Luminescent Borate Glass Composition for High Intensity
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Solution Overview
Problem
Conventional luminescent borate glasses suffer from low luminous intensity, poor uniformity, and stability issues, which affect their performance in electronic fields such as laser and optical communication systems.
Innovation Solution
A luminescent borate glass with the chemical formula aM2O·bY2O3·cAl2O3·dB2O3·eSiO2·xCeO2·yTb2O3 is developed, where M represents Na, K, or Li, and specific mole parts ratios are used to enhance luminous intensity, uniformity, and stability, along with a preparation method involving melting and heat treatment to produce a glass suitable for high-intensity light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional luminescent borate glass is used, then the glass structure is simple and preparation is easy, but the luminous intensity is low and uniformity is poor
Solution Approach 1:
The patent optimizes the compositional parameters of the borate glass by specifying precise mole ratio ranges for each component (B2O3: 40-60%, Al2O3: 15-30%, SiO2: 5-15%, Y2O3: 5-15%, rare earth oxides: 0.1-5%). This parameter optimization resolves the contradiction by achieving high luminous intensity through controlled composition while maintaining preparation feasibility through reasonable processing temperatures (1400-1600℃).
Solution Approach 2:
The patent creates a composite glass system combining multiple oxide components (borate, aluminate, silicate) with rare earth metal oxides (Ce, Tb, Eu, etc.) as luminescent activators. This composite structure resolves the contradiction by integrating different functional components: the borate-aluminate-silicate matrix provides structural stability and workability, while the rare earth oxides provide high luminous intensity and color purity.
2Reliability
If conventional luminescent borate glass is used, then the preparation process is simple, but the uniformity and stability are poor
Solution Approach 1:
The patent applies preliminary homogenization treatment by melting the glass composition at 1400-1600℃ for 30-60 minutes before molding, followed by heat treatment at 500-700℃ for 2-4 hours to eliminate internal stresses and prevent crystallization. These preliminary actions resolve the contradiction by ensuring compositional uniformity and structural stability before final product formation, thereby improving reliability without requiring overly complex equipment.
Solution Approach 2:
The patent specifies precise heat treatment parameters (temperature range: 500-700℃, time: 2-4 hours, atmosphere: reducing or neutral) to optimize the glass structure. These controlled parameter changes resolve the contradiction by achieving high stability through proper annealing that eliminates internal stresses and prevents crystallization, while keeping the process simple and equipment requirements reasonable.
3Illumination intensity
If sulfide-type phosphor is used for high luminous intensity, then the luminescent effect is intense, but the cathode deteriorates due to sulfide gas decomposition
Solution Approach 1:
The patent eliminates the harmful sulfide component entirely by using rare earth-activated borate glass as the luminescent material. This converts the harmful situation (sulfide decomposition causing cathode damage) into a beneficial solution (sulfide-free composition that is chemically stable and non-corrosive to the cathode), while maintaining high luminescent intensity through rare earth metal activation (Ce, Tb, Eu).
Solution Approach 2:
The patent replaces the short-lived sulfide phosphor with a stable, long-lasting borate glass luminescent material. The borate glass matrix provides excellent chemical stability and resistance to decomposition, ensuring long service life without cathode deterioration, while the rare earth activators maintain high luminescent efficiency.
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 resulting luminescent borate glass exhibits high luminous intensity, uniformity, and stability, making it suitable for illumination and display applications with improved performance and cost-effectiveness.
Implementation Method 1
the luminescent borate glass can be simply prepared into article... When radiated by UV having a wavelength in a range of 330- 380 nm... the luminescent borate glass has an excitation wavelength in a range of 330∼380 nm, an emission wavelength in a range of 530∼560 nm
Data Source
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AI summary
A luminescent borate glass and a preparation method thereof are disclosed. The preparation method includes: weighing raw materials according to a composition of the formula: aM2O·bY2O3·cAl2O3·d B2o3·eSiO2·xCeO2·y Tb2O3, wherein M represents at least one selected element from the group consisting ofNa, K, and Li; a, b, c, d, e, x, and y are, by mole parts, 0∼20, 7∼15, 20∼40, 40∼60, 0∼15, 0.1∼1.5, 0.1∼3, respectively; melting the raw materials and then cooling and molding; and heat treating the molded glass to obtain the luminescent borate glass. The luminescent borate glass prepared according to the method has some advantages such as high luminous intensity, uniformity and stability.