What is the difference between doped tungsten wire and pure tungsten wire?
The pure tungsten wire has already crystallized completely when the temperature reaches 1800°C, while the doped tungsten wire has not yet crystallized and still retains the processed structure. When the temperature reaches 2300°C, the crystal grains in the pure tungsten wire grow very much. Recrystallization of the doped tungsten wire has not yet occurred.
The series of potassium bubbles formed in the doped tungsten wire not only significantly improve the sagging resistance of the tungsten wire, increase the recrystallization temperature, but also make the wire still have good plasticity in the recrystallized state.
