Rhodium Metal (Rh)-Sputtering Target

Characteristic

Rhodium is a chemical element with the symbol Rh and atomic number 45. It is a rare, silvery-white, hard, corrosion-resistant, and chemically inert transition metal. 

Phase at STP： solid

Melting point： 2237 K (1964 °C, 3567 °F)

Boiling point： 3968 K (3695 °C, 6683 °F)

Density (near r.t.)： 12.41 g/cm³

when liquid (at m.p.)： 10.7 g/cm³

Heat of fusion： 26.59 kJ/mol

Heat of vaporization： 493 kJ/mol

Molar heat capacity： 24.98 J/(mol·K)

Application

Because rhodium metal is inert against corrosion and most aggressive chemicals, and because of its rarity, rhodium is usually alloyed with platinum or palladium and applied in high-temperature and corrosion-resistive coatings. White gold is often plated with a thin rhodium layer to improve its appearance while sterling silver is often rhodium-plated for tarnish resistance. Rhodium is sometimes used to cure silicones, a two part silicone where one part contains a silicon hydride and the other containing a vinyl terminated silicone are mixed.