Title :
Vacuum discharge from perovskite oxide electrodes
Author :
Shkuratov, Sergei I.
Author_Institution :
Inst. of Electrophys., Acad. of Sci., Ekaterinburg, Russia
Abstract :
In the paper, the authors present results of investigations of electrical discharges in vacuum from perovskite-like La0.3Sr 0.7CoO3 and YBa2Cu3O6.95 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 discharge of metallic electrodes
Keywords :
barium compounds; cathodes; cobalt compounds; copper compounds; electric breakdown; high-temperature superconductors; insulation testing; lanthanum compounds; strontium compounds; vacuum arcs; vacuum breakdown; vacuum insulation; work function; yttrium compounds; La0.3Sr0.7CoO3; YBa2Cu3O6.95; cathode surfaces; ceramic cathode materials erosion; emission capability; field emission characteristics; insulation breakdown tests; local chemical composition; nanosecond high-current arc discharges; perovskite oxide electrodes; vacuum discharge; work function; Cathodes; Ceramics; Composite materials; Crystallization; Electrodes; Electron emission; Scanning electron microscopy; Superconducting materials; Surface cleaning; Surface discharges;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1996. Proceedings. ISDEIV., XVIIth International Symposium on
Conference_Location :
Berkeley, CA
Print_ISBN :
0-7803-2906-6
DOI :
10.1109/DEIV.1996.545456
