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.