Electrical contacts are the key components of switchgear, which bear the function of conducting current. Their performance directly affects the reliability and service life of switchgear. Therefore, switchgear requires electrical contacts to have good conductivity and thermal conductivity, low contact resistance and temperature rise, high resistance to fusion welding and electrical erosion.

Tungsten oxide has unique physical properties such as photochromism, electrochromism, thermochromism and gas sensitivity. Its color change can be achieved by changing irradiation wavelength, temperature or applied voltage. Therefore, tungsten oxide can be used in many fields, such as sensors, electronic devices and so on. The nature of Yue Yue, its development and research has become a hotspot all over the world.

Tungsten oxide nanowires are a kind of magical one-dimensional material, which can also be used to absorb radar electromagnetic wave, such as stealth fighter coatings, strategic missile concealment and so on.

With the development of high technology, the requirement for pure tungsten and its alloy materials is higher and higher. Whether tungsten wire, plate, foil, or other alloy materials based on tungsten (such as tungsten-copper electrical alloy, Tungsten-Nickel-Iron high specific gravity alloy, etc.) are required to have uniform structure, fine grain size and good plasticity. It also promotes the quality requirement of original tungsten powder. In the application, the particle size of advanced nano tungsten powder determines the powder metallurgy process and material properties of tungsten products. Nano-scale ultra-fine tungsten powder is becoming popular.