Name: Tungsten diboride

Molecular formula: WB2

CAS: 12228-69-2

Appearance: black gray solid powder

Density: 10.77g/cm3

Melting point: 2900℃

Properties: The structure of tungsten boride is octagonal crystal, the appearance is black powder, insoluble in water, soluble in aqua regia, with high hardness, high toughness, wear resistance, high temperature resistance, corrosion resistance, good chemical stability and electrical conductivity, and excellent absorption of neutrons and other characteristics.

Application :BW2 has high melting point, high hardness, high conductivity and high corrosion resistance and oxidation resistance to different types of media, these excellent characteristics make T-B compounds can be widely used in the harsh environment of wear-resistant coatings and semiconductor films, high temperature corrosion resistant electrode materials, melting and casting molds, crucible and so on.

Tungsten boride is commonly used as structural materials, wear-resistant materials, electrode materials, semiconductor films, cutting tool materials, corrosion resistant materials, etc. A workpiece with a tungsten-boride rich coating is prepared, which comprises a workpiece matrix, a tungsten layer, a tungsten boride gradient layer and a tungsten-boride rich coating arranged successively on the matrix; The boron content is gradually increased along the thickness direction of the workpiece matrix towards the tungsten layer and the tungsten boride gradient layer.
Application of tungsten boride metal/polymer composites in the field of nuclear shielding materials

At present, nuclear shielding materials usually need to add components to prevent neutrons and gamma rays at the same time to achieve the function of shielding neutrons and gamma rays at the same time, and the tungsten boride developed by this team can just meet the above requirements. Therefore, the team took tungsten boride as the main component, through metal infiltration, powder metallurgy and other material preparation technology, developed high volume density tungsten boride aluminum matrix composite, tungsten boride titanium matrix composite, tungsten boride polymer matrix composite, which has uniform component distribution, excellent mechanical properties, and both neutron and gamma ray shielding properties. The related preparation process is simple, the shielding components are easy to control, and can meet different radiation sites. The thermal neutron shielding rate of the 3mm thick tungsten-aluminum boride composite reaches 99%. The 15cm thick tungsten-aluminum boride composite has a shielding rate of 99% against gamma rays (0.662 MeV). It can be seen that the new nuclear radiation protection composite material of tungsten boride developed by this team is expected to be widely used in spent fuel storage, aerospace, reactor shielding, instrumentation components, medical radiation protection and other fields.

Note: It will decompose in the natural environment, so it is generally stored in a closed, cool and dry environment.