Aluminium Presentation Essay Example for Free

Aluminium Presentation endeavorIve done my presentation on Aluminium and will be talking to you about its properties, where its found and its uses and why its the best temporal for these purposes.Aluminium. Chemical symbol Al. Atomic weight approx 27 Atomic number 13 and electronic configuration 2-8-3.Appearance- pure aluminum is a shiny silvery white sensible. Down to the molecular(a) level aluminum has a polycrystalline structure where the surface has cooled from different argonas of the material where. Where these areas meet are called the grain boundary. This structure gives aluminium its many properties.Density The first thing you notice about aluminium is its relatively lightweight. It has a density of 2,7g/mm3. This is about 1/3 the weight of a piece of sword the same size.Resists Corrosion like many other metals aluminium is very reactive in style and thus a fine layer of aluminium oxide is created on the surface. This provides provides a highly effective obstr uction to the ravages of air, temperature, moisture and chemical attack. 0.000000635cmHighly reflective Free electrons in the metal absorb the light vigor then immediately re emit it.emits 90* of the light that it absorbs. This would not happen if free electrons wernt present. pliable Aluminium tramp be bent and shaped extremely easily. This is because of it polycrystalline structure. Along the grain boundaries of the material dislocations in the atoms occur. It is the movement of these dislocations that makes this metal very ductile. This is good for shaping aluminium provided very stinky for its strength.Strength like many other of aluminiums properties it depends on the purity of the material 99.996 per cent pure aluminium has a tensile strength of about 49 megapascals (MPa), Unlike materials much(prenominal) as steel, aluminium gets stronger as temperature drops. rising to 700 MPa following alloying and suitable heat treatment.Conductance aluminium is one of the best co nductors of electricity. Because it is a metal it ontains roughly a soup of free raceing electrons which make it very easy for a current to flow through it. Aluminium itself conducts about 63% of that of copper of the same mass.Aluminium is also a cracking conductor of heat conducting about 220 WattsOccuranceAluminium is the most abundant metal in the earths crust. Only the non metal elements type O and silicon are to a greater extent abundant. The largest deposits of aluminium are found in Australia, Guinea and air jacket Indies. Aluminium does not occur in its pure form but as either an aluminium silicate or as bauxite which consists of aluminium oxide and commonly iron oxide also. As seen in the picture the aluminium ore is a redish colour this is ca utilise by the iron ore mix. Bauxite is produced through chemical weathering of rocks in tropical climate.ExtractionThe method without delay used for aluminiums commercial production is the electrolysis. An iron pot, lined with carbon, is charged with cryolite and heated to about 800C by the electric current. For the electrolysis, a bundle of carbon rods is used as the anode, while the pot itself forms the cathode. The oxygen liberated combines with the carbon of the anode to form carbon dioxide, while the aluminium falls to the bottom of the vessel. More aluminum oxide is added and the process continued, the molten metal being drawn off from time to time.UsesAircrafts Mainly because of its lightweight. This feature is utilize by aircraft and jakes cut the weight down by up to 5 tonnes. This means planes can fly fast and be more economical. This also applies to all transportation allowing increased loading energy also. Usually it isnt actually pure aluminium because of its poor strength but instead alloys of aluminium which can be as strong as 700 Mpa.Buildings Aluminium is used in construction mainly because of its erosion resistance. Its is also a very easy material to shaped and mould making it ide al for the uses in constructionElectrics Aluminium is a very economical material as an electric conductor and is astray utilized in power transmission cables. Aluminium only has 60% conductivity of copper but weighs a 1/3 as much making it ideal for large power cables. warmness aluminium is about 3 times as thermal conductive as steel. This feature is used in cooking utensils, engines, air conditioners and it is also being used in energy saving equipment such as solar cells.Reflective Because aluminium is reflective of most electric, heat and light waves it is being more commonly used in the insulation of homes.Harsh conditions Unlike steel which gets brittle in refrigerated conditions aluminium get stronger making it the perfect material to use in harsh conditions. Aluminium is like a shot being used on snow-mobilesCans aluminium is a non toxic material, smooth, easily washable and is hygienic because no germs an grow on it. Also because malleability it can be shaped into a ny shaped or form making it ideal for packagingBecause of aluminiums low melting point approx 600 C it is the ideal material in this age of energy and resource saving to recycle.