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Development of high performance metallic magnetic core using new magnetic phenomenon

利用新磁现象开发高性能金属磁芯

基本信息

批准号：
10650312
负责人：
FUKUNAGA Hirotoshi
金额：
$ 1.66万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650312/
关键词：
low permeability magnetic loss amorphous crystallization domain wall pinning site magnetization rotation dc-biased field

项目摘要

An excessive annealing of amorphous Fe-Cu-Nb-Si-B ribbons precipitated FeィイD22ィエD2B fine crystallites in the nanostructured Fe-Cu-Nb-Si-B mother phases. The precipitated crystallites played the role of pining sites of domain walls, and reduced the permeability of the ribbons down to approximately 300 without a significant increase in magnetic loss. The magnetic loss of the developed ribbons is comparable with that of Mn-Zn ferrite and an amorphous cut core with air-gaps, and the saturation magnetization of the ribbons is approximately three times as high as that of ferrite. In addition, the permeability of the ribbons can be adjusted to a desired value after preparation of a core.Further investigation on magnetic properties under a dc-biased field, however, revealed that the magnetic loss of the prepared ribbons increases significantly under a dc-biased field, and that the magnetization rotation mode is preferred for reducing magnetic loss under a dc-biased field. Thus, nanostructured Fe-Cu-Nb-Si-B ribbons in which the magnetization changes by its rotation were also developed by using the creep-induced anisotropy, and a gap-less magnetic core with low loss and low permeability was prepared from the prepared ribbon. Actually, the magnetic loss of the prepared core did not increase even under a dc-bias field.The saturation magnetization of the prepared core is approximately three times as high as that of ferrite, and the constancy of its permeability under a dc-bias field is superior than that of a ferrite core. In addition, the magnetic loss of the core is 2/3 of that of a ferrite core (100kHz, 0.1T, under a dc-bias field). Therefore, the developed core is considered to be applied to electronic devices.

非晶Fe-Cu-Nb-Si-B薄带的过度退火在纳米结构Fe-Cu-Nb-Si-B母相中析出了Fe_（60）D_22_（60）D_2B细晶。析出的微晶发挥的作用，钉扎网站的域壁，并降低了带的磁导率下降到约300，而没有显着增加的磁损耗。所研制的薄带的磁损耗与Mn-Zn铁氧体和带气隙的非晶切割磁芯相当，其饱和磁化强度约为铁氧体的3倍。此外，在制备磁芯之后，可以将带的磁导率调节到所需的值。然而，在直流偏置场下的磁性能的进一步研究显示，所制备的带的磁损耗在直流偏置场下显著增加，并且磁化旋转模式是优选的，以减少直流偏置场下的磁损耗。因此，纳米结构的Fe-Cu-Nb-Si-B带，其中的磁化强度的变化，通过使用蠕变诱导各向异性也被开发出来，和一个无间隙的磁芯具有低损耗和低磁导率的制备的带。实际上，即使在直流偏磁场下，所制备的磁芯的磁损耗也没有增加，其饱和磁化强度约为铁氧体的3倍，其磁导率在直流偏磁场下的恒定性也优于铁氧体磁芯的上级。此外，磁芯的磁损耗是铁氧体磁芯（100 kHz，0.1T，在直流偏置场下）的2/3。因此，开发的核心被认为是应用于电子设备。