What are the types of Shielding Material?

What are the types of Shielding Material?

According to different shielding purposes, shielding bodies can be divided into three types: electrostatic shielding bodies, magnetic shielding bodies and electromagnetic shielding bodies. The materials and functions of the three shields are as follows: 1. Electrostatic shielding body: made of inverse magnetic materials (such as copper, aluminum), and connected to the ground. The role of the electrostatic shield is to terminate the electric field on the metal surface of the shield and transfer the charge to ground.
2. Magnetic shielding body: It is made of strong magnetic material (such as steel) with high magnetic permeability, which can limit the magnetic field lines in the shielding body.
3. Electromagnetic shielding body: generally made of inverse magnetic materials (such as copper, aluminum), mainly used to suppress the influence of high-frequency electromagnetic fields, so that the interference field forms eddy currents in the shielding body and at the interface between the shielding body and the protected space Reflection is generated on the surface, thereby greatly weakening the field strength value of the interference field in the protected space and achieving the shielding effect. Sometimes in order to enhance the shielding effect, a multi-layer shield can also be used. The outer layer is generally made of materials with high electrical conductivity to increase the reflection effect, while the inner layer is made of materials with high magnetic permeability to increase the eddy current effect.

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