Title :
Increased hold-off voltage in vacuum gaps with coated electrodes
Author :
Allen, R.J. ; Schoenbach, K.H.
Author_Institution :
Old Dominion Univ., Norfolk, VA, USA
Abstract :
It has been shown that thin film coatings applied to metal electrodes in vacuum increase the breakdown voltage. With a 2 μm SiO coating on a stainless steel cathode doubling of the DC breakdown voltage compared to that of a bare electrode was achieved. The electric field at breakdown with a coated electrode reached an average value of 650 kV/cm. A figure of merit for coating materials was developed which predicts further increase in the hold-off voltage by using coating materials with high dielectric constant and low electron affinity
Keywords :
electrodes; electron affinity; electron field emission; permittivity; spark gaps; vacuum breakdown; 2 micron; DC breakdown voltage; SiO; average value; coated electrodes; coating materials; dielectric constant; electric field; electron affinity; hold-off voltage; vacuum gaps; Cathodes; Coatings; Dielectric materials; Electric breakdown; Electrodes; High-K gate dielectrics; Steel; Transistors; Vacuum breakdown; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564554
