Aluminium History
Aluminum used very widly in our life, so how was aluminum discovered ?
The English name of aluminium is Aluminium, and this English name is made from alum, which is a compound of sulfuric acid, KAl (SO4), 2 ? 12H2O. In fact, in prehistoric times, humans had begun to use Al2O3 ? 2SiO2 ? 2H2O containing aluminum compounds.Known, aluminum content in the earth's crust is second only to oxygen and silicon, is arranged in the third, mineral resources are abundant, but due to the oxidation of aluminum compounds are weak, so want to make aluminum reduction from the compound is not easy, so can't to separate the metal aluminum.
Chemists in Denmark oster using dilute potassium amalgam react with aluminium chloride isolated for the first time after not pure aluminum, German chemist in 1827 wu le repeated oster experiments, and constantly changing the methods of making aluminum.In 1854, German chemist d 'urville used sodium to replace potassium to make aluminum ingots.For a period of time, aluminum became the treasure of the imperial aristocracy.French emperor napoleon iii used aluminum fork at the banquet, the king of Thailand have used aluminum chain, exposition in Paris in 1855, it exhibited with jewel in the crown and written on the label is the "silver" from the clay.In 1889, mendeleyev also received vases and cups made of aluminum alloy from the London chemical society.
Until the mid 19th century, the aluminium price was starting fallen, and it was sharply fallen. First as Siemens 1870 s after improvement, the generator with cheap electricity, but also because of Heroult in France and the United States, c. m. Hall, respectively, in 1886 developed the dissolved alumina in cryolite (Na3AlF6) in electrolytic method. This pioneering contribution let aluminium acquired the chance of large scale manufacturering, as well as settled today world's industrial methods of electrolytic aluminium, make the various kinds of aluminium products entered into thousands of households.
