Ferrite magnet, a kind of permanent magnet, is composed of barium or strontium. It is hard, brittle and possesses lower magnetic energy compared with other permanent magnets. However, it has excellent corrosion and demagnetization resistance properties and very competitive price, which make it quite popular and are still widely used today. Ferrite magnet retains steady magnetic force long after the external magnetic field disappeared, so it is widely used in applications like voltmeters, generators, telephone sets, loudspeakers, televisions and microwave devices to generate constant and steady magnetic field.
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