Barium tungsten cathode is a common cathode material in xenon flash lamp that is a device that uses the discharge of xenon to generate intense light flashes. It is widely used in photographic flash lamps, laser systems, high-speed photography, medical equipment, xenon lasers and other fields.

Barium tungsten cathode is a cathode material used in electronic devices, and its applications are as following: 

Barium tungsten cathode is a composite material consisting of barium oxide and tungsten, providing a stable electron source or photoelectron source for electronic devices. 

Barium tungsten cathode, also called barium tungsten electrode, is a cathode material used in electronic devices, which is a composite material consisting of barium oxide (BaO) and tungsten (W). The cathode is an important part of an electronic device, it is where electrons are generated.