Production and General information about hafnium
Are you interested in mining and General information about hafnium? Supplier KMZ offers to buy hafnium and its alloys at economical price. Supplier guaranteed timely delivery at any address specified by the consumer.
General information about hafnium
It is a silvery metal having a hexagonal crystal lattice. Refers to the number of rare metals, has a high plasticity. Its chemical characteristics are similar to the zirconium. The metal is considered non-toxic, however in powder form it is pyrophoric (prone to spontaneous ignition). Hafnium reacts with Halogens with the formation of tetrahalogenides, and at high temperatures it reacts with carbon, boron, nitrogen, oxygen, silicon and sulfur.
| Description | The value |
|---|---|
| Chemical symbol | Hf |
| Atomic (molar) mass, g/mol | 178,49 |
| Oxidation | 4, 3, 1 |
| Density [g/cm3] | For 13, 31 |
| The melting temperature t°C | 2233°C |
| The heat of fusion kJ/mol | 25,1 |
| The thermal conductivity K [W/(m·K)] | 23 |
| Heat of evaporation kJ/mol | 575 |
Chemical properties
Due to the formation of the oxide film on the surface of the metal despair high corrosion resistance. It is not affected by acids (except hydrofluoric) and alkalis. The oxide of hafnium Hf O2 is very inert. It reacts with strong acids such as concentrated sulfuric acid and a strong base and dissolves slowly in hydrofluoric acid. At elevated temperatures, it reacts with chlorine in the presence of graphite or carbon tetrachloride with obtaining tetrachloride of hafnium.
Mining
The largest deposits are in Zimbabwe; there is conducted extraction of a mixed zirconium-hafnium concentrate composed of an oxide of hafnium. The oxide of hafnium (IV) is an inorganic compound of formula HfO2. This colorless solid is one of the most common and stable compounds of hafnium. As a result of his recovery get a metal hafnium.
Application
With the ability to absorb neutrons and good mechanical and corrosion properties, hafnium is used for control rods in nuclear reactors It is also used in gas-filled lamps, and incandescent lamps. Hafnium alloys with some other metals, such as iron, niobium, tantalum and titanium, are heat resistant and used in aerospace devices, for example in space rocket engines.
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Are you interested in mining and General information about hafnium? Supplier KMZ offers to buy gafney its alloys at economical price. Supplier guaranteed timely delivery at any address specified by the consumer.
Supplier, price
Buy rare and refractory metals from a vendor KMZ can at an affordable price. The price is formed based on the European standards of production. Buy hafnium at a reasonable price, you can wholesale or retail. Regular customers can take advantage of the discount system of discounts from the company KMZ
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