Since Edison invented the incandescent lamp, tungsten has been used in the field of lighting for more than 100 years. From the initial thermal radiation source to the more efficient gas discharge source, tungsten has never wavered in the core position of the electric light source. The emergence of electroluminescent light source has overturned people's general understanding of the material of electroluminescent light source, but tungsten as the core material of electroluminescent light source will exist for a long time. Tungsten materials are also widely used in various electronic vacuum devices, including magnetrons, high voltage rectifiers and so on.