The biggest difference between halogen oven bulbs and other incandescent oven bulbs is that the halogen oven bulbs glass shell filled with halogen gas (usually iodine or bromine), its working principle is that when the filament is heated, the tungsten atoms are evaporated to move toward the glass wall, when approaching the glass wall, The tungsten vapor is cooled to about 800 ° C and combined with the halogen atoms to form tungsten halide (tungsten iodide or tungsten bromide).Tungsten halides continue to move towards the center of the glass tube and return to the oxidized filaments again. Tungsten halide is a very unstable compound, it re-decomposes to halogen vapors and tungsten when it is heated.Then tungsten is deposited on the filament again to make up for the evaporated portion.
E14 halogen oven bulbs
Through this recycling cycle, the service life of the filament has been greatly extended (almost four times that of an incandescent lamp), and at the same time as the filament can operate at a higher temperature, resulting in higher brightness, higher color temperature and Higher luminous efficiency.
G9 halogen oven bulbs
1. The function of a halogen oven lamp is to set a reversible chemical reaction with the evaporation of tungsten from the filament.
2. In ordinary incandescent oven lamps, this is mainly deposited on tungsten bulbs. Halogen cycling keeps the bulb clean and almost constant light output over the lifetime.
3. At moderate temperatures, the evaporated tungsten reacts with the halogens and forms a halogenated side-to-side movement that is filled with an inert gas. Over time, a higher temperature region will be reached where it dissociates, releases tungsten and releases halogen, repeating the process.
4. For the reaction to operate, the global bulb temperature must be higher than in conventional incandescent oven lamps. The bulb must be made of fused silica (quartz) or glass with a high melting point (such as aluminosilicate glass).