Tantalum (Tantalum) is a metal element with an atomic number of 73, a
chemical symbol Ta, a melting point of 2996 °C, a boiling point of 5425 °C,
and a density of 16.6 g/cm³. The element corresponding to the element is
steel gray metal, which has extremely high corrosion resistance. It does not
react to hydrochloric acid, concentrated nitric acid and aqua regia no matter
under cold or hot conditions.
Tantalum mainly exists in tantalite and coexists with niobium. Tantalum is
moderately hard and ductile, and can be drawn into thin filaments to make
thin foils. Its coefficient of thermal expansion is small. Tantalum has very
good chemical properties and is extremely resistant to corrosion. It can be
used to make evaporation vessels, etc., and can also be used as electrodes,
rectifiers, and electrolytic capacitors of electron tubes. Medically, it is used to
make thin sheets or threads to repair damaged tissues. Although tantalum is
highly resistant to corrosion, its corrosion resistance is due to the formation
of a stable protective film of tantalum pentoxide (Ta2O5) on the surface.
Post time: Jan-06-2023