In lighting, tubes of silica glass are used to envelope the high temperature tungsten filament. A halogen lamp is an incandescent lamp with a tungsten filament contained within an inert gas and a small amount of a halogen such as fluorine, chlorine, iodine or bromine.
The glass in the halogen lamp glass must have excellent optical transmission properties and ability to withstand extreme temperatures and thermal shock without being deformed. The tungsten filament glows at a temperature of 2500°C only a few mm away from the glass wall. Only high purity quartz glass can be used for this application.
Quartz glass tubes are made in a continuous melting process. The tubes are then divided in smaller parts that are shaped to bulbs.
For our full range of products please download our data sheets.
For detailed formulation advice please contact us.