Rare Earth Y25 Ferrite Disc Magnets

Ceramic Ferrite Magnet can be magnetized from any direction,but the magnetism is less powerful because the crystal direction is varied.On the contrary,the crystal direction of an anisotropic magnet is unidirectional,so the magnetizing direction is on one direction,and the magnetic force is stronger because the crystals are oriented.

Physical property:
In the actual production of Ferrite Magnet, 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 Ferrite Permanent Magnets

Range of applications:

Hard ferrites have high coercivity, so are difficult to demagnetize. They are used to make permanent magnets for applications such as refrigerator magnets, loudspeakers, and small electric motors.