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Ndfeb magnet demagnetization of high temperature is the most effective solution

by:Newland     2020-03-26
Friends a little magnet knowledge knows, ndfeb magnet is magnetic materials industry recognized high performance and high ratio of magnets, many high-tech fields are specified to use all kinds of spare parts, such as national defense military, electronic science and technology, medical equipment, electrical appliances, and other fields are involved. Use more easy to found the problem, which the ndfeb strong magnet demagnetization phenomenon has attracted much attention in the high temperature environment. Why are ndfeb demagnetization the environment of high temperature? Ndfeb is the demagnetization phenomena in high temperature environment, which is decided by its physical structure. General magnet can produce a magnetic field, because the material itself carried by electrons around the atoms in a certain direction of rotation, resulting in a certain magnetic field force, and influence on surrounding related affairs. But electrons around the atoms in accordance with the established direction also has a certain temperature conditions, different magnetic material can withstand temperature is different, in the case of too high temperature, the electronic will deviate from the original track, chaotic phenomenon, magnetic material at this time the local magnetic field will be upset, and demagnetization. And ndfeb magnet resistance temperature is around in the baidu, which is more than two baidu will appear demagnetization phenomenon, if the temperature is more high, demagnetization phenomenon is more serious. High temperature permanent magnet demagnetization is degaussing or temporarily degaussing? Summary of the Curie temperature is 320 ℃ 380 ℃, but in fact ndfeb molecular structure has changed, when heated to reach in theory the Curie temperature of the magnetic force is back out. I do the experiments of ndfeb heat resistance is 100 degrees, when heated to 100 degrees or so began to drop magnetic, but speed does not open, clear rapid decline after 150 degrees, 150 degrees 20 minutes magnetic base is back out. After take back light magnetic ndfeb magnetization can only achieve about 50% of the original. The phenomenon of black and surface oxidation. Several of ndfeb magnet demagnetization of high temperature is the most effective solution to a, don't put the ndfeb magnet products in high temperature, pay particular attention to its critical temperature, i. e. baidu, timely adjust its working environment temperature, can minimize the demagnetization phenomenon occurred. Two, is from the technology, improve the performance of the use of ndfeb magnet products that it can have more temperature structure, is not susceptible to environmental impact. Three, you can also select the same material of magnetic energy product and high coercive force, magnetic energy product if it is not the only sacrifice, looking for a lower magnetic energy product, higher coercive force of the material, then no, you can choose to use a samarium cobalt, as for the reversible demagnetization, just choose the samarium cobalt. PS: each material has different characteristics, so choosing the right, is the economy, will be thoughtful design, otherwise it will damage! Articles by Ricky magnet card factory integration xiaofu, starting in October 2017. Associated with this article magnet demagnetization articles; Out of magnetic magnet what are the difference with the original no demagnetization magnet? How to put magnetic ndfeb strong magnet demagnetization clean?
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