Aluminum foil tape or copper foil tape, which is better at shielding?
I should say they have equal shielding abilities. But as aluminum is more likely to oxidize than copper and not easy to be soldered, copper foil tape is preferred in most of the cases. Electromagnetic shield means using elements made of conductive or ferromagnetic materials to screen at the end of stator core of a large turbo-generator, reducing additional loss and local heating in parts caused by flux leakage at the end of stator winding. In terms of communication, screening is to segregate two spaces to prevent electric field, magnetic field, and electromagnetic wave of one area from reacting to or radiating the other one. To be detailed, screening will encompass interference source that influences components, circuit, assembling, cable or the overall system.
