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The Main Raw Material Of Ferrite Segment Magnet And Its Application Range
Aug 09, 2017

The main raw material of Ferrite Segment Magnet and its application range
The main raw materials of Ferrite Segment Magnet include BaFe12O19 and SrFe12O19. Made of ceramic technology, the texture is relatively hard, is a brittle material, because the Ferrite Segment Magnet have good temperature resistance, low price, moderate performance, has become the most widely used permanent magnet.
Classification of magnetic materials
The ferrite is a ferritic metal oxide. In terms of electrical properties, the ferrite has a much higher resistivity than metal and alloy magnetic materials, and has higher dielectric properties. The magnetic properties of ferrite also exhibit high permeability at high frequencies. Thus, ferrite has become a widely used non-metallic magnetic material in the field of high frequency and weak electricity.
Ferrite is a mixture of various iron oxide composed of sintered magnetic metal oxide, the main raw materials are iron oxide, barium carbonate or strontium carbonate.
Since the magnetic energy stored in the ferrite unit volume is low and the saturation magnetization is also low (usually only 1/3 to 1/5 of pure iron), it limits its low frequency and strong electrical energy Application of high power field.
Ferrite Segment Magnet are widely used in automotive motors (wipers, start, heater, fuel pump, and seat motor), exercise car magnetically controlled and massage chairs. SmCo, aluminum and nickel cobalt is mainly used for instruments, motors and some of the work environment have special requirements on the mechanical equipment. It can be said that Ferrite Segment Magnet have become one of the essential materials of the electronics industry indispensable.
Ferrite Segment Magnet suitable for storage in a ventilated and dry room, acidic, alkaline, organic solvents, water, high temperature and humidity environment easy to make the magnet rust, the coating off the magnet powder demagnetization. For the unplasticized products should pay attention to, storage can be appropriate oil rust, which is our proposed NdFeB magnet surface corrosion treatment of the main reasons.
Ferrite Segment Magnet in the final stage of sintering, usually the volume of material migration, the migration of such volume: plastic flow, grain boundary diffusion, viscous flow, volume diffusion, the flow of material on the surface of the particles caused by sintering of the surface of the material migrate.
The above changes depend on the sintering stage, the temperature, the particle size and the material composition, although the above process is not easily observed, but it is present. This phenomenon was observed when the sintered magnet film was dynamically observed using a JEM-lOOOkV ultrahigh-voltage electron microscope.
The surface migration and volume migration of the material is the sintering process, there are two types of material migration mechanism. The migration of substances caused by the flow of matter on the surface of the particles is called surface migration of sintered substances such as surface expansion and evaporation - agglomeration.
Surface diffusion and evaporation - cohesion in the control of sintered matter surface migration are two more important components of the Zai part. Volume diffusion from the surface source to the surface well is possible. The volume migration of the material during sintering can cause a change in the basic size of the sintering body. Most of the bulk movement of the material in the final stage of the sintering process. Volume diffusion, grain boundary diffusion, viscous flow, and plastic flow are all within the range of volume migration mechanisms of matter. The significance of the sintering mechanism is seen from the material, the powdery degree, the sintering stage, the sintering temperature, and some other process parameters.

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