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Alumina - AL

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Keterangan

The ancient Greeks and Romans used alum (potassium aluminium sulfate) in medicine as an astringent, and in dyeing as a mordant. Sir Humphry Davy originally proposed the name alumium for the element, which was undiscovered at the time. He later changed the spelling to aluminum and it soon changed again to aluminium. Today the aluminum spelling predominates in the US and Canada whereas aluminium is preferred in the UK and much of the rest of the world.

Aluminium oxide, alumina, occurs naturally as corundum and emery, and is used in glass-making and refractories. The precious stones ruby and sapphire contain aluminium with very small amounts of specific impurities.

Nama lain (trademark, branding etc.)

Aluminium. Hliník,Aluminij, Aluminium, Aluminium - r, Alluminio, Aluminium, Alumínio, Алюминий, Alumínio, Aluminium

Spesifikasi Produk

Overview of Aluminum
Atomic Number 13
Group 13
Period 3
Series  Metals
Relative Atomic Mass (12C=12.000)  26.982
Boiling Point 2740K 2467°C 4473°F
Melting Point 933.4K 660.25°C 1220.45°F
Density/kg m-3  2698 (293K)
Ground State Electron Configuration  [Ne]3s23p1
Electron Affinity(M-M-)/kJ mol-1  -44
Discoverer Hans Christian Oersted
Discovery Location Copenhagen Denmark
Discovery Year 1825
Name Origin

Aplikasi

Aluminium is used in an enormous variety of products, due to its particular properties. It has low density, is non-toxic, has a high thermal conductivity, has excellent corrosion resistance, and can be easily cast, machined and formed. It is also non-magnetic and non-sparking. It is the second most malleable metal and the sixth most ductile. It is therefore extensively used for kitchen utensils, outside building decoration and in any area where a strong, light, easily constructed material is needed.

The electrical conductivity of aluminium is about 60% that of copper per unit area of cross-section, but it is nevertheless used in electrical transmission lines because of its low density. Alloys of aluminium with copper, manganese, magnesium and silicon are of vital importance in the construction of aeroplanes and rockets. Aluminium, when evaporated in a vacuum, forms a highly reflective coating for both light and heat which does not deteriorate as does a silver coating. These aluminium coatings are used for telescope mirrors, in decorative paper, packages and toys, and have many other uses.

Aluminium is used in an enormous variety of products, due to its particular properties. It has low density, is non-toxic, has a high thermal conductivity, has excellent corrosion resistance, and can be easily cast, machined and formed. It is also non-magnetic and non-sparking. It is the second most malleable metal and the sixth most ductile. It is therefore extensively used for kitchen utensils, outside building decoration and in any area where a strong, light, easily constructed material is needed.

The electrical conductivity of aluminium is about 60% that of copper per unit area of cross-section, but it is nevertheless used in electrical transmission lines because of its low density. Alloys of aluminium with copper, manganese, magnesium and silicon are of vital importance in the construction of aeroplanes and rockets. Aluminium, when evaporated in a vacuum, forms a highly reflective coating for both light and heat which does not deteriorate as does a silver coating. These aluminium coatings are used for telescope mirrors, in decorative paper, packages and toys, and have many other uses.

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