Why aluminium diboride has high density and theoretical combustion heat?
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Author : Lzh
Update time : 2023-02-02 14:51:35
What is aluminum diboride? Aluminum borate(AlB2) is a binary compound formed by aluminium and boron. It is a red solid at room temperature and pressure, loses its surface lustre when heated, and is stable in cold dilute acid. It is decomposed in hot hydrochloric acid and nitric acid and is obtained by the heating reaction after mixing fine powders of aluminium and boron. It is one of the two compounds of aluminium and boron, and the other is AlB12, usually called aluminium borate. AlB12 is a black shiny monoclinic crystal with a specific gravity of 2.55 (18 ℃), insoluble in water and acid; Alkali, decomposed in hot nitric acid, is made by melting boron trioxide, sulfur and aluminium together. Structurally, B atoms form a graphite sheet with Al atoms between them, which is very similar to the structure of magnesium diboride. The single crystal of AlB2 shows metal conductivity on the axis parallel to the hexagonal plane of the substrate. Aluminium borate is harmful because it reacts with acid and hydrogen to produce toxic gases. For example, it reacts with hydrochloric acid to release borane and aluminium chloride.
Preparation method of aluminum diboride AlB12 powder was prepared by powder metallurgy using amorphous boron powder and aluminium powder as raw materials. The product's phase composition, relative content and micromorphology were determined by X-ray diffraction and scanning electron microscopy. The effect of buried powder on the phase composition of the product was studied, and the optimal process parameters were determined. The results showed that the content of Al in the buried powder determined the type of impurities in the product. The content of Al in the buried powder was 30% (mass content, the same as below), and there was a single substance of Al in the product; The Al content of the buried powder is 10%, and the impurities are mainly Al2O3; When the Al content of the buried powder is 20%, the impurity content is the least, mainly the magnesium oxide aluminium phase. The optimum synthesis process parameters are: synthesis temperature 1400 ℃, constant temperature time 60 min, 17.2% Al content of the ratio, and the Al content of the buried powder is 20%. The structure of aluminium borate is similar to that of metal intermetallics. Its structure mainly depends on the crystal structure of aluminium and boron, not their chemical valence relationship.
Application of aluminum diboride It is used for making refractory materials, insulating materials for furnaces, and industrial applications such as electronics, machinery, aviation, etc.; Boron nitride has many excellent properties. It is widely used as the insulator of high voltage and high-frequency electricity and plasma arc, coating of automatic welding high-temperature resistant frame, materials of high-frequency induction furnace, solid phase admixture of semiconductor, structural materials of an atomic reactor, packaging materials to prevent neutron radiation, transmission window of radar, media of radar antenna and components of the rocket engine, and It is used as a high-temperature lubricant and release agent for various models. The moulded boron nitride can make high-temperature crucibles and other products.
Price of aluminum diboride Aluminum diboride particle size and purity will affect the product's price, and the purchase volume can also affect the cost of aluminum diboride. A large amount of large amount will be lower. The price of aluminum diboride can be found on our company's official website.
Aluminum diboride supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including aluminum diboride, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective aluminum diboride, you are welcome tocontact us or inquire any time.
