Tungsten has high melting point and boiling point, high temperature strength, anti-friction and corrosion resistance, high thermal conductivity, small thermal expansion coefficient and good hardenability.
Tungsten crucible is widely used in rare earth smelting, quartz glass, electronic spraying, crystal growth and other industries.
Physical and chemical properties :
1. Purity :W 99.95%.
2. Density: 18.5g/cm.
3.Maximum operating temperature environment :2400℃.
Tungsten powder -- sieving -- batch -- isostatic pressing -- rough car processing -- intermediate frequency sintering -- fine car processing -- packaging
Due to the melting point of 3410 ℃, so the tungsten crucible is widely used in sapphire crystal growth furnace quartz glass melting furnace, rare earth smelting furnace ,and other industrial furnace core container, its use working temperature commonly above 2000℃ ,
Especially for sapphire single crystal growth furnace, tungsten crucible with high purity, high density, no internal crack size, precise inner and outer wall polishing and other characteristics which plays a key role in the success rate of seed crystal drawing, quality control of decrystallization and service life of sapphire crystal growth process.