Abstract
The life of impregnated Ba-W cathodes with a new construction have been evaluated using an accelerated life test at three different temperatures (1170°C,1130°C,1090°C) and constant current density (2A/cm2). According to the relationship of life with operating temperatures, an accelerated equation has been set up. The cathode life at normal operating temperature is deducted based on the accelerated equation. The results show that life of the novel cathode exceeds 190,000 hour at a current density of 2A/cm2.
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