Recently, a team of international scientists reported a new type of superhard material that can be used in drilling, machinery manufacturing, and other fields-a compound based on tungsten boride. Studies have confirmed that the performance of the new tungsten boride developed is superior to the hard tungsten carbide-cobalt composite materials and artificial diamond materials that are currently being widely used.
Overview of Tungsten Boride
Tungsten boride is a black powder. Its physical properties are as follows: Molecular formula: BW2, molecular weight 378.49, density 1.6 g/ml, melting point: 2670°C, metal conductivity, soluble in aqua regia Tungsten diboride should be stored in a closed, cool and dry environment. It will not decompose if used in accordance with the regulations.
Uses of tungsten boride
The bulk material of tungsten diboride has a series of excellent properties such as certain hardness, good stability, and a good neutron absorption effect. Tungsten diboride materials are widely used in corrosion-resistant materials, cutting tools, and new shielding materials.
Synthetic method of tungsten boride
1. Take metallic tungsten and boron as raw materials, mix and grind them thoroughly, heat and react at above 1400°C to obtain tungsten boride, continue the reaction to generate W2B, and then cool and pulverize to obtain the product.
2. Tungsten is mixed with stoichiometric boron powder in molar ratio W: B=2:1, and sintered in vacuum or argon atmosphere at 1200-1300°C to obtain two tungsten boride.
3. Using the solid-phase method. Tungsten boride is prepared from metal tungsten and boron, and the reaction formula is as follows. The stoichiometric metal tungsten powder and elemental boron are fully mixed, ground, and molded, and heated, and reacted at a temperature above 1400°C to obtain tungsten boride. Continue the reaction to generate W2B, which is cooled and crushed to obtain the product.
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