The life of the tungsten-rhenium-based barium tungsten cathode is relatively long. Studies have shown that at a temperature of 1000°C, the current density of the tungsten-rhenium-based barium tungsten cathode remains above 3.0 A/cm2 during the first 18408 hours of life, and at 18408 hours, the emission current density is greater than 8% of the initial emission current density, which shows that the product has a long service life.
However, it should be noted that the life of the cathode will be affected by many factors, such as working conditions, ambient temperature, material purity, etc. Therefore, in practical applications, the life of the tungsten-rhenium-based barium tungsten cathode needs to be evaluated according to specific circumstances. In addition, the life and performance of the tungsten-rhenium-based barium tungsten cathode can be further improved by optimizing the preparation process, improving the material purity, and controlling the working environment.
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