About The Preparation Method And Overview Of Aluminum Carbide

Aluminum Carbide

Aluminum carburide also known by the name three-carbon-four-aluminum has a molecular form of AL4C3, a kind aluminum carbide. It is a transparent, hard and light yellow-brown rhombohedral crystalline material. It is a ionic and doesn’t conduct electricity at normal room temperature.

Aluminum Carbide:

Calcium carbide contains a small amount aluminum carbide. Aluminum carbide is often produced by corroding graphite electrodes when metal aluminum is melted using electrolysis. Aluminum carbide can be an undesirable component of metal matrix composites, or carbon fibres, that use aluminum to create the matrix. For instance, composites made of carbon fiber and aluminium matrix can react when the temperature is above 500. It can be prevented from reacting chemically if it is coated with a titanium boride layer. The reaction between aluminum melt and the silicon carbide particles produces an aluminum carbide layer on the surface. This reduces strength. This can be prevented by coating the silicon particles with a suitable oxide, nitride or other material.

Synthesis of Aluminum Carbon

Aluminum carbide Al4C3 may be produced by the direct combination at high temperature of two elements. Mix 1 part heavy black smoke and 6 parts aluminum powder. Moisten the mixture with pine oil. Spread a thin layer in a crucible made of clay and then spread a thick layer of carbon. The crucible is covered with a cover and the asbestos fibers mixed with refractory dirt are smeared in all gaps. The mixture is then fired for 30 mins at a temperature no lower than 1200 after the crucible has been pre-dried in an oven. Higher temperatures can improve the reaction. After cooling, the product will be treated with dilute alkaline or hydrochloric acids (or diluted hydrochloric solution) to remove any excess aluminum. After obtaining the aluminum carbide as a fine powder, it is washed to remove aluminum chloride with water. Alcohol is then used to quickly wash away the water. Finally, it is dried in a box with a temperature between 80 and 90 degrees. The product contains an excessive amount of aluminum chloride.

Aluminum carbide itself is colorless. However, the products that are made using the above method can have different colors because of impurities. Calculated amounts of aluminum and soot are calcined using hydrogen. This produces a pure aluminum carbide without aluminum nitride. This calcination must be performed at 18001900°C for 23 hours. The ground product is calcined once again at the same temperature.

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