The density of aluminum is very small, only 2.7 g/cm, although it is relatively soft, but it can be made into all kinds of aluminum alloys, such as aluminum, super-hard aluminum, rust-proof aluminum, cast aluminum and so on.
These aluminum alloy is widely used in aircraft, cars, trains, ships and other manufacturing industries.
In addition, space rocket, the space shuttle, the satellites use of a large number of aluminum and aluminum alloy.
For example, one frame approximately 70% of the supersonic aircraft aluminum and its alloy composition.
Also the extensive use of aluminum in the construction of ships, one large passenger ship with several thousand tons of aluminium content often.
After the conductivity of aluminum silver, copper and gold, while its exceptionally high conductivity copper was the only 2/3, but the density is only 1/3 of the copper, so conveying the same amount of electricity, only half of the copper the quality of aluminium wire.
The oxide film on aluminium surface not only have the ability of corrosion resistance And some insulation, so the aluminum in the electrical manufacturing industry, electric wire and cable industry and have wide applications in the radio industry.
Aluminum is a good conductor of heat, its thermal conductivity is 3 times times larger than iron, can be used for industrial aluminum manufacturing all kinds of heat exchangers, heat materials and cooking utensils and so on.
Aluminum has better ductility after the malleability of gold and silver (it) at 100 ° C ~ 150 ° C can be made thinner than 0.01 mm aluminum foil.
These aluminum foil is widely used in the packaging of cigarettes, candy, etc., Can also be made into aluminum wire, aluminum, and all kinds of aluminum products.
The surface of the dense aluminum oxide protective film Less susceptible to corrosion, is often used in the manufacture of chemical, medical equipment, refrigeration equipment, petroleum refining, oil and gas pipelines and so on.
Aluminium powder has a silvery sheen (general metal in powder form the color black), Commonly used to make paint, commonly known as silver, silver paint, in order to protect the iron from being corroded, and beautiful.
Aluminium gives off a lot of heat of combustion in oxygen and dazzling light, Often used in the manufacture of explosive mixture, If ANFO = aluminized ammonium nitrate explosives (ammonium nitrate, Charcoal powder, aluminum powder, A mixture of soot and other combustible organic matter), Combustion mixtures (such as the thermite bombs and artillery shells could be used to attack the goal of fire and tanks, Artillery, etc.) And mixtures (such as those containing barium nitrate 68% and aluminum powder 28%, shellac 4%).
Thermite used for melting refractory metal and welded rail and so on.
Aluminum also is used in the process of steelmaking deoxidizer.
Aluminium powder and graphite, Titanium dioxide (or other high-melting-point metal oxides) are mixed uniformly according to a certain ratio, Painted on the metal, cermet made by sintered at high temperature-resistant, it has an important application in rocket and missile technology.
Aluminum plate is also very good on the performance of the reflection of light, Reflected ultraviolet ray stronger than silver, aluminum, the more pure, the better its ability of reflection, and therefore are often used to manufacture high-quality mirrors, such as solar reflector and so on.
Aluminum has a sound-absorbing performance, the acoustics are better, so studios, large-scale indoor ceiling of aluminum.
Resistance to low temperature Aluminum at low temperatures, It's the contrary, the increase of the strength of brittle, so it is ideal for low-temperature device materials, such as the refrigerator, the freezer, the Antarctic snow vehicles, the oxidation of hydrogen production device.
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