Among the most common compounds on Earth's surface is Aluminium oxide. It is found in bauxite and corundum. It has a very high melting point and is an electrical insulator. It is used in many industrial applications. It is also used in the manufacture of gemstones.
It is an amphoteric metal oxide. It has good thermal conductivity. Its chemical formula is Al2O3. It is a whitish solid with no odor. It is available in powder and pellet form. It is used in various chemical processes. It is also a useful refractory material.
Alumina is an inert material and it is also used in manufacturing ceramics and machining tools. It is commonly used in industrial ceramics and for biomedical applications. It is a good economic alternative to diamonds for machining. It is also used in artificial joints, bearings for artificial heart and artificial dental root.
Aluminum oxide is an important element in the formation of gem-quality corundum. Its color depends on the presence of traces of other metals. These include chromium and cobalt. Its reddish-red color comes from the traces of chromium.
Aluminum oxide is an amphoteric material, which means that it is a refractory metal. It resists alkali and acid attacks. It is used in many applications such as high-temperature electrical insulators, gas laser tubes, spark plug insulators and insulating heatsinks. It has a very high melting point, which makes it a good choice for building appliances that run at high temperatures. It is also suitable for abrasive uses.