Typical Applications Of Lead Free Vacuum Glazing
Typical applications of lead free vacuum glazing include the production of high quality glass for the automotive, pharmaceutical, and electronics industries, among others. There are also several developments in this field, including the application of Artificial Intelligence (AI) methods to analyse vacuum glazing, and the potential for new applications in the future.
Developments
Integrated vacuum glazing technology includes laser-assisted hermetic sealing, scalable pulse thermal processing, and additive manufacturing of low thermal conductivity pillar spacers. These technologies can be used in tandem with existing glass technologies to reduce heating energy consumption, improve thermal performance, and provide more durable glazing over the service life of the product. In terms of energy efficiency, it’s important to note that windows account for a significant portion of the heat lost in a home. For example, a Scout study suggests that the energy associated with window conduction is 3.9 Quads for climate zones 1-3. This figure is not likely to be much higher for other regions.
In fact, according to a Thomsen executive, the new VIG is expected to make its debut in Europe first. Although no actual finished windows are yet produced, the company expects a market launch in early 2012. The main advantage of the new technology is its lower weight. A key component is the array of support pillars. The pillars serve to isolate the vacuum cavity and prevent damage to the glass panes. They are generally 0.2 mm in diameter and 0.1 mm in height, and are made from a high compressive strength material. The pillars may be of a soft material, such as carbon, in order to reduce the stress in the glass plates.
Typical Applications
Typical applications of lead free vacuum glazing are a thin, light, and ultra-high performance product for new construction and renovation. It offers acoustic insulation and the same thermal performance of triple glazing. The product is fully recyclable, and can be integrated into existing or new construction. This product features a thin, transparent gap, which is tenths of a millimeter wide, and is evacuated at pressures of 0.1 Pa. Typically, the spacers are filled with desiccant to remove moisture and lower the dew point of the gas. It also reduces noise when external noise is an issue.
The product is manufactured at temperatures below 200 degC. The vacuum is achieved using a fusion edge seal, which involves coating the glass with a suitable B2O3 and/or Sn mixture. It is then fused with a hard Sn alloy. The main parameters that define the U-value are the spacer size, array spacing, the level of vacuum in the gap, and the low emissivity coating.
Fully Tempered Vacuum Glazing
FTVG is an innovative new type of environmental vacuum insulting glazing. It is made up of two fully tempered glass sheets with a low-emissivity coating. Its heat transfer mechanisms include conduction and thermal radiation. It is installed in the same way as traditional insulation glass. FTVG is developed by Panasonic to provide noiseless visibility and high heat insulating performance. It is also very manageable and light weight. It is widely used in glass windows and glass facades. It is easy to install and fit into existing window frames. It has excellent impact resistance and wind pressure resistance. It is more energy efficient and has a better insulation value.
FTVG is composed of two 4- or 5-mm thick fully tempered glass sheets. A supporting ball array, consisting of 60 mm diameter balls, is placed in an equilateral triangle mode. This reduces the number of support spacers. The radius of the ball should be 0.25 mm. The 3D finite element model of the center unit cell of FTVG has been established to determine the thermal transmission. The predicted U-values are 0.26 W/m2 K. They are in good agreement with the mathematical model.
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