1. Extremely High Melting Point:
l With a melting point of 3422°C, tungsten crucibles are uniquely adept at maintaining structural integrity under extreme thermal stress. This property allows the crucibles to be used effectively in environments where temperatures exceed 2000°C and can be pushed up to 3000°C.
2. High Density and Low Vapor Pressure:
l Tungsten boasts a high density of 19.25 g/cm³. Coupled with its low vapor pressure at high temperatures, tungsten ensures that it does not easily vaporize or contaminate the substances being heated. This characteristic keeps the operational environment clean and minimizes the risk of undesired reactions and variability in material properties.
3. Excellent Corrosion Resistance:
l Tungsten crucibles exhibit remarkable resistance to corrosion from melting metals such as indium, steel, bismuth, and tin, as well as from both acidic and alkaline slags. This resilience contributes to a longer lifespan of the crucibles, reducing replacement costs and downtime.
4. Good High-Temperature Strength:
l Even at elevated temperatures, tungsten crucibles maintain high strength and hardness, resisting deformation or collapse. This mechanical stability is crucial in maintaining process parameters during critical high-temperature applications.
5. Superior Thermal Conductivity:
l Tungsten's ability to conduct heat allows for rapid and uniform heat transfer within the crucible. This property is essential in ensuring consistent melting and processing of materials while minimizing thermal gradients that could lead to defects or inconsistencies in the final product.
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