Study on Solid by-Products of Metal-Electrodes/SF6 Reactions under Power

摘要

By virtue of its high dielectric strength and good arc suppressing ability, SF₆has become widely used in circuit breakers and a variety of gas-insulated equipment in power engineering. Although SF₆is ”chemically” inactive, it undergoes decomposition and reactions with metallic and nonmetallic materials under drastic conditions of high currents, electric fields, and temperatures, etc., that may obtain in power arc. Under these conditions, SF₆reacts with metal electrodes to yield gaseous and solid reaction products ^{1. A number of attempts have been made to study the characteristics of the gaseous by-products but only few scholars has studied the characteristics of solid by-products.}