Tungsten heater is a product made of tungsten wire or doped tungsten wire after fine processing. It is a typical tungsten product with tungsten powder as the main raw material and potassium, aluminum, silicon and other chemical elements as additives after vertical melting, sintering and deep processing. The English name is tungsten heater, and the purity is as high as 99.95%. It has a high melting point and high corrosion resistance. It is mainly used for vacuum gold plating, aluminum and other decorative items, chrome plating and other mirrors, and heating elements for plastic products. Tungsten heaters are twisted into single strands or multiple strands according to the specific requirements of samples or drawings. The diameter of tungsten wire ranges from 0.2 to 1.2mm.
In vacuum evaporation machines, tungsten heaters are mainly used as heating resistors. When heating, low voltage (less than 10V) and high current (several hundred A) heating methods are usually used. They are generally installed on racks that can be plugged in or hung. The plating materials include aluminum, iron, copper, nickel, chromium, etc., which are generally hung on tungsten heaters. The plated parts are generally hung on a hanger that is either stationary or rotating or can both rotate and revolve.
Tungsten heaters have the characteristics of high melting point and good conductivity. When the vacuum coating machine is powered on, they will heat up, which will cause the plating material with a lower melting point to evaporate or sublimate, gasify into particles with a certain amount of energy, and finally be rapidly transmitted to the workpiece to form a coating.
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