Vacuum Glass Sealing via Metallization Paste
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Solution Overview
Problem
Existing vacuum glass components face challenges in processing tempered glass due to heating requirements for sealing, which anneals the glass, and metal sealing methods compromise heat insulation and appearance.
Innovation Solution
A vacuum glass component is formed by sealing glass plates with high-temperature sintering metallization paste, followed by hermetic welding of metallized layers using metal brazing technology, with a gap between the sealing part and the glass edge, isolated from the outer environment by seal gum or plastic, allowing for tempered glass processing without annealing and maintaining insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass powder with low-melting point is used to seal the periphery of glass plate, then the glass plate can be sealed, but the glass plate needs to be heated till the glass powder is melted which results in annealing of tempered glass plate
Solution Approach 1:
The patent changes the sealing material from low-melting-point glass powder to high-temperature metallization paste that can withstand tempering temperatures (560-700°C), allowing the sealing process to occur after tempering without annealing the glass. This parameter change in material composition resolves the contradiction between achieving reliable sealing and avoiding temperature-induced annealing.
2Strength
If metal sheet is used to seal the periphery of glass plate in air-tight method, then the sealing is strong, but the metal sealing sheet forms a heat bridge which compromises heat insulation performance
Solution Approach 1:
The patent applies local quality by using metallization paste only at the edge sealing areas where structural strength is needed, while the main glass plate surface maintains its thermal insulation properties. The metallized layers provide localized sealing strength without creating extensive heat bridges across the entire glass surface.
Solution Approach 2:
The patent uses composite materials by combining glass plates with metallization paste coatings to create a hybrid sealing structure. The metallization paste contains metal particles embedded in a glass matrix, providing both the sealing strength of metal and the thermal insulation properties of glass, thus resolving the contradiction between sealing strength and heat insulation.
3Loss of energy
If metal sealing sheet is extended out of the edge of glass plate to prevent heat bridge, then heat insulation is improved, but the appearance is compromised and installation becomes inconvenient
Solution Approach 1:
The patent merges the sealing function and the aesthetic edge finish into a single integrated structure. The metallization paste is applied directly at the glass edge and sintered to form a seamless sealing layer that maintains the glass plate's original dimensions and appearance, eliminating the need for extended metal sheets and simplifying installation while preserving heat insulation performance.
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
This method provides a firm, airtight, thermally resistant seal that allows for tempered glass processing while preventing heat bridges, ensuring the vacuum glass component's insulation and ease of installation, with a low brazing temperature that does not anneal the glass, and maintains a level, parallel edge for aesthetic purposes.
Implementation Method 1
Heating the glass plate, wherein the metallization paste coating is sintered to be a metallized layers solidified together with the body of the glass plate
Implementation Method 2
the sintering temperature of the high temperature type metallization paste is 560-700 Celsius
Implementation Method 3
connecting the metallized layer of the two glass plates to be sealed by hermetic welding, or connecting the metal sealing plates by hermetic welding between the metallized layers of the two glass plates so as to realize the hermetic sealing at the edges of the two glass plates
Implementation Method 4
the sintering temperature of the sintering technology in the step 2) is within the tempering temperature range of the glass plate, and the tempering treatment of the glass plate is finished by quick cooling directly after the glass plate being carried out sintering technology treatment
Data Source
AI summary
The present invention discloses a vacuum glass component, wherein the vacuum glass component is formed by compounding two or a plurality of glass plates, and the peripheries of the two or a plurality of glass plates are sealed with each other through sealing part in air-tight manner, a gap remains between the sealing part and the edge of the glass plate, vacuum-pumping is performed between adjacent glass plates at the inner side of the sealing part, and the sealing part is isolated from the outer environment between adjacent glass plates at the outer side of the sealing part by filling seal gum, resin or plastic. The vacuum glass component make the outer side of the sealing part isolated from the outer environment by using seal gum, resin or plastic, thereby preventing the metal at the sealing part from forming a heat bridge and facilitating the later installation and use of vacuum glass component. Moreover, the surface at the side edge of the vacuum glass component can be trimmed to be parallel and level by setting seal gum, resin or plastic, thereby keeping the beautiful appearance of the vacuum glass component.