Hafnium Boride

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hafnium boride (HfB2) is an ultra-high temperature ceramic containing hafnium and boron. It has a melting point of 3250 degrees Celsius and is an unusual ceramic with relatively high thermal and electrical conductivity.

Applications: Wear resistant coatings, refractory materials and cutting tools. Also employed as a nuclear reactor control rod due to the presence of boron element.

Molecular structure of hafnium boride: A mixture of the oxides of boron and hafnium with traces of carbon or oxygen, in a tetragonal crystal system.

Characteristics of hafnium boride: Strong anti-oxidation ability, very good insulator and high hardness. It is a potential candidate material for high-temperature ceramics and wear-resistant materials.

Process of synthesis: This compound is synthesized via a carbothermic reduction of hafnium oxide, boron carbide and graphite followed by a borothermic reduction of boron and hafnium. The product has high purity, good dispersibility, small grain size and narrow distribution range.

Typical use: HfB2 is used as a refractory and tribological coating due to its high thermal and electrical conductivities. It is also a potential new material for nuclear reactor control rods and hypervelocity re-entry vehicles like ICBM heat shields or aerodynamic leading-edges, due to its strength and thermal properties.

American Elements produces several standard grades when applicable, including Mil Spec (military grade), ACS, Reagent and Technical Grade, Food, Agricultural and Pharmaceutical Grade, Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available.