Oxide Glass Composition for Light-Shielding and Low Specific Gravity
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Solution Overview
Problem
Existing glass technologies face challenges in manufacturing cover glass with excellent light-shielding and light-transmitting properties while maintaining a low specific gravity, which can lead to breakage and warping during production.
Innovation Solution
The development of oxide glass with specific compositions, including P5+, Nb ions, Bi ions, and Li+, which form a light-shielding portion with excellent light-shielding properties and a light-transmitting portion with high transmittance, all while maintaining a low specific gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the weight of the glass sheet is increased to improve light-shielding properties, then light-shielding performance is improved, but the glass is more likely to be broken and warped during production
Solution Approach 1:
The patent changes the chemical composition parameters of the glass by incorporating specific amounts of PbO (10-30 mass%), Bi2O3 (0.1-5 mass%), and Nb2O5 (0.1-5 mass%) to achieve optimal light-shielding properties while maintaining mechanical strength and reducing susceptibility to breakage and warping during production
Solution Approach 2:
The patent creates a composite glass material combining multiple oxide components (PbO, Bi2O3, Nb2O5, SiO2, B2O3, etc.) that work synergistically to provide both excellent light-shielding properties and improved mechanical stability, preventing breakage and warping during manufacturing
2Strength
If the specific gravity of the glass is reduced to minimize breakage and warping, then production reliability is improved, but light-shielding properties may be compromised
Solution Approach 1:
The patent optimizes the specific gravity parameter by controlling the content of heavy metal oxides (PbO: 10-30 mass%, Bi2O3: 0.1-5 mass%) to achieve a balance between low specific gravity for production stability and sufficient light-shielding capability through the synergistic effect of these oxides
Solution Approach 2:
The patent applies light-shielding oxides (PbO, Bi2O3, Nb2O5) at specific concentrations within the glass matrix to provide localized light-shielding functionality while maintaining overall low specific gravity and production reliability
3Object-affected harmful factors
If a colored layer is added to the glass to achieve light-shielding properties, then light-shielding performance is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the light-shielding function with the base glass material by incorporating light-shielding oxides (PbO, Bi2O3, Nb2O5) directly into the glass composition, eliminating the need for separate colored layers and simplifying the manufacturing process to a single integrated glass forming operation
Solution Approach 2:
The patent makes the glass material itself multi-functional by incorporating oxides that simultaneously provide structural integrity, light-shielding properties, and coloration, eliminating the need for separate functional layers and reducing manufacturing complexity
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 proposed glass composition achieves excellent light-shielding and light-transmitting properties for visible light, while also reducing the specific gravity of the glass, thereby minimizing breakage and warping during production.
Implementation Method 1
a content of Nb ions is 10 to 21 cation %, a content of Bi ions is more than 0 cation % and is equal to or less than 6 cation %
Implementation Method 2
a content of P5+ is 7 to 43 cation %, a content of Li+ is 20 cation % or more
Data Source
AI summary
Provided is oxide glass in which a content of P5+ is 7 to 43 cation %, a content of Nb ions is 10 to 21 cation %, a content of Li+ is 20 cation % or more, a total content of Nb ions and Li+ is 48 to 70 cation %, a content of Bi ions is more than 0 cation % and is equal to or less than 6 cation %, a content of Ba2+ is 5 cation % or less, a content of Zr4+ is 2 cation % or less, a total content of Ti ions and W ions is 5 cation % or less, and a cation ratio of the content of Li+ to a total content of Li+, Na+, and K+[Li+/(Li++Na++K+)] is 0.5 or more.