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Characteristic
Hafnium diboride belong to the class of Ultra-high-temperature ceramics, a type of ceramic composed of hafnium and boron. It has a melting temperature of about 3250 degrees Celsius. It is an unusual ceramic, having relatively high thermal and electrical conductivities, properties it shares with isostructural titanium diboride and zirconium diboride. It is a grey, metallic looking material. Hafnium diboride has a hexagonal crystal structure, a molar mass of 200.11 grams per mole, and a density of 10.5 grams per cubic centimeter.
Chemical formula：HfB2
Molar mass：200.11 g/mol
Density：10.5 g/cm3
Melting point：ca. 3,250 °C (5,880 °F; 3,520 K)
Crystal structure：Hexagonal, hP3
Solution:Incompatible with strong oxidizing agents.
Application
Hafnium boride is used in wear resistant coatings. It is also employed as a nuclear reactor control rod. Furthermore, it is used in hypervelocity re-entry vehicles like ICBM heat shields or aerodynamic leading-edges. It is useful in the preparation of high temperature composites in conjunction with silicon carbide (SiC).
Characteristic
Hafnium diboride belong to the class of Ultra-high-temperature ceramics, a type of ceramic composed of hafnium and boron. It has a melting temperature of about 3250 degrees Celsius. It is an unusual ceramic, having relatively high thermal and electrical conductivities, properties it shares with isostructural titanium diboride and zirconium diboride. It is a grey, metallic looking material. Hafnium diboride has a hexagonal crystal structure, a molar mass of 200.11 grams per mole, and a density of 10.5 grams per cubic centimeter.
Chemical formula：HfB2
Molar mass：200.11 g/mol
Density：10.5 g/cm3
Melting point：ca. 3,250 °C (5,880 °F; 3,520 K)
Crystal structure：Hexagonal, hP3
Solution:Incompatible with strong oxidizing agents.
Application
Hafnium boride is used in wear resistant coatings. It is also employed as a nuclear reactor control rod. Furthermore, it is used in hypervelocity re-entry vehicles like ICBM heat shields or aerodynamic leading-edges. It is useful in the preparation of high temperature composites in conjunction with silicon carbide (SiC).
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