Cathode arrangement for an X-ray accelerating tube comprises a ferroelectric emitter which can emit electrons from an emitting surface and an electrode arranged on the emitting surface of the ferroelectric emitter

摘要

Cathode arrangement (1) comprises a ferroelectric emitter (3) which can emit electrons from an emitting surface; and an electrode (6, 15) arranged on the emitting surface of the ferroelectric emitter. The ferrroelectric material has a Curie temperature which lies above the operating temperature of the cathode arrangement. An Independent claim is also included for a process for the emission of electrodes from the X-ray device. Preferred Features; The ferroelectric material is Pb(Mg, Nb)O3, (Ba, Sr)TiO3, (Pb, La)(Zr, Ti)O3 or zinc oxide.