What is tungsten crucible? Tungsten crucible is one of the products of tungsten, which is mainly divided into sintering, stamping, spinning, turning and welding of molybdenum rods. It is made of pure tungsten plates, tungsten sheets and pure tungsten rods through corresponding processes. It can be used in vacuum inert gas below 2600 degrees. Tungsten has high melting point and boiling point, good high temperature strength, wear resistance and corrosion resistance, high thermal conductivity, small thermal expansion coefficient, good hardenability. Tungsten crucible is widely used in rare earth smelting, quartz glass, electronic spraying, crystal growth and other industries.
Tungsten crucible is a vessel or melting pot made of extremely refractory materials (such as clay, graphite, porcelain clay, quartz or difficult to melt metal iron, etc.). Crucible is a ceramic bowl-shaped container with a deep bottom. When a solid is to be heated by a high fire, a crucible must be used. Because it can withstand high temperatures better than glassware. When using a crucible, the crucible cover is usually placed obliquely on the crucible to prevent the heated object from jumping out and allow air to freely enter and exit for possible oxidation reactions. Because the bottom of the crucible is very small, it is generally necessary to place it on a clay tripod to heat it directly with fire. The crucible can be placed upright or obliquely on the iron tripod, and can be placed by yourself according to the needs of the experiment. After the tungsten crucible is heated, it should not be placed on a cold metal table immediately to avoid it from breaking due to rapid cooling.
What are the manufacturing processes of tungsten crucibles?
At present, the tungsten crucibles on the market are mainly made of three processes: sintering, stamping, and spinning. Different processes will give tungsten crucibles different scopes of use. Tungsten crucibles are generally made of pure tungsten plates, tungsten sheets, and pure tungsten rods processed by corresponding processes.
Because tungsten has relatively high melting and boiling points, good strength, wear resistance, corrosion resistance, high thermal conductivity, and small thermal expansion coefficient, you must be extra careful about the manufacturing process of tungsten crucibles when using them to avoid unnecessary losses.