Production Method[生产方法] | Cast |
Purity[纯度] | 99.5% |
Temper[状态] | As Rolled |
Thickness[厚度] | 0.75mm |
Typical Analysis(典型分析) |
Ag | 20 PPM |
Bi | 80 PPM |
Cu | 50 PPM |
Thermal Properties(热性能) |
Coefficient of thermal expansion ( x10⁻⁶ K⁻¹ ) | 29.000 @0-100℃ |
Latent heat of evaporation ( J g⁻¹ ) | 862 |
Latent heat of fusion ( J g⁻¹ ) | 23.20 |
Melting point ( C ) | 327.50 |
Specific heat ( J K⁻¹ kg⁻¹ ) | 159.0 @25℃ |
Thermal conductivity ( W m⁻¹ K⁻¹ ) | 35.30 @0-100℃ |
Atomic Properties(原子属性) |
Atomic number | 82 |
Atomic weight ( amu ) | 207.20000 |
Crystal structure | Face Centred Cubic |
Electronic structure | Xe4f¹⁴5d¹⁰6s²6p² |
Ionisation potential ( No./eV ) | 5 / 68.8 |
Ionisation potential ( No./eV ) | 3 / 31.9 |
Ionisation potential ( No./eV ) | 4 / 42.3 |
Ionisation potential ( No./eV ) | 2 / 15.03 |
Ionisation potential ( No./eV ) | 1 / 7.42 |
Natural isotope distribution ( Mass No./% ) | 207 / 22.1 |
Natural isotope distribution ( Mass No./% ) | 208 / 52.4 |
Natural isotope distribution ( Mass No./% ) | 206 / 24.1 |
Natural isotope distribution ( Mass No./% ) | 204 / 1.4 |
Photo-electric work function ( eV ) | 4.00 |
Thermal neutron absorption cross-section ( Barns ) | 0.1800 |
Valences shown | 2 , 4 |
Electrical Properties(电气特性) |
Electrical resistivity ( μOhmcm ) | 20.6@20℃ |
Superconductivity critical temperature ( K ) | 7.1960 |
Temperature coefficient ( K⁻¹ ) | 0.00420 @0-100℃ |
Thermal emf against Pt (cold 0C - hot 100C) ( mV ) | 0.44 |
Mechanical Properties(机械性能) |
Bulk modulus ( GPa ) ( Polycrystalline ) | 45.8 |
Bulk modulus ( GPa ) ( Sand cast ) | 45.8 |
Hardness - Mohs ( Sand cast ) | 1.50 |
Material condition | Polycrystalline |
Material condition | Sand Cast |
Poisson's ratio ( Polycrystalline ) | 0.440 |
Poisson's ratio ( Sand cast ) | 0.440 |
Tensile modulus ( GPa ) ( Polycrystalline ) | 16.10 |
Tensile modulus ( GPa ) ( Sand cast ) | 16.10 |
Tensile strength ( MPa ) ( Sand cast ) | 12.00 |
Yield strength ( MPa ) ( Sand cast ) | 5.5 |
Physical Properties(物理性质) |
Boiling point ( C ) | 1740 |
Density ( g cm⁻³ ) | 11.350 @20 |