What Are the Characteristics of Using Ferrite Magnets?
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What Are the Characteristics of Using Ferrite Magnets?

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Ferrite magnets are also divided into anisotropy (anisotropy) and isotropy (isotropy). Isotropic sintered ferrite permanent magnet materials have weak magnetism, but can be magnetized along different magnetic field directions; Anisotropic sintered ferrite permanent magnet materials have strong magnetism, but can only be magnetized along the direction of the magnet in the predetermined magnetization direction.

  • What are the characteristics of using ferrite magnets?

  • What is a ferrite permanent magnet?

  • What is a soft ferrite magnet?

What are the characteristics of using ferrite magnets?

All available isotropic and anisotropic ferrite grades.

Suitable for large capacity applications.

High operating temperature, usually up to 300 ℃

High corrosion resistance, no corrosion in water.

Suitable for motors, loudspeakers, pliers and blade switches.

Certificates of conformity, MSDS and PPAP are available.

Ferrite Magnets

What is a ferrite permanent magnet?

There are barium ferrite magnets (BaO 6Fe2O3) and strontium ferrite magnets (SrO 6Fe2O3). It has high resistivity, belongs to semiconducting type, small eddy current loss and large coercive force. It can be effectively used in large space magnetic circuit, especially in small generators and motors. It does not contain nickel, cobalt and other precious metals. it has abundant raw materials, simple process and low cost, and can replace alnico permanent magnetic materials. 

The maximum magnetic energy product (b+h) m is lower and larger than that of metal magnets at the same magnetic energy. It has poor temperature stability, brittle texture, and is not resistant to impact and vibration. It is not applicable to measuring instruments and magnetic devices with accuracy requirements. The products of permanent ferrite magnets are mainly anisotropic series. It can be used to manufacture permanent magnet ignition motors, permanent magnet motors, permanent magnet concentrators, permanent magnet lifting heads, magnetic stop bearings, magnetic separators, loudspeakers, microwave devices, magnetic therapy tablets, hearing aids, etc.

What is a soft ferrite magnet?

Ferrite magnets are composed of manganese ferrite magnets (MnO Fe2O3), zinc ferrite magnets (ZnO Fe2O3), nickel zinc ferrite magnets (Ni Zn Fe2O4), manganese magnesium zinc ferrite magnets (Mn Mg Zn Fe2O4), etc. The resistivity is much higher than that of metal magnetic materials, and has higher dielectric properties. Therefore, ferrite magnets with ferromagnetism and ferroelectricity as well as ferromagnetism and piezoelectricity have emerged. It has higher magnetic permeability than metal magnetic materials (including iron nickel alloy and aluminum silicon iron alloy) at high frequencies, and is suitable for working at frequencies ranging from several thousand Hz to several hundred MHz.

The processing of ferrite magnets belongs to the general ceramic process, which is simple, saves a lot of precious metals and has low cost. The saturation flux density bs of ferrite magnet is low, which is generally only 1/3~1/5 of iron. The low magnetic energy stored in unit volume of ferrite magnet limits its application in low frequency, high power, high power and other magnetic fields that require high magnetic energy density. It is more suitable for high frequency, low power consumption and low current applications. Ni Zn ferrite magnets can be used as antenna poles and cores of radio IF transformers, and Mn Zn ferrite magnets can be used as cores of line output transformers of TV receivers. In addition, soft ferrite magnets are also used for inductors and filter cores of communication lines. In recent years, it has also been used as a high-frequency magnetic recording sensor (magnetic head).

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