Abstract
Measurements of the work function of nickel matrix cathodes yield values in the region of 1 eV. Schottky plots are found to agree with theory provided the cathode surface is polished. Deviations from the image law at low field strengths may be explained using patch theory with suitably chosen parameters. The results of surface field determinations indicate a very small degree of coverage of the nickel grains by alkaline earth metals or oxides.
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