Abstract
Electron emission into vacuum from a thin plate of lead-zirconate-titanate (PZT) ferroelectric ceramic has been observed under various applied pulse conditions. As positive pulse voltage of a couple of bipolar pulse trains increases, the emitted charge increases, but saturates over +150 V, and the absolute threshold voltage of negative pulse for the electron emission decreases. Hence this electron emission depends strongly on the external pulse voltage, and polarization change exerts an important effect on this phenomenon. Cathodoluminescence from phosphor excited by the emitted electrons has also been observed and may be useful in the application to an electron emitter in vacuum electronic devices.
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