Physical And Chemical Properties Of Tantalum

Tantalum (Tantalum) chemical symbol is "Ta", atomic number is 73, atomic weight is 180.9479, belongs to the periodic system, class V, sub-group (vanadium) elements. It is a silver-white metal with a major valence of +5 and good corrosion resistance. In 200 ℃ below, only with fluorine, hydrofluoric acid, strong alkali solution, fuming sulfuric acid action. At room temperature, it is not affected by hydrochloric acid, nitric acid and sulfuric acid, does not act with aqua regia, and has great stability to acid.

Tantalum is malleable, can be drawn into a fine wire type thin foil. Its coefficient of thermal expansion is very small, every 1 ℃ only 0.00066% expansion. In addition, its toughness is very strong and superior to that of copper.
Tantalum plays an important role in surgery and medicine, not only for the manufacture of medical devices, but also as an excellent "bio-adaptive material". For example, Tantalum sheets can be used to compensate for damage to the skull, Tantalum wire can be used to suture nerves and tendons, Tantalum strips can be used to replace broken bones and joints, and Tantalum yarn or mesh made from Tantalum wire can be used to compensate for muscle tissue.