
Tungsten heater is a typical tungsten product made of pure tungsten wire or doped tungsten wire through drawing, stranding, pressing molding and surface treatment (electropolishing or alkaline cleaning or cleaning). It has quite excellent thermal, mechanical and chemical properties, such as high melting point, low evaporation rate, small thermal expansion coefficient, impact resistance and corrosion resistance, etc., so it has a wide range of uses, such as used as evaporation source materials for vacuum evaporators. Evaporation is a kind of…