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Aluminum boride AlB2 is a binary chemical compound that is formed from aluminum and boran. It is a dark gray powder at normal temperatures and pressures. It loses the gloss on its surface when heated.

Aluminum Boride Powder Properties

Aluminum diboride remains stable in cold dilute acids, but decomposes when heated hydrochloric or nitric. After heating and reacting, fine powders of aluminum are mixed with boron.
Aluminum diboride and AlB12 are two compounds of aluminium and boron. They are both commonly known as aluminum borid. AlB12, a monoclinic black and shiny crystal with specific gravity 2.55 (18degC), is a dark black and shiny substance. It is insoluble with water, alkali or acid. Nitric acid hot decomposes it. It is produced by melting together boron, sulfur and aluminium.

The structure of aluminium diboride is very similar to magnesium diboride. In this structure, B atoms create a graphite like sheet, with Al atoms interspersed. The AlB2 crystal has metallic conductivity parallel to the hexagonal surface of the substrate.

Aluminum Boride Powder Preparation

The structure of aluminium boride is very similar to the structure of intermetallic compound. It is more dependent on the valence relationship between aluminum metal and boran than its crystal structure. AlB2, AlB4, AlB12 and AlB4 are all aluminum borides. AlB2 diboride can be produced by a reaction between two elements at 600degC.

Powder metallurgy prepares AlB12 using amorphous Boron powder and Aluminum powder as the raw materials. Powder metallurgy is used to prepare AlB12 powder using amorphous boron powder and aluminum powder as raw materials.

Aluminum diboride may be dissolved with diluted hydrochloric to form a reducing acid solution that contains HB(OH+3). AlB2 does not dissolve in dilute sulfuric or nitric acids.

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