Prevent electromagnetic interference, electronic components, shielded by copper, or made of silicon steel shield? Don't say silver.
Shielding foreign electromagnetic field, it is generally necessary to choose conductive properties of very good metal, so it is recommended to choose copper.
Silicon steel sheet can play the role of magnetic shielding, but the effect is poor.
Silicon steel sheets are generally used to strengthen the magnetic field because it is easily magnetized. The silicon steel sheet for magnetic shielding, the need to cover sheet shaped, the magnetic flux through the silicon steel sheet flow. But magnetic shielding is usually bad for general electromagnetic wave, and the shielding effect is very good for low frequency electromagnetic wave and static magnetic field.So, of course, copper should be chosen
Here you have to understand, electrical shielding, the use of the conductor of the electric field shielding, and electromagnetic waves, electric field and magnetic field are interdependent, and naturally shielded the electric field, magnetic field can not be imported. The electrostatic field can also be shielded, but the static magnetic field cannot be shielded by a good conductor.
