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Sintered ferrite magnets are composed of barium or strontium ferrite and manufactured with ceramic processing technology. They are very hard and brittle which requires professional and specialized machining techniques. Popular for a wide range of low cost applications.

A special form of fully dense sintered ferrite magnets is produced using flexible binder for the ferrite powder, These material are commonly referred to as "Flexible Magnets".

Key Benefits

• Inexpensive at medium to low magnetic strength.
• Can be magnetized with multiple poles on one or both pole surfaces.
• High coercive force.
• Working temperature is up to 450⁰C.
• Good resistance to demagnetization.
• Does not rust, no surface treatment required.

Key Challenge

• Very hard and brittle
• Limited to simple size
• Expensive mold charge
• Properties degrade linearly with temperature, at 3500F,about 75% of room temperature magnetization is retained, and at 550⁰F, about 50% is retained

Quick Facts

Density:4.6~5.0g/cm3
Saturation magnetizing field required: about 10KOe
Manufacture method: dry press and wet press. The dry process is used for isotropic and anisotropic material, and the wet method applies only to the production of anisotropic material.
Shape available: blocks, bars, discs, rings, arc segments, etc.
Grade available: C1 to C11, Br from 230MT to 430MT