Incandescent bulb tungsten wire put a small amount of red phosphorus, the reason is?
Within the bulb, red phosphorus and a small amount of oxygen react to produce phosphorus oxides
To prevent the tungsten wire is oxidized, not easy to blow.
Red phosphorus used as a deoxidizer, the oxygen reaction out
This causes the lamp to form a vacuum mode. When the lamp is working
The tungsten wire inside the bulb heat, because there is no oxygen, it will not form a tungsten wire oxidation, making tungsten wire to be protected.
