What is Aluminium boride? Aluminum diboride (AlB2) is a chemical compound made from the metal aluminum and the metalloid boron. It is a red solid under normal temperature and pressure. When heated, it loses its surface luster and is stable in cold dilute acid. It is decomposed in hot hydrochloric acid and nitric acid. It is one of two compounds of aluminum and boron, the other being AlB12, both commonly referred to as aluminum boride. AlB12 is a black and glossy monoclinal crystal with a specific gravity of 2.55(18℃), insoluble in water, acid, and alkali, decomposition in hot nitric acid; It is obtained by melting boron trioxide, sulfur, and aluminum together.
Method of producing an aluminium boride The term "aluminum boride" as used herein is to be understood as including both aluminum diboride (AlB₂) and aluminum dodecaboride (AlB₁₂), both of which are potentially useful precursors for production by reaction sintering of refractory composites containing titanium diboride (TiB₂). However, efforts to develop a commercially viable method for manufacturing TiB₂ - containing materials based on reactions such as the above are handicapped by the restricted commercial availability and the consequent high Price of AlB₂ and AlB₁₂ and intended to produce these materials at a lower cost using commercially available raw materials and, as far as possible, production processes in common industrial use. GB-A-1,192,677 describes a method of preparing aluminum diboride flakes that adds up to 5% of a boron source to a molten aluminum bath. The bath is maintained at an elevated temperature, not exceeding 975°C, for sufficient time to permit solubilization of the boron source and crystallization of the aluminum diboride flakes. The flakes may be recovered by, for example, filtering the melt through a perforated graphite plate. This disclosure is concerned solely with producing aluminum diboride in flake form, and there is no suggestion to remove the filter medium by selective chemical attack.
Aluminium-boron alloys are commercially available Aluminium-boron alloys are commercially available and can simply be heated to provide the desired starting body of molten aluminum containing suspended particles of an aluminum boride. The industrial process for manufacturing aluminum-boron alloys uses a coreless induction furnace; mains frequency is preferred. A predetermined quantity of potassium borofluoride KBF₄ powder is fed via a screw feeder or other suitable device onto the surface of the molten Al while supplying power to the induction coils to stir the melt. Boron (B) contents of commercial alloys are usually either nominally 3% or 4%, and B recovery from KBF₄ is typically between 80 and 90%. The temperature of the Al determines whether the boride is produced as AlB₂, which is the low-temperature phase, or AlB₁₂. The transition temperature from AlB₂ to AlB₁₂, as reported in the literature, used to be somewhat uncertain, e.g., Mondolfo has reported approximately 1200°K (927°C), whereas Willey (ASTM Metals Handbook, 1973) reported approximately 1350°C. The experience of master alloy manufacturers indicates the latter to be too high. AlB₂-containing alloys are produced at temperatures within the range of 750 - 850°C, typically 800 - 850°C. AlB₁₂-containing alloys are produced at 950 - 1200°C, typically 1000 - 1100°C. 4Price of Aluminium boride Aluminium boride particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Aluminium boride. A large amount of large amount will be lower. The Price of Aluminium boride is on our company's official website.
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