Hafnium diboride HfB2 powder CAS 12007-23-7

Hafnium boride, gray with metallic luster crystals. The melting point is 3250 degrees Celsius, the conductivity is large, and the chemical properties are stable.<br/> Purity>99.5%<br/> Particle Size: 3 um<br/>

Product Details

Hafnium diboride HfB2 powder Overview:

Hafnium boride is a gray crystal with metallic luster. It has high conductivity and stable chemical properties. It hardly reacts with all chemical reagents (except hydrofluoric acid) at room temperature. It is prepared by mixing and heating hafnium dioxide, boron oxide or boron carbide, and carbon powder, or by reducing hafnium tetrachloride and boron trichloride under hydrogen at 2000 ℃ or directly reacting hafnium and boron. It is used as a superalloy.

Hafnium diboride has high melting point, high hardness, good electrical and thermal conductivity and good neutron absorption performance. It has important applications in the fields of ultra-high temperature materials, super-hard materials, electrode materials and neutron absorption materials.

With the development of material technology, the application fields of hafnium diboride ceramics and composite materials are becoming more and more extensive. Obtaining low-cost, high-quality hafnium diboride powder is currently an important R&D director at home and abroad. Hafnium diboride is difficult to sinter. In order to improve the sintering performance, it is necessary to obtain ultrafine powder. Although nano-powder has superior performance, it has high cost, it is not easy to disperse during raw material processing, and the process is difficult. Therefore, the development of submicron hafnium diboride powder has attracted more and more attention.

Hafnium diboride belongs to ultra-high temperature ceramics, which is a ceramic composed of hafnium and boron. Its melting temperature is approximately 3250 °C. It is an unusual ceramic with relatively high thermal and electrical conductivity, and has the same characteristics as isomorphous titanium diboride and zirconium diboride. It is a gray metal appearance material. Hafnium diboride has a hexagonal crystal structure with a molar mass of 200.11 g/mol and a density of approximately 10.5 g/cm³.

Hafnium diboride HfB2 powder Application:

What are the applications of hafnium diboride HfB2 powder?

Hafnium diboride in wear-resistant coatings. Due to its excellent fire resistance, it is also considered to be used in ultra-high temperature composite materials together with silicon carbide (SiC). The addition of silicon carbide improves its oxidation resistance.

The oxidation resistance of hafnium diboride depends on temperature and pressure. At a temperature of 1500 °C and a pressure of 1 atmosphere, a protective oxide scale of hafnium oxide is formed. When the temperature rises above 1600 °C and the pressure drops below 1 atm, the oxidation resistance of HfB2 will be significantly reduced. Under these conditions, the boiling temperature of B2O3 (one of the oxidation products of HfB2) will exceed and a protective oxide layer will form.

Due to its strength and thermal properties, the material may be used in ultra-high-speed reentry vehicles, such as heat shields for intercontinental ballistic missiles or aerodynamic fronts. Unlike polymers and composite materials, HfB2 can form an aerodynamic shape and will not ablate during reentry.

Hafnium diboride has also been studied as a possible new material for nuclear reactor control rods.

Hafnium diboride is also being studied as a diffusion barrier for microchips. If the synthesis is correct, the barrier thickness can be less than 7 nm.

Hafnium diboride HfB2 powder price:

The price of Hafnium diboride HfB2 powder varies randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and changes in market supply and demand for Hafnium diboride HfB2 powder. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for Hafnium diboride HfB2 powder material, please feel free to contact to get the latest Hafnium diboride HfB2 powder price.

Hafnium diboride HfB2 powder supplier:

As a global supplier of Hafnium diboride HfB2 powder, Tanki New Materials Co.,Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.