Production process and application of Boron Carbide

    Boron carbide is a black crystal with metallic luster, commonly known as black diamond, boric acid as the main raw material, add petroleum coke and other carbon materials, after high temperature solid smelting, crushing and processing of a kind of powdered products, and diamond, cubic boron nitride belongs to the same super-hard materials.

    Boron carbide is insoluble in water and organic solvents, chemically stable, resistant to acid and alkali corrosion, almost does not react with all acids and alkali solutions. Boron carbide also has the following characteristics: has a large thermal neutron capture cross-section, neutron absorption ability, so there is a neutron absorber called; with semiconductor, and so on.

    The biggest use of boron carbide is as a raw material for abrasives and manufacturing abrasives. It is suitable for grinding, polishing, drilling and other processing of various carbide tools, molds, parts, components and gems. With appropriate amount of oil or water as lubricant, boron carbide can be made into grinding paste and polishing paste. Boron carbide can also be used as a raw material for manufacturing metal borides, boron alloys, boron steel and so on. In addition, in the special needs of the occasion, can be used for the manufacture of boron carbide hot pressing products, for wear-resistant, high-temperature parts, such as nozzles, sealing rings, gyroscopes, petrochemical parts, as well as lightweight and high-strength parts of military engineering and the control rods of atomic reactors.

    At present, the domestic large-scale industrial production of boron carbide is mostly synthesized by arc-melting method. The use of boric acid (mass fraction greater than 92%), artificial graphite (fixed carbon mass fraction greater than 95%), petroleum coke (fixed carbon mass fraction greater than 85%) three raw materials.