What is aluminum used for?

The use of a substance depends on its nature. Aluminum has a wide range of applications because of its excellent properties.

(1) The density of aluminum is very small, only 2.7g/cm3, although it is soft, but can be made into various aluminum alloys, such as duralumin, super duralumin; Rustproof aluminum, cast aluminum, etc. These aluminum alloys are widely used in aircraft, automobiles, trains, ships and other manufacturing industries. In addition, space rockets, space shuttles, artificial satellites also use a large number of aluminum and its alloys. For example, a supersonic plane is made up of about 70 percent aluminum and its alloys. Aluminum is also used extensively in ship construction. A large passenger ship often uses several thousand tons of aluminum.

(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. The oxide film on the surface of aluminum not only has the ability of corrosion resistance, but also has a certain insulation, so aluminum is widely used in electrical manufacturing industry, wire and cable industry and radio industry.

(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 (its ductility is second only to gold and silver), at 100℃ ~ 150℃ can be made into thin aluminum foil at 0.01mm, these aluminum foil is widely used in packaging cigarettes, candy, etc., can also be made into aluminum wire, aluminum strip, and can roll a variety of aluminum products.

(5) Because of the dense oxide protective film on the surface of aluminum, it is not easy to be corroded. It is often used to manufacture chemical reactors, medical devices, refrigeration devices, oil and gas pipelines, etc.

(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.

(7) When burned in oxygen, aluminum gives off a great deal of heat and dazzling light, and is often used to make explosive mixtures. Such as ammonium aluminum explosive (made of ammonium nitrate, charcoal powder, aluminum powder, smoke black and other combustible organic mixture), combustion mixture (such as thermite made of bombs and shells can be used to attack difficult to fire targets or tanks, artillery, etc.) and lighting mixture (such as barium nitrate 68%, aluminum powder 28%, shellac 4%)

(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 reflection performance of light is also very good, the purer aluminum, the better its reflection ability, so commonly used to manufacture high-quality mirrors, such as solar oven mirrors.

(10) Aluminum has sound absorption performance, sound effect is also better, so broadcasting rooms, modern large building indoor ceiling is also commonly used aluminum

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