What Is the Role of Tungsten Wire in Vacuum Technology?

Tungsten wire has important applications in vacuum technology. Its main uses include:

Electron emission source: Tungsten wire is often used as one of the main materials of electron emission source. When the tungsten wire is heated, it emits electrons, which can be used in vacuum electron tubes, television picture tubes and some ray-emitting equipment. This type of electron emission source is called a thermionic emission source.

Vacuum electron tubes: Tungsten wire is widely used in various types of vacuum electron tubes, such as triodes, tetrodes, diodes, etc. In these tubes, a tungsten filament acts as a hot cathode, generating and sustaining the emission of electrons, thereby controlling the current flow.

Vacuum melting and heat treatment: Tungsten wire is used as a heating element during vacuum melting and heat treatment. Due to its high melting point and corrosion resistance, tungsten wire can work stably at high temperatures, making it very suitable for applications in these high-temperature, vacuum environments.

Vacuum Packaging: Tungsten wire is also used to make vacuum packaging. Vacuum packaging is often used to protect highly sensitive electronic and semiconductor devices from damage caused by oxygen and moisture. Tungsten wire can be used to seal these vacuum packages to ensure a stable internal environment.