Product Name: Hafnium Diboride (HfB2)
Specification: 0.8-10um (D50)
Appearance: Irregular
Color: Black Grey
Features: high melting point, high thermal conductivity, oxidation resistance, stable chemical properties, high purity, small particle size, concentrated distribution, and good conductivity
Application: Wear resistant coatings, refractory materials, composite ceramic materials, ultra-high temperature ceramics, high-speed aircraft nose cones, aviation, aerospace and other fields
hafnium diboride
CAS ：12007-23-7
Molecular formula: B2Hf
Molecular weight: 200.112
Melting point: 3250 ° C
Appearance: Grey metal solid
Density: 10.5g/cm3
Relative molecular weight: 200.112
Main features:
Hafnium diboride (HfB2) is a gray black crystal with metallic luster, belonging to the hexagonal crystal system. As an excellent ultra-high temperature ceramic material, hafnium diboride (HfB2) has a high melting point (3380 ℃), high purity, small particle size, uniform distribution, large specific surface area, high surface activity, low bulk density, high conductivity, and stable chemical properties. At room temperature, it hardly reacts with all chemical reagents (except HF). A new type of ceramic material with high melting point, high thermal conductivity, oxidation resistance and other high-temperature comprehensive properties
Main purpose:
1. Due to its melting point of up to 3000 ℃, HfB2 has been commonly used as an anti ablation material in high-temperature oxidation environments, serving as a high-temperature resistant boride ceramic matrix. In the study, SiC was added as an additive to HfB2 ceramics to enhance their antioxidant properties. The literature used hot pressing method to prepare dense HfB2 SiC composite ceramics. The antioxidant capacity of this composite ceramic is higher than that of HfB2 ceramic without SiC addition, and like other ceramics, powder properties are also one of the key factors in preparing ceramics. The ultra-high temperature ceramic material mainly composed of hafnium diboride (HfB2) and zirconium diboride (ZrB2) can be used as a thermal protection system material for hypersonic aircraft in the atmosphere, and its application prospects are immeasurable.
2. The existing preparation methods for hafnium boride composite coatings include electrophoretic deposition, laser cladding, slurry coating, in-situ reaction, and thermal spraying.
3. Hafnium boride (HfB2) has high temperature characteristics and good oxidation resistance, and can be used as a high-speed material for space rockets. Applied in the fields of ultra-high temperature ceramics, high-speed aircraft nose cones, aviation, aerospace, etc., it is a potential candidate material for ultra-high temperature ceramics and is often used as an anti ablation material in high-temperature oxidation environments. It also has the characteristics of high hardness, high modulus, high thermal conductivity, and high electrical conductivity.
4. Hafnium boride can be combined with other materials to prepare fiber materials, such as composite carbon fibers.
Nature and stability:
When used and stored according to specifications, it will not decompose. It does not react with concentrated sulfuric acid, potassium sulfate mixture, and phosphoric acid at room temperature, but reacts with concentrated hydrochloric acid and concentrated nitric acid mixture.
Packaging and storage: This product is packaged in an inert gas aluminum foil bag, sealed and stored in a dry, cool environment. It should not be exposed to air to prevent moisture from causing oxidation and aggregation, which may affect dispersibility and effectiveness of use.
