Iridium Disk

Iridium Disk offers exceptional corrosion resistance, high hardness, and excellent thermal stability in a compact circular form designed for precision use. Its ability to withstand aggressive chemical and high-temperature environments makes it essential in aerospace, electrochemistry, and catalysis. Industries employ iridium disks in spark plug electrodes, electrochemical reference electrodes, and catalysts for ammonia oxidation. Specific technologies benefiting include hydrogen evolution reaction electrodes, high-performance fuel cells, and advanced optical sensor components. Research uses include studies on surface catalytic activity, electrochemical durability, and integration into high-temperature energy systems. The disk geometry ensures reproducibility in experimental setups and device integration, while iridium’s intrinsic robustness enables performance in extreme environments. Combining chemical inertness with functional versatility, iridium disks play a vital role in both industrial operations and fundamental research advancing electrochemistry, energy, and aerospace materials science.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

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

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