High melting point, corrosion resistance, good electrical conductivity.The pointed tungsten carbide needle is a specific type of electrode used in the ion source. It typically consists of a thin, pointed rod made from tungsten carbide material. Tungsten carbide is a very hard and durable material, making it suitable for ionization processes that involve high temperatures and corrosive environments.In the ion source, the pointed tungsten carbide needle is often used as the cathode or negative electrode. When a voltage is applied between the cathode and the anode (the positive electrode), the pointed tip of the tungsten carbide needle facilitates the ionization of gas molecules, creating negative ions. These ions can then be extracted and utilized for various purposes in different applications.