Silicone electromagnetic shielding materials are used all over the world, especially in regions such as the U.S. Silicone electromagnetic shielding material is used to isolate electronic equipment from the presence of external magnetic fields. Often, the shielding methods of Faraday do not protect from slow varying magnetic fields. The magnetic shielding method with silicone electromagnetic shielding materials involves using a metal alloy with high magnetic permeability. This metal provides a path for the lines of the magnetic field to pass through. Closed containers are the best option. In some cases, the protection level can be up to 95%.
The effectiveness of silicone electromagnetic shielding materials depends on the permeability of the material. Materials with high permeability are ineffective for blocking electromagnetic fields. Most magnetic shields are made of several enclosures that reduce the magnetic field inside each. Depending on the thickness, these materials can be very effective in EMI shielding. For example, steel and aluminum are both highly conductive and are often used in EMI shielding.
Silicone electromagnetic shielding materials that block electromagnetic fields and radio waves include copper, aluminum, and steel. These materials are inexpensive and durable but are prone to oxidation and corrosion. As technology has advanced, steel shields have become less effective. Among these materials, nickel shields are the most reliable. These metals are malleable and have excellent electrical contact points. Some nickel alloys are also used, which are corrosion-resistant and have high conductivity.
In the U.S., the prevalence of around 700,000 construction companies has increased the usage of silicone electromagnetic shielding materials. The use of silicone electromagnetic shielding materials for shielding can prevent EMI from being transmitted to surrounding devices. Some materials can be used as EMI shields, such as sheet metal. Others use conductive paints, magnetic materials, or mesh metal screening. For example, a metal wall can be used as an EMI shield. It is not necessary to create a solid barrier for EMI shielding to prevent interference. The use of wire fencing and regular holes can also act as effective barriers.
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