Magnetic Field Shielding Materials

There are many types of shielding materials their alloy composition is a highly guarded secret based on years of extensive research and application.

Magnetic field shielding materials.

Companies that provide magnetic shielding materials typically offer a version of mumetal and some other proprietary alloys. Magnetic shielding is a process that limits the coupling of a magnetic field between two locations. Common sheet metals for shielding include copper brass nickel silver steel and tin. For most magnetic shielding applications a high permeability material known throughout the industry as mumetal or hymu 80 is the magnetic shielding material of choice.

The thinner 0 004 thick material is easy to trim with scissors and shape by hand. Typical materials used for electromagnetic shielding include sheet metal metal screen and metal foam. Co netic aa netic s3 6 and mumetal are three unique shielding materials provided by magnetic shield corp. Unlike other magnetic materials mcl61 is flexible yet sturdy even at small bending radii.

Magnetic field shielding film mcl61 this magnetic field shielding material is made from an amorphous cobalt alloy which makes it perfect for shielding against low frequency magnetic fields high frequency fields and low frequency electric fields. Formed into alloys and subjected to annealing processes however permeability can reach levels useful for magnetic shielding. The magnetic field lines are strongly attracted into the shielding material. Magnetic permeability of non specialized base materials is typically low around 100 for 99 pure nickel for example.

They are also very expensive. Magnetic shielding materials used in electronic enclosures dissipate the electromagnetic energy converting it to heat. Yes there are some specialized materials specifically made for magnetic shielding. The purpose is most often to prevent magnetic fields from interfering with electrical devices.

Choose a material that is thick and has electrically conductive properties and high permeability. This can be done with a number of materials including sheet metal metal mesh ionized gas or plasma. Absorption loss is the primary means to shield low frequency magnetic fields.