Author:admin AddTime:2021-09-06
The production of hard ferrite requires not only high purity of raw materials and precise formulation composition, but also appropriate magnet grain size, uniform distribution, reasonable orientation and compact structure.
The sintered density of ferrite is related to the size of the residual magnetic induction. The denser the ferrite, the greater the residual magnetic induction. Although increasing the firing temperature can increase the magnet density, it will cause the magnetic phase crystal grains to grow, which is unfavorable to the magnetic induction intensity. The correct method is to introduce additives to speed up the sintering speed, increase the density, and effectively inhibit the growth of magnet grains. Commonly used additives are: Al2O3, AS2O3 and Bi2O3.
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