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2 year ago

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3 year

Product details

Speaker Magnet

Applications

Ferrite magnet, sometimes referred to as ceramic magnet, because of the production process, is the least expensive class of permanent magnet materials. This material became commercially available in the mid 1950s, and has since found its way into countless applications including arc shaped magnets for motors, magnetic chucks, and magnetic tools.

The raw material, iron oxide, for these magnets is mixed with either strontium or barium and milled down to a fine powdered form. The powder is then mixed with a ceramic binder and magnets are produced through a compression or extrusion molding technique that is followed by a sintering process. The nature of the manufacturing process results in a product that frequently contains imperfections such as cracks, porosity, chips, etc. Fortunately, these imperfections rarely interfere with a magnet’s performance.

To enhance a ceramic magnet’s performance, the ferrite compound may be biased by a magnetic field during the pressing process. This biasing induces a preferred direction of magnetization within the magnet, significantly reducing its performance in any other orientation. Consequently, ceramic magnets are available in both oriented (anisotropic ferrite magnets) and non-oriented (isotropic ferrite magnets) grades. Because of its lower magnetic properties, the isotropic grade of ferrite is typically utilized where complex magnetization patterns are required, and in process biasing would be cost prohibitive.

Ceramic magnet is inherently brittle, and it is highly recommended that they NOT be utilized as structural elements in any application. The thermal stability is the poorest of all the magnetic families, but they may be utilized in environments up to 300 Deg C (570 Deg F). The dimensional repeatability of as pressed components is difficult to control, consequently, components requiring tight tolerances necessitate secondary grinding operations to assure conformity.

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HU NAN YUBANG MAGNETIC MATERIAL CO.,LTD

Audited supplier

3 year

Main Product: Permanent Ferrite Magnets , Isotropic Ferrite Magnets, Anisotropic Ferrite Magnets, Anisotropic Ferrite Magnet Rotor, Isotropic Multipole Magnetic Rotor, Sintered Neodymium Magnets

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