Thermionic constants of metals and semiconductors. II. Metals of the first transition group

The method described in part I for the determination of the thermionic constants of graphite, which is based on finding the saturation vapour pressure of the electron gas in a graphite chamber at different known temperatures, and applying the well-known thermodynamic relation of Clausius and Clapeyron, can be used for determining the constants of most metals by simply coating the inner walls of the graphite chamber with a thick layer of the metal to be studied. The present part reports measurements made by this method of the thermionic constants of the metals of the iron group from Ti to Ni