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Aluminium dodecaboride is one of the hardest borides. It contains 17% aluminum by weight. Borides are often used in semiconductors and composite materials because of their unique electrical structure. In addition, most borides have stable chemical and electronic properties.
Aluminum dodecaboride is also used in turbine blades and rocket nozzles. It is very hard and is metal-like in conductivity.
Aluminum dodecaboride has recently been found to be superconductive. Because of its high electrical conductivity, it can be used to adjust the conductivity of semiconductor materials. Moreover, it can be obtained with low cost.
The synthesis process of aluminium dodecaboride can be achieved by a self-propagating method. In this method, an ignition device is connected to a resistance wire. During the process, the wire is shifted from place to place in a heated atmosphere. This process is characterized by the fact that it has a low purity.
Phase analysis results show that the self-propagating powder is contaminated by unremovable MgAl2O4 impurities under argon conditions. These impurities cause the failure of the self-propagating method.
However, the process of making the aluminium dodecaboride is simple. First, the raw material (amorphous boron powder) is reacted with boron(III) oxide to form a mixture. Carbon is then added.
Then, the reaction is continued. Then, the impurities are leached out of the synthesized powder. Afterwards, the material is vacuum annealed. After this, the product is prepared to USP.
The boron concentration of the AlB12 is 82.8 percent. The Al content is 17.2%.
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