Hafnium Diboride HfB2 Powder CAS 12007-23-7, 99% |

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Hafnium-boride, crystals with metallic luster in gray. The melting temperature is 3250° Celsius. Purity>99.5%
Particle Size: 3 um
Hafnium Diboride Powder HfB2:
Hafnium-boride and Hafnium-diboride are gray crystals with a metallic sheen. It has a high level of conductivity, and its chemical properties are stable. It is a chemically stable material that does not react with any reagents at room temperature (except for hydrofluoric). It can be prepared by heating carbon powder with hafnium carbide, boron oxide, or hafnium dioxide, or by reducing the hafnium tetrachloride to boron trichloride by hydrogen reduction. It is used to make a high temperature alloy.

Hafnium-diboride exhibits high melting points, high hardness and electrical and thermal conductivity. It also shows good neutron absorbency. It is widely used as a material for ultra-high temperatures, superhard materials (electrodes), and neutron absorbers.

The use of Hafnium Diboride Ceramicsand Composite Materials is expanding due to the rapid development of materials technology. The quest for low-cost and high-quality hafnium powder is an important area of research and technology both at home and abroad. Hafnium is difficult to sinter. It is important to use ultrafine powder to improve sintering. The nano-powder, although it has a superior performance, is also expensive and difficult to disperse in raw materials processing. Sub-micron hafnium Diboride Powder has therefore been given more and more consideration.

Hafnium diboride belongs to the class of Ultra-high-temperature ceramics, a type of ceramic composed of hafnium and boron. Hafnium-boride melting temperature is approximately 3250 degC. It is a ceramic with unusual properties, including high thermal conductivity and electrical conductivity. Zirconium diboride, isostructural titan diboride, and this ceramic share these characteristics. It is a grey metallic-looking substance. Hafnium diboride is a hexagonal crystalline material with a molar density of 10.5 grams/cm3 and a molar volume of 200.11 g per mole.

Hafnium dioxideis combined with carbon and boron to improve consolidation of hafnium powder. This is usually formed by hot pressing. In this process, the powders and heat are combined to form a solid.

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Specifications on Hafnium Diboride HfB2 Powder:
Hafnium diboride powder MF: HfB2
Hafnium diboride powder CAS: 12007-23-7
Hafnium diboride powder EINECS: 234-500-7
Hafnium diboride powder Density: 10.5 g/cm3
Hafnium diboride melt point: 3250 degrees C
Hafnium diboride powder MOQ: 1kg
Hafnium diboride Particle size: micro, nano and according to customer’s request
Hafnium diboride powder Package: Aluminum bag,Vacuum packing, 1kg/bag, or as your request.

Hafnium Diboride HfB2 Powder:
Hafnium diboride, also known as ultrahigh-temperature ceramic, is made of hafnium. The melting point is approximately 3250 degrees Celsius. It is a ceramic with unusual properties, including high thermal and electric conductivity. Zirconium diboride, isostructural titan diboride, and boron diboride all share these characteristics. It has a metallic grey color. Hafnium diboride, with a hexagonal structure, has a molecular mass of 200.11g/mole and a density of 10.5g/cubic centimeter.

Follow these steps to realize the combustion synthesis method for high-purity hafnium boron diboride powder:
1. Mix basic raw materials, diluents and additives. Hafnium anhydride, magnesium powder and boric oxide are the basic raw materials. Hafnium dioxide is 30% to 60% by weight; boric anhydride is 10% to 40% and magnesium powder is 15% to 50%.
2. Drying and mixing
3. After loading the uniformly blended raw material powder in a graphite-boat, place it inside a closed pressure vessel. The closed vessel is cooled using circulating water and the reaction is kept under a protective environment with a pressure between 0-5Mpa, or vacuum conditions. The raw materials undergo self propagating combustion, and then are converted into products.
4. Remove the product once it has cooled. The product is composed of hafnium dioxide and magnesium oxide. The hafnium is then washed, filtered and dry to produce hafnium powder.

Applications o Powder Hafnium Diboride
Hafnium is also used as a component in coatings to resist wear. Its use has also been looked at for use in ultra-high-temperature composites in conjunction with silicon carbide (SiC), due to its excellent refractoriness. Its oxidation resistance is improved by adding silicon carbide.
Hafnium diboride’s oxidation resistence is affected by temperature and pressure. Hafnia’s protective oxide scale is formed at temperatures of 1500 degC under pressure of 1 atm. HfB2 loses its oxidation resistant when pressures and temperatures drop below 1atm. The boiling temperature of HfB2 (which is one of its oxidation products) and the protective oxide are exceeded under these conditions.
A combination of its thermal properties and strength makes it a good material for hypervelocity reentry vehicles, such as ICBMs. The HfB2 material can be made into aerodynamic shapes which will not melt during reentry.
Hafnium-diboride is being investigated as an alternative material for the control rods of nuclear reactors.
Hafnium-diboride has also been investigated as a barrier to microchip diffusion. The barrier, if correctly synthesized, can be thinner than 7 nm.

Storage Conditions of Hafnium diboride (HfB2) powder:
The HfB2 Hfnium powder will be affected by damp reunion. Therefore, it is important to store the powder in a dry and cool room. HfB2 Powder should not be exposed to stress.

Packing & Shipping Hafnium diboride powder HfB2:
The packaging we offer is dependent on the amount of hafnium Diboride HfB2 Powder.
Hafnium diboride HfB2 powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Shipping of Hafnium diboride powder HfB2: can be sent by air, sea or express as soon as payment has been received.

Technology Co. Ltd., () is an established global chemical material manufacturer and supplier with over 12 years’ experience in the production of high-quality nanomaterials. These include boride powders, graphite or nitride particles, as well as sulfide particles, powders for 3D printing, etc.
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Hafnium Diboride Properties

Alternative Names hafnium boride, HfB2 powder
CAS Number 12007-23-7
Compound Formula HfB2
Molecular Mass 200.112
Appearance Black Powder
Melting Point 3250 degC
Boiling Point N/A
Density 10.5 g/cm3
Solubility In H2O N/A
Exact Count 201.965161

Hafnium-Diboride Health & Safety Information

Sign Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Declarations N/A
Transport Information N/A
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