Although barium tungsten emitter hollow cathodes have many significant advantages, they also have some potential disadvantages and limitations:
Volatility of barium
Barium is a relatively volatile element, which means that during the operation of the cathode, especially under high temperature conditions, barium may evaporate from the cathode surface, resulting in a decrease in emission performance. In order to maintain stable emission performance, the active material may need to be replenished regularly, which increases the maintenance cost of the equipment.
Sensitivity to gas
Barium tungsten emitter hollow cathodes are very sensitive to gases in the working environment. If there are harmful gases (such as oxygen, water vapor, etc.) in the environment, they will react with the barium layer on the cathode surface, resulting in the consumption of barium and the decrease of emission performance. Therefore, the atmosphere and vacuum degree of the working environment need to be strictly controlled.
Fluctuation of emission performance
Although barium tungsten emitter hollow cathodes have good emission performance under stable working conditions, the emission performance may fluctuate when starting, shutting down or when the working conditions change. This may affect the performance and stability of the equipment.
Complex preparation process
Preparing high-performance barium tungsten emitter hollow cathodes requires a sophisticated preparation process and strict quality control. This includes selecting suitable raw materials, optimizing preparation process parameters, and ensuring the uniformity and consistency of the cathode. Therefore, the preparation cost may be high.
Limited life of the cathode
Although the barium tungsten emitter hollow cathode has a long service life, the barium layer on the cathode surface will gradually consume over time, resulting in a decrease in emission performance. Therefore, the life of the cathode is limited and needs to be replaced or repaired regularly.
Poor impact resistance
The impact resistance of the barium tungsten emitter hollow cathode is relatively poor and is easily damaged by mechanical vibration or impact. Therefore, special attention should be paid to the protection of the cathode during design and use.
It should be pointed out that these shortcomings are not universal, but vary according to factors such as the specific application environment and preparation process. Therefore, when selecting and using the barium tungsten emitter hollow cathode, it is necessary to evaluate and select according to specific needs and conditions.
More details of tungsten barium electrode or tungsten barium cathode, please visit website: http://tungsten.com.cn/barium-tungsten-cathode.html
Please contact CHINATUNGSTEN ONLINE for inquiry and order of tungsten needles:
Email: sales@chinatungsten.com
Tel.: +86 592 5129595
