Title :
Vacuum discharge from perovskite oxide electrodes
Author :
Shkuratov, Sergei I.
Author_Institution :
Inst. of Electrophys., Acad. of Sci., Ekaterinburg, Russia
fDate :
8/1/1997 12:00:00 AM
Abstract :
This paper presents results of the investigation of electrical discharge in vacuum from perovskite-like La0.7Sr0.3CoO3 and YBa2Cu 3O6.95 electrodes. Data are given on the local chemical composition of cathode surfaces subjected to nanosecond high-current arc discharges and on the erosion of ceramic cathode materials. The results of measurements of the work function and of the emission capability of extended ceramic cathodes and of field emission characteristics of clean surfaces of perovskite-like oxides are presented. A comparative analysis has been carried out of the behavior of ceramic cathodes with results obtained from the discharge of metallic electrodes
Keywords :
barium compounds; electrodes; electron field emission; high-temperature superconductors; lanthanum compounds; strontium compounds; vacuum arcs; work function; yttrium compounds; La0.7Sr0.3CoO3; YBa2Cu3O6.95; cathode surfaces; electrical discharge; emission capability; erosion; extended ceramic cathodes; field emission characteristics; high-temperature superconductor; local chemical composition; metallic electrodes; nanosecond high-current arc discharges; perovskite oxide electrodes; vacuum discharge; Cathodes; Ceramics; Crystallization; Electrodes; Electron emission; Scanning electron microscopy; Strontium; Superconducting materials; Surface cleaning; Surface discharges;
Journal_Title :
Plasma Science, IEEE Transactions on
