Tungsten wire and rod are very important materials in electronic devices. It has excellent properties such as high melting point, low expansion coefficient, high strength, and high corrosion resistance, and can be used to manufacture electrodes, thermal resistors, and thermal emitters in electronic devices. In electronic devices, tungsten wires and rods are widely used in electronic tubes, semiconductor devices, and vacuum electronic devices. For example, in vacuum electronic devices operating at high temperatures, tungsten wires and rods can be used as electrodes or heaters because they can maintain stable electrical resistivity at high temperatures and are not oxidized or corroded.