Erbium Foil

Erbium Foil is a thin, flexible sheet of the rare-earth metal erbium, offering unique optical emission characteristics, excellent corrosion resistance in air, and stability at elevated temperatures. The foil form provides a large, uniform surface area ideal for optical component fabrication, thin-film deposition, and integration into photonic devices. Its high-purity metallic composition ensures efficient light interaction, making it essential in applications such as gain media for solid-state lasers, thin-film optical amplifiers, and research into integrated photonic circuits. In the telecommunications industry, erbium’s characteristic 1.54 μm emission aligns with the low-loss window of silica optical fibers, enabling its use in erbium-doped amplifiers. Additionally, the foil geometry facilitates controlled evaporation in vacuum coating systems for optical coatings and surface modification experiments. In scientific and industrial contexts, Erbium Foil serves as a vital material for advancing optical communication technologies, laser engineering, and thin-film research.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%
Thickness	>0.05mm	±10%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	68
Crystal structure	Hexagonal close packed
Electronic structure	Xe 4f¹² 6s²
Valences shown	3
Atomic weight( amu )	167.26
Thermal neutron absorption cross-section( Barns )	160
Natural isotope distribution( Mass No./% )	166/ 33.4
Natural isotope distribution( Mass No./% )	162/ 0.1
Natural isotope distribution( Mass No./% )	168/ 27.0
Natural isotope distribution( Mass No./% )	170/ 15.0
Natural isotope distribution( Mass No./% )	167/ 22.9
Natural isotope distribution( Mass No./% )	164/ 1.6
Atomic radius - Goldschmidt( nm )	0.175
Ionisation potential( No./eV )	2/ 11.93
Ionisation potential( No./eV )	1/ 6.10

Mechanical Properties

Element	Value
Material condition	Polycrystalline
Poisson's ratio	0.207
Bulk modulus( GPa )	41.8
Tensile modulus( GPa )	73.3
Hardness - Vickers( kgf mm⁻² )	70
Tensile strength( MPa )	292
Yield strength( MPa )	292

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	86@20@20°C
Temperature coefficient( K⁻¹ )	0.00201@0-100°C

Physical Properties

Element	Value
Boiling point( C )	2863
Density( gcm⁻³ )	9.051@20°C

Thermal Properties

Element	Value
Melting point( C )	1529
Latent heat of evaporation( J g⁻¹ )	1680
Latent heat of fusion( J g⁻¹ )	103
Specific heat( J K⁻¹ kg⁻¹ )	168@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	14.5@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	9.2@0-100°C