Melting point of aluminum
What is the melting point of aluminum? And what is its nature?
The melting point of aluminum is 580-740 degrees. Aluminum is a silver-white light metal with a soft density of 2.7g/cm 3, a melting point of 660.4 C and a boiling point of 2467 C. Aluminum and its alloys have many excellent physical properties and are widely used.
Aluminum reflects light well, reflecting ultraviolet rays are stronger than silver. The more pure aluminum is, the better its reflecting ability is. The combination of vacuum aluminized film and polycrystalline silicon film becomes a cheap and lightweight solar cell material. Aluminum powder can maintain silver lustre, commonly used to make coatings, commonly known as silver powder.
Pure aluminum has good electrical conductivity, second only to silver and copper. It can replace part of copper as conductors and cables in the power industry. Aluminum is a good conductor of heat. Aluminum can be used in industry to make various heat exchangers, heat dissipating materials and civil cooking utensils.
Aluminum has good ductility, can be drawn into fine wire, rolled into various aluminum products, can also be made into thin aluminum foil 0.01 mm, widely used in packaging cigarettes, candies and so on.
Aluminum alloy has some better properties than pure aluminum, which greatly widens the application scope of aluminum. For example, pure aluminum is soft, when a certain amount of copper, magnesium, manganese and other metals are added to aluminum, the strength can be greatly improved, almost equal to steel, and the density is small, not easy to rust, widely used in aircraft, automobiles, trains, ships, satellites, rockets manufacturing. Some steels are as brittle as glass when the temperature drops to - 196 C, while some aluminum alloys increase in strength and toughness, so they are cheap and lightweight cryogenic materials that can be used to store liquid oxygen and hydrogen in rocket fuels.
1. Aluminum and inactive metal oxides (mainly refractory metal oxides such as Cr2O3, V2O5 and Fe2O3) mixtures, are known as thermites, aluminum in the reaction as a reductant. During the reaction, a large amount of heat is released to melt the reduced metal into liquid.
Aluminum oxide is often used in industry to restore some metal oxides.
We call this kind of reaction thermite reaction. Workers often mix aluminum powder with iron oxide and ignite it when welding rails. Because the reaction gives off a lot of heat, the replaced iron flows out in molten form. Melt molten iron into the gap of the rail, and then cool the rail together.
2. aluminum can react with concentrated sulfuric acid or nitric acid when heated.
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