Tungsten Crucibles High Purity W High Temperature Resistant Metal For Semiconductor Alloy Nuclear And Vacuum Metallurgy Applications

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Semiconductor single crystal growth: During the pulling process of silicon single crystals, tungsten crucibles can withstand temperatures above and remain in contact with the molten silicon for a long time without undergoing chemical reactions. For III-V group semiconductor materials such as gallium arsenide and gallium nitride, which have higher melting points and stricter purity requirements, the growth temperature often needs to reach or above, and tungsten crucibles can provide a stable and highly pure melt environment. High-temperature alloys and functional material melting: Cobalt-based and nickel-based high-temperature alloys need to undergo vacuum arc melting or induction melting in a vacuum or inert atmosphere with a temperature as high as . Tungsten crucibles can maintain dimensional stability and mechanical integrity under these extreme conditions. Additionally, alloys containing rare precious metals such as tungsten, rhenium, platinum, and palladium, as well as the melting or sintering of functional ceramics such as silicon carbide, silicon nitride, and zirconia, also use tungsten crucibles. Nuclear industry and radioactive material processing: In the high-temperature melting and ingot casting processes of uranium and thorium metals, tungsten crucibles are used for the preparation of nuclear fuel blocks or targets due to their low neutron absorption cross-section and excellent radiation resistance. In the high-temperature treatment of radioactive waste, tungsten crucibles can operate in a high-temperature chemical environment for a long time, reducing the risk of secondary pollution. Vacuum metallurgy and electron beam melting: In electron beam melting equipment, tungsten crucibles are used to hold metal powders or metal blocks, and are melted and refined using an electron beam beam flow in a vacuum state. In vacuum heat treatment and hot isostatic pressing processes, tungsten crucibles are also often used as crucibles or inner sleeves to ensure dense microstructure under high-temperature and high-pressure conditions. Materials science research and high-temperature analysis: In high-temperature thermal analysis instruments, tungsten crucibles can be used for the measurement of samples above for studying material phase changes, thermal decomposition, and oxidation behaviors. In high-throughput melting and screening platforms established by research institutions, tungsten crucibles are also often used for the parallel synthesis of small-sized samples and snapshot performance testing.

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