The halogen cycle has many effects on tungsten wire, which are mainly reflected in extending the service life of tungsten wire and maintaining the relative constant brightness of the bulb. The following is a detailed analysis of the specific effects of halogen cycle on tungsten wire:
- Extend the service life of tungsten wire
Reduce tungsten wire loss:
In a halogen bulb, when the bulb is lit, the tungsten wire is heated and emits light. Over time, the continuous high temperature will cause the tungsten wire to gradually sublimate and become thinner, which is the main reason for the loss of tungsten wire.
The existence of the halogen cycle mechanism enables the sublimated tungsten to react chemically with the halogen gas to generate tungsten halides and attach to the inner wall of the bulb. When the bulb is turned off, the tungsten halides will decompose back into halogen and tungsten, and tungsten will return to the filament. This process effectively reduces the loss of tungsten wire.
Prevent filament aging and sintering:
The halogen cycle not only reduces the loss of tungsten wire, but also prevents aging and sintering of the filament by continuously re-solidifying tungsten on the filament. This further extends the service life of the tungsten wire and the overall life of the halogen bulb.
- Keep the brightness of the bulb relatively constant
Brightness stability:
Since the halogen cycle can effectively re-solidify the sublimated tungsten on the filament, this ensures that the filament will not become too thin due to sublimation during long-term use, thereby maintaining the relative constant brightness of the bulb.
Improve luminous efficiency:
The halogen cycle mechanism enables halogen bulbs to operate at very high temperatures, so that the filament can emit light radiation more efficiently. This improves the luminous efficiency of halogen bulbs and makes their brightness higher than that of traditional incandescent bulbs.
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