Mechanical properties of hafnium
Percentage composition of hafnium iodide GFI1 GOST 22517-77
| Fe | C | Si | Mn | Ni | Cr | N | Ti | Al | Zr | Ca | Mg | Hf + Zr |
| ≤0.04 | ≤ 0.01 | ≤0.005 | ≤0.0005 | ≤0.05 | ≤0.003 | ≤0.005 | ≤0.005 | ≤0.006 | ≤ 1 | ≤0.01 | ≤0.004 | over 99.8 |
The price of hafnium of 99% purity is about $780 per kg. 99% purity Hafnium (Hf) is a heavy refractory metal with a specific gravity of 13.31 g/cm³. Valence +4, +3, +1, boiling point = 4603 °C, t° of melting = 2233 °C. The thermal neutron capture cross-section is about 100 barns, which is 2000 times larger than that of zirconium at 0.2 barns, which is why zirconium is used in nuclear boilers .
Properties of Hf
| Description | Value |
|---|---|
| Atomic (molar) mass g/mol | 178,49 |
| Oxidation states | 4, 3, 1 |
| Density [g/cm3] | 13,31 |
| Melting point t°С | 2233°С |
| Melt heat kJ/mol | 25,1 |
| Thermal conductivity K [W/(m-K) | 23 |
| Evaporation heat kJ/mol | 575 |
Use
The ability to capture neutrons has led to the use of hafnium in the form of control rods in nuclear reactors. Thanks to its heat resistance and high degree of refraction HfF4 and HfO2 are used in the manufacture of multilayer and astronomical X-ray mirrors, fiber optics, night vision devices. The low electron yield operation allows the production of electron gun cathodes and thermionic efficient electrical generators from this metal.
Supplier
We offer rare metals from the specialized warehouses of the supplier Evek GmbH with delivery in any city. Full compliance with modern quality standards. Supplier Evek GmbH offers to buy hafnium, the price is optimal in this segment of metal products.
Buy, bargain price
Supplier Evek GmbH offers hafnium and its alloys, price - determined by the technological features of production without including additional costs. The company's website displays information on the latest arrivals of products. We invite to partner cooperation.
