What are the properties of aluminum?

(1) Aluminum has a very small density of only 2.7

g/cm

3

Although it is soft, it can be made into various aluminum alloys, such as hard aluminum, super hard aluminum, rust resistant aluminum, cast aluminum and so on.

(2) Aluminum is second only to silver and copper in electrical conductivity. Although its electrical conductivity is only 2/3 of that of copper, its density is only 1/3 of that of copper, so the mass of aluminum wire is only half that of copper wire for transporting the same amount of electricity.

(3) Aluminum is a good conductor of heat, and its thermal conductivity is 3 times greater than iron. Aluminum can be used to make all kinds of heat exchangers, heat dissipation materials and cooking utensils in industry.

(4) Aluminum has good ductility (it is second only to gold and silver in ductility).

(5) The surface of aluminum is not easy to be corroded because of the dense oxide protective film.

(6) aluminum powder with silver luster (general metal in powder color is black), often used to do paint, commonly known as silver powder, silver paint, to protect iron products from corrosion, and beautiful.

Burning aluminum in oxygen gives off a great deal of heat and dazzling light

(8) Thermite is commonly used to melt refractory metal and weld rail, etc. Aluminum is also used as a deoxidizer in steelmaking. Aluminum powder and graphite, titanium dioxide (or other high melting point metal oxide) according to a certain ratio of uniform mixing, coated on the metal, calcined by high temperature and made of high temperature resistant cermet, it has an important application in rocket and missile technology.

(9) aluminum plate reflectance of light is also very good, reflecting ultraviolet light is stronger than silver, the purer aluminum, the better its reflectance ability, so it is often used to manufacture high-quality mirrors, such as solar oven mirrors.

(10) Aluminum has sound absorption performance and sound effect is better, so the ceiling of broadcasting rooms and modern large buildings are also made of aluminum

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