铁氧体材料由于其优异的磁性，已被广泛用于电机磁芯和磁鼓。它们由两个过程制造，一个成型过程和一个烧结过程。烧结过程不仅会导致材料收缩，而且无法产生成型过程所需的均匀密度。通常，烧结后的复杂形状工件需要额外的加工工艺，因为只有烧结工艺不适合获得所需的形状和尺寸。

Ferrite materials have been widely used for cores of motors and magnetic drums owing to an excellent magnetic property. They are manufactured by two processes, a forming and a sintering process. The sintering process not only leads to a shrinkage of the material but also is unable to produce the uniform density required for the forming process. Typically the additional machining processes are necessary for the complex shaped workpiece after sintering, because only sintering process is not suitable for attaining desired shapes and dimensions.