环境温度对铁基纳米晶磁芯磁导率的影响

Effect of Ambient Temperature on Magnetic Permeability of Fe-based Nanocrystalline Core

研究了环境温度对热处理后铁基纳米晶磁芯磁导率的影响。结果表明,厚度不同的样品经热处理后均存在一个频率小区域,在这个小区域内工作的磁芯,其磁导率不受环境温度的影响。工作频率低于此频率区域时,磁芯的磁导率随环境温度升高而降低,当环境温度由30℃升到120℃时,磁导率在1 kHz时降幅最大;工作频率高于这一频率区域时,磁芯的磁导率随环境温度的升高而略有升高。

The effects of ambient temperature on the magnetic permeability of Fe-based nanocrystalline cores after heat treatment were studied. The results show that the samples with different thickness after heat treatment have a narrow frequency region at which the magnetic permeability is unaffected by ambient temperature. When the operating frequency is lower than the frequency region, the magnetic permeability of the magnetic core decreases with the increase of ambient temperature. When the ambient temperature increases from 30 ℃ to 120℃, the magnetic permeability gererates the largest drop at magnetic permeability of 1 kHz. When the operating frequency exceeds the certain frequency region, the magnetic permeability of the nanocrystalline cores slightly rises with the ambient temperature increasing.