Aluminum discs, this metal disc as thin as a cicada's wing, is changing your life in unexpected ways. Imagine: the can in your hand is stamped from a 22 cm diameter, 0.28 mm thick aluminum disc - the round design allows the can to evenly withstand the pressure of the beverage and avoid cracking at the corners.
When you charge your phone, the battery hides a thinner aluminum disc (only 0.015 mm), which is like a "current highway" that carries electrode materials and resists electrolyte corrosion... moreAluminum discs, this metal disc as thin as a cicada's wing, is changing your life in unexpected ways. Imagine: the can in your hand is stamped from a 22 cm diameter, 0.28 mm thick aluminum disc - the round design allows the can to evenly withstand the pressure of the beverage and avoid cracking at the corners.
When you charge your phone, the battery hides a thinner aluminum disc (only 0.015 mm), which is like a "current highway" that carries electrode materials and resists electrolyte corrosion. Scientists even use etching technology to carve micron-level pits on the surface to increase battery capacity by 15%.
From non-stick pans in the kitchen (heat conduction speed is 3 times that of iron) to solar backplanes on space satellites (withstanding extreme temperature differences of -170℃~120℃), aluminum discs are everywhere due to their lightweight, corrosion resistance and super ductility (1 gram of aluminum can be stretched into 3 meters of filaments!).
Making a perfect aluminum disc requires precise control: the aluminum ingot is melted and then hot-rolled and cold-rolled to the target thickness (accuracy of ±0.001 mm), and then precisely cut into a circle. If the thickness error exceeds the standard, stamping cans may waste tens of thousands of tons of aluminum, and the battery life will also shrink by 10%.
read more：https://aluminumstock.com/what-is-an-aluminum-circle/
