What's Alumina?

Alumina is often a mineral composed of aluminum and oxygen. We percieve it in numerous forms that individuals would never think of regarding the the aluminum of our pans and pots or even the oxygen in mid-air we breathe. One of these that is certainly almost pure alumina ceramic tube is corundum, which in the finest form is really a precious stone- sapphire or ruby-and in less beautiful forms is situated in such abrasives as emery. Alumina is also called aluminum oxide. As a white powder, it is found in producing aluminum. Aluminum is a metal of the silvery gray color.

It is really an element, so that it isn't made by combining other substances. Aluminum is useful in many ways. It is much lighter than the majority of metals. It never rusts. Being soft, it can be easily hammered, rolled or pressed into any desired shape. Aluminum is lighter than copper which is nearly as good for conducting electricity. It is then useful as electric wire and parts of electric machines. It can be rolled into sheets thinner than tissue paper, called foil, which are used to wrap stuff that would be spoiled by dirt or water. The truth is aluminum every single day. Pots and pans are made of it. Its softness causes it to be good for toothpaste tubes. Because it doesn't rust and is also so light, it is used for making airplanes, railroad cars, truck bodies, boats, and bridges. Its silvery color helps it be attractive in paints, signs, and several other things.