Hafnium is a rare naturally occurring metal
Hafnium is a lustrous silver-gray metal discovered in 1925. It was the last element added to the periodic table with stable nuclei. Before him there was rhenium in 1923.
Hafnium Hafnium is a rare metal
Hafnium is an element that has very important commercial applications: it is used in nuclear power, electronic equipment, ceramics, light bulbs and ultralight gliders.
According to Jefferson's lab, hafnium carbide (HfC) has the highest melting point of any known two-element compound at nearly 7,034 degrees Fahrenheit (3,890 ° C). Total hafnium nitride (HfN) also has a high melting point, around 5981 degrees Fahrenheit (3,305 ° C). A three-element compound, a mixed tungsten and hafnium carbide, has the single highest melting point of any known compound at 7,457 ° F (4,125 ° C), according to Chemistry World. Some other hafnium compounds include hafnium fluoride (HfF 4) hafnium chloride (HfCl 4) and hafnium oxide (HfO 2).
Just facts about Hafnia
Atomic number (number of protons in the nucleus): 72
Atomic symbol (on the periodic table of elements): Hf
Atomic weight (average mass of the atom): 178.49
Density: 13.3 g per cubic centimeter
Phase at room temperature: solid
Melting point: 4051 degrees Fahrenheit (2233 degrees Celsius)
Boiling point: 8,317 ° F (4,603 ° C)
Number of isotopes (atoms of the same element with different numbers of neutrons): 32 (whose half-lives are known with mass numbers between 154 and 185)
Hafnium is an unusually corrosion-resistant metal and an excellent neutron absorber for use in nuclear submarines, nuclear reactor control rods, and critical technology used to support fission reactions. The control rods support an active fission chain reaction, at the same time prevent its uncontrolled acceleration.
Hafnium is also used in cathodes and capacitors. It is used in vacuum tubes as a getter - as a substance that collects and removes trace gases from the tubes. Hafnium is usually alloyed with other metals such as titanium, iron, niobium and tantalum. For example, heat-resistant hafnium alloys are used in aerospace development, in rocket and space engines.