Ammonium metatungstate (AMT) is a tungsten compound widely used in catalysis, electronics, ceramics, and other fields. Its production processes vary, each with unique advantages and suitable applications.

Xenon lamp (xenon flash lamp) is a light source based on the principle of high-voltage gas discharge. The performance of its electrode material directly affects the luminous efficiency, starting speed and service life of the lamp tube. Barium tungsten electrode has become a widely used electrode material in xenon lamps due to its unique physical and chemical properties.

Mercury lamps, a type of high-intensity discharge (HID) lamp, produce ultraviolet or visible light through arc discharge in mercury vapor. They are widely used in street lighting, industrial illumination, and ultraviolet applications such as sterilization and curing. The electrode is a critical component of mercury lamps, and barium tungsten electrodes are commonly employed due to their superior performance in enabling efficient discharge and extending lamp lifespan.

Barium tungsten electrode is an important innovation of cathode material in X-ray tube, which is composed of tungsten matrix and barium compound. Tungsten provides a high melting point of 3422°C and excellent corrosion resistance, while the addition of barium reduces the work function to 1.6 eV (pure tungsten is 4.5 eV), making electrons easier to emit, and the current density reaches 10 A/cm², which significantly improves the efficiency of thermal electron emission.