Abstract
Field emission characteristics of a cathode consisting of SiC micropowders with sharp edges were examined. Emission current from the cathode followed the Fowler–Nordheim relationship; therefore, it was confirmed that the SiC micropowders acted as the field electron source. A field enhancement factor of ∼1000 was obtained. This value was comparable to that of conventional emitters. A good short-term stability of the fluctuation in the emission current from the cathode, which was less than 7% of the total emission current, was determined.
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