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Thermite reaction

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Uploaded by on Nov 19, 2011

Thermite Reaction Chemistry Demo for Chemistry 221 Lab class at University of Oregon.
RANDY ROCKS!
The aluminium reduces the oxide of another metal, most commonly iron oxide, because aluminium is highly reactive: Fe2O3 + 2Al → 2Fe + Al2O3

The products are aluminium oxide, free elemental iron, and a large amount of heat. The reactants are commonly powdered and mixed with a binder to keep the material solid and prevent separation.

The reaction is used for thermite welding, often used to join rail tracks. Other metal oxides can be used, such as chromium oxide, to generate the given metal in its elemental form. Copper thermite, using copper oxide, is used for creating electric joints in a process called cadwelding: 3CuO + 2Al → 3Cu + Al2O3

Some thermite-like mixtures are used as pyrotechnic initiators such as fireworks.

Thermites with nanosized particles are described through a variety of terms, such as metastable intermolecular composites, super-thermite, nano-thermite, and nanocomposite energetic materials.

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