High Quality Arc Ferrite Magnet for Motor

High Quality Ferrite Arc Magnet for Motor

The most common hard ferrites are:

Strontium ferrite, SrFe₁₂O₁₉ (SrO·6Fe₂O₃), used in small electric motors, micro-wave devices, recording media, magneto-optic media, telecommunication and electronic industry. Strontium hexaferrite (SrFe₁₂O₁₉) is well known for its high coercivity.due to its magnetocrystalline anisotropy. It has been widely used in industrial applications as permanent magnets and, because they can be powdered and formed easily, they are finding their applications into micro and nano-types systems such as biomarkers, bio diagnostics and biosensors.

Barium ferrite,BaFe₁₂O₁₉ (BaO·6Fe₂O₃), a common material for Permanent Magnet applications. Barium ferrites are robust ceramics that are generally stable to moisture and corrosion-resistant. They are used in e.g.  loudspeaker magnets and as a medium for magnetic recording, e.g. on magnetic stripe cards.

characteristic 

The powder metallurgy method has low remanence and low recovery magnetic permeability. High coercivity, strong anti-demagnetization ability, especially suitable for dynamic working conditions of magnetic circuit structure. Hard and brittle material, can be used for emery tools for cutting processing. The main raw material is oxide, so it is not easily corroded. Operating temperature :-40℃ to +200℃. 

Ferrite magnets are divided into anisotropic (heterotropic) and isotropic (isotropic). The magnetic properties of the isotropic sintered ferrite materials are weak, but they can be magnetized in different directions of the magnet. Heteromorphic sintered ferrite permanent magnet materials have strong magnetic properties, but only along the intended direction of magnetization of the magnet. 

Physical property 

In the actual production of ferrite magnets, raw materials with good chemical composition may not be able to obtain ferrite magnets with good properties and microstructure sometimes, because of the influence of physical properties. The listed physical properties of iron oxide include mean particle size APS, specific surface area SSA, and loose density BD. As iron oxide accounts for about 70% in the formula of manganese zinc ferrite magnet, its APS value has a great influence on the APS value of ferrite magnet powder. Generally speaking, the APS value of iron oxide is small, and the APS value of ferrite magnet powder is also small, which is conducive to speeding up the speed of chemical reaction. However, the APS value should not be too small considering that the fine particle of powder is not conducive to post-process pressing and sintering easy crystallization. Obviously, when the APS value of iron oxide is too large, only the diffusion reaction of spinel phase can be carried out in the pre-firing process due to the large particle size, and the grain growth process can not be further carried out. This inevitably leads to the increase of activation energy required during sintering, which is not conducive to solid phase reaction. 

If you also need Barium Ferrite Magnets, Ferrite Disk Magnets, Hard Ferrite Magnet, Disc Ferrite Magnet,feel free to contact us.

The main performance and grade parameters of Anisotropic Ferrite Magnets and Isotropic Ferrite Magnets