Aluminum Diboride Powder Properties And Preparation
Aluminum Diboride Powder Properties
Aluminum diboride decomposes when heated. It is stable in cold dilute acids but not in hot hydrochloric or nitric. Aluminum diboride comes from mixing aluminum powders with boron powders after heating.Aluminum boride (also known as AlB12) is a compound of aluminum and boran. AlB12 has a specific weight of 2,55 (18degC) and is a monoclinic, shiny black crystal. 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 is similar to that of magnesium diboride. The metallic conductivity of single crystals of aluminium diboride is parallel to the hexagonal surface of the substrate.
Aluminum Diboride Powder Preparation
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.The structure of aluminium boride is very similar to the structure of intermetallic compound. Its main structure depends more on the crystallization of aluminum metal and of boron than their valence relation. Aluminum borides consist of AlB2, AlB4, AlB12 and their valence relationship.
Two simple substances with a melting point above 600 can react to form aluminum diboride AlB2. This is a multi-layered structure. Al atoms are directly overlapping (A mode) and B atoms have been filled into the triangular pillars created by the direct overlap.
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