Knowra Aluminium Aluminium Aluminium is a lightweight, silvery chemical element with atomic number 13. Its low density, corrosion resistance, and formability make it widely used in alloys, packaging, construction, and electrical applications.
Aluminium oxide : Aluminium oxide is a hard, stable compound of aluminium and oxygen with the formula Al₂O₃. A thin layer of this oxide protects aluminium from further corrosion.
Duralumin : Duralumin is a strong, heat-treatable aluminium alloy containing copper and other elements. Its high strength-to-weight ratio made it an early aircraft-structural material.
Bauxite : Bauxite is the principal ore used to produce aluminium, consisting mainly of aluminium hydroxide minerals and impurities. Most aluminium begins as bauxite before chemical refining into alumina.
Steel : Steel is an iron-based alloy whose strength and low cost make it a dominant structural material. Steel is generally denser and stiffer, while aluminium often reduces weight and resists atmospheric corrosion.
Embodied energy : Embodied energy is the total energy required to produce and supply a material or product. Primary aluminium has high embodied energy because extraction requires extensive electrolysis.
Hall–Héroult process : The Hall–Héroult process extracts aluminium by electrolyzing alumina dissolved in molten cryolite. This energy-intensive process is the main method for producing primary aluminium.
Aluminium foil : Aluminium foil is thin rolled aluminium used as a flexible barrier to light, moisture, and gases. Its malleability and barrier properties make it effective in food and pharmaceutical packaging.
Hans Christian Ørsted : Hans Christian Ørsted was a Danish physicist and chemist who reported producing metallic aluminium in 1825. His experiment marked an early, impure isolation of the element.
Magnesium : Magnesium is a lightweight metallic element with atomic number 12, used in alloys and chemical applications. It is lighter than aluminium but typically more reactive and less corrosion-resistant.
Carbon footprint : A carbon footprint is the greenhouse-gas emissions associated with an activity, product, or organization. Electricity sources and process emissions strongly affect aluminium’s production footprint.
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