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单词 Soft magnetic material
释义

Soft magnetic material

中文百科

矫顽力 Coercivity

(重定向自Soft magnetic material)
一组电磁钢的磁滞曲线,其中BR为剩磁,HC为矫顽力
图中和横轴的交点即为矫顽力

矫顽力coercivity)也称为矫顽性保磁力,是磁性材料的特性之一,是指在磁性材料已经磁化到磁饱和后,要使其磁化强度减到零所需要的磁场强度。矫顽力代表磁性材料抵抗退磁的能力,会用HC的符号表示,单位为A/m(国际标准制)或Oe(高斯单位制)。矫顽力可以用磁强计或是B-H分析仪量测。

若铁磁性材料(包含亚铁磁性材料)的矫顽力大,则称为硬磁性,可以用来作为永久磁铁的材料。永久磁铁可以用在马达、磁性保存媒体(如硬盘、磁盘片或磁带)、及矿石处理中的磁性分离器。

矫顽力小的铁磁性材料则称为软磁性,可以用在变压器及电感器的铁芯,磁性保存媒体的读写头、微波设备及电磁屏蔽设备中。

英语百科

Coercivity 矫顽力

(重定向自Soft magnetic material)
A family of hysteresis loops for grain-oriented electrical steel. BR denotes retentivity and HC is the coercivity.  The wider the outside loop is, the higher the coercivity. Movement on the loops is counterclockwise.
The coercivity is a horizontal inte****t of the hysteresis loop.

In electrical engineering and materials science, the coercivity, also called the magnetic coercivity, coercive field or coercive force, is a measure of the ability of a ferromagnetic material to withstand an external magnetic field without becoming demagnetized. An analogous property, electric coercivity, is the ability of a ferroelectric material to withstand an external electric field without becoming depolarized.

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更新时间:2025/6/17 11:23:03