The barium tungsten cathode requires high material purity. The cathode is an electron emission source, and the physical and chemical properties of its surface directly affect the electron emission performance. Here are some reasons why barium tungsten cathodes require high material purity:
Electron emission performance: The main function of the barium tungsten cathode is to generate electron beams. Impurities, contaminants, or defects may affect the electron emission performance of the cathode surface, reducing electron emission efficiency and stability.
Gas Adsorption: Gas adsorption on the cathode surface may affect the electron emission characteristics, especially when working in a vacuum environment. Pure materials can reduce gas adsorption and thus maintain stable electron emission.
Oxidation and chemical reactions: Impurities and contaminants may cause oxidation or other chemical reactions on the cathode surface, thereby altering electron emission performance. High purity materials can reduce the likelihood of these reactions.
Surface morphology: The morphology, roughness, and finish of the cathode surface can affect the uniformity and intensity of electron emission. High-purity materials generally produce more uniform and smooth surfaces.
Stability: Pure materials usually have better thermal stability and durability, and can maintain stable electron emission performance over a long period of time.
More details of barium tungsten electrode, please visit website: http://tungsten.com.cn/barium-tungsten-electrode.html
Please contact CHINATUNGSTEN for inquiry and order of barium tungsten electrodes:
Email: sales@chinatungsten.com
Tel.: +86 592 5129595
