Crystallized Glass Windowpane Coating to Reduce Heat-Induced Cracking
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Solution Overview
Problem
Existing windowpanes for combustion apparatuses face issues with crack formation due to heat and inadequate light-blocking properties, which fail to effectively hide gaskets or adhesives, impacting design quality and functionality.
Innovation Solution
A windowpane with a light-blocking layer containing 30-50% inorganic pigment powder and 50-70% glass powder, with an average particle size of 0.8 µm or less, applied to the peripheral surface of a transparent crystallized glass plate, providing improved thermal shock resistance and light-blocking properties while hiding gaskets or adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light-blocking layer contains a relatively large amount of inorganic pigment powder, then the light-blocking property is improved, but the layer becomes porous and cracks are likely to occur due to heat
Solution Approach 1:
The invention changes the particle size parameter of the inorganic pigment powder to 0.8 μm or less, which fundamentally alters the layer's structural properties. This fine particle size enables high filling rates that achieve excellent light-blocking properties while maintaining layer density and preventing crack formation under thermal stress
Solution Approach 2:
The invention creates a composite light-blocking layer combining inorganic pigment powder with glass powder in a specific ratio (30-50% pigment, 50-70% glass). This composite structure leverages the light-blocking capability of the pigment while the glass powder provides structural integrity and thermal stability, preventing porosity and cracking
2Illumination intensity
If the light-blocking layer is made dense to improve appearance, then the light-blocking property is improved, but cracks are likely to occur with prolonged use
Solution Approach 1:
The invention changes the particle size parameter of the inorganic pigment powder to 0.8 μm or less, which fundamentally alters the layer's structural properties. This fine particle size enables high filling rates that achieve excellent light-blocking properties while maintaining layer density and preventing crack formation under thermal stress
Solution Approach 2:
The invention creates a composite light-blocking layer combining inorganic pigment powder with glass powder in a specific ratio (30-50% pigment, 50-70% glass). This composite structure leverages the light-blocking capability of the pigment while the glass powder provides structural integrity and thermal stability, preventing porosity and cracking
3Illumination intensity
If the light-blocking layer contains more inorganic pigment powder, then the light-blocking property is improved, but the appearance becomes poor due to insufficiency of light-blocking property
Solution Approach 1:
The invention changes the particle size parameter of the inorganic pigment powder to 0.8 μm or less, which fundamentally alters the layer's structural properties. This fine particle size enables high filling rates that achieve excellent light-blocking properties while maintaining layer density and preventing crack formation under thermal stress
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 solution reduces crack occurrence and spots due to heat or water, ensuring effective light-blocking and maintaining the windowpane's appearance and thermal shock resistance.
Implementation Method 1
the light-blocking layer contains 30 to 50% by mass of the inorganic pigment powder... the filling rate of the inorganic pigment powder in the light-blocking layer becomes high, which can improve the light-blocking property
Implementation Method 2
low-expansion transparent crystallized glasses are generally used... high thermal shock resistance... the occurrence of cracks due to heat can be reduced
Data Source
Figure 1~2
AI summary
Provided is a windowpane for a combustion apparatus in which a light-blocking layer containing an inorganic pigment powder and a glass powder is formed on a surface of a transparent crystallized glass plate and the light-blocking layer can sufficiently hide an adhesive, a gasket or the like used to fix the windowpane to the body of the combustion apparatus and which can reduce the occurrence of cracks due to heat in the light-blocking layer. A windowpane for a combustion apparatus in which a light-blocking layer containing an inorganic pigment powder and a glass powder is formed on a surface of a transparent crystallized glass plate, wherein the light-blocking layer contains 30 to 50% by mass of the inorganic pigment powder and 50 to 70% by mass of the glass powder and has a thickness of 1 to 10 µm and the inorganic pigment powder has an average particle size of 0.8 µm or less.