Tungsten crucibles is one of the metal tungsten products, mainly divided into sintering molding (applied to powder metallurgy technology), stamping, spinning type. The use of tungsten rods processing and forming (generally smaller size), welding a variety of molding, the use of pure tungsten plate, tungsten and pure tungsten rod by the corresponding process from processing. The tungsten crucible may be used in a vacuum inert gas below 2600 degrees. Tungsten melting point high boiling point, high temperature strength, anti-wear and corrosion resistance, thermal conductivity, thermal expansion coefficient is small, good hardenability. Tungsten crucible is widely used in rare earth smelting, quartz glass, electronic spraying, crystal growth and other industries
Production Process of Tungsten crucibles
Tungsten powder - sieving - batch - isostatic pressing - rough blank processing - intermediate frequency sintering - boutique car processing - packaging.
use of Tungsten crucibles
As the melting point of tungsten up to 3410 ℃, so the tungsten crucible is widely used in sapphire single crystal growth furnace, quartz glass melting furnace, rare earth smelting furnace and other industrial furnace core container, the use of the working temperature environment is generally above 2000 ℃. Especially for the sapphire single crystal growth furnace, with high purity, high density, no internal cracks, the size of precision, inside and outside the wall smooth, and other characteristics of the tungsten crucible on the sapphire crystal growth process of seed crystal success rate, pull crystal quality control, Desalination pot and service life played a key role.