Yttrium Foil

Yttrium Foil is a soft, silvery transition metal foil known for its high melting point (1,522 °C), moderate density, and resistance to oxidation at elevated temperatures when protected from moisture. Its light-blocking foil form is advantageous for applications requiring both physical shielding and precise thermal or optical control. In aerospace and high-temperature industries, yttrium is valued as an additive in superalloys, improving creep resistance and stability under thermal cycling. In electronics, yttrium foil serves as a base for depositing yttrium oxide (Y₂O₃), which offers high dielectric strength and optical transparency from the UV to IR range, making it critical for protective coatings and high-performance optics. Its versatility extends to superconductors, laser crystals, and ceramic stabilizers, where foil serves as a high-purity feedstock for vapor deposition. The combination of thermal resilience, reactivity in alloying, and broad cross-sector utility underscores yttrium foil’s importance in advancing both industrial manufacturing and medical technology.

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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	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