THERMALLY STIMULATED ELECTRON-EMISSION FROM THE K-BI-GRAPHITE INTERCALATION COMPOUND

Preliminary investigations of the thermostimulated electron emission (TSEE) from intercalate type K1.1BiC7.36, in the 300-600 K temperature range, were performed. The total and partial pressure in the apparatus during heating and cooling of the sample were also recorded. A maximum in the electron emission at a temperature of about 320 K, and a drastic rise in the electron emission, which was accompanied by a rise in the total ambient pressure at 570 K, were observed. The increase of partial pressures of H2O, CO (N2), and CO2 contribute to the total pressure as measured at 570 K by means of the unipole mass spectrometer (UFM). The activation energy, using the method of numerical curve fitting, was calculated to be E = 0.72 eV for the 320 K peak.