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Rhenium Foil (Light Tight)

Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Rhenium Form: Foil (Light Tight) Composition: Re CAS Number: 7440-15-5 Purity: 99.99% (4N) Temper: Annealed Opacity: 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.
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Material Properties

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°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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Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Rhenium Form: Foil (Light Tight) Composition: Re CAS Number: 7440-15-5 Purity: 99.99% (4N) Temper: Annealed Opacity: Light Tight

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Tolerances

Foil (Light Tight)
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%
Linear dimension <100mm ±1mm
Linear dimension >=100mm +2 / -1%