Magnetic Ferrite Y35 Block Magnet
Magnetic ferrite block magnets are produced by powder metallurgy, with low remanence and low restitution permeability. High coercivity and strong demagnetization ability are especially suitable for the magnetic circuit structure used for dynamic working conditions. The material is hard and brittle, and can be used for emery tool cutting. The main raw material is oxide, so it is not easy to corrode. Working temperature: - 40 ℃ to + 200 ℃.
Ferrite magnets are also classified into anisotropy (heteroscedasticity) and isotropy (isotropy).
In the actual production of ferrite magnets, the raw materials with good chemical composition may not be able to obtain the ferrite magnets with good performance and microstructure. The reason is the influence of physical properties. The physical properties of iron oxide listed include average particle size APS, specific surface area SSA and loose density BD. Because iron oxide accounts for about 70% of the manganese zinc ferrite magnet formula, its APS value has a great influence on the APS value of ferrite magnet powder. Generally speaking, the APS value of ferric oxide is small, and the APS value of ferrite magnet powder is small, which is conducive to accelerating the chemical reaction speed. However, the APS value should not be too small considering that the fineness of powder particles is not conducive to the post-channel pressing and sintering and easy crystallization. Obviously, when the APS value of iron oxide is too large, the diffusion reaction of spinel phase can only be carried out due to the large particle size in the pre-sintering process, and the grain growth process cannot be further carried out. This will inevitably lead to increased activation energy required for sintering, which is not conducive to solid reaction.
Ferrite magnetic materials are hard and brittle, should be handled lightly (especially large size and thin sheet), when the magnet itself or with other iron suction or separation, careful operation not to impact. Otherwise, it may damage the magnet or splint finger due to collision. Because ferrite permanent magnet is a kind of polymetallic alloy material and ceramic technology, it has the characteristics of heavy and brittle. Therefore, special care should be taken in handling and handling, so as not to break magnetic particles, break them or break them. It is recommended to push the magnets apart when they are attracted to each other.