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Formula: Au
Form: Disk
Material: Gold
CAS Number: 7440-57-5
Commodity: Precious Metals
Gold disks are made from pure gold and available in a choice of 1238 diameters and thicknesses. Gold's high thermal and electrical conductivity make these disks ideal for applications in electronics and thermal management. Its corrosion resistance and biocompatibility also allow Gold disks to be used in medical devices and implants. With such a broad range of options available, our extensive range can meet the needs of diverse industries and their applications.
Tolerances
Disk
| 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 | 79 |
| Crystal structure | Face centred cubic |
| Electronic structure | Xe 4f¹⁴ 5d¹⁰ 6s¹ |
| Valences shown | 1,3 |
| Atomic weight( amu ) | 196.9665 |
| Thermal neutron absorption cross-section( Barns ) | 98.8 |
| Photo-electric work function( eV ) | 4.8 |
| Atomic radius - Goldschmidt( nm ) | 0.144 |
| Ionisation potential( No./eV ) | 1/ 9.22 |
| Ionisation potential( No./eV ) | 2/ 20.5 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Soft |
| Material condition | Hard |
| Poisson's ratio | 0.42 |
| Poisson's ratio | 0.42 |
| Bulk modulus( GPa ) | 171 |
| Bulk modulus( GPa ) | 171 |
| Tensile modulus( GPa ) | 78.5 |
| Tensile modulus( GPa ) | 78.5 |
| Hardness - Vickers( kgf mm⁻² ) | 20-30 |
| Hardness - Vickers( kgf mm⁻² ) | 60 |
| Tensile strength( MPa ) | 130 |
| Tensile strength( MPa ) | 220 |
| Yield strength( MPa ) | 205 |
| Yield strength( MPa ) | - |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 2.20@20@20°C |
| Temperature coefficient( K⁻¹ ) | 0.004@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | 0.74 |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 3080 |
| Density( gcm⁻³ ) | 19.3@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 1064.4 |
| Latent heat of evaporation( J g⁻¹ ) | 1738 |
| Latent heat of fusion( J g⁻¹ ) | 64.9 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 129@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 318@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 14.1@0-100°C |