Abstract
A study of the influence of various gases on the emission of oxide-coated cathodes is described. Particularly selected were SO2 and NO2, which are closely related to air pollution, and Cl2 gases. For comparison purposes, the poisonous effects of N2, CO2, H2O, O2, CO, H2, and Ar, which are the main components of natural atmosphere, were also examined. To study the influences of gases on the emission of oxide-coated cathodes and on oxide materials in more detail, the poisoned state of the contaminated cathode was analyzed using secondary electron microscopy and Auger electron spectroscopy. The influence of contaminated gases on the emission of the cathode in the carbonate state prior to activation was also studied.
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