fireelektrode

Fireelektrode (also written as fire electrode) is a term used in some technical contexts to denote an electrode designed to initiate or sustain combustion or high-temperature plasma via electric discharge. The term is not standardized and may vary by industry; in practice it may refer to a primary ignition electrode in gas burners, a tungsten or graphite electrode in plasma torches, or a flame-sensing electrode in combustion control systems.

Common materials for fireelektrodes include tungsten, molybdenum, graphite, copper alloys, and ceramic composites, chosen for high melting points, electrical conductivity, and erosion resistance. Electrode geometry is tailored to the application, with pointed tips promoting ionization in ignition systems and broader surfaces used in some arc devices. Protective coatings and insulating layers may extend life in harsh environments.

Applications span ignition of gas burners and internal combustion engines, ignition coils in electrical ignition systems, plasma cutting and welding torches, and certain flame-detection schemes that rely on ionization currents to verify flame presence. In ignition use, a voltage or current is applied between the fireelektrode and a counter-electrode to produce a spark or short arc that heats the fuel–air mixture. In flame sensing, a small ionization current flows when a flame is present, enabling safety and control mechanisms.

Durability and performance depend on factors such as current density, temperature, gas composition, electrode erosion, and the surrounding materials. Proper design, materials selection, and protective coatings are essential for longer service life in demanding environments.