Barium tungsten alloy cathode material has the following advantages:
High electron emission capability
The barium tungsten alloy cathode can provide stable and high-density electron emission at relatively low temperatures. This is mainly due to the W-Ba-O electron emission system formed by the reaction of barium with tungsten on the cathode surface, which can effectively reduce the threshold temperature of electron emission and increase the emission current density.
Good stability
Due to the high melting point and stability of the tungsten matrix, the barium tungsten alloy cathode can operate stably for a long time in a high temperature environment. In addition, the addition of barium also helps to improve the heat resistance and oxidation resistance of the cathode.
Long life
The life of the barium tungsten alloy cathode is relatively long, which is mainly due to its stable electron emission performance and anti-aging ability. Under normal working conditions, the barium tungsten alloy cathode can maintain stable emission performance for a long time.
Low dissipation rate
Due to the porous structure of the tungsten matrix, the barium tungsten alloy cathode can effectively reduce the dissipation of active substances. This helps to maintain the concentration of active substances on the cathode surface, thereby ensuring the stable emission performance of the cathode.
Wide range of applications
Barium tungsten alloy cathode materials are widely used in various electric vacuum devices, such as cathode ray tubes (CRT), microwave tubes, traveling wave tubes, magnetrons, etc. In addition, it is also used in fields such as electrochemical analysis and solution electrolysis.
Good processing performance
Tungsten is an easy-to-process material, so the barium tungsten alloy cathode can be prepared into electrodes of different shapes and sizes through various processing techniques (such as powder metallurgy, extrusion, rolling, etc.) to meet the needs of different applications.
In summary, barium tungsten alloy cathode materials have been widely used in fields such as electric vacuum technology and electrochemical analysis due to their advantages such as high electron emission ability, good stability, long life, low escape rate, wide application range and good processing performance.
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