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Rhenium ( Re )

Material Information

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Foil Lump Powder Rod Single Crystal Sputtering Target Wire
Foil Lump Powder Rod Single Crystal Sputtering Target Wire

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General Description:  

Rhenium was discovered in 1925 by W. Noddack, O. Berg and Ida Tacke in Berlin, Germany.

Rhenium was named after "Rhenus", the Latin name for the Rhine. It is a rare element (abundance 4 x 10 4 ppm in the earth's crust) and does not occur in quantity in any ore. It is found in ores which contain molybdenum from which it can be readily recovered. The metal is obtained by hydrogen reduction of the potassium perrhenate salt, obtained by precipitation of the perrhenate ion (ReO4) - from an oxidized solution.

Rhenium is a silvery colored metal which resists corrosion and oxidation but slowly tarnishes in moist air. It is soluble in nitric and sulfuric acids. Applications for the metal include its use as an alloying element with tungsten, the resulting alloy having a very high electrical resistance making it suitable for electrical filaments. Rhenium has a very high melting point and is used in high temperature thermocouples, electrical contacts and thermistors.

   

Atomic Properties

Atomic number 75
Atomic radius - Goldschmidt ( nm ) 0.138
Atomic weight ( amu ) 186.207
Crystal structure Hexagonal close packed
Electronic structure Xe 4f14 5d5 6s2
Ionization potential No. eV
1 7.87
2 16.6
Natural isotope distribution Mass No. %
185 37.4
187 62.6
Photo-electric work function ( eV ) 5.0
Thermal neutron absorption cross-section ( Barns ) 85
Valences shown -1, 1, 2, 3, 4, 5, 6, 7

Electrical Properties

Electrical resistivity @20C ( µOhmcm ) 18.7
Temperature coefficient @0-100C ( K-1 ) 0.0045
Superconductivity critical temperature ( K ) 1.70

Mechanical Properties

Material condition Soft Hard Polycrystalline
Bulk modulus ( GPa )     334
Hardness - Vickers 280 700
Poisson's ratio     0.26
Tensile modulus ( GPa )     466
Tensile strength ( MPa ) 1125 2225
Yield strength ( MPa ) 315 2150

Physical Properties

Boiling point ( C ) 5627
Density @20C ( g cm-3 ) 21.0
Melting point ( C ) 3180

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 6.6
Latent heat of evaporation ( J g-1 ) 3824
Latent heat of fusion ( J g-1 ) 179.9
Specific heat @25C ( J K-1 kg-1 ) 138
Thermal conductivity @0-100C ( W m-1 K-1 ) 48.0

Buy Rhenium on-line

We stock and supply the following standard forms:
Foil Lump Powder Rod Single Crystal Sputtering Target Wire
Foil Lump Powder Rod Single Crystal Sputtering Target Wire

Choose a form to search our on-line catalog  

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