Products Description
Precious metals are materials that are scarce in the environment, have low chemical reactivity, and high value. This group includes gold, silver, and platinum group metals (Pt, Ir, Os, Pd, Rh, Ru).
Platinum is a member of the platinum group metals and is lustrous, malleable and ductile; it has an abundance of approximately 0.001 ppm in the earth’s crust. Of the group of six metals (Pt, Pd, Os, Ir, Rh and Ru), it is the most important. It is unaffected by oxygen and water and is only soluble in aqua regia or fused alkalis.
The combination of good electrical properties with low reactivity makes precious metals excellent choices for demanding applications such as semiconductor bonding, accurate temperature measurement at elevated temperatures, and stability in harsh environments. Precious metals can be found in aerospace instruments, Cochlear Implants, catheters, pacemakers, and monitoring equipment. Platinum wire is sometimes specified for high temperature semiconductors. Many catheters contain platinum marker bands and guide wires, which are used to help surgeons, guide the device to the treatment site, and are easily seen on X-rays and Fluoroscopes.
Features
* Widespread uses
* Stable physical and chemical properties
* Small thermal expansion coefficient
* long service life
* Good thermal stability and oxidation resistance at high temperature
Comparison Property
| Material | Melting point °C | Density g/cm |
| Pure Pt — Pt(99.99%) | 1772 | 21.45 |
| Pure Rh— Rh(99.99%) | 1963 | 12.44 |
| Pt-Rh5% | 1830 | 20.70 |
| Pt-Rh10% | 1860 | 19.80 |
| Pt-Rh20% | 1905 | 18.80 |
| Pure Ir — Ir(99.99%) | 2410 | 22.42 |
| Pt-Ir5% | 1790 | 21.49 |
| Pt-Ir10% | 1800 | 21.53 |
| Pt-Ir20% | 1840 | 21.81 |
| Pt-Ir25% | 1840 | 21.70 |
| Pt-Ir30% | 1850 | 22.15 |