Tantalum and Niobium Industry Annual Report 2019
2020-02-20 13:26:35 【Print】
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Tantalum is a tough, ductile metal with the symbol of Ta and Mohs hardness of 6.5. When exposed to air, tantalum forms a very dense oxide layer. Its melting point is 2,996°C, which is only lower than that of tungsten, rhenium and osmium. Tantalum with good ductility property can be drawn into thin foils. Tantalum has a low coefficient of thermal expansion and sees an expansion of only 6.6 ? 10-6 per degree. In addition, the tenacity of the metal is even superior to that of copper.
