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Tellurium ( Te )

Material Information

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Lump Powder Sputtering Target
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General Description:  

Tellurium was discovered in 1783 by Baron Franz Josef Müller von Reichenstein in Sibiu, Roumania.

Tellurium is a rare, silvery-white, semi-metallic element which exhibits both metallic and non-metallic traits and has an abundance of 0.005 ppm in the earth's crust. It exists in only one form, whereas the other members of the oxygen group of elements in the periodic table all exhibit at least two allotropic forms. It is generally found in combination with other elements, and can be isolated from the fine dusts of telluride gold ores. Tellurium will burn in air and oxygen, is unaffected by water or HCl, but is soluble in HNO3.

Tellurium has p-type semiconductor properties and, hence, is used in the electronics industry. The metal is used in the refining of zinc where it eliminates cobalt from the process. Other metallurgical applications include its use as an alloying element with, for example copper and stainless steel, the resulting alloys having improved machineability. Contact with either the pure metal or its compounds is to be avoided as they are not only toxic, but inhalation of the vapours leads to unpleasant body odours!

   

Atomic Properties

Atomic number 52
Atomic radius - Goldschmidt ( nm ) 0.143
Atomic weight ( amu ) 127.60
Crystal structure Hexagonal
Electronic structure Kr 4d1O 5s2 5p4
Ionization potential No. eV
1 9.01
2 18.6
3 28.0
4 37.4
5 58.8
6 70.7
Natural isotope distribution Mass No. %
120 0.1
122 2.5
123 0.9
124 4.6
125 7.0
126 18.7
128 31.7
130 34.5
Photo-electric work function ( eV ) 4.8
Thermal neutron absorption cross-section ( Barns ) 4.7
Valences shown 2, 4, 6

Electrical Properties

Electrical resistivity @0C ( µOhmcm ) 1.6x105

Mechanical Properties

Material condition Polycrystalline
Bulk modulus ( GPa ) 31.4
Hardness - Mohs 2.3
Poisson's ratio 0.16-0.3
Tensile modulus ( GPa ) 47.1

Physical Properties

Boiling point ( C ) 990
Density @20C ( g cm-3 ) 6.25
Melting point ( C ) 450

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 16.75
Latent heat of evaporation ( J g-1 ) 820
Latent heat of fusion ( J g-1 ) 138
Specific heat @25C ( J K-1 kg-1 ) 201
Thermal conductivity @0-100C ( W m-1 K-1 ) 3.3

Buy Tellurium on-line

We stock and supply the following standard forms:
Lump Powder Sputtering Target
Lump Powder Sputtering Target

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