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Beryllium ( Be )

Material Information

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Flake Foil Mesh Rod Sputtering Target Wire
Flake Foil Mesh Rod Sputtering Target Wire

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General Description:  

Discovered in 1797 by N.L. Vauquelin in Paris, but not extracted until 1828 by Wöhler (Berlin) and A.A.B. Bussy (Paris).

Beryllium is a light and lustrous metal which is obtained by the electrolysis of a fused halide (e.g. BeCl2). It is resistant to attack by air or water, even at elevated temperatures (red heat). Beryllium is non-magnetic, is a good thermal conductor and is used as an alloying addition to copper or nickel, the alloys having excellent thermal, mechanical and electrical properties; in addition, when alloyed with nickel, the resultant Be/Ni alloy has the highest coefficient for secondary electron emission (12.3). Applications for pure beryllium include its use as windows in X-ray tubes and as a source of neutrons when bombarded with alpha particles, a technique used by Chadwick in 1932 in their discovery. Beryllium and its compounds are highly toxic, inhalation of the dust resulting in berylliosis, an inflammation of the lungs.

   

Atomic Properties

Atomic number 4
Atomic radius - Goldschmidt ( nm ) 0.113
Atomic weight ( amu ) 9.01218
Crystal structure Hexagonal close packed
Electronic structure He 2s2
Ionisation potential No. eV
1 9.32
2 18.2
3 154
4 218
Natural isotope distribution Mass No. %
9 100
Photo-electric work function ( eV ) 3.4
Thermal neutron absorption cross-section ( Barns ) 0.0092
Valences shown 2

Electrical Properties

Electrical resistivity @20C ( µOhmcm ) 3.3
Temperature coefficient @0-100C ( K-1 ) 0.0090
Superconductivity critical temperature ( K ) 0.026

Mechanical Properties

Material condition Soft Hard Polycrystalline
Bulk modulus ( GPa )     110
Hardness - Vickers 150 200
Poisson's ratio     0.02
Tensile modulus ( GPa )     318
Tensile strength ( MPa ) 310 550
Yield strength ( MPa ) 240 345

Physical Properties

Boiling point ( C ) 2470
Density @20C ( g cm-3 ) 1.848
Melting point ( C ) 1278

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 12.0
Latent heat of evaporation ( J g-1 ) 32470
Latent heat of fusion ( J g-1 ) 1350
Specific heat @25C ( J K-1 kg-1 ) 1825
Thermal conductivity @0-100C ( W m-1 K-1 ) 201

Buy Beryllium on-line

We stock and supply the following standard forms:
Flake Foil Mesh Rod Sputtering Target Wire
Flake Foil Mesh Rod Sputtering Target Wire

Choose a form to search our on-line catalogue  

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