Barium tungsten electrode is a special electrode material widely used in electronic tubes, gas discharge lamps and other equipment. Its physical properties are the key to its performance and application. The following are the main physical properties of barium tungsten electrode:
1. Electron Emission Performance
Barium tungsten electrode has excellent electron emission performance, especially under high temperature conditions, it can emit electrons stably. This makes it particularly suitable for use as a thermionic emission cathode that requires high current density.
2. Melting Point
The melting point of barium tungsten electrode is very high, usually exceeding 3000°C. This feature ensures that it is not easy to melt or deform in a high temperature working environment, maintaining the stability of the structure.
3. Thermal Stability And Thermal Conductivity
Barium tungsten electrode exhibits good thermal stability at high temperatures and has high thermal conductivity. This helps the electrode to quickly dissipate heat, avoid damage due to overheating, and maintain temperature stability.
4. Resistivity
The low resistivity of barium tungsten electrode is conducive to efficient conduction of current, thereby improving the working efficiency of the electrode.
5. Mechanical Strength
Barium tungsten electrodes have high mechanical strength and can withstand certain physical shocks and vibrations, ensuring their durability in harsh environments.
6. Density
The density of barium tungsten electrodes is relatively high, about 19.3 g/cm3, which enhances their structural stability and service life.
7. Chemical Stability
Under normal working conditions, barium tungsten electrodes have a certain resistance to oxidation, corrosion, and gases and moisture in the environment, thereby extending their service life.
