining ease of manufacturing through established glass forming processes. The specific compositional ranges of oxides create a glass structure that achieves both mechanical durability and manufacturability.
Solution Approach 2:
The patent utilizes parameter changes by precisely controlling the compositional ratios of various oxides in the glass. By adjusting the content ranges of SiO2, B2O3, Al2O3, and other components, the glass achieves optimal balance between scratch resistance and processability. The compositional parameters are specifically tuned to enable both desired mechanical properties and manufacturing feasibility.
2Ease of operation
If glaze is applied to tile surfaces to enhance cleaning ability and reflectance, then washability and reflection capability are improved, but surface strength deteriorates due to scratches during handling
Solution Approach 1:
The patent extracts the glaze coating layer from the tile structure and replaces it with a glaze-free glass material. This eliminates the vulnerable coating that prone to scratching during handling while maintaining the desired washability and reflectance properties inherent to the glass surface itself.
Solution Approach 2:
The patent uses a composite glass material that integrates the functions previously separated into substrate and coating layers. The glass composition itself provides the washable, reflective surface without requiring a separate glaze coating, thereby eliminating the strength weakness associated with coated surfaces.
3Ease of manufacture
If conventional glass compositions are used, then material availability is improved, but scratch resistance and mechanical strength deteriorate
Solution Approach 1:
The patent applies parameter changes by modifying the compositional parameters of conventional glass. Specific oxide content ranges are established to achieve enhanced scratch resistance and mechanical strength while maintaining compatibility with conventional glass manufacturing processes and material availability.
Solution Approach 2:
The patent implements local quality by creating specific compositional zones within the glass structure. The controlled distribution and concentration of oxide components create localized structural characteristics that enhance scratch resistance in critical surface regions while maintaining overall material availability and manufacturability.
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 white glass offers a cost-effective, scratch-resistant, and washable solution for electronic device housings and tunnel tiles, ensuring high reflectance and designability while preventing light leakage and maintaining aesthetic appeal.
Implementation Method 1
a white glass which comprises, in terms of mole percentage on the basis of oxides, from 50% to 74% of SiO2, from 0 to 8% of B2O3, from 1% to 8% of Al2O3, from 0 to 18% of MgO, from 0 to 7% of CaO, from 0 to 10% of SrO, from 0 to 12% of BaO, from 0 to 5% of ZrO2, from 5% to 15% of Na2O and from 2% to 10% of P2O5
Implementation Method 2
The white glass offers a cost-effective, scratch-resistant, and washable solution for electronic device housings and tunnel tiles, ensuring high reflectance and designability while preventing light leakage and maintaining aesthetic appeal
Data Source
AI summary
A white glass includes, in terms of mole percentage on the basis of oxides, from 50% to 74% of SiO2, from 0 to 8% of B2O3, from 1% to 8% of Al2O3, from 0 to 18% of MgO, from 0 to 7% of CaO, from 0 to 10% of SrO, from 0 to 12% of BaO, from 0 to 5% of ZrO2, from 5% to 15% of Na2O and from 2% to 10% of P2O5. In the white glass, a total content of CaO, SrO and BaO is from 1% to 22%, a total content RO of MgO, CaO, SrO and BaO is from 5% to 25% and a ratio CaO/RO of a content of CaO to the RO is 0.7 or less.