Yttrium Foil (Light Tight)

Yttrium Foil (Light Tight) is a high-purity metallic foil designed to block light transmission while retaining yttrium’s inherent thermal stability, corrosion resistance, and reactivity for advanced material synthesis. In this specialized form, it is ideal for applications where both shielding and high-purity yttrium feedstock are required, such as in controlled-atmosphere optical systems, vacuum deposition processes, and electronics manufacturing. Its role in producing yttrium oxide (Y₂O₃) thin films—renowned for their high refractive index, wide optical transparency range, and high dielectric strength—makes it valuable in optical coatings, semiconductor devices, and solid oxide fuel cells. The foil’s light-tight nature enhances precision in optical and electronic applications by eliminating photonic interference during fabrication or measurement. Combining functional shielding with the versatility of yttrium in electronics, energy, and healthcare, this material remains vital for precision engineering and high-technology research.

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Properties

Reference & Citations

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Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	39
Crystal structure	Hexagonal close packed
Electronic structure	Kr 4d¹ 5s²
Valences shown	3
Atomic weight( amu )	88.9059
Thermal neutron absorption cross-section( Barns )	1.3
Photo-electric work function( eV )	3.1
Atomic radius - Goldschmidt( nm )	0.181
Ionisation potential( No./eV )	1/ 6.38
Ionisation potential( No./eV )	Jun-93
Ionisation potential( No./eV )	3/ 20.5
Ionisation potential( No./eV )	2/ 12.2
Ionisation potential( No./eV )	May-77
Ionisation potential( No./eV )	4/ 61.8

Mechanical Properties

Element	Value
Hardness - Brinell	100-140
Hardness - Brinell	30-60
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.265
Poisson's ratio	0.265
Bulk modulus( GPa )	37.3
Bulk modulus( GPa )	37.3
Tensile modulus( GPa )	66.3
Tensile modulus( GPa )	66.3
Izod toughness( J m⁻¹ )	24
Tensile strength( MPa )	130
Tensile strength( MPa )	455
Yield strength( MPa )	375
Yield strength( MPa )	57

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	53@20@20
Electrical resistivity( µOhmcm )	53@20C
Temperature coefficient( K⁻¹ )	0.00271@0-100
Temperature coefficient( K⁻¹ )	0.00271@0-100C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.55

Physical Properties

Element	Value
Boiling point( C )	3338
Density( gcm⁻³ )	4.478@20
Density( gcm⁻³ )	4.478@20C

Thermal Properties

Element	Value
Melting point( C )	1522
Latent heat of evaporation( J g⁻¹ )	4135
Latent heat of fusion( J g⁻¹ )	193
Specific heat( J K⁻¹ kg⁻¹ )	285@25
Specific heat( J K⁻¹ kg⁻¹ )	285@25C
Thermal conductivity( W m⁻¹ K⁻¹ )	17.2@0-100
Thermal conductivity( W m⁻¹ K⁻¹ )	17.2@0-100C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	10.8@0-400
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	10.8@0-400C