Tungsten crucible: A key container in high-temperature processes
Tungsten crucibles are high-performance containers made of tungsten metal. Due to their unique physical and chemical properties, they play a significant role in multiple high-tech and industrial fields. It has an extremely high melting point (3422°C), and is not prone to deformation or contamination of the melt at high temperatures, ensuring the purity and quality of the material. This characteristic enables it to be used in the semiconductor industry for growing single crystal materials such as gallium arsenide and sapphire, and in the photovoltaic industry for smelting polycrystalline silicon or single crystal silicon, providing crucial support for the manufacturing of leds, lasers, integrated circuits and solar cells. In addition, tungsten crucibles are widely used in the smelting and purification of rare earth metals, capable of resisting the chemical erosion of molten rare earth metals, and providing reliable equipment support for the production of materials such as permanent magnets and phosphors.
The advantages and application expansion of tungsten crucibles
Tungsten crucibles not only perform well in traditional industrial fields but also demonstrate unique advantages in high-tech fields. In chemical vapor deposition (CVD) and coating processes, it serves as an evaporation source or carrier for the preparation of hard coatings such as tungsten carbide and tungsten nitride. Its high-temperature stability prevents the contamination of coating components and ensures the high quality of the coating. In the nuclear industry and aerospace fields, tungsten crucibles, with their excellent radiation shielding performance and thermal shock resistance, are used to hold nuclear fuel or highly radioactive substances, as well as for high-temperature testing of rocket engine components, providing safety guarantees for these high-risk and high-demand fields. In addition, tungsten crucibles are widely used in laboratory research, serving as containers for ultra-high temperature experiments and the synthesis of new materials. Their high purity (up to over 99.95%) can reduce experimental interference, providing reliable tools for scientific research.
Key points for the selection and use of tungsten crucibles
The reason for choosing tungsten crucibles lies in their outstanding high-temperature resistance, which enables them to operate at temperatures above 2000°C in inert gas or vacuum environments. It also has a low coefficient of thermal expansion, can withstand sudden temperature changes, and demonstrates excellent thermal shock resistance. In addition, tungsten crucibles have excellent resistance to acids, alkalis and molten metals, are chemically inert, and their high density enables them to provide good radiation protection. However, when using tungsten crucibles, some precautions should also be taken. For instance, tungsten is prone to oxidation in high-temperature air, so it must be used under vacuum or under the protection of hydrogen or argon. In addition, the cost of tungsten crucibles is relatively high, mainly due to the scarcity of tungsten materials and the difficulty in processing them. However, because of their long service life, they are suitable for use in high-value-added cutting-edge technology fields. In conclusion, tungsten crucibles are indispensable key tools in high-temperature and high-purity processes, especially in the demanding cutting-edge technological fields where they hold an irreplaceable position.
Mosten Alloy can produce tungsten sheet, tungsten block, tungsten foil, tungsten rod, tungsten wire, tungsten processing workpiece according to customer demand.
