PtRh10 Alloy: Superior Heat Resistance for Laboratory Equipment
The material PtRh10 (in the literature also Pt10Rh, Pt90Rh10 or PtRh90/10) is used for highly stressed laboratory equipment, such as crucibles for melt digestion of minerals and ferroalloys as well as for crucibles, casts and stirrers in viscometry also in the fine grain stabilized state. Furthermore, the material is used for thermocouples (pairing PtRh10/Pt up to 1500°C), electrodes, glass fiber nozzles and lining materials for glass melting tanks as well as for catalyst grids. The mechanical, thermal and corrosive resistance increases with increasing rhodium content. An advantage of the platinum-rhodium alloy is that even in an oxidizing atmosphere only a minimum of weight loss occurs. The material is ductile, corrosion-resistant, oxidation-resistant and high temperature resistant. It is machinable, roll-cladable and conditionally deductible from the gas phase.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 20 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 208 GPa | |
Elongation | 20.0 °C | 2 % | |
Hardness, Vickers | 20.0 °C | 204 [-] | |
Poisson's ratio | 23.0 °C | 0.39 [-] | Typical for Platinum |
Shear modulus | 20.0 °C | 72 GPa | |
Tensile strength | 20.0 °C | 660 MPa | |
Yield strength Rp0.2 | 20.0 °C | 670 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 300.0 °C | 1.02E-5 1/K | |
700.0 °C | 1.07E-5 1/K | ||
1200.0 °C | 1.12E-5 1/K | ||
Melting point | 1769 °C | Typical for Platinum | |
Specific heat capacity | 23.0 °C | 136 J/(kg·K) | Typical for Platinum |
Thermal conductivity | 20.0 °C | 30 W/(m·K) | |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20.0 °C | 2.06E-7 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Platinum | 90 % |
Rhodium | 10 % |
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