Iridium Foil

Iridium Foil provides outstanding corrosion resistance, superior hardness, and remarkable thermal stability in a thin, flexible sheet suitable for precise applications. Its ability to endure aggressive environments and high temperatures makes it valuable in catalysis, aerospace, and microelectronics. Industries employ iridium foil for catalyst substrates, crucible liners in crystal growth, and thin electrodes for high-performance electrochemical systems. Specific technologies benefiting include thin-film fuel cell components, optical coatings, and microcircuit elements requiring robust chemical stability. Research applications include studying catalytic surface reactions, durability in electrochemical cycling, and the development of thermally stable coatings for next-generation energy devices. The foil format allows easy integration into layered structures, uniform surface coverage, and reproducibility across experiments and production systems. By merging flexibility with exceptional resilience, iridium foil has become indispensable in advancing high-performance scientific and industrial technologies.

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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 Precious Metals

Atomic Properties

Element	Value
Atomic number	77
Crystal structure	Face centred cubic
Electronic structure	Xe 4f¹⁴ 5d⁷ 6s²
Valences shown	3, 4
Atomic weight( amu )	192.22
Thermal neutron absorption cross-section( Barns )	425
Photo-electric work function( eV )	4.6
Natural isotope distribution( Mass No./% )	191/ 37.3
Natural isotope distribution( Mass No./% )	193/ 62.7
Atomic radius - Goldschmidt( nm )	0.135

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.26
Poisson's ratio	0.26
Bulk modulus( GPa )	371
Bulk modulus( GPa )	371
Tensile modulus( GPa )	528
Tensile modulus( GPa )	528
Hardness - Vickers( kgf mm⁻² )	650
Hardness - Vickers( kgf mm⁻² )	200-300
Tensile strength( MPa )	550-1100
Tensile strength( MPa )	1200

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	5.1@20@20°C
Superconductivity critical temperature( K )	0.11
Temperature coefficient( K⁻¹ )	0.0045@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.65

Physical Properties

Element	Value
Boiling point( C )	4130
Density( gcm⁻³ )	22.4@20°C

Thermal Properties

Element	Value
Melting point( C )	2410
Latent heat of evaporation( J g⁻¹ )	3186
Latent heat of fusion( J g⁻¹ )	135
Specific heat( J K⁻¹ kg⁻¹ )	133@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	147@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	6.8@0-100°C