Rare things are expensive. 100 years ago, aluminum was called "silver gold", which is more precious than gold. French emperor Charles Louis Napolé on Bonaparte, in order to show his wealth and dignity, ordered officials to make a crown more precious than a gold-aluminum crown for himself. He wore an aluminum crown and proudly accepted the worship of officials, which was a sensational news. When Charles Louis Napolé on Bonaparte held a grand banquet, only he used a set of aluminum tableware, and others could only use gold and silver tableware.
Shtal, the founder of phlogiston theory, first discovered that alum contains a substance different from ordinary metal. British chemist David tried to obtain this unknown metal by electrolysis, but failed. 1824, Danish scientist Ernest got some impure aluminum, but his experimental results were published in an unknown Danish journal, which did not attract the attention of the scientific community.
During 1827, when Weller visited Oest de in Danish capital, Oest de told Weller about the experimental process and results of preparing metallic aluminum. After Weller returned home, he immediately repeated Ernest's experiment. After 18 years of unremitting efforts, he finally made a pin-sized aluminum. 1854, French chemists improved Weiler's method and successfully prepared aluminum ingots with sodium as reducing agent. However, due to the high price of sodium, the cost of aluminum produced with sodium as reducing agent is much higher than that in Huang Jingui. De Ville realized the industrial production of aluminum. Although it was expensive, he cast an aluminum commemorative medal with Willer's name, head and the words "1827" on it to commemorate Willer's historical contribution to the preparation of aluminum. De Ville presented this medal to Wheeler as a tribute.
1886 is another milestone in the history of aluminum. This year, American college student Hall and French college student Arrow independently developed the production method of electrolytic aluminum. In Alcoa's showcase, electrolytic aluminum particles made by Hall for the first time are also displayed. On the campus of Hall's alma mater, an aluminum statue of him still stands. French college student errol also made aluminum almost at the same time. Since then, the output of aluminum has increased dramatically.
At the beginning of the 20th century, jewelers lost interest in aluminum, but aluminum was favored by the whole industry. Because aluminum alloy has the advantages of low density, high hardness, high strength and good electrical and thermal conductivity, it is widely used in aviation, chemical industry, transportation, construction, national defense and other industries, and it is becoming more and more common in household necessities, and gradually becomes another metal that has a significant impact on human development after iron. Since 19 19, aluminum alloys have been used in aircraft manufacturing. Since then, aluminum has been closely linked with aviation, so some people regard aluminum as a "winged society".