HIGHLY ORDERED STRUCTURE PYROLITIC GRAPHITE OR CARBON-CARBONCOMPOSITE CATHODES FOR PLASMA GENERATION IN CARBON CONTAINING GASES

摘要

A DC plasma torch which includes a long lasting thermionic cathode and ha s a high thermal efficiency. The DC plasma torch employs a solid cathode mad e of graphite with highly ordered structure such as Pyrolitic Graphite or Ca rbon-Carbon composites. Furthermore, carbon containing gases will be used as plasma gas. The cathode will allow for theoretically an unlimited lifetime of the cathode.