KoronaElektroden

KoronaElektroden are conductive elements designed to generate corona discharge when a high voltage is applied between the electrode and a nearby counter-electrode. They are typically implemented as sharp tips, fine wires, or needle-like structures to create strong local electric fields in the surrounding gas.

The corona effect arises when the electric field near the electrode tip exceeds the breakdown threshold of the medium, typically air. The voltage at which corona starts, the corona inception voltage (CIV), and the resulting current depend on the electrode geometry, tip radius, gap to the counter-electrode, and the applied voltage. Designs range from single-point needles to multi-point arrays or crossed wires, often mounted on insulating supports.

Common materials for KoronaElektroden include tungsten, stainless steel, and nickel-chromium alloys. Tips may be sharpened to micrometer radii to lower the CIV, with coatings or surface treatments used to control emission, durability, and corrosion resistance. Precision manufacturing and clean conditions are important to achieve stable corona performance and to minimize unintended arcing.

Applications of KoronaElektroden encompass electrostatic precipitators and air-cleaning devices, xerography and electrophotography equipment, and corona-based charging or ionization in coating and printing processes. They are typically paired with a counter-electrode and operated from a high-voltage supply, with design choices balancing efficiency, wear, and safety.

Safety considerations include the production of ozone and nitrogen oxides under certain operating conditions, as well as high-voltage hazards. Regular inspection for tip wear, contamination, and insulation integrity is recommended, along with appropriate maintenance to ensure stable performance.