Blue tungsten oxide or tungsten oxide is mixed with trace amounts of K2O, Al2O, or silicon dioxide to produce doped tungsten wire, which has higher performance than ordinary tungsten wire and is widely used in microwave ovens, televisions, welding materials, and special lighting.
The addition of rhenium can significantly improve the ductility (plastic) and recrystallization temperature. Some tungsten-rhenium alloys have an elongation of 5% after proper annealing, which is better than pure tungsten. The formation of increased thorium oxide (ThO2) tungsten-thorium alloy has high thermal electron emission capability and can be used as hot cathode tubes and welding rods, but the long-term radioactivity of ThO2 has not been solved.
The long production process of doped tungsten wire includes the main stages of billet metallurgy, powder metallurgy and metal forming systems.
Advantages of doped tungsten wire
W31: W31 wire is standard doped tungsten wire with excellent non-sag properties.
W91: W91 wire is a non-sag wire that operates at higher temperatures than W31 wire. They are suitable for halogen lamp filaments. Doped tungsten wire maintains inter-particle strength and produces higher non-sag properties at elevated temperatures, reducing impurity content and suppressing inefficiencies using our own technology.
