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Formula: Hf
Form: Powder
Material: Hafnium
CAS Number: 7440-58-6
Commodity: Metals
Purity:
95%
Max Particle Size:
45μm
Hazard Pictogram:
GHS02
Hafnium Powder is a form of elemental hafnium in powder form. It’s available in 9 variations, with particle sizes ranging from 1 to 45 microns. Hafnium is a lustrous, silvery-gray transition metal that is corrosion resistant and chemically similar to zirconium. Hafnium powder is used in filaments, electrodes, semiconductor fabrication, and as a neutron absorber in nuclear control rods due to its high neutron absorption cross-section. With its refractory properties, Hafnium Powder is also used in superalloys for aerospace applications.
Flammable
Tolerances
Powder
| Mean Particle Size | Nominal | |
|---|---|---|
| Minimum Particle Size | Nominal | |
| Maximum Particle Size | Nominal | |
| Maximum Particle Size | Nominal | |
| Particle Size D10 | Nominal | |
| Particle Size D50 | Nominal | |
| Particle Size D90 | 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 |
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