Glass Composition for Touch Screens with High Compressive Stress
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Solution Overview
Problem
Existing glass compositions for touch screens fail to meet the requirements for high mechanical strength, damage resistance, and toughness, necessitating a composition and preparation method that enhances overall mechanical properties.
Innovation Solution
A glass composition comprising SiO2, Al2O3, MgO, Na2O, P2O5, and TiO2, treated through mixing, melting, homogenization, cast molding, annealing, and chemical strengthening, which results in improved mechanical properties such as high compressive stress, fracture toughness, and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing glass compositions are used, then the glass can be manufactured with standard processes, but the mechanical strength and toughness are insufficient for touch screen cover plates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the chemical composition parameters of the glass, including SiO2 content at 45-64wt%, Al2O3 at 16-26wt%, MgO at 0.1-2wt%, Na2O at 10-17wt%, P2O5 at 0.5-15wt%, and TiO2 at 0.01-2wt%. This systematic adjustment of compositional parameters enables the glass to achieve both high mechanical strength and excellent toughness, resolving the contradiction between these two properties
Solution Approach 2:
The patent employs composite materials by creating a multi-component glass system that combines various oxides with complementary properties. The synergistic combination of SiO2 (providing structural framework), Al2O3 (enhancing strength), MgO (improving toughness), Na2O (controlling melting and expansion), P2O5 (modifying network structure), and TiO2 (enhancing chemical resistance) produces a composite glass material that simultaneously achieves high mechanical strength and toughness
2Strength
If glass composition is optimized for high strength, then damage resistance improves, but chemical resistance and heat resistance may deteriorate
Solution Approach 1:
The patent uses parameter changes to simultaneously optimize multiple properties by adjusting the chemical composition within specific ranges. The SiO2 content is maintained at 45-64wt% to provide both mechanical strength and chemical resistance, while Al2O3 at 16-26wt% enhances strength without compromising chemical stability. The balanced composition ensures that damage resistance, chemical resistance, and heat resistance are all improved together
3Strength
If glass composition is optimized for high strength, then damage resistance improves, but heat resistance may deteriorate
Solution Approach 1:
The patent applies parameter changes by controlling the glass composition to achieve a strain point of 600-700℃ and a melting temperature of 1500-1650℃. The SiO2 content of 45-64wt% and Al2O3 content of 16-26wt% are specifically adjusted to provide both high mechanical strength and excellent heat resistance, ensuring the glass can withstand both mechanical damage and thermal conditions
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 glass exhibits enhanced mechanical properties like high compressive stress, fracture toughness, and chemical resistance, reducing brittleness and improving impact resistance, making it suitable for touch screen cover plates with excellent heat, scratch, and abrasion resistance.
Implementation Method 1
treating the above-mentioned composition for glass by mixing, melting, homogenization, cast molding, and annealing sequentially
Implementation Method 2
treating the above-mentioned composition for glass by mixing, melting, homogenization, cast molding, and annealing sequentially
Implementation Method 3
the method further comprises: treating the annealed glass by slicing, polishing, and chemical strengthening
Data Source
AI summary
The invention provides a composition for glass, a glass, and a preparation method and application thereof. On an oxide basis, the composition for glass contains 45-64wt% SiO2, 16-26wt% Al2O3, 0.1-2wt% MgO, 10-17wt% Na2O, 0.5-15wt% P2O5, and optionally 0-2wt% TiO2. The glass prepared from the composition for glass has a higher chemical resistance, a higher strain point, and a higher compressive stress and depth of compressive stress layer formed on the glass surface, and the glass has a higher Young's modulus.