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A ferrite is one of a family of iron oxide -containing magnetic ceramic materials. They are ferrimagnetic, meaning they are attracted by magnetic fields and can be magnetized to become permanent magnets.
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The most familiar ferrite, known since biblical times, is magnetite (lodestone, or ferrous ferrite), Fe (Fe 2 O 4). Ferrites exhibit a form of magnetism called ferrimagnetism (q.v.), which is distinguished from the ferromagnetism of such materials as iron, cobalt, and nickel.
TDK Product Features. These core magnets have been oxide sintered with advanced microstructure control technology using powder metallurgy techniques, are not affected greatly by demagnetizing fields, and have excellent practical properties that outperform metallic magnets (Al-Ni-Co) and can be mass-produced at a high cost-performance ratio.
The ferrite is a new type of non-metallic magnetic material developed in the 1940s. It is a metal oxide with ferrimagnetism. In terms of electrical characteristics, the resistivity of ferrite is much larger than that of a single metal or alloy magnetic material, and it also has higher dielectric properties.
Ferrite magnets are permanent magnets mainly made of SrO or BaO and Fe2O3. Compared with other permanent magnets, ferrite magnets are hard and brittle and have lower magnetic energy. However, they are not easy to demagnetize, not easy to be corroded, and their production process is simple, and their price is low.