Màquina de recobriment al buit PVD

El filferro de tungstè és un material indispensable a la màquina de recobriment al buit. Parlem de l'ús d'aquest material i de les precaucions d'ús.

Aplicació de filferro de tungstè a la màquina de recobriment al buit:

Except for a small amount of tungsten wire used as a heating material for high-temperature furnaces, heaters of electronic tubes and reinforcing ribs of composite materials,most of the tungsten wires are used to make filaments of various white tungsten incandescent lamps and tungsten halogen lamps and gas discharge lamps. electrode. For the tungsten wire or tungsten rod used as the cathode ofthe gas discharge lamp, in order to reduce its electron work function, 0.5-3 percent thorium must be added, which is called tungsten-thorium wire. Since thorium is a radioactive element that pollutes the environment, cerium is usedinstead of thorium to make tungsten-cerium wire or tungsten-cerium rod. But the evaporation rate of cerium is high, so tungsten cerium wire or tungsten cerium rod can only be used for low-power gas discharge lamps.

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