Features of Hafnium Diboride HfB2 Powder

Overview of diboride HfB2

Diboride H HfB2 belongs to ultra-high temperature ceramics, which is a kind of ceramics composed of ha and boron. Its melting temperature is about 3250°C. It is an unusual ceramic with high thermal and electrical conductivity, with the same properties as titanium diboride and zirconium diboride of the same structure. It is a grey metallic look material. Diborides have a hexagonal crystal structure with a molar mass of 200.11 g/mol and a density of ~10.5 g/cm³.

Features of Hafnium Diboride HfB2 Powder

Hafnium diboride is an ultra-high temperature ceramic composed of hafnium and boron. Its melting temperature is about 3250 degrees Celsius. It is an unusual ceramic with relatively high thermal and electrical conductivity, the same properties as the isostructural titanium and zirconium diborides. It is a grey metallic look material. Hafnium diboride has a hexagonal crystal structure with a molar mass of 200.11 g/mol and a density of 10.5 g/cm3. Hafnium Diboride HfB2 Powder

How is hafnium diboride HfB2 powder produced?

The combustion synthesis method of high-purity hafnium diboride powder is realized according to the following steps:

1. Mix the base material and diluent. Basic raw materials include hafnium dioxide, boric anhydride and magnesium powder. The weight percentages are: hafnium dioxide: 30% to 60%, boric anhydride: 10% to 40%, magnesium powder: 15% to 50%, and adding the thinner hafnium diboride is 0 to 3 times the weight of the basic raw material;

2. Drying and mixing;

3. Put the evenly mixed raw material powder into a graphite boat, and then put it into a closed pressure vessel. The closed pressure vessel is cooled by circulating water, and the reaction is kept in a protective atmosphere or vacuum with a pressure of 0-5Mpa. The self-propagating combustion of raw materials is converted into products;

4. Remove the product after cooling. The product is a mixture of hafnium diboride and magnesium oxide. The magnesium oxide is removed by acid washing, and the hafnium diboride is washed with water, filtered and dried to obtain hafnium diboride powder.

Diboride H HfB2 Applications

Hafnium diboride in wear-resistant coatings. It is also being considered for ultra-high temperature composites with silicon carbide (SiC) due to its excellent refractoriness. The addition of silicon carbide improves its oxidation resistance.

The oxidation resistance of diboride ha depends on temperature and pressure. At a temperature of 1500°C and a pressure of 1 atmosphere, a protective scale of magnesia is formed. When the temperature rises above 1600 °C and the pressure drops below 1 atmosphere, the oxidation resistance of HfB2 will be greatly reduced. Under these conditions, the boiling point of B2O3, one of the oxidation products of HfB2, was exceeded and a protective oxide layer was formed.

Due to its strength and thermal properties, the material has the potential to be used to accelerate reentry vehicles, such as ICBM insulation panels or aerodynamic fronts. Unlike polymers and composites, HfB2 can form an aerodynamic shape and does not disappear during reentry.

The price of diboride H HfB2

The price of diboride HfB2 will vary randomly with the production cost of diboride HfB2, transportation costs, international conditions, exchange rates, and the supply and demand of the diboride HfB2 market. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for diboride H HfB2, please feel free to send an inquiry to get the latest price of diboride HfB2.

Suppliers of diboride HfB2

As a global supplier of hydrogen diboride HfB2 powder, Tanki New Materials Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (titanium diboride, silicon hexaboride, molybdenum boride, iron boride), high-purity targets, functional ceramics and structural devices, and provides OEM services.