Abstract
The properties of electron emission from a poled lead lanthanum zirconate titanate (PLZT) ferroelectric cathode have been investigated on the dependence of operating parameters such as the driving voltage, the vacuum pressure, the diode gap distance, and the diode acceleration voltage. The threshold electric field for electron emission from the cathode is about 6 kV/cm and the emitted current increase with increase in the driving voltage. A maximum current of 37 A/cm2 has been detected when the driving voltage is -1.4 kV and the gap distance is 20 mm. The electron emission is considered to be initiated by field emission and then possibly be enhanced by the surface plasma. To confirm the detailed emission process, however, further experimental study should be necessitated.
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