EMITTER WIRE WITH LAYERED CROSS-SECTION

摘要

By selecting different materials for each layer, a multi - layered electrode structure, (300, 500) can be made with superior performance characteristics. For example, a multilayered electrode (300, 500) can include a high tensile strength tungsten core (302, 502), a conductive intermediate palladium, palladium-nickel, or other platinum group metal layer (304, 504) for generating a corona discharge, and a hardened layer (306, 506, 508, 510) comprising rhodium or other platinum group metal or alloy of the same to resist frictional abrasion during removal of silica dendrites that accumulate on the electrode surface during operation.