Barium tungsten electrode is a hot cathode material widely used in vacuum electronic devices, known for its high electron emission ability and stability. The uniformity of electron emission is crucial to improving device performance, optimizing current distribution and extending service life.

Barium tungsten electrode plays an important role as cathode material in photomultiplier tube. Photomultiplier tube is a highly sensitive photodetector, which is widely used in particle physics, nuclear physics, astrophysics and other fields to detect weak light signals. Its working principle is to use the photoelectric effect to convert light signal into electronic signal, and then amplify the electronic signal through the electron multiplication mechanism, and finally output the electrical signal.

There is a close relationship between the micromorphology of barium tungsten electrode and its performance. The micromorphology mainly includes characteristics such as grain size, porosity, surface roughness, etc. These characteristics directly affect the working performance of the electrode under high temperature and high current density environment.

Barium tungsten electrode (W-Ba electrode) is often used in discharge lamps, vacuum tubes and other devices in high temperature environment due to its excellent high temperature oxidation resistance. Its high temperature oxidation resistance mechanism is mainly closely related to the chemical properties of barium and its role in the tungsten matrix.