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Characteristics Of Ferrite Hook Magnets 25x7mm Small-size: 25x7mm is standard small-size in the family of ferrite hook magnets. Thread: M4 threaded steel hooks are used on the ferrite cup magnet for hanging.

This is a kind of permanent magnet made of SrO or Bao and Fe2O3 as raw materials by sintering. It is called ferrite permanent magnet. Because its process is similar to that of ceramics, it is also called ceramic permanent magnet. Ferrite materials are very brittle and require special processing techniques to produce specific shapes and sizes.

The flat circular hard magnets made out through molding and sintering with raw material of SrO or BaO and Fe2O3 called sintered ferrite (ceramic) disc magnet, its surface is in black color. The round shape is one of the most common shapes of ferrite magnets, which has a narrow range of magnetic energy product.

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