Beryllium Foil (Light Tight)

Beryllium Foil (Light Tight) combines the lightweight strength and thermal conductivity of standard beryllium foil with a fully pinhole-free structure, ensuring complete blockage of external light transmission. This unique property makes it indispensable in applications where optical isolation is critical alongside mechanical stability and radiation transparency. Industries such as aerospace, synchrotron research, and nuclear technology use light-tight beryllium foil for precision beamline windows, radiation shields, and optical system barriers. Specific technologies benefiting include high-vacuum X-ray analysis chambers, space-based detectors requiring strict light control, and thermal shielding systems in satellite optics. In research, this material enables experiments where stray light must be eliminated without compromising structural integrity or X-ray transmission efficiency. The combination of optical shielding, mechanical strength, and unique radiative properties makes Beryllium Foil (Light Tight) a highly specialized and valuable material in cutting-edge industrial and scientific environments.

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Properties

Reference & Citations

Acute toxicity

Serious health hazard

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Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	4
Crystal structure	Hexagonal close packed
Electronic structure	He 2s²
Valences shown	2
Atomic weight( amu )	9.01218
Thermal neutron absorption cross-section( Barns )	0.0092
Photo-electric work function( eV )	3.4
Atomic radius - Goldschmidt( nm )	0.113
Ionisation potential( No./eV )	2/ 18.2
Ionisation potential( No./eV )	1/ 9.32
Ionisation potential( No./eV )	4/ 218
Ionisation potential( No./eV )	3/ 154

Mechanical Properties

Element	Value
Material condition	Hard
Material condition	Soft
Poisson's ratio	0.02
Poisson's ratio	0.02
Bulk modulus( GPa )	110
Bulk modulus( GPa )	110
Tensile modulus( GPa )	318
Tensile modulus( GPa )	318
Hardness - Vickers( kgf mm⁻² )	150
Hardness - Vickers( kgf mm⁻² )	200
Tensile strength( MPa )	550
Tensile strength( MPa )	310
Yield strength( MPa )	345
Yield strength( MPa )	240

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	3.3@20@20°C
Superconductivity critical temperature( K )	0.026
Temperature coefficient( K⁻¹ )	0.009@0-100°C

Physical Properties

Element	Value
Boiling point( C )	2470
Density( gcm⁻³ )	1.848@20°C

Thermal Properties

Element	Value
Melting point( C )	1278
Latent heat of evaporation( J g⁻¹ )	32470
Latent heat of fusion( J g⁻¹ )	1350
Specific heat( J K⁻¹ kg⁻¹ )	1825@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	201@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	12@0-100°C