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Formula: Re
Form: Foil (Light Tight)
Material: Rhenium
CAS Number: 7440-15-5
Commodity: Metals
Purity:
99.99%
Temper:
Annealed
Light Tight:
Light Tight
Rhenium Foil Light Tight combines the exceptional thermal and mechanical properties of rhenium with a structure free of pinholes, ensuring complete light blockage. This form is particularly important in optical and high-vacuum systems where light leakage must be prevented. Industries such as aerospace, scientific instrumentation, and advanced manufacturing use light-tight rhenium foil for shielding in spectroscopic equipment, vacuum chambers, and optical devices. Specific applications include light-blocking barriers in electron microscopy, heat shields in high-temperature reactors, and precision optical masks. In research, it is employed in experiments requiring both high thermal resilience and complete light isolation. Its rare combination of optical sealing and refractory metal durability ensures a niche but critical role in advanced technology systems.
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 75 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Xe 4f¹⁴ 5d⁵ 6s² |
| Valences shown | -1,1,2,3,4,5,6,7 |
| Atomic weight( amu ) | 186.207 |
| Thermal neutron absorption cross-section( Barns ) | 85 |
| Photo-electric work function( eV ) | 5 |
| Natural isotope distribution( Mass No./% ) | 187/ 62.6 |
| Natural isotope distribution( Mass No./% ) | 185/ 37.4 |
| Atomic radius - Goldschmidt( nm ) | 0.138 |
| Ionisation potential( No./eV ) | 1/ 7.87 |
| Ionisation potential( No./eV ) | 2/ 16.6 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Soft |
| Material condition | Hard |
| Poisson's ratio | 0.26 |
| Poisson's ratio | 0.26 |
| Bulk modulus( GPa ) | 334 |
| Bulk modulus( GPa ) | 334 |
| Tensile modulus( GPa ) | 466 |
| Tensile modulus( GPa ) | 466 |
| Hardness - Vickers( kgf mm⁻² ) | 280 |
| Hardness - Vickers( kgf mm⁻² ) | 700 |
| Tensile strength( MPa ) | 2225 |
| Tensile strength( MPa ) | 1125 |
| Yield strength( MPa ) | 315 |
| Yield strength( MPa ) | 2150 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 18.7@20@20°C |
| Superconductivity critical temperature( K ) | 1.7 |
| Temperature coefficient( K⁻¹ ) | 0.0045@0-100°C |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 5627 |
| Density( gcm⁻³ ) | 21@20 |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 3180 |
| Latent heat of evaporation( J g⁻¹ ) | 3824 |
| Latent heat of fusion( J g⁻¹ ) | 179.9 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 138@25 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 48@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 6.6@0-100°C |
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