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How strong is the attraction of NdFeB magnet?

Date:2021/3/29   Click:

6个小实验就能看出钕铁硼强力磁铁的威力有多大了。两块磁铁之间的打火机可以瞬间被压爆起火,一块磁铁可以把电视画面吸变形,这并不是夸张。钕铁硼磁铁可以说是目前最强大的磁铁,被称之为磁铁之王。相同状况下,其磁能积(所谓磁能积是衡量磁体所存储能量大小的参数)是普通铁氧体的10倍以上。它也是目前最常使用的稀土磁铁,我们常见的永磁电机、磁盘驱动器、磁共振成像等很多零件仪器上面都会用到。

钕铁硼磁铁主要成分是稀土元素钕,稀土并不是因为它的浓度较低而称之为稀土,而是相比于其他通过化学键相连的材料分离起来更困难。虽说钕铁硼磁铁的磁吸力很强,甚至流传钕铁硼磁铁可以吸起自身重量的600倍。但其实这种说法并不全面,因为磁吸力还受到形状、距离等多个条件的影响。比如同样直径的磁铁,磁铁越高磁吸力就越强;相同高度的磁铁,直径越大磁吸力则越大。

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