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What's Vacuum Insulated Glass?
Vacuum Insulated Glass (VIG) is a type of glazing that provides excellent thermal insulation by utilizing a vacuum between two or more glass panes. This vacuum acts as an insulator, significantly reducing heat transfer compared to conventional double or triple glazing.
What does Vacuum Insulated Glass (VIG) consist of?
1. Glass Panes
Outer Layers: Typically made of clear or low-emissivity (Low-E) glass to allow natural light while minimizing heat loss.
Thickness: The panes are often thinner than those used in traditional double or triple glazing, which helps reduce weight.
2. Vacuum Space
Vacuum: The space between the glass panes is evacuated to create a vacuum environment. This vacuum minimizes heat transfer through conduction and convection.
Pressure: The absence of air significantly reduces the transfer of thermal energy, enhancing insulation properties.
3. Support Structures
Pillars: Small ceramic or metal pillars (or spacers) are placed to maintain the distance between the glass panes. These pillars are designed to minimize thermal bridging while providing structural support.
Number of Pillars: The number and arrangement of these pillars can vary depending on the design and intended performance of the VIG.
4. Edge Sealing
Sealing Material: The edges of the glass panes are sealed with a robust sealant to maintain the vacuum and protect against moisture and air infiltration.
Durability: This sealing is crucial for the longevity of the vacuum integrity, preventing any leaks that could compromise insulation performance.
5. Low-Emissivity Coatings (Optional)
Glass Coatings: Low-E coatings can be applied to one or more of the glass surfaces to reduce the emissivity of the glass, further enhancing thermal performance by reflecting heat back into the room.
In summary, the interior of Vacuum Insulated Glass features two or more glass panes separated by a vacuum space, supported by pillars, and sealed at the edges. This design results in exceptional thermal insulation, making VIG an effective choice for energy-efficient applications.
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