Title :
Field emission current from high-Tc ceramic cathodes
Author :
Ziaja, Jan ; Zylka, Pawel
Author_Institution :
Inst. of Electrotech. & Electrotechnol. Fundamentals, Wroclaw Univ. of Technol., Poland
fDate :
8/1/1999 12:00:00 AM
Abstract :
In this work the result of emission phenomena investigations are presented. Experiments were conducted for high-Tc superconducting ceramics YBaCuO and BiPbSrCaCuO. Fowler-Nordheim characteristics and the current-temperature dependencies were observed for superconducting and non-superconducting cathodes. It was noticed that the emission current value abruptly changed in the vicinity of the critical temperature. All measurements were done in a vacuum chamber at 10-6 Pa. X-ray diffraction analysis and scanning electron microscopy examination of the ceramic electrodes were also performed
Keywords :
X-ray diffraction; barium compounds; bismuth compounds; calcium compounds; cathodes; electron field emission; high-temperature superconductors; lead compounds; scanning electron microscopy; strontium compounds; superconducting devices; yttrium compounds; 1E-6 Pa; BiPbSrCaCuO; Fowler-Nordheim characteristics; X-ray diffraction analysis; YBaCuO; critical temperature; current-temperature dependencies; field emission current; high-Tc ceramic cathodes; scanning electron microscopy; superconducting cathodes; vacuum chamber; Cathodes; Ceramics; Current measurement; Electrodes; Plasma temperature; Superconducting cables; Superconducting materials; Ultrasonic variables measurement; Voltage; Yttrium barium copper oxide;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
