The use and application prospect of aluminum

The use and application prospect of aluminum

intro
Because the reserves of aluminum are very rich, and it has more excellent properties, which determines that aluminum is widely used in industry and life, below we will briefly introduce the application of aluminum according to its performance.

A. Low density
Aluminum alloy power cable Aluminum density of 2.7g/cm³ (iron, copper density of one-third), good ductility, conductive capacity of copper wire two-thirds, but the quality is only one-third, the price is cheaper, a large number of high voltage wire, cable, radio industry. The density of pure aluminum is relatively low, but the density and hardness of aluminum alloy have been greatly improved, and aluminum alloy has been widely used in aircraft, automobiles, trains, ships and other manufacturing industries. In addition, space rockets, space shuttles, artificial satellites also use a lot of aluminum and its aluminum alloys.

B. Thermal conductor
Aluminum is a good conductor of heat (thermal conductivity is 3 times greater than iron), and aluminum can be used in industry to manufacture a variety of heat exchangers, cooling materials and cookware.

C. Ductility
Aluminum has good ductility (second only to gold and silver), and can be made into aluminum foil thinner than 0.01mm at 100 ℃ ~ 150 ℃. 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.

D. Corrosion resistance
In the air, the surface of aluminum forms a dense oxide protective film, making it resistant to corrosion, so it is often used in the manufacture of medical devices, chemical reactors, refrigeration units, oil refining units, oil and gas pipelines.

E. Catalyst
Thermite is commonly used to melt refractory metals and weld steel rails. Aluminum is also used as a deoxidizer in the steelmaking process. Aluminum powder and graphite, titanium dioxide (or other oxides of high melting point metals) are evenly mixed at a certain ratio, coated on metal, and calcined at high temperature to make high temperature resistant cermet, which has important applications in rocket and missile technology.

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

G. Decorative
Aluminum powder has a silver-white luster (the color of general metal in powder form is mostly black), commonly used to do paint, commonly known as silver powder, silver paint, to protect iron products from corrosion, and beautiful.

H. Low temperature resistance
Low temperature resistance, aluminum at low temperatures, its strength increases without brittleness, so it is an ideal material for low temperature devices, such as cold storage, freezer, Antarctic snow vehicles, hydrogen oxide production units.

I. Reflectivity
Aluminum plate is also very good at reflecting light, reflecting ultraviolet light is stronger than silver, the more pure aluminum, the better its reflection ability, so it is commonly used to manufacture high-quality mirrors, such as solar stove mirrors.

J. Additives
Some food additives also contain metal aluminum like alum, leavening agent, starter culture, etc., in some fried dough sticks, steamed bread, twist, verdicts and some puffed food (potato chips) are also used.

K. Sound absorption effect
Aluminum has sound absorption performance, and the sound effect is also good, so the broadcast room and the ceiling of the modern large building are also made of aluminum. Many doors and Windows in the family use aluminum alloy frame is also for this consideration.

The application prospect of aluminum
At present, there are overcapacity and insufficient utilization rates in the aluminum industry, and the prospects of the domestic aluminum industry are difficult to be optimistic in the short term. However, because aluminum is very rich in the Earth's crust and has many advantages over other metal elements, aluminum will still have an extremely wide range of application prospects in the future. For example, car manufacturers are currently exploring the use of aluminum alloy in large areas instead of steel, so that the weight of the car is lighter. With the progress of technology, aluminum alloy products will not only grow rapidly in traditional application fields such as aerospace, transportation, electronic power, and construction, but also grow rapidly in new areas.