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Aluminum Boride Powder PropertiesAluminum diboride remains stable in dilute cold acid but decomposes when heated hydrochloric or nitric. After heating and reacting, fine powders of boron and aluminum are mixed.
Aluminum diboride and AlB12 are two compounds of aluminum with boron. They are both commonly called aluminum boride. AlB12, a monoclinic black and shiny crystal with specific gravity 2.55 (18degC), is a dark and shiny substance. It is insoluble with water, alkali or acid. Nitric acid hot decomposes it. The alloy is produced by melting together boron, sulfur, and aluminum.
In the structure, aluminum diboride is composed of B atoms forming a graphite like sheet, with Al atoms interspersed. This structure is very similar in structure to magnesium diboride. The AlB2 crystal has metallic conductivity parallel to the hexagonal surface of the substrate.
Aluminum Boride Powder PreparationAluminum boride has a similar structure to other intermetallics. Its structure depends more on the crystallization of aluminum metal than its valence. 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 produce a reducing acid solution that contains HB(OH+3). AlB2 does not dissolve in dilute sulfuric or nitric acids.
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