Barium tungsten cathodes are used in signal lights, specifically in electron tubes and cathode-ray tubes (CRTs), for several reasons:
High Electron Emission Efficiency: These cathodes have a high electron emission efficiency, which means they can efficiently emit electrons when heated. This property is essential for electron tubes, where the cathode's ability to emit electrons determines the device's performance.
Stability: BaW cathodes provide stable and consistent electron emission over time. This stability is crucial for these lights, where a reliable and constant light source is needed.
Longevity: These cathodes have a relatively long lifespan, ensuring that this kind of lights can operate for an extended period without frequent replacement or maintenance.
Low Work Function: BaW cathodes have a low work function, which is the amount of energy required to release electrons. A low work function means that they can emit electrons at lower temperatures, making them energy-efficient.
Temperature Tolerance: These lights may operate in various environmental conditions, including extreme temperatures. BaW cathodes can withstand a wide temperature range, ensuring they remain operational in harsh conditions.
Brightness: The high electron emission efficiency of BaW cathodes allows for the production of bright and visible signals, making them suitable for use in these lights where visibility is critical.
The combination of efficient electron emission, stability, longevity, and temperature tolerance makes barium tungsten cathodes well-suited for use in signal lights and other electron tube-based devices.
Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten electrodes/cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.
