The tungsten copper-based barium tungsten cathode is a special cathode material, which is mainly composed of tungsten (W) and copper (Cu) as the matrix, and contains active materials of barium (Ba) and tungsten (W). This cathode material combines the high melting point, high hardness and high electron emission performance of tungsten, and the good thermal conductivity and electrical conductivity of copper, so that the tungsten copper-based barium tungsten cathode has excellent stability and long life in harsh environments such as high temperature and high voltage.
The working principle of the tungsten copper-based barium tungsten cathode is to evaporate the barium in the active material by heating, and form a layer of barium tungsten compound on the cathode surface, thereby providing stable electron emission. This cathode material is widely used in various vacuum electronic devices, such as traveling wave tubes, magnetrons, klystrons, etc., to provide the required electron beam for these devices.
Compared with traditional barium tungsten cathodes, tungsten copper-based barium tungsten cathodes have higher emission current density, longer service life and better stability. In addition, due to the addition of copper, the tungsten copper-based barium tungsten cathode also has good thermal conductivity and electrical conductivity, which helps to reduce the operating temperature of the cathode and improve the reliability of the device.
However, the preparation process of tungsten copper-based barium tungsten cathode is relatively complicated, requiring precise control of the material composition and preparation conditions to ensure stable and reliable performance of the cathode. At the same time, care must be taken to prevent the cathode from being affected by adverse factors such as overheating or mechanical damage during use.
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