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Aluminum is one of the best metals for conducting electricity. Its conductivity is very high, meaning that less energy will be lost while passing through it than with other metals like copper or steel. This also makes aluminium ideal for a wide range of applications where heat needs to be dissipated quickly. Its low cost and corrosion resistance make it a good alternative to other expensive metals.
The chemical formula for aluminium oxide is Al2O3. It is a white, odorless powder that has many different uses. It is an important raw material in the manufacture of alumina, a type of aluminium ceramic. It is also used as a catalyst and as an inert absorbent in the production of food, pharmaceuticals and cosmetics. It is also used as an abrasive and for microdermabrasion treatments.
Aluminium is a highly reducing metal, which means it spontaneously reacts with oxygen in the atmosphere. To prevent this reaction, it is coated with a layer of alumina that acts as a passivation barrier. This layer can be thickened and modified through anodizing, allowing it to be more durable and resistant to corrosion.
While aluminium itself is not magnetic, the aluminium oxide that forms on its surface does have electrical properties. It has a conduction band that is close to the valence band of its parent metal, which allows electrons to easily move across it. However, it does not have the same conductivity as pure aluminium.