Why aluminium carbide has high hardness

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What is aluminium carbide?

Aluminium carbide, also known as aluminium tetracarbide, with molecular formula Al4C3, is a kind of aluminium carbide. It is a yellowish brown, hard, transparent rhombic hexahedral crystal, an ionic crystal. It does not conduct electricity at room temperature, and the crystal structure is complex. The metal atoms in the system can be 4,5,6 coordinated, the length of the Al-C bond is 1.90-2.22A, and the shortest C-C bond is 3.16A. The X-ray study shows a single carbon atom in the structure in the form of discrete carbon negative ion C-4, which is different from acetylene.

Al4C3 is prepared directly by combining two simple substances at high temperatures. First, prepare a mixture consisting of 1 part of heavy smoke black and six parts rich aluminium powder; moisten the mix with pine oil, put a tight layer in a clay crucible, and lay a layer of carbon powder on it. The crucible should be covered with a lid, and all the gaps should be coated with refractory clay mixed with asbestos fibres. Then, put the crucible containing the mixture in the oven for pre-drying, and burn the mixture at a temperature not lower than 1200 ℃ for 30min. Higher temperatures can make the reaction better. After cooling, treat the product with dilute hydrochloric acid (or alkali solution) under cooling to remove excess aluminium. The aluminium carbide prepared as a fine crystalline powder is washed with water to remove aluminium chloride and then washed away with alcohol quickly. The product is dried in a drying oven at 80|90 ℃. The product contains a large amount of aluminium nitride. Pure aluminium carbide is colourless, but the products produced by the above method often have different colours due to impurities in raw materials. When the mixture of the calculated amount of aluminium and soot is calcined in hydrogen, a pure product without aluminium nitride can be prepared. The calcination shall be carried out at 1800|1900 ℃ for 2|3h. The product obtained shall be ground and calcined again at the above temperature.

Aluminium carbide is often used as an additive to enhance the strength of ternary aluminium-based materials (Al-Si AlC, Al Ali AlC). In addition, AlC is an essential compound in the technical field of the metal aluminium industry. It is used to reduce metal oxides in the metallurgical industry, chemical reaction catalysts in the chemical industry, and advanced ceramic materials such as high temperature, cutting and mould manufacturing in the ceramic industry. As an ionic compound Chemicalbook, in the lattice structure of AlC, carbon atoms exist in the form of C alone. C has strong alkalinity. During hydrolysis, it generates methane through C+4H → CH, so AlC also acts as a methane generator and dryer. At the same time, the rhombic hexahedron of AlC is a structure of alternating layers of AlC and AlC. This unique structure makes one-dimensional AlC nanowires a potential cold electron emitter.

Aluminium carbide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of aluminium carbide. A large amount of large amount will be lower. The price of aluminium carbide can be found on our company's official website.

Mis-asia Technology Co. Ltd. (Mis-asia) 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 aluminium carbide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective aluminium carbide, you are welcome to contact us or inquire any time.

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