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Formula: Hf
Form: Pellets
Material: Hafnium
CAS Number: 7440-58-6
Commodity: Metals
Purity:
97%
Maximum Lump Size:
10mm
Hafnium pellets are part of Goodfellow's range of metals and alloys available in pellet form. Hafnium has a very high melting point of 2233°C and is resistant to concentrated alkalis. Its properties make hafnium suitable for applications such as control rods and shielding in nuclear reactors. The high neutron absorption cross section of hafnium allows it to control nuclear activity. Additionally, hafnium's hardness and strength at high temperatures are utilized in rocket engine nozzles and other high-temperature applications. With its unique properties, hafnium pellets from Goodfellow enable critical applications in nuclear and high-temperature technologies.
Tolerances
Pellets
| Maximum Lump Size | Nominal |
|---|
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 72 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Xe 4f¹⁴ 5d² 6s² |
| Valences shown | 4 |
| Atomic weight( amu ) | 178.49 |
| Thermal neutron absorption cross-section( Barns ) | 103 |
| Photo-electric work function( eV ) | 3.9 |
| Natural isotope distribution( Mass No./% ) | 179/ 13.8 |
| Natural isotope distribution( Mass No./% ) | 176/ 5.2 |
| Natural isotope distribution( Mass No./% ) | 180/ 35.2 |
| Natural isotope distribution( Mass No./% ) | 174/ 0.2 |
| Natural isotope distribution( Mass No./% ) | 177/ 18.5 |
| Natural isotope distribution( Mass No./% ) | 178/ 27.1 |
| Atomic radius - Goldschmidt( nm ) | 0.159 |
| Ionisation potential( No./eV ) | 3/ 23.3 |
| Ionisation potential( No./eV ) | 1/ 7.0 |
| Ionisation potential( No./eV ) | 2/ 14.9 |
| Ionisation potential( No./eV ) | 4/ 33.3 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Hard |
| Material condition | Soft |
| Poisson's ratio | 0.26 |
| Poisson's ratio | 0.26 |
| Bulk modulus( GPa ) | 109 |
| Bulk modulus( GPa ) | 109 |
| Tensile modulus( GPa ) | 141 |
| Tensile modulus( GPa ) | 141 |
| Hardness - Vickers( kgf mm⁻² ) | 150-180 |
| Tensile strength( MPa ) | 445 |
| Tensile strength( MPa ) | 745 |
| Yield strength( MPa ) | 365 |
| Yield strength( MPa ) | 240 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 32.2@20@20°C |
| Superconductivity critical temperature( K ) | 0.128 |
| Temperature coefficient( K⁻¹ ) | 0.0044@0-100°C |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 4602 |
| Density( gcm⁻³ ) | 13.1@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 2227 |
| Latent heat of evaporation( J g⁻¹ ) | 3700 |
| Latent heat of fusion( J g⁻¹ ) | 122 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 146@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 23@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 6@0-100°C |