Ceramic / Ferrite Magnets, Sintered Hard Ferrite Permanent Magnet, Injection Bonded Ferrite Magnets, isotropic and anisotrpic magnets, Hard and Soft Ferrite Magnet, Ferrite Cores, Custom Sintering Ceramic Magnets China Supplier & Factory
Ferrite Magnets, also known as ceramic magnets, are made of a composite of Iron oxide and barium carbonate (BaCO3) or strontium carbonate (SrCO3). Widely available since the 1950’s, this material is commonly available and at a lower cost than other types of materials used in permanent magnets. Ceramic magnets are made using pressing and sintering. Sintered magnets are a type of ceramic composed of the compressed powder of the alloy material being used. Sintering involves the compaction of fine alloy powder in a dry and then fusing the powder into a solid material with heat. While the sintered magnets are solid, their physical properties are more similar to a ceramic and are easily broken and chipped.
Ferrite magnets are brittle and hard generally requiring diamond wheels to grind and shape. These magnets come in a number of different grades.
Ceramic is an isotropic grade with equal magnetic properties in all directions. Ceramic grades 5 and 8 are anisotropic grades. Anisotropic magnets are magnetized in the direction of pressing. The anisotropic method delivers the highest energy product among ceramic magnets at values up to 3.5 MGOe ( Mega Gauss Oersted).
Ceramic Ferrite magnet is one of the most cost-effective magnetic materials. It has a fair to good resistance toward corrosion and it can operate in moderate heat. Ceramic Ferrite magnets are low energy products and they are usually used in assemblies containing mild steel.
Ceramic magnets are manufactured using powder technology techniques. The primary raw material – ferrite – is made by using iron oxide and strontium carbonate. Ferrite Magnet represents more than 75 percent of world magnet consumption (by weight). Ferrite Magnet is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.
Ceramic magnets have a good balance of magnetic strength, resistance to demagnetizing and economy. They are the most widely used magnets today.
Beneficial characteristics of ceramic magnets include their low cost, high coercive force, resistance to corrosion, and high heat tolerance. Drawbacks include their low energy product or “strength”, low mechanical strength, and the ferrite powder on the surface of the material which can rub of and cause soiling.
1) Cheapest magnet material
2) Good anti-corrosion performance, no surface treatment needed.
3) Excellent temperature stability
4) Best choice for industrial application
5) All shapes can be customized
6) provide isotropic and anisotrpic
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