Tungsten crucibles

Density: not less than 3.18 g/cm3 

Quality Standard: According to the technical specifications and other regulations. 

The use of tungsten crucibles: 

Since the melting point of tungsten reaches 3380 ℃, tungsten crucibles are widely used in installations for growing single crystals of sapphire, in glass furnaces for melting quartz, as well as rare earth metals smelting. 

The temperature in the working zone of tungsten crucibles above 2000 ℃. To reduce the cost of cultivation of sapphire growth in plants is of great importance purity of the material, high density, lack of internal, hidden cracks and defects of tungsten crucible, the accuracy of its manufacturing and surface finish. In making tungsten crucibles we do not only control the quality of its surface chemical composition and density, but also the internal microstructure that avoids premature cracking of the crucible and increases its divergence.