Boron powder is black or silver-gray solid. Crystal boron is black, its hardness is second only to diamond, and its texture is brittle.
Elemental boron is black or dark brown powder. When oxidized in air, the formation of diboron trioxide film hinders the continued oxidation of internal boron. Boron powder can react with fluorine at room temperature and is not corroded by hydrochloric acid and hydrofluoric acid aqueous solution.
Boron powder is insoluble in water, powdered boron is soluble in boiling nitric acid and sulfuric acid, and most molten metals such as copper, iron, manganese, aluminum, and calcium.
Boron powder uses in different fields
Boron powder is widely used in metallurgy, electronics, medicine, ceramics, nuclear industry, chemical industry and other fields.
1. Boron powder is used as a pyrotechnic additive. In terms of its energy, boron should be the best non-metallic fuel. And the ignition temperature of boron powder is greatly reduced due to its irregular shape and large specific surface area;
2. Boron powder is also an important raw material for the manufacture of high-purity boron halide, and other boron compound raw materials;
3. Boron powder is used as a deoxidizer in oxygen-free copper smelting. A small amount of boron powder is added during the metal smelting process. On the one hand, it is used as a deoxidizer to prevent the metal from being oxidized at high temperature;
4. Boron powder is used as an alloy component in special metal products to form alloys and improve the mechanical properties of metals.
5. Boron powder can also be used as welding aid;
6. Boron powder is used for solid rocket propellant;
7. Boron powder is used as an initiator for automobile airbags;
8. Boron powder is used as an additive for magnesia-carbon bricks used in high temperature furnaces for steelmaking;
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